Merge remote-tracking branch 'pleroma/develop' into cycles-reverse-proxy

170 files changed, 3604 insertions, 1379 deletions

diff --git a/lib/mix/tasks/pleroma/config.ex b/lib/mix/tasks/pleroma/config.ex
index 1962154b9..22502a522 100644
--- a/lib/mix/tasks/pleroma/config.ex
+++ b/lib/mix/tasks/pleroma/config.ex
@@ -27,7 +27,7 @@ defmodule Mix.Tasks.Pleroma.Config do
 
       {opts, _} =
         OptionParser.parse!(options,
-          strict: [env: :string, delete: :boolean],
+          strict: [env: :string, delete: :boolean, path: :string],
           aliases: [d: :delete]
         )
 
@@ -259,18 +259,43 @@ defmodule Mix.Tasks.Pleroma.Config do
   defp migrate_from_db(opts) do
     env = opts[:env] || Pleroma.Config.get(:env)
 
+    filename = "#{env}.exported_from_db.secret.exs"
+
     config_path =
-      if Pleroma.Config.get(:release) do
-        :config_path
-        |> Pleroma.Config.get()
-        |> Path.dirname()
-      else
-        "config"
+      cond do
+        opts[:path] ->
+          opts[:path]
+
+        Pleroma.Config.get(:release) ->
+          :config_path
+          |> Pleroma.Config.get()
+          |> Path.dirname()
+
+        true ->
+          "config"
       end
-      |> Path.join("#{env}.exported_from_db.secret.exs")
+      |> Path.join(filename)
 
-    file = File.open!(config_path, [:write, :utf8])
+    with {:ok, file} <- File.open(config_path, [:write, :utf8]) do
+      write_config(file, config_path, opts)
+      shell_info("Database configuration settings have been exported to #{config_path}")
+    else
+      _ ->
+        shell_error("Impossible to save settings to this directory #{Path.dirname(config_path)}")
+        tmp_config_path = Path.join(System.tmp_dir!(), filename)
+        file = File.open!(tmp_config_path)
+
+        shell_info(
+          "Saving database configuration settings to #{tmp_config_path}. Copy it to the #{
+            Path.dirname(config_path)
+          } manually."
+        )
 
+        write_config(file, tmp_config_path, opts)
+    end
+  end
+
+  defp write_config(file, path, opts) do
     IO.write(file, config_header())
 
     ConfigDB
@@ -278,11 +303,7 @@ defmodule Mix.Tasks.Pleroma.Config do
     |> Enum.each(&write_and_delete(&1, file, opts[:delete]))
 
     :ok = File.close(file)
-    System.cmd("mix", ["format", config_path])
-
-    shell_info(
-      "Database configuration settings have been exported to config/#{env}.exported_from_db.secret.exs"
-    )
+    System.cmd("mix", ["format", path])
   end
 
   if Code.ensure_loaded?(Config.Reader) do
diff --git a/lib/mix/tasks/pleroma/database.ex b/lib/mix/tasks/pleroma/database.ex
index 2403ed581..e7f4b67a4 100644
--- a/lib/mix/tasks/pleroma/database.ex
+++ b/lib/mix/tasks/pleroma/database.ex
@@ -8,10 +8,13 @@ defmodule Mix.Tasks.Pleroma.Database do
   alias Pleroma.Object
   alias Pleroma.Repo
   alias Pleroma.User
+
   require Logger
   require Pleroma.Constants
+
   import Ecto.Query
   import Mix.Pleroma
+
   use Mix.Task
 
   @shortdoc "A collection of database related tasks"
@@ -214,4 +217,32 @@ defmodule Mix.Tasks.Pleroma.Database do
       shell_info('Done.')
     end
   end
+
+  # Rolls back a specific migration (leaving subsequent migrations applied).
+  # WARNING: imposes a risk of unrecoverable data loss — proceed at your own responsibility.
+  # Based on https://stackoverflow.com/a/53825840
+  def run(["rollback", version]) do
+    prompt = "SEVERE WARNING: this operation may result in unrecoverable data loss. Continue?"
+
+    if shell_prompt(prompt, "n") in ~w(Yn Y y) do
+      {_, result, _} =
+        Ecto.Migrator.with_repo(Pleroma.Repo, fn repo ->
+          version = String.to_integer(version)
+          re = ~r/^#{version}_.*\.exs/
+          path = Ecto.Migrator.migrations_path(repo)
+
+          with {_, "" <> file} <- {:find, Enum.find(File.ls!(path), &String.match?(&1, re))},
+               {_, [{mod, _} | _]} <- {:compile, Code.compile_file(Path.join(path, file))},
+               {_, :ok} <- {:rollback, Ecto.Migrator.down(repo, version, mod)} do
+            {:ok, "Reversed migration: #{file}"}
+          else
+            {:find, _} -> {:error, "No migration found with version prefix: #{version}"}
+            {:compile, e} -> {:error, "Problem compiling migration module: #{inspect(e)}"}
+            {:rollback, e} -> {:error, "Problem reversing migration: #{inspect(e)}"}
+          end
+        end)
+
+      shell_info(inspect(result))
+    end
+  end
 end
diff --git a/lib/pleroma/activity.ex b/lib/pleroma/activity.ex
index 6542e684e..53beca5e6 100644
--- a/lib/pleroma/activity.ex
+++ b/lib/pleroma/activity.ex
@@ -113,6 +113,7 @@ defmodule Pleroma.Activity do
     from([a] in query,
       left_join: b in Bookmark,
       on: b.user_id == ^user.id and b.activity_id == a.id,
+      as: :bookmark,
       preload: [bookmark: b]
     )
   end
@@ -123,6 +124,7 @@ defmodule Pleroma.Activity do
     from([a] in query,
       left_join: r in ReportNote,
       on: a.id == r.activity_id,
+      as: :report_note,
       preload: [report_notes: r]
     )
   end
@@ -182,40 +184,48 @@ defmodule Pleroma.Activity do
     |> Repo.one()
   end
 
-  @spec get_by_id(String.t()) :: Activity.t() | nil
-  def get_by_id(id) do
-    case FlakeId.flake_id?(id) do
-      true ->
-        Activity
-        |> where([a], a.id == ^id)
-        |> restrict_deactivated_users()
-        |> Repo.one()
-
-      _ ->
-        nil
-    end
-  end
-
-  def get_by_id_with_user_actor(id) do
-    case FlakeId.flake_id?(id) do
-      true ->
-        Activity
-        |> where([a], a.id == ^id)
-        |> with_preloaded_user_actor()
-        |> Repo.one()
-
-      _ ->
-        nil
+  @doc """
+  Gets activity by ID, doesn't load activities from deactivated actors by default.
+  """
+  @spec get_by_id(String.t(), keyword()) :: t() | nil
+  def get_by_id(id, opts \\ [filter: [:restrict_deactivated]]), do: get_by_id_with_opts(id, opts)
+
+  @spec get_by_id_with_user_actor(String.t()) :: t() | nil
+  def get_by_id_with_user_actor(id), do: get_by_id_with_opts(id, preload: [:user_actor])
+
+  @spec get_by_id_with_object(String.t()) :: t() | nil
+  def get_by_id_with_object(id), do: get_by_id_with_opts(id, preload: [:object])
+
+  defp get_by_id_with_opts(id, opts) do
+    if FlakeId.flake_id?(id) do
+      query = Queries.by_id(id)
+
+      with_filters_query =
+        if is_list(opts[:filter]) do
+          Enum.reduce(opts[:filter], query, fn
+            {:type, type}, acc -> Queries.by_type(acc, type)
+            :restrict_deactivated, acc -> restrict_deactivated_users(acc)
+            _, acc -> acc
+          end)
+        else
+          query
+        end
+
+      with_preloads_query =
+        if is_list(opts[:preload]) do
+          Enum.reduce(opts[:preload], with_filters_query, fn
+            :user_actor, acc -> with_preloaded_user_actor(acc)
+            :object, acc -> with_preloaded_object(acc)
+            _, acc -> acc
+          end)
+        else
+          with_filters_query
+        end
+
+      Repo.one(with_preloads_query)
     end
   end
 
-  def get_by_id_with_object(id) do
-    Activity
-    |> where(id: ^id)
-    |> with_preloaded_object()
-    |> Repo.one()
-  end
-
   def all_by_ids_with_object(ids) do
     Activity
     |> where([a], a.id in ^ids)
@@ -267,6 +277,11 @@ defmodule Pleroma.Activity do
 
   def get_create_by_object_ap_id_with_object(_), do: nil
 
+  @spec create_by_id_with_object(String.t()) :: t() | nil
+  def create_by_id_with_object(id) do
+    get_by_id_with_opts(id, preload: [:object], filter: [type: "Create"])
+  end
+
   defp get_in_reply_to_activity_from_object(%Object{data: %{"inReplyTo" => ap_id}}) do
     get_create_by_object_ap_id_with_object(ap_id)
   end
@@ -366,12 +381,6 @@ defmodule Pleroma.Activity do
     end
   end
 
-  @spec pinned_by_actor?(Activity.t()) :: boolean()
-  def pinned_by_actor?(%Activity{} = activity) do
-    actor = user_actor(activity)
-    activity.id in actor.pinned_activities
-  end
-
   @spec get_by_object_ap_id_with_object(String.t()) :: t() | nil
   def get_by_object_ap_id_with_object(ap_id) when is_binary(ap_id) do
     ap_id
@@ -382,4 +391,13 @@ defmodule Pleroma.Activity do
   end
 
   def get_by_object_ap_id_with_object(_), do: nil
+
+  @spec add_by_params_query(String.t(), String.t(), String.t()) :: Ecto.Query.t()
+  def add_by_params_query(object_id, actor, target) do
+    object_id
+    |> Queries.by_object_id()
+    |> Queries.by_type("Add")
+    |> Queries.by_actor(actor)
+    |> where([a], fragment("?->>'target' = ?", a.data, ^target))
+  end
 end
diff --git a/lib/pleroma/activity/html.ex b/lib/pleroma/activity/html.ex
new file mode 100644
index 000000000..0bf393836
--- /dev/null
+++ b/lib/pleroma/activity/html.ex
@@ -0,0 +1,45 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Activity.HTML do
+  alias Pleroma.HTML
+  alias Pleroma.Object
+
+  @cachex Pleroma.Config.get([:cachex, :provider], Cachex)
+
+  def get_cached_scrubbed_html_for_activity(
+        content,
+        scrubbers,
+        activity,
+        key \\ "",
+        callback \\ fn x -> x end
+      ) do
+    key = "#{key}#{generate_scrubber_signature(scrubbers)}|#{activity.id}"
+
+    @cachex.fetch!(:scrubber_cache, key, fn _key ->
+      object = Object.normalize(activity, fetch: false)
+      HTML.ensure_scrubbed_html(content, scrubbers, object.data["fake"] || false, callback)
+    end)
+  end
+
+  def get_cached_stripped_html_for_activity(content, activity, key) do
+    get_cached_scrubbed_html_for_activity(
+      content,
+      FastSanitize.Sanitizer.StripTags,
+      activity,
+      key,
+      &HtmlEntities.decode/1
+    )
+  end
+
+  defp generate_scrubber_signature(scrubber) when is_atom(scrubber) do
+    generate_scrubber_signature([scrubber])
+  end
+
+  defp generate_scrubber_signature(scrubbers) do
+    Enum.reduce(scrubbers, "", fn scrubber, signature ->
+      "#{signature}#{to_string(scrubber)}"
+    end)
+  end
+end
diff --git a/lib/pleroma/activity/ir/topics.ex b/lib/pleroma/activity/ir/topics.ex
index d94395fc1..7a603a615 100644
--- a/lib/pleroma/activity/ir/topics.ex
+++ b/lib/pleroma/activity/ir/topics.ex
@@ -48,14 +48,12 @@ defmodule Pleroma.Activity.Ir.Topics do
     tags
   end
 
-  defp hashtags_to_topics(%{data: %{"tag" => tags}}) do
-    tags
-    |> Enum.filter(&is_bitstring(&1))
-    |> Enum.map(fn tag -> "hashtag:" <> tag end)
+  defp hashtags_to_topics(object) do
+    object
+    |> Object.hashtags()
+    |> Enum.map(fn hashtag -> "hashtag:" <> hashtag end)
   end
 
-  defp hashtags_to_topics(_), do: []
-
   defp remote_topics(%{local: true}), do: []
 
   defp remote_topics(%{actor: actor}) when is_binary(actor),
diff --git a/lib/pleroma/activity/queries.ex b/lib/pleroma/activity/queries.ex
index a6b02a889..4632651b0 100644
--- a/lib/pleroma/activity/queries.ex
+++ b/lib/pleroma/activity/queries.ex
@@ -14,6 +14,11 @@ defmodule Pleroma.Activity.Queries do
   alias Pleroma.Activity
   alias Pleroma.User
 
+  @spec by_id(query(), String.t()) :: query()
+  def by_id(query \\ Activity, id) do
+    from(a in query, where: a.id == ^id)
+  end
+
   @spec by_ap_id(query, String.t()) :: query
   def by_ap_id(query \\ Activity, ap_id) do
     from(
diff --git a/lib/pleroma/application.ex b/lib/pleroma/application.ex
index c853a2bb4..9824e0a4a 100644
--- a/lib/pleroma/application.ex
+++ b/lib/pleroma/application.ex
@@ -25,7 +25,7 @@ defmodule Pleroma.Application do
     if Process.whereis(Pleroma.Web.Endpoint) do
       case Config.get([:http, :user_agent], :default) do
         :default ->
-          info = "#{Pleroma.Web.base_url()} <#{Config.get([:instance, :email], "")}>"
+          info = "#{Pleroma.Web.Endpoint.url()} <#{Config.get([:instance, :email], "")}>"
           named_version() <> "; " <> info
 
         custom ->
@@ -102,10 +102,8 @@ defmodule Pleroma.Application do
         ] ++
         task_children(@mix_env) ++
         dont_run_in_test(@mix_env) ++
-        chat_child(chat_enabled?()) ++
-        [
-          Pleroma.Gopher.Server
-        ]
+        shout_child(shout_enabled?()) ++
+        [Pleroma.Gopher.Server]
 
     # See http://elixir-lang.org/docs/stable/elixir/Supervisor.html
     # for other strategies and supported options
@@ -218,7 +216,7 @@ defmodule Pleroma.Application do
       type: :worker
     }
 
-  defp chat_enabled?, do: Config.get([:chat, :enabled])
+  defp shout_enabled?, do: Config.get([:shout, :enabled])
 
   defp dont_run_in_test(env) when env in [:test, :benchmark], do: []
 
@@ -230,17 +228,23 @@ defmodule Pleroma.Application do
          keys: :duplicate,
          partitions: System.schedulers_online()
        ]}
+    ] ++ background_migrators()
+  end
+
+  defp background_migrators do
+    [
+      Pleroma.Migrators.HashtagsTableMigrator
     ]
   end
 
-  defp chat_child(true) do
+  defp shout_child(true) do
     [
-      Pleroma.Web.ChatChannel.ChatChannelState,
+      Pleroma.Web.ShoutChannel.ShoutChannelState,
       {Phoenix.PubSub, [name: Pleroma.PubSub, adapter: Phoenix.PubSub.PG2]}
     ]
   end
 
-  defp chat_child(_), do: []
+  defp shout_child(_), do: []
 
   defp task_children(:test) do
     [
diff --git a/lib/pleroma/application_requirements.ex b/lib/pleroma/application_requirements.ex
index 6ef65b263..ee6ee9516 100644
--- a/lib/pleroma/application_requirements.ex
+++ b/lib/pleroma/application_requirements.ex
@@ -34,15 +34,16 @@ defmodule Pleroma.ApplicationRequirements do
   defp check_welcome_message_config!(:ok) do
     if Pleroma.Config.get([:welcome, :email, :enabled], false) and
          not Pleroma.Emails.Mailer.enabled?() do
-      Logger.error("""
-      To send welcome email do you need to enable mail.
-      \nconfig :pleroma, Pleroma.Emails.Mailer, enabled: true
-      """)
+      Logger.warn("""
+      To send welcome emails, you need to enable the mailer.
+      Welcome emails will NOT be sent with the current config.
 
-      {:error, "The mail disabled."}
-    else
-      :ok
+      Enable the mailer:
+        config :pleroma, Pleroma.Emails.Mailer, enabled: true
+      """)
     end
+
+    :ok
   end
 
   defp check_welcome_message_config!(result), do: result
@@ -51,18 +52,21 @@ defmodule Pleroma.ApplicationRequirements do
   #
   def check_confirmation_accounts!(:ok) do
     if Pleroma.Config.get([:instance, :account_activation_required]) &&
-         not Pleroma.Config.get([Pleroma.Emails.Mailer, :enabled]) do
-      Logger.error(
-        "Account activation enabled, but no Mailer settings enabled.\n" <>
-          "Please set config :pleroma, :instance, account_activation_required: false\n" <>
-          "Otherwise setup and enable Mailer."
-      )
+         not Pleroma.Emails.Mailer.enabled?() do
+      Logger.warn("""
+      Account activation is required, but the mailer is disabled.
+      Users will NOT be able to confirm their accounts with this config.
+      Either disable account activation or enable the mailer.
 
-      {:error,
-       "Account activation enabled, but Mailer is disabled. Cannot send confirmation emails."}
-    else
-      :ok
+      Disable account activation:
+        config :pleroma, :instance, account_activation_required: false
+
+      Enable the mailer:
+        config :pleroma, Pleroma.Emails.Mailer, enabled: true
+      """)
     end
+
+    :ok
   end
 
   def check_confirmation_accounts!(result), do: result
@@ -160,9 +164,11 @@ defmodule Pleroma.ApplicationRequirements do
 
   defp check_system_commands!(:ok) do
     filter_commands_statuses = [
-      check_filter(Pleroma.Upload.Filters.Exiftool, "exiftool"),
-      check_filter(Pleroma.Upload.Filters.Mogrify, "mogrify"),
-      check_filter(Pleroma.Upload.Filters.Mogrifun, "mogrify")
+      check_filter(Pleroma.Upload.Filter.Exiftool, "exiftool"),
+      check_filter(Pleroma.Upload.Filter.Mogrify, "mogrify"),
+      check_filter(Pleroma.Upload.Filter.Mogrifun, "mogrify"),
+      check_filter(Pleroma.Upload.Filter.AnalyzeMetadata, "mogrify"),
+      check_filter(Pleroma.Upload.Filter.AnalyzeMetadata, "convert")
     ]
 
     preview_proxy_commands_status =
diff --git a/lib/pleroma/config.ex b/lib/pleroma/config.ex
index 2e15a3719..54e332595 100644
--- a/lib/pleroma/config.ex
+++ b/lib/pleroma/config.ex
@@ -99,4 +99,8 @@ defmodule Pleroma.Config do
   def oauth_consumer_strategies, do: get([:auth, :oauth_consumer_strategies], [])
 
   def oauth_consumer_enabled?, do: oauth_consumer_strategies() != []
+
+  def feature_enabled?(feature_name) do
+    get([:features, feature_name]) not in [nil, false, :disabled, :auto]
+  end
 end
diff --git a/lib/pleroma/config/deprecation_warnings.ex b/lib/pleroma/config/deprecation_warnings.ex
index 24aa5993b..fedd58a7e 100644
--- a/lib/pleroma/config/deprecation_warnings.ex
+++ b/lib/pleroma/config/deprecation_warnings.ex
@@ -41,7 +41,8 @@ defmodule Pleroma.Config.DeprecationWarnings do
          :ok <- check_gun_pool_options(),
          :ok <- check_activity_expiration_config(),
          :ok <- check_remote_ip_plug_name(),
-         :ok <- check_uploders_s3_public_endpoint() do
+         :ok <- check_uploders_s3_public_endpoint(),
+         :ok <- check_old_chat_shoutbox() do
       :ok
     else
       _ ->
@@ -215,4 +216,27 @@ defmodule Pleroma.Config.DeprecationWarnings do
       :ok
     end
   end
+
+  @spec check_old_chat_shoutbox() :: :ok | nil
+  def check_old_chat_shoutbox do
+    instance_config = Pleroma.Config.get([:instance])
+    chat_config = Pleroma.Config.get([:chat]) || []
+
+    use_old_config =
+      Keyword.has_key?(instance_config, :chat_limit) or
+        Keyword.has_key?(chat_config, :enabled)
+
+    if use_old_config do
+      Logger.error("""
+      !!!DEPRECATION WARNING!!!
+      Your config is using the old namespace for the Shoutbox configuration. You need to convert to the new namespace. e.g.,
+      \n* `config :pleroma, :chat, enabled` and `config :pleroma, :instance, chat_limit` are now equal to:
+      \n* `config :pleroma, :shout, enabled` and `config :pleroma, :shout, limit`
+      """)
+
+      :error
+    else
+      :ok
+    end
+  end
 end
diff --git a/lib/pleroma/config/loader.ex b/lib/pleroma/config/loader.ex
index b64d06707..9489f58c4 100644
--- a/lib/pleroma/config/loader.ex
+++ b/lib/pleroma/config/loader.ex
@@ -3,19 +3,21 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Config.Loader do
-  @reject_keys [
-    Pleroma.Repo,
-    Pleroma.Web.Endpoint,
-    :env,
-    :configurable_from_database,
-    :database,
-    :swarm
-  ]
-
-  @reject_groups [
-    :postgrex,
-    :tesla
-  ]
+  defp reject_keys,
+    do: [
+      Pleroma.Repo,
+      Pleroma.Web.Endpoint,
+      :env,
+      :configurable_from_database,
+      :database,
+      :swarm
+    ]
+
+  defp reject_groups,
+    do: [
+      :postgrex,
+      :tesla
+    ]
 
   if Code.ensure_loaded?(Config.Reader) do
     @reader Config.Reader
@@ -52,7 +54,7 @@ defmodule Pleroma.Config.Loader do
   @spec filter_group(atom(), keyword()) :: keyword()
   def filter_group(group, configs) do
     Enum.reject(configs[group], fn {key, _v} ->
-      key in @reject_keys or group in @reject_groups or
+      key in reject_keys() or group in reject_groups() or
         (group == :phoenix and key == :serve_endpoints)
     end)
   end
diff --git a/lib/pleroma/config/release_runtime_provider.ex b/lib/pleroma/config/release_runtime_provider.ex
index 8227195dc..e5e9d3dcd 100644
--- a/lib/pleroma/config/release_runtime_provider.ex
+++ b/lib/pleroma/config/release_runtime_provider.ex
@@ -1,6 +1,6 @@
 defmodule Pleroma.Config.ReleaseRuntimeProvider do
   @moduledoc """
-  Imports `runtime.exs` and `{env}.exported_from_db.secret.exs` for elixir releases.
+  Imports runtime config and `{env}.exported_from_db.secret.exs` for releases.
   """
   @behaviour Config.Provider
 
@@ -8,10 +8,11 @@ defmodule Pleroma.Config.ReleaseRuntimeProvider do
   def init(opts), do: opts
 
   @impl true
-  def load(config, _opts) do
+  def load(config, opts) do
     with_defaults = Config.Reader.merge(config, Pleroma.Config.Holder.release_defaults())
 
-    config_path = System.get_env("PLEROMA_CONFIG_PATH") || "/etc/pleroma/config.exs"
+    config_path =
+      opts[:config_path] || System.get_env("PLEROMA_CONFIG_PATH") || "/etc/pleroma/config.exs"
 
     with_runtime_config =
       if File.exists?(config_path) do
@@ -24,7 +25,7 @@ defmodule Pleroma.Config.ReleaseRuntimeProvider do
         warning = [
           IO.ANSI.red(),
           IO.ANSI.bright(),
-          "!!! #{config_path} not found! Please ensure it exists and that PLEROMA_CONFIG_PATH is unset or points to an existing file",
+          "!!! Config path is not declared! Please ensure it exists and that PLEROMA_CONFIG_PATH is unset or points to an existing file",
           IO.ANSI.reset()
         ]
 
@@ -33,13 +34,14 @@ defmodule Pleroma.Config.ReleaseRuntimeProvider do
       end
 
     exported_config_path =
-      config_path
-      |> Path.dirname()
-      |> Path.join("prod.exported_from_db.secret.exs")
+      opts[:exported_config_path] ||
+        config_path
+        |> Path.dirname()
+        |> Path.join("#{Pleroma.Config.get(:env)}.exported_from_db.secret.exs")
 
     with_exported =
       if File.exists?(exported_config_path) do
-        exported_config = Config.Reader.read!(with_runtime_config)
+        exported_config = Config.Reader.read!(exported_config_path)
         Config.Reader.merge(with_runtime_config, exported_config)
       else
         with_runtime_config
diff --git a/lib/pleroma/config/transfer_task.ex b/lib/pleroma/config/transfer_task.ex
index aad45aab8..d5c6081a2 100644
--- a/lib/pleroma/config/transfer_task.ex
+++ b/lib/pleroma/config/transfer_task.ex
@@ -13,23 +13,25 @@ defmodule Pleroma.Config.TransferTask do
 
   @type env() :: :test | :benchmark | :dev | :prod
 
-  @reboot_time_keys [
-    {:pleroma, :hackney_pools},
-    {:pleroma, :chat},
-    {:pleroma, Oban},
-    {:pleroma, :rate_limit},
-    {:pleroma, :markup},
-    {:pleroma, :streamer},
-    {:pleroma, :pools},
-    {:pleroma, :connections_pool}
-  ]
-
-  @reboot_time_subkeys [
-    {:pleroma, Pleroma.Captcha, [:seconds_valid]},
-    {:pleroma, Pleroma.Upload, [:proxy_remote]},
-    {:pleroma, :instance, [:upload_limit]},
-    {:pleroma, :gopher, [:enabled]}
-  ]
+  defp reboot_time_keys,
+    do: [
+      {:pleroma, :hackney_pools},
+      {:pleroma, :shout},
+      {:pleroma, Oban},
+      {:pleroma, :rate_limit},
+      {:pleroma, :markup},
+      {:pleroma, :streamer},
+      {:pleroma, :pools},
+      {:pleroma, :connections_pool}
+    ]
+
+  defp reboot_time_subkeys,
+    do: [
+      {:pleroma, Pleroma.Captcha, [:seconds_valid]},
+      {:pleroma, Pleroma.Upload, [:proxy_remote]},
+      {:pleroma, :instance, [:upload_limit]},
+      {:pleroma, :gopher, [:enabled]}
+    ]
 
   def start_link(restart_pleroma? \\ true) do
     load_and_update_env([], restart_pleroma?)
@@ -165,12 +167,12 @@ defmodule Pleroma.Config.TransferTask do
   end
 
   defp group_and_key_need_reboot?(group, key) do
-    Enum.any?(@reboot_time_keys, fn {g, k} -> g == group and k == key end)
+    Enum.any?(reboot_time_keys(), fn {g, k} -> g == group and k == key end)
   end
 
   defp group_and_subkey_need_reboot?(group, key, value) do
     Keyword.keyword?(value) and
-      Enum.any?(@reboot_time_subkeys, fn {g, k, subkeys} ->
+      Enum.any?(reboot_time_subkeys(), fn {g, k, subkeys} ->
         g == group and k == key and
           Enum.any?(Keyword.keys(value), &(&1 in subkeys))
       end)
diff --git a/lib/pleroma/config_db.ex b/lib/pleroma/config_db.ex
index b874e0e37..cb57673e3 100644
--- a/lib/pleroma/config_db.ex
+++ b/lib/pleroma/config_db.ex
@@ -387,6 +387,6 @@ defmodule Pleroma.ConfigDB do
   @spec module_name?(String.t()) :: boolean()
   def module_name?(string) do
     Regex.match?(~r/^(Pleroma|Phoenix|Tesla|Quack|Ueberauth|Swoosh)\./, string) or
-      string in ["Oban", "Ueberauth", "ExSyslogger"]
+      string in ["Oban", "Ueberauth", "ExSyslogger", "ConcurrentLimiter"]
   end
 end
diff --git a/lib/pleroma/constants.ex b/lib/pleroma/constants.ex
index b24338cc6..bf92f65cb 100644
--- a/lib/pleroma/constants.ex
+++ b/lib/pleroma/constants.ex
@@ -27,6 +27,4 @@ defmodule Pleroma.Constants do
     do:
       ~w(index.html robots.txt static static-fe finmoji emoji packs sounds images instance sw.js sw-pleroma.js favicon.png schemas doc embed.js embed.css)
   )
-
-  def as_local_public, do: Pleroma.Web.base_url() <> "/#Public"
 end
diff --git a/lib/pleroma/data_migration.ex b/lib/pleroma/data_migration.ex
new file mode 100644
index 000000000..1377af16e
--- /dev/null
+++ b/lib/pleroma/data_migration.ex
@@ -0,0 +1,45 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.DataMigration do
+  use Ecto.Schema
+
+  alias Pleroma.DataMigration
+  alias Pleroma.DataMigration.State
+  alias Pleroma.Repo
+
+  import Ecto.Changeset
+  import Ecto.Query
+
+  schema "data_migrations" do
+    field(:name, :string)
+    field(:state, State, default: :pending)
+    field(:feature_lock, :boolean, default: false)
+    field(:params, :map, default: %{})
+    field(:data, :map, default: %{})
+
+    timestamps()
+  end
+
+  def changeset(data_migration, params \\ %{}) do
+    data_migration
+    |> cast(params, [:name, :state, :feature_lock, :params, :data])
+    |> validate_required([:name])
+    |> unique_constraint(:name)
+  end
+
+  def update_one_by_id(id, params \\ %{}) do
+    with {1, _} <-
+           from(dm in DataMigration, where: dm.id == ^id)
+           |> Repo.update_all(set: params) do
+      :ok
+    end
+  end
+
+  def get_by_name(name) do
+    Repo.get_by(DataMigration, name: name)
+  end
+
+  def populate_hashtags_table, do: get_by_name("populate_hashtags_table")
+end
diff --git a/lib/pleroma/delivery.ex b/lib/pleroma/delivery.ex
index e8d536767..511d5cf58 100644
--- a/lib/pleroma/delivery.ex
+++ b/lib/pleroma/delivery.ex
@@ -9,7 +9,6 @@ defmodule Pleroma.Delivery do
   alias Pleroma.Object
   alias Pleroma.Repo
   alias Pleroma.User
-  alias Pleroma.User
 
   import Ecto.Changeset
   import Ecto.Query
diff --git a/lib/pleroma/earmark_renderer.ex b/lib/pleroma/earmark_renderer.ex
deleted file mode 100644
index 31cae3c72..000000000
--- a/lib/pleroma/earmark_renderer.ex
+++ /dev/null
@@ -1,256 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-#
-# This file is derived from Earmark, under the following copyright:
-# Copyright © 2014 Dave Thomas, The Pragmatic Programmers
-# SPDX-License-Identifier: Apache-2.0
-# Upstream: https://github.com/pragdave/earmark/blob/master/lib/earmark/html_renderer.ex
-defmodule Pleroma.EarmarkRenderer do
-  @moduledoc false
-
-  alias Earmark.Block
-  alias Earmark.Context
-  alias Earmark.HtmlRenderer
-  alias Earmark.Options
-
-  import Earmark.Inline, only: [convert: 3]
-  import Earmark.Helpers.HtmlHelpers
-  import Earmark.Message, only: [add_messages_from: 2, get_messages: 1, set_messages: 2]
-  import Earmark.Context, only: [append: 2, set_value: 2]
-  import Earmark.Options, only: [get_mapper: 1]
-
-  @doc false
-  def render(blocks, %Context{options: %Options{}} = context) do
-    messages = get_messages(context)
-
-    {contexts, html} =
-      get_mapper(context.options).(
-        blocks,
-        &render_block(&1, put_in(context.options.messages, []))
-      )
-      |> Enum.unzip()
-
-    all_messages =
-      contexts
-      |> Enum.reduce(messages, fn ctx, messages1 -> messages1 ++ get_messages(ctx) end)
-
-    {put_in(context.options.messages, all_messages), html |> IO.iodata_to_binary()}
-  end
-
-  #############
-  # Paragraph #
-  #############
-  defp render_block(%Block.Para{lnb: lnb, lines: lines, attrs: attrs}, context) do
-    lines = convert(lines, lnb, context)
-    add_attrs(lines, "<p>#{lines.value}</p>", attrs, [], lnb)
-  end
-
-  ########
-  # Html #
-  ########
-  defp render_block(%Block.Html{html: html}, context) do
-    {context, html}
-  end
-
-  defp render_block(%Block.HtmlComment{lines: lines}, context) do
-    {context, lines}
-  end
-
-  defp render_block(%Block.HtmlOneline{html: html}, context) do
-    {context, html}
-  end
-
-  #########
-  # Ruler #
-  #########
-  defp render_block(%Block.Ruler{lnb: lnb, attrs: attrs}, context) do
-    add_attrs(context, "<hr />", attrs, [], lnb)
-  end
-
-  ###########
-  # Heading #
-  ###########
-  defp render_block(
-         %Block.Heading{lnb: lnb, level: level, content: content, attrs: attrs},
-         context
-       ) do
-    converted = convert(content, lnb, context)
-    html = "<h#{level}>#{converted.value}</h#{level}>"
-    add_attrs(converted, html, attrs, [], lnb)
-  end
-
-  ##############
-  # Blockquote #
-  ##############
-
-  defp render_block(%Block.BlockQuote{lnb: lnb, blocks: blocks, attrs: attrs}, context) do
-    {context1, body} = render(blocks, context)
-    html = "<blockquote>#{body}</blockquote>"
-    add_attrs(context1, html, attrs, [], lnb)
-  end
-
-  #########
-  # Table #
-  #########
-
-  defp render_block(
-         %Block.Table{lnb: lnb, header: header, rows: rows, alignments: aligns, attrs: attrs},
-         context
-       ) do
-    {context1, html} = add_attrs(context, "<table>", attrs, [], lnb)
-    context2 = set_value(context1, html)
-
-    context3 =
-      if header do
-        append(add_trs(append(context2, "<thead>"), [header], "th", aligns, lnb), "</thead>")
-      else
-        # Maybe an error, needed append(context, html)
-        context2
-      end
-
-    context4 = append(add_trs(append(context3, "<tbody>"), rows, "td", aligns, lnb), "</tbody>")
-
-    {context4, [context4.value, "</table>"]}
-  end
-
-  ########
-  # Code #
-  ########
-
-  defp render_block(
-         %Block.Code{lnb: lnb, language: language, attrs: attrs} = block,
-         %Context{options: options} = context
-       ) do
-    class =
-      if language, do: ~s{ class="#{code_classes(language, options.code_class_prefix)}"}, else: ""
-
-    tag = ~s[<pre><code#{class}>]
-    lines = options.render_code.(block)
-    html = ~s[#{tag}#{lines}</code></pre>]
-    add_attrs(context, html, attrs, [], lnb)
-  end
-
-  #########
-  # Lists #
-  #########
-
-  defp render_block(
-         %Block.List{lnb: lnb, type: type, blocks: items, attrs: attrs, start: start},
-         context
-       ) do
-    {context1, content} = render(items, context)
-    html = "<#{type}#{start}>#{content}</#{type}>"
-    add_attrs(context1, html, attrs, [], lnb)
-  end
-
-  # format a single paragraph list item, and remove the para tags
-  defp render_block(
-         %Block.ListItem{lnb: lnb, blocks: blocks, spaced: false, attrs: attrs},
-         context
-       )
-       when length(blocks) == 1 do
-    {context1, content} = render(blocks, context)
-    content = Regex.replace(~r{</?p>}, content, "")
-    html = "<li>#{content}</li>"
-    add_attrs(context1, html, attrs, [], lnb)
-  end
-
-  # format a spaced list item
-  defp render_block(%Block.ListItem{lnb: lnb, blocks: blocks, attrs: attrs}, context) do
-    {context1, content} = render(blocks, context)
-    html = "<li>#{content}</li>"
-    add_attrs(context1, html, attrs, [], lnb)
-  end
-
-  ##################
-  # Footnote Block #
-  ##################
-
-  defp render_block(%Block.FnList{blocks: footnotes}, context) do
-    items =
-      Enum.map(footnotes, fn note ->
-        blocks = append_footnote_link(note)
-        %Block.ListItem{attrs: "#fn:#{note.number}", type: :ol, blocks: blocks}
-      end)
-
-    {context1, html} = render_block(%Block.List{type: :ol, blocks: items}, context)
-    {context1, Enum.join([~s[<div class="footnotes">], "<hr />", html, "</div>"])}
-  end
-
-  #######################################
-  # Isolated IALs are rendered as paras #
-  #######################################
-
-  defp render_block(%Block.Ial{verbatim: verbatim}, context) do
-    {context, "<p>{:#{verbatim}}</p>"}
-  end
-
-  ####################
-  # IDDef is ignored #
-  ####################
-
-  defp render_block(%Block.IdDef{}, context), do: {context, ""}
-
-  #####################################
-  # And here are the inline renderers #
-  #####################################
-
-  defdelegate br, to: HtmlRenderer
-  defdelegate codespan(text), to: HtmlRenderer
-  defdelegate em(text), to: HtmlRenderer
-  defdelegate strong(text), to: HtmlRenderer
-  defdelegate strikethrough(text), to: HtmlRenderer
-
-  defdelegate link(url, text), to: HtmlRenderer
-  defdelegate link(url, text, title), to: HtmlRenderer
-
-  defdelegate image(path, alt, title), to: HtmlRenderer
-
-  defdelegate footnote_link(ref, backref, number), to: HtmlRenderer
-
-  # Table rows
-  defp add_trs(context, rows, tag, aligns, lnb) do
-    numbered_rows =
-      rows
-      |> Enum.zip(Stream.iterate(lnb, &(&1 + 1)))
-
-    numbered_rows
-    |> Enum.reduce(context, fn {row, lnb}, ctx ->
-      append(add_tds(append(ctx, "<tr>"), row, tag, aligns, lnb), "</tr>")
-    end)
-  end
-
-  defp add_tds(context, row, tag, aligns, lnb) do
-    Enum.reduce(1..length(row), context, add_td_fn(row, tag, aligns, lnb))
-  end
-
-  defp add_td_fn(row, tag, aligns, lnb) do
-    fn n, ctx ->
-      style =
-        case Enum.at(aligns, n - 1, :default) do
-          :default -> ""
-          align -> " style=\"text-align: #{align}\""
-        end
-
-      col = Enum.at(row, n - 1)
-      converted = convert(col, lnb, set_messages(ctx, []))
-      append(add_messages_from(ctx, converted), "<#{tag}#{style}>#{converted.value}</#{tag}>")
-    end
-  end
-
-  ###############################
-  # Append Footnote Return Link #
-  ###############################
-
-  defdelegate append_footnote_link(note), to: HtmlRenderer
-  defdelegate append_footnote_link(note, fnlink), to: HtmlRenderer
-
-  defdelegate render_code(lines), to: HtmlRenderer
-
-  defp code_classes(language, prefix) do
-    ["" | String.split(prefix || "")]
-    |> Enum.map(fn pfx -> "#{pfx}#{language}" end)
-    |> Enum.join(" ")
-  end
-end
diff --git a/lib/pleroma/ecto_enums.ex b/lib/pleroma/ecto_enums.ex
index f198cccb7..2a9addabc 100644
--- a/lib/pleroma/ecto_enums.ex
+++ b/lib/pleroma/ecto_enums.ex
@@ -17,3 +17,11 @@ defenum(Pleroma.FollowingRelationship.State,
   follow_accept: 2,
   follow_reject: 3
 )
+
+defenum(Pleroma.DataMigration.State,
+  pending: 1,
+  running: 2,
+  complete: 3,
+  failed: 4,
+  manual: 5
+)
diff --git a/lib/pleroma/ecto_type/activity_pub/object_validators/recipients.ex b/lib/pleroma/ecto_type/activity_pub/object_validators/recipients.ex
index af4b0e527..06fed8fb3 100644
--- a/lib/pleroma/ecto_type/activity_pub/object_validators/recipients.ex
+++ b/lib/pleroma/ecto_type/activity_pub/object_validators/recipients.ex
@@ -13,21 +13,33 @@ defmodule Pleroma.EctoType.ActivityPub.ObjectValidators.Recipients do
     cast([object])
   end
 
+  def cast(object) when is_map(object) do
+    case ObjectID.cast(object) do
+      {:ok, data} -> {:ok, [data]}
+      _ -> :error
+    end
+  end
+
   def cast(data) when is_list(data) do
-    data
-    |> Enum.reduce_while({:ok, []}, fn element, {:ok, list} ->
-      case ObjectID.cast(element) do
-        {:ok, id} ->
-          {:cont, {:ok, [id | list]}}
-
-        _ ->
-          {:halt, :error}
-      end
-    end)
+    data =
+      data
+      |> Enum.reduce_while([], fn element, list ->
+        case ObjectID.cast(element) do
+          {:ok, id} ->
+            {:cont, [id | list]}
+
+          _ ->
+            {:cont, list}
+        end
+      end)
+      |> Enum.sort()
+      |> Enum.uniq()
+
+    {:ok, data}
   end
 
-  def cast(_) do
-    :error
+  def cast(data) do
+    {:error, data}
   end
 
   def dump(data) do
diff --git a/lib/pleroma/emails/admin_email.ex b/lib/pleroma/emails/admin_email.ex
index 5fe74e2f7..88bc78aec 100644
--- a/lib/pleroma/emails/admin_email.ex
+++ b/lib/pleroma/emails/admin_email.ex
@@ -73,7 +73,7 @@ defmodule Pleroma.Emails.AdminEmail do
     #{comment_html}
     #{statuses_html}
     <p>
-    <a href="#{Pleroma.Web.base_url()}/pleroma/admin/#/reports/index">View Reports in AdminFE</a>
+    <a href="#{Pleroma.Web.Endpoint.url()}/pleroma/admin/#/reports/index">View Reports in AdminFE</a>
     """
 
     new()
@@ -87,7 +87,7 @@ defmodule Pleroma.Emails.AdminEmail do
     html_body = """
     <p>New account for review: <a href="#{account.ap_id}">@#{account.nickname}</a></p>
     <blockquote>#{HTML.strip_tags(account.registration_reason)}</blockquote>
-    <a href="#{Pleroma.Web.base_url()}/pleroma/admin/#/users/#{account.id}/">Visit AdminFE</a>
+    <a href="#{Pleroma.Web.Endpoint.url()}/pleroma/admin/#/users/#{account.id}/">Visit AdminFE</a>
     """
 
     new()
diff --git a/lib/pleroma/emails/user_email.ex b/lib/pleroma/emails/user_email.ex
index 52f3d419d..e38c681ba 100644
--- a/lib/pleroma/emails/user_email.ex
+++ b/lib/pleroma/emails/user_email.ex
@@ -5,15 +5,22 @@
 defmodule Pleroma.Emails.UserEmail do
   @moduledoc "User emails"
 
-  use Phoenix.Swoosh, view: Pleroma.Web.EmailView, layout: {Pleroma.Web.LayoutView, :email}
-
   alias Pleroma.Config
   alias Pleroma.User
   alias Pleroma.Web.Endpoint
   alias Pleroma.Web.Router
 
+  import Swoosh.Email
+  import Phoenix.Swoosh, except: [render_body: 3]
   import Pleroma.Config.Helpers, only: [instance_name: 0, sender: 0]
 
+  def render_body(email, template, assigns \\ %{}) do
+    email
+    |> put_new_layout({Pleroma.Web.LayoutView, :email})
+    |> put_new_view(Pleroma.Web.EmailView)
+    |> Phoenix.Swoosh.render_body(template, assigns)
+  end
+
   defp recipient(email, nil), do: email
   defp recipient(email, name), do: {name, email}
   defp recipient(%User{} = user), do: recipient(user.email, user.name)
diff --git a/lib/pleroma/emoji/formatter.ex b/lib/pleroma/emoji/formatter.ex
index 50150e951..191451952 100644
--- a/lib/pleroma/emoji/formatter.ex
+++ b/lib/pleroma/emoji/formatter.ex
@@ -5,7 +5,7 @@
 defmodule Pleroma.Emoji.Formatter do
   alias Pleroma.Emoji
   alias Pleroma.HTML
-  alias Pleroma.Web
+  alias Pleroma.Web.Endpoint
   alias Pleroma.Web.MediaProxy
 
   def emojify(text) do
@@ -44,7 +44,7 @@ defmodule Pleroma.Emoji.Formatter do
     Emoji.get_all()
     |> Enum.filter(fn {emoji, %Emoji{}} -> String.contains?(text, ":#{emoji}:") end)
     |> Enum.reduce(%{}, fn {name, %Emoji{file: file}}, acc ->
-      Map.put(acc, name, to_string(URI.merge(Web.base_url(), file)))
+      Map.put(acc, name, to_string(URI.merge(Endpoint.url(), file)))
     end)
   end
 
diff --git a/lib/pleroma/formatter.ex b/lib/pleroma/formatter.ex
index 7a08e48a9..ae37946ab 100644
--- a/lib/pleroma/formatter.ex
+++ b/lib/pleroma/formatter.ex
@@ -62,7 +62,7 @@ defmodule Pleroma.Formatter do
 
   def hashtag_handler("#" <> tag = tag_text, _buffer, _opts, acc) do
     tag = String.downcase(tag)
-    url = "#{Pleroma.Web.base_url()}/tag/#{tag}"
+    url = "#{Pleroma.Web.Endpoint.url()}/tag/#{tag}"
 
     link =
       Phoenix.HTML.Tag.content_tag(:a, tag_text,
@@ -121,6 +121,10 @@ defmodule Pleroma.Formatter do
     end
   end
 
+  def markdown_to_html(text) do
+    Earmark.as_html!(text, %Earmark.Options{compact_output: true})
+  end
+
   def html_escape({text, mentions, hashtags}, type) do
     {html_escape(text, type), mentions, hashtags}
   end
diff --git a/lib/pleroma/gun.ex b/lib/pleroma/gun.ex
index f9c828fac..bef1c9872 100644
--- a/lib/pleroma/gun.ex
+++ b/lib/pleroma/gun.ex
@@ -11,9 +11,7 @@ defmodule Pleroma.Gun do
   @callback await(pid(), reference()) :: {:response, :fin, 200, []}
   @callback set_owner(pid(), pid()) :: :ok
 
-  @api Pleroma.Config.get([Pleroma.Gun], Pleroma.Gun.API)
-
-  defp api, do: @api
+  defp api, do: Pleroma.Config.get([Pleroma.Gun], Pleroma.Gun.API)
 
   def open(host, port, opts), do: api().open(host, port, opts)
 
diff --git a/lib/pleroma/gun/connection_pool/reclaimer.ex b/lib/pleroma/gun/connection_pool/reclaimer.ex
index c37b62bf2..4c643d7cb 100644
--- a/lib/pleroma/gun/connection_pool/reclaimer.ex
+++ b/lib/pleroma/gun/connection_pool/reclaimer.ex
@@ -5,11 +5,11 @@
 defmodule Pleroma.Gun.ConnectionPool.Reclaimer do
   use GenServer, restart: :temporary
 
-  @registry Pleroma.Gun.ConnectionPool
+  defp registry, do: Pleroma.Gun.ConnectionPool
 
   def start_monitor do
     pid =
-      case :gen_server.start(__MODULE__, [], name: {:via, Registry, {@registry, "reclaimer"}}) do
+      case :gen_server.start(__MODULE__, [], name: {:via, Registry, {registry(), "reclaimer"}}) do
         {:ok, pid} ->
           pid
 
@@ -46,7 +46,7 @@ defmodule Pleroma.Gun.ConnectionPool.Reclaimer do
     #   {worker_pid, crf, last_reference} end)
     unused_conns =
       Registry.select(
-        @registry,
+        registry(),
         [
           {{:_, :"$1", {:_, :"$2", :"$3", :"$4"}}, [{:==, :"$2", []}], [{{:"$1", :"$3", :"$4"}}]}
         ]
diff --git a/lib/pleroma/gun/connection_pool/worker.ex b/lib/pleroma/gun/connection_pool/worker.ex
index 02bfff274..a3fa75386 100644
--- a/lib/pleroma/gun/connection_pool/worker.ex
+++ b/lib/pleroma/gun/connection_pool/worker.ex
@@ -6,10 +6,10 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
   alias Pleroma.Gun
   use GenServer, restart: :temporary
 
-  @registry Pleroma.Gun.ConnectionPool
+  defp registry, do: Pleroma.Gun.ConnectionPool
 
   def start_link([key | _] = opts) do
-    GenServer.start_link(__MODULE__, opts, name: {:via, Registry, {@registry, key}})
+    GenServer.start_link(__MODULE__, opts, name: {:via, Registry, {registry(), key}})
   end
 
   @impl true
@@ -24,7 +24,7 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
       time = :erlang.monotonic_time(:millisecond)
 
       {_, _} =
-        Registry.update_value(@registry, key, fn _ ->
+        Registry.update_value(registry(), key, fn _ ->
           {conn_pid, [client_pid], 1, time}
         end)
 
@@ -65,7 +65,7 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
     time = :erlang.monotonic_time(:millisecond)
 
     {{conn_pid, used_by, _, _}, _} =
-      Registry.update_value(@registry, key, fn {conn_pid, used_by, crf, last_reference} ->
+      Registry.update_value(registry(), key, fn {conn_pid, used_by, crf, last_reference} ->
         {conn_pid, [client_pid | used_by], crf(time - last_reference, crf), time}
       end)
 
@@ -92,7 +92,7 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
   @impl true
   def handle_call(:remove_client, {client_pid, _}, %{key: key} = state) do
     {{_conn_pid, used_by, _crf, _last_reference}, _} =
-      Registry.update_value(@registry, key, fn {conn_pid, used_by, crf, last_reference} ->
+      Registry.update_value(registry(), key, fn {conn_pid, used_by, crf, last_reference} ->
         {conn_pid, List.delete(used_by, client_pid), crf, last_reference}
       end)
 
diff --git a/lib/pleroma/hashtag.ex b/lib/pleroma/hashtag.ex
new file mode 100644
index 000000000..53e2e9c89
--- /dev/null
+++ b/lib/pleroma/hashtag.ex
@@ -0,0 +1,106 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Hashtag do
+  use Ecto.Schema
+
+  import Ecto.Changeset
+  import Ecto.Query
+
+  alias Ecto.Multi
+  alias Pleroma.Hashtag
+  alias Pleroma.Object
+  alias Pleroma.Repo
+
+  schema "hashtags" do
+    field(:name, :string)
+
+    many_to_many(:objects, Object, join_through: "hashtags_objects", on_replace: :delete)
+
+    timestamps()
+  end
+
+  def normalize_name(name) do
+    name
+    |> String.downcase()
+    |> String.trim()
+  end
+
+  def get_or_create_by_name(name) do
+    changeset = changeset(%Hashtag{}, %{name: name})
+
+    Repo.insert(
+      changeset,
+      on_conflict: [set: [name: get_field(changeset, :name)]],
+      conflict_target: :name,
+      returning: true
+    )
+  end
+
+  def get_or_create_by_names(names) when is_list(names) do
+    names = Enum.map(names, &normalize_name/1)
+    timestamp = NaiveDateTime.truncate(NaiveDateTime.utc_now(), :second)
+
+    structs =
+      Enum.map(names, fn name ->
+        %Hashtag{}
+        |> changeset(%{name: name})
+        |> Map.get(:changes)
+        |> Map.merge(%{inserted_at: timestamp, updated_at: timestamp})
+      end)
+
+    try do
+      with {:ok, %{query_op: hashtags}} <-
+             Multi.new()
+             |> Multi.insert_all(:insert_all_op, Hashtag, structs,
+               on_conflict: :nothing,
+               conflict_target: :name
+             )
+             |> Multi.run(:query_op, fn _repo, _changes ->
+               {:ok, Repo.all(from(ht in Hashtag, where: ht.name in ^names))}
+             end)
+             |> Repo.transaction() do
+        {:ok, hashtags}
+      else
+        {:error, _name, value, _changes_so_far} -> {:error, value}
+      end
+    rescue
+      e -> {:error, e}
+    end
+  end
+
+  def changeset(%Hashtag{} = struct, params) do
+    struct
+    |> cast(params, [:name])
+    |> update_change(:name, &normalize_name/1)
+    |> validate_required([:name])
+    |> unique_constraint(:name)
+  end
+
+  def unlink(%Object{id: object_id}) do
+    with {_, hashtag_ids} <-
+           from(hto in "hashtags_objects",
+             where: hto.object_id == ^object_id,
+             select: hto.hashtag_id
+           )
+           |> Repo.delete_all(),
+         {:ok, unreferenced_count} <- delete_unreferenced(hashtag_ids) do
+      {:ok, length(hashtag_ids), unreferenced_count}
+    end
+  end
+
+  @delete_unreferenced_query """
+  DELETE FROM hashtags WHERE id IN
+    (SELECT hashtags.id FROM hashtags
+      LEFT OUTER JOIN hashtags_objects
+        ON hashtags_objects.hashtag_id = hashtags.id
+      WHERE hashtags_objects.hashtag_id IS NULL AND hashtags.id = ANY($1));
+  """
+
+  def delete_unreferenced(ids) do
+    with {:ok, %{num_rows: deleted_count}} <- Repo.query(@delete_unreferenced_query, [ids]) do
+      {:ok, deleted_count}
+    end
+  end
+end
diff --git a/lib/pleroma/html.ex b/lib/pleroma/html.ex
index 2dfdca693..bee66169d 100644
--- a/lib/pleroma/html.ex
+++ b/lib/pleroma/html.ex
@@ -49,31 +49,6 @@ defmodule Pleroma.HTML do
   def filter_tags(html), do: filter_tags(html, nil)
   def strip_tags(html), do: filter_tags(html, FastSanitize.Sanitizer.StripTags)
 
-  def get_cached_scrubbed_html_for_activity(
-        content,
-        scrubbers,
-        activity,
-        key \\ "",
-        callback \\ fn x -> x end
-      ) do
-    key = "#{key}#{generate_scrubber_signature(scrubbers)}|#{activity.id}"
-
-    @cachex.fetch!(:scrubber_cache, key, fn _key ->
-      object = Pleroma.Object.normalize(activity, fetch: false)
-      ensure_scrubbed_html(content, scrubbers, object.data["fake"] || false, callback)
-    end)
-  end
-
-  def get_cached_stripped_html_for_activity(content, activity, key) do
-    get_cached_scrubbed_html_for_activity(
-      content,
-      FastSanitize.Sanitizer.StripTags,
-      activity,
-      key,
-      &HtmlEntities.decode/1
-    )
-  end
-
   def ensure_scrubbed_html(
         content,
         scrubbers,
@@ -92,16 +67,6 @@ defmodule Pleroma.HTML do
     end
   end
 
-  defp generate_scrubber_signature(scrubber) when is_atom(scrubber) do
-    generate_scrubber_signature([scrubber])
-  end
-
-  defp generate_scrubber_signature(scrubbers) do
-    Enum.reduce(scrubbers, "", fn scrubber, signature ->
-      "#{signature}#{to_string(scrubber)}"
-    end)
-  end
-
   def extract_first_external_url_from_object(%{data: %{"content" => content}} = object)
       when is_binary(content) do
     unless object.data["fake"] do
diff --git a/lib/pleroma/http/adapter_helper/gun.ex b/lib/pleroma/http/adapter_helper/gun.ex
index 82c7fd654..251539f34 100644
--- a/lib/pleroma/http/adapter_helper/gun.ex
+++ b/lib/pleroma/http/adapter_helper/gun.ex
@@ -54,8 +54,8 @@ defmodule Pleroma.HTTP.AdapterHelper.Gun do
     Config.get([:pools, pool, :recv_timeout], default)
   end
 
-  @prefix Pleroma.Gun.ConnectionPool
   def limiter_setup do
+    prefix = Pleroma.Gun.ConnectionPool
     wait = Config.get([:connections_pool, :connection_acquisition_wait])
     retries = Config.get([:connections_pool, :connection_acquisition_retries])
 
@@ -66,7 +66,7 @@ defmodule Pleroma.HTTP.AdapterHelper.Gun do
       max_waiting = Keyword.get(opts, :max_waiting, 10)
 
       result =
-        ConcurrentLimiter.new(:"#{@prefix}.#{name}", max_running, max_waiting,
+        ConcurrentLimiter.new(:"#{prefix}.#{name}", max_running, max_waiting,
           wait: wait,
           max_retries: retries
         )
diff --git a/lib/pleroma/http/web_push.ex b/lib/pleroma/http/web_push.ex
index 51f72fbf8..16bbe6e8c 100644
--- a/lib/pleroma/http/web_push.ex
+++ b/lib/pleroma/http/web_push.ex
@@ -5,8 +5,8 @@
 defmodule Pleroma.HTTP.WebPush do
   @moduledoc false
 
-  def post(url, payload, headers) do
+  def post(url, payload, headers, options \\ []) do
     list_headers = Map.to_list(headers)
-    Pleroma.HTTP.post(url, payload, list_headers)
+    Pleroma.HTTP.post(url, payload, list_headers, options)
   end
 end
diff --git a/lib/pleroma/maps.ex b/lib/pleroma/maps.ex
index 0d2e94248..b08b83305 100644
--- a/lib/pleroma/maps.ex
+++ b/lib/pleroma/maps.ex
@@ -12,4 +12,10 @@ defmodule Pleroma.Maps do
       _ -> map
     end
   end
+
+  def safe_put_in(data, keys, value) when is_map(data) and is_list(keys) do
+    Kernel.put_in(data, keys, value)
+  rescue
+    _ -> data
+  end
 end
diff --git a/lib/pleroma/migrators/hashtags_table_migrator.ex b/lib/pleroma/migrators/hashtags_table_migrator.ex
new file mode 100644
index 000000000..b84058e11
--- /dev/null
+++ b/lib/pleroma/migrators/hashtags_table_migrator.ex
@@ -0,0 +1,208 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Migrators.HashtagsTableMigrator do
+  defmodule State do
+    use Pleroma.Migrators.Support.BaseMigratorState
+
+    @impl Pleroma.Migrators.Support.BaseMigratorState
+    defdelegate data_migration(), to: Pleroma.DataMigration, as: :populate_hashtags_table
+  end
+
+  use Pleroma.Migrators.Support.BaseMigrator
+
+  alias Pleroma.Hashtag
+  alias Pleroma.Migrators.Support.BaseMigrator
+  alias Pleroma.Object
+
+  @impl BaseMigrator
+  def feature_config_path, do: [:features, :improved_hashtag_timeline]
+
+  @impl BaseMigrator
+  def fault_rate_allowance, do: Config.get([:populate_hashtags_table, :fault_rate_allowance], 0)
+
+  @impl BaseMigrator
+  def perform do
+    data_migration_id = data_migration_id()
+    max_processed_id = get_stat(:max_processed_id, 0)
+
+    Logger.info("Transferring embedded hashtags to `hashtags` (from oid: #{max_processed_id})...")
+
+    query()
+    |> where([object], object.id > ^max_processed_id)
+    |> Repo.chunk_stream(100, :batches, timeout: :infinity)
+    |> Stream.each(fn objects ->
+      object_ids = Enum.map(objects, & &1.id)
+
+      results = Enum.map(objects, &transfer_object_hashtags(&1))
+
+      failed_ids =
+        results
+        |> Enum.filter(&(elem(&1, 0) == :error))
+        |> Enum.map(&elem(&1, 1))
+
+      # Count of objects with hashtags: `{:noop, id}` is returned for objects having other AS2 tags
+      chunk_affected_count =
+        results
+        |> Enum.filter(&(elem(&1, 0) == :ok))
+        |> length()
+
+      for failed_id <- failed_ids do
+        _ =
+          Repo.query(
+            "INSERT INTO data_migration_failed_ids(data_migration_id, record_id) " <>
+              "VALUES ($1, $2) ON CONFLICT DO NOTHING;",
+            [data_migration_id, failed_id]
+          )
+      end
+
+      _ =
+        Repo.query(
+          "DELETE FROM data_migration_failed_ids " <>
+            "WHERE data_migration_id = $1 AND record_id = ANY($2)",
+          [data_migration_id, object_ids -- failed_ids]
+        )
+
+      max_object_id = Enum.at(object_ids, -1)
+
+      put_stat(:max_processed_id, max_object_id)
+      increment_stat(:iteration_processed_count, length(object_ids))
+      increment_stat(:processed_count, length(object_ids))
+      increment_stat(:failed_count, length(failed_ids))
+      increment_stat(:affected_count, chunk_affected_count)
+      put_stat(:records_per_second, records_per_second())
+      persist_state()
+
+      # A quick and dirty approach to controlling the load this background migration imposes
+      sleep_interval = Config.get([:populate_hashtags_table, :sleep_interval_ms], 0)
+      Process.sleep(sleep_interval)
+    end)
+    |> Stream.run()
+  end
+
+  @impl BaseMigrator
+  def query do
+    # Note: most objects have Mention-type AS2 tags and no hashtags (but we can't filter them out)
+    # Note: not checking activity type, expecting remove_non_create_objects_hashtags/_ to clean up
+    from(
+      object in Object,
+      where:
+        fragment("(?)->'tag' IS NOT NULL AND (?)->'tag' != '[]'::jsonb", object.data, object.data),
+      select: %{
+        id: object.id,
+        tag: fragment("(?)->'tag'", object.data)
+      }
+    )
+    |> join(:left, [o], hashtags_objects in fragment("SELECT object_id FROM hashtags_objects"),
+      on: hashtags_objects.object_id == o.id
+    )
+    |> where([_o, hashtags_objects], is_nil(hashtags_objects.object_id))
+  end
+
+  @spec transfer_object_hashtags(Map.t()) :: {:noop | :ok | :error, integer()}
+  defp transfer_object_hashtags(object) do
+    embedded_tags = if Map.has_key?(object, :tag), do: object.tag, else: object.data["tag"]
+    hashtags = Object.object_data_hashtags(%{"tag" => embedded_tags})
+
+    if Enum.any?(hashtags) do
+      transfer_object_hashtags(object, hashtags)
+    else
+      {:noop, object.id}
+    end
+  end
+
+  defp transfer_object_hashtags(object, hashtags) do
+    Repo.transaction(fn ->
+      with {:ok, hashtag_records} <- Hashtag.get_or_create_by_names(hashtags) do
+        maps = Enum.map(hashtag_records, &%{hashtag_id: &1.id, object_id: object.id})
+        base_error = "ERROR when inserting hashtags_objects for object with id #{object.id}"
+
+        try do
+          with {rows_count, _} when is_integer(rows_count) <-
+                 Repo.insert_all("hashtags_objects", maps, on_conflict: :nothing) do
+            object.id
+          else
+            e ->
+              Logger.error("#{base_error}: #{inspect(e)}")
+              Repo.rollback(object.id)
+          end
+        rescue
+          e ->
+            Logger.error("#{base_error}: #{inspect(e)}")
+            Repo.rollback(object.id)
+        end
+      else
+        e ->
+          error = "ERROR: could not create hashtags for object #{object.id}: #{inspect(e)}"
+          Logger.error(error)
+          Repo.rollback(object.id)
+      end
+    end)
+  end
+
+  @impl BaseMigrator
+  def retry_failed do
+    data_migration_id = data_migration_id()
+
+    failed_objects_query()
+    |> Repo.chunk_stream(100, :one)
+    |> Stream.each(fn object ->
+      with {res, _} when res != :error <- transfer_object_hashtags(object) do
+        _ =
+          Repo.query(
+            "DELETE FROM data_migration_failed_ids " <>
+              "WHERE data_migration_id = $1 AND record_id = $2",
+            [data_migration_id, object.id]
+          )
+      end
+    end)
+    |> Stream.run()
+
+    put_stat(:failed_count, failures_count())
+    persist_state()
+
+    force_continue()
+  end
+
+  defp failed_objects_query do
+    from(o in Object)
+    |> join(:inner, [o], dmf in fragment("SELECT * FROM data_migration_failed_ids"),
+      on: dmf.record_id == o.id
+    )
+    |> where([_o, dmf], dmf.data_migration_id == ^data_migration_id())
+    |> order_by([o], asc: o.id)
+  end
+
+  @doc """
+  Service func to delete `hashtags_objects` for legacy objects not associated with Create activity.
+  Also deletes unreferenced `hashtags` records (might occur after deletion of `hashtags_objects`).
+  """
+  def delete_non_create_activities_hashtags do
+    hashtags_objects_cleanup_query = """
+    DELETE FROM hashtags_objects WHERE object_id IN
+      (SELECT DISTINCT objects.id FROM objects
+        JOIN hashtags_objects ON hashtags_objects.object_id = objects.id LEFT JOIN activities
+          ON COALESCE(activities.data->'object'->>'id', activities.data->>'object') =
+            (objects.data->>'id')
+          AND activities.data->>'type' = 'Create'
+        WHERE activities.id IS NULL);
+    """
+
+    hashtags_cleanup_query = """
+    DELETE FROM hashtags WHERE id IN
+      (SELECT hashtags.id FROM hashtags
+        LEFT OUTER JOIN hashtags_objects
+          ON hashtags_objects.hashtag_id = hashtags.id
+        WHERE hashtags_objects.hashtag_id IS NULL);
+    """
+
+    {:ok, %{num_rows: hashtags_objects_count}} =
+      Repo.query(hashtags_objects_cleanup_query, [], timeout: :infinity)
+
+    {:ok, %{num_rows: hashtags_count}} =
+      Repo.query(hashtags_cleanup_query, [], timeout: :infinity)
+
+    {:ok, hashtags_objects_count, hashtags_count}
+  end
+end
diff --git a/lib/pleroma/migrators/support/base_migrator.ex b/lib/pleroma/migrators/support/base_migrator.ex
new file mode 100644
index 000000000..1f8a5402b
--- /dev/null
+++ b/lib/pleroma/migrators/support/base_migrator.ex
@@ -0,0 +1,210 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Migrators.Support.BaseMigrator do
+  @moduledoc """
+  Base background migrator functionality.
+  """
+
+  @callback perform() :: any()
+  @callback retry_failed() :: any()
+  @callback feature_config_path() :: list(atom())
+  @callback query() :: Ecto.Query.t()
+  @callback fault_rate_allowance() :: integer() | float()
+
+  defmacro __using__(_opts) do
+    quote do
+      use GenServer
+
+      require Logger
+
+      import Ecto.Query
+
+      alias __MODULE__.State
+      alias Pleroma.Config
+      alias Pleroma.Repo
+
+      @behaviour Pleroma.Migrators.Support.BaseMigrator
+
+      defdelegate data_migration(), to: State
+      defdelegate data_migration_id(), to: State
+      defdelegate state(), to: State
+      defdelegate persist_state(), to: State, as: :persist_to_db
+      defdelegate get_stat(key, value \\ nil), to: State, as: :get_data_key
+      defdelegate put_stat(key, value), to: State, as: :put_data_key
+      defdelegate increment_stat(key, increment), to: State, as: :increment_data_key
+
+      @reg_name {:global, __MODULE__}
+
+      def whereis, do: GenServer.whereis(@reg_name)
+
+      def start_link(_) do
+        case whereis() do
+          nil ->
+            GenServer.start_link(__MODULE__, nil, name: @reg_name)
+
+          pid ->
+            {:ok, pid}
+        end
+      end
+
+      @impl true
+      def init(_) do
+        {:ok, nil, {:continue, :init_state}}
+      end
+
+      @impl true
+      def handle_continue(:init_state, _state) do
+        {:ok, _} = State.start_link(nil)
+
+        data_migration = data_migration()
+        manual_migrations = Config.get([:instance, :manual_data_migrations], [])
+
+        cond do
+          Config.get(:env) == :test ->
+            update_status(:noop)
+
+          is_nil(data_migration) ->
+            message = "Data migration does not exist."
+            update_status(:failed, message)
+            Logger.error("#{__MODULE__}: #{message}")
+
+          data_migration.state == :manual or data_migration.name in manual_migrations ->
+            message = "Data migration is in manual execution or manual fix mode."
+            update_status(:manual, message)
+            Logger.warn("#{__MODULE__}: #{message}")
+
+          data_migration.state == :complete ->
+            on_complete(data_migration)
+
+          true ->
+            send(self(), :perform)
+        end
+
+        {:noreply, nil}
+      end
+
+      @impl true
+      def handle_info(:perform, state) do
+        State.reinit()
+
+        update_status(:running)
+        put_stat(:iteration_processed_count, 0)
+        put_stat(:started_at, NaiveDateTime.utc_now())
+
+        perform()
+
+        fault_rate = fault_rate()
+        put_stat(:fault_rate, fault_rate)
+        fault_rate_allowance = fault_rate_allowance()
+
+        cond do
+          fault_rate == 0 ->
+            set_complete()
+
+          is_float(fault_rate) and fault_rate <= fault_rate_allowance ->
+            message = """
+            Done with fault rate of #{fault_rate} which doesn't exceed #{fault_rate_allowance}.
+            Putting data migration to manual fix mode. Try running `#{__MODULE__}.retry_failed/0`.
+            """
+
+            Logger.warn("#{__MODULE__}: #{message}")
+            update_status(:manual, message)
+            on_complete(data_migration())
+
+          true ->
+            message = "Too many failures. Try running `#{__MODULE__}.retry_failed/0`."
+            Logger.error("#{__MODULE__}: #{message}")
+            update_status(:failed, message)
+        end
+
+        persist_state()
+        {:noreply, state}
+      end
+
+      defp on_complete(data_migration) do
+        if data_migration.feature_lock || feature_state() == :disabled do
+          Logger.warn(
+            "#{__MODULE__}: migration complete but feature is locked; consider enabling."
+          )
+
+          :noop
+        else
+          Config.put(feature_config_path(), :enabled)
+          :ok
+        end
+      end
+
+      @doc "Approximate count for current iteration (including processed records count)"
+      def count(force \\ false, timeout \\ :infinity) do
+        stored_count = get_stat(:count)
+
+        if stored_count && !force do
+          stored_count
+        else
+          processed_count = get_stat(:processed_count, 0)
+          max_processed_id = get_stat(:max_processed_id, 0)
+          query = where(query(), [entity], entity.id > ^max_processed_id)
+
+          count = Repo.aggregate(query, :count, :id, timeout: timeout) + processed_count
+          put_stat(:count, count)
+          persist_state()
+
+          count
+        end
+      end
+
+      def failures_count do
+        with {:ok, %{rows: [[count]]}} <-
+               Repo.query(
+                 "SELECT COUNT(record_id) FROM data_migration_failed_ids WHERE data_migration_id = $1;",
+                 [data_migration_id()]
+               ) do
+          count
+        end
+      end
+
+      def feature_state, do: Config.get(feature_config_path())
+
+      def force_continue do
+        send(whereis(), :perform)
+      end
+
+      def force_restart do
+        :ok = State.reset()
+        force_continue()
+      end
+
+      def set_complete do
+        update_status(:complete)
+        persist_state()
+        on_complete(data_migration())
+      end
+
+      defp update_status(status, message \\ nil) do
+        put_stat(:state, status)
+        put_stat(:message, message)
+      end
+
+      defp fault_rate do
+        with failures_count when is_integer(failures_count) <- failures_count() do
+          failures_count / Enum.max([get_stat(:affected_count, 0), 1])
+        else
+          _ -> :error
+        end
+      end
+
+      defp records_per_second do
+        get_stat(:iteration_processed_count, 0) / Enum.max([running_time(), 1])
+      end
+
+      defp running_time do
+        NaiveDateTime.diff(
+          NaiveDateTime.utc_now(),
+          get_stat(:started_at, NaiveDateTime.utc_now())
+        )
+      end
+    end
+  end
+end
diff --git a/lib/pleroma/migrators/support/base_migrator_state.ex b/lib/pleroma/migrators/support/base_migrator_state.ex
new file mode 100644
index 000000000..b698587f2
--- /dev/null
+++ b/lib/pleroma/migrators/support/base_migrator_state.ex
@@ -0,0 +1,117 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Migrators.Support.BaseMigratorState do
+  @moduledoc """
+  Base background migrator state functionality.
+  """
+
+  @callback data_migration() :: Pleroma.DataMigration.t()
+
+  defmacro __using__(_opts) do
+    quote do
+      use Agent
+
+      alias Pleroma.DataMigration
+
+      @behaviour Pleroma.Migrators.Support.BaseMigratorState
+      @reg_name {:global, __MODULE__}
+
+      def start_link(_) do
+        Agent.start_link(fn -> load_state_from_db() end, name: @reg_name)
+      end
+
+      def data_migration, do: raise("data_migration/0 is not implemented")
+      defoverridable data_migration: 0
+
+      defp load_state_from_db do
+        data_migration = data_migration()
+
+        data =
+          if data_migration do
+            Map.new(data_migration.data, fn {k, v} -> {String.to_atom(k), v} end)
+          else
+            %{}
+          end
+
+        %{
+          data_migration_id: data_migration && data_migration.id,
+          data: data
+        }
+      end
+
+      def persist_to_db do
+        %{data_migration_id: data_migration_id, data: data} = state()
+
+        if data_migration_id do
+          DataMigration.update_one_by_id(data_migration_id, data: data)
+        else
+          {:error, :nil_data_migration_id}
+        end
+      end
+
+      def reset do
+        %{data_migration_id: data_migration_id} = state()
+
+        with false <- is_nil(data_migration_id),
+             :ok <-
+               DataMigration.update_one_by_id(data_migration_id,
+                 state: :pending,
+                 data: %{}
+               ) do
+          reinit()
+        else
+          true -> {:error, :nil_data_migration_id}
+          e -> e
+        end
+      end
+
+      def reinit do
+        Agent.update(@reg_name, fn _state -> load_state_from_db() end)
+      end
+
+      def state do
+        Agent.get(@reg_name, & &1)
+      end
+
+      def get_data_key(key, default \\ nil) do
+        get_in(state(), [:data, key]) || default
+      end
+
+      def put_data_key(key, value) do
+        _ = persist_non_data_change(key, value)
+
+        Agent.update(@reg_name, fn state ->
+          put_in(state, [:data, key], value)
+        end)
+      end
+
+      def increment_data_key(key, increment \\ 1) do
+        Agent.update(@reg_name, fn state ->
+          initial_value = get_in(state, [:data, key]) || 0
+          updated_value = initial_value + increment
+          put_in(state, [:data, key], updated_value)
+        end)
+      end
+
+      defp persist_non_data_change(:state, value) do
+        with true <- get_data_key(:state) != value,
+             true <- value in Pleroma.DataMigration.State.__valid_values__(),
+             %{data_migration_id: data_migration_id} when not is_nil(data_migration_id) <-
+               state() do
+          DataMigration.update_one_by_id(data_migration_id, state: value)
+        else
+          false -> :ok
+          _ -> {:error, :nil_data_migration_id}
+        end
+      end
+
+      defp persist_non_data_change(_, _) do
+        nil
+      end
+
+      def data_migration_id, do: Map.get(state(), :data_migration_id)
+    end
+  end
+end
diff --git a/lib/pleroma/object.ex b/lib/pleroma/object.ex
index aaf123840..c3ea1b98b 100644
--- a/lib/pleroma/object.ex
+++ b/lib/pleroma/object.ex
@@ -10,6 +10,7 @@ defmodule Pleroma.Object do
 
   alias Pleroma.Activity
   alias Pleroma.Config
+  alias Pleroma.Hashtag
   alias Pleroma.Object
   alias Pleroma.Object.Fetcher
   alias Pleroma.ObjectTombstone
@@ -28,6 +29,8 @@ defmodule Pleroma.Object do
   schema "objects" do
     field(:data, :map)
 
+    many_to_many(:hashtags, Hashtag, join_through: "hashtags_objects", on_replace: :delete)
+
     timestamps()
   end
 
@@ -49,7 +52,8 @@ defmodule Pleroma.Object do
   end
 
   def create(data) do
-    Object.change(%Object{}, %{data: data})
+    %Object{}
+    |> Object.change(%{data: data})
     |> Repo.insert()
   end
 
@@ -58,8 +62,41 @@ defmodule Pleroma.Object do
     |> cast(params, [:data])
     |> validate_required([:data])
     |> unique_constraint(:ap_id, name: :objects_unique_apid_index)
+    # Expecting `maybe_handle_hashtags_change/1` to run last:
+    |> maybe_handle_hashtags_change(struct)
+  end
+
+  # Note: not checking activity type (assuming non-legacy objects are associated with Create act.)
+  defp maybe_handle_hashtags_change(changeset, struct) do
+    with %Ecto.Changeset{valid?: true} <- changeset,
+         data_hashtags_change = get_change(changeset, :data),
+         {_, true} <- {:changed, hashtags_changed?(struct, data_hashtags_change)},
+         {:ok, hashtag_records} <-
+           data_hashtags_change
+           |> object_data_hashtags()
+           |> Hashtag.get_or_create_by_names() do
+      put_assoc(changeset, :hashtags, hashtag_records)
+    else
+      %{valid?: false} ->
+        changeset
+
+      {:changed, false} ->
+        changeset
+
+      {:error, _} ->
+        validate_change(changeset, :data, fn _, _ ->
+          [data: "error referencing hashtags"]
+        end)
+    end
+  end
+
+  defp hashtags_changed?(%Object{} = struct, %{"tag" => _} = data) do
+    Enum.sort(embedded_hashtags(struct)) !=
+      Enum.sort(object_data_hashtags(data))
   end
 
+  defp hashtags_changed?(_, _), do: false
+
   def get_by_id(nil), do: nil
   def get_by_id(id), do: Repo.get(Object, id)
 
@@ -187,9 +224,13 @@ defmodule Pleroma.Object do
   def swap_object_with_tombstone(object) do
     tombstone = make_tombstone(object)
 
-    object
-    |> Object.change(%{data: tombstone})
-    |> Repo.update()
+    with {:ok, object} <-
+           object
+           |> Object.change(%{data: tombstone})
+           |> Repo.update() do
+      Hashtag.unlink(object)
+      {:ok, object}
+    end
   end
 
   def delete(%Object{data: %{"id" => id}} = object) do
@@ -325,7 +366,7 @@ defmodule Pleroma.Object do
   end
 
   def local?(%Object{data: %{"id" => id}}) do
-    String.starts_with?(id, Pleroma.Web.base_url() <> "/")
+    String.starts_with?(id, Pleroma.Web.Endpoint.url() <> "/")
   end
 
   def replies(object, opts \\ []) do
@@ -349,4 +390,39 @@ defmodule Pleroma.Object do
 
   def self_replies(object, opts \\ []),
     do: replies(object, Keyword.put(opts, :self_only, true))
+
+  def tags(%Object{data: %{"tag" => tags}}) when is_list(tags), do: tags
+
+  def tags(_), do: []
+
+  def hashtags(%Object{} = object) do
+    # Note: always using embedded hashtags regardless whether they are migrated to hashtags table
+    #   (embedded hashtags stay in sync anyways, and we avoid extra joins and preload hassle)
+    embedded_hashtags(object)
+  end
+
+  def embedded_hashtags(%Object{data: data}) do
+    object_data_hashtags(data)
+  end
+
+  def embedded_hashtags(_), do: []
+
+  def object_data_hashtags(%{"tag" => tags}) when is_list(tags) do
+    tags
+    |> Enum.filter(fn
+      %{"type" => "Hashtag"} = data -> Map.has_key?(data, "name")
+      plain_text when is_bitstring(plain_text) -> true
+      _ -> false
+    end)
+    |> Enum.map(fn
+      %{"name" => "#" <> hashtag} -> String.downcase(hashtag)
+      %{"name" => hashtag} -> String.downcase(hashtag)
+      hashtag when is_bitstring(hashtag) -> String.downcase(hashtag)
+    end)
+    |> Enum.uniq()
+    # Note: "" elements (plain text) might occur in `data.tag` for incoming objects
+    |> Enum.filter(&(&1 not in [nil, ""]))
+  end
+
+  def object_data_hashtags(_), do: []
 end
diff --git a/lib/pleroma/object/containment.ex b/lib/pleroma/object/containment.ex
index fb0398f92..040537acf 100644
--- a/lib/pleroma/object/containment.ex
+++ b/lib/pleroma/object/containment.ex
@@ -71,6 +71,14 @@ defmodule Pleroma.Object.Containment do
     compare_uris(id_uri, other_uri)
   end
 
+  # Mastodon pin activities don't have an id, so we check the object field, which will be pinned.
+  def contain_origin_from_id(id, %{"object" => object}) when is_binary(object) do
+    id_uri = URI.parse(id)
+    object_uri = URI.parse(object)
+
+    compare_uris(id_uri, object_uri)
+  end
+
   def contain_origin_from_id(_id, _data), do: :error
 
   def contain_child(%{"object" => %{"id" => id, "attributedTo" => _} = object}),
diff --git a/lib/pleroma/object/fetcher.ex b/lib/pleroma/object/fetcher.ex
index bcccf1c4c..4ca67f0fd 100644
--- a/lib/pleroma/object/fetcher.ex
+++ b/lib/pleroma/object/fetcher.ex
@@ -4,6 +4,7 @@
 
 defmodule Pleroma.Object.Fetcher do
   alias Pleroma.HTTP
+  alias Pleroma.Maps
   alias Pleroma.Object
   alias Pleroma.Object.Containment
   alias Pleroma.Repo
@@ -101,6 +102,9 @@ defmodule Pleroma.Object.Fetcher do
       {:transmogrifier, {:error, {:reject, e}}} ->
         {:reject, e}
 
+      {:transmogrifier, {:reject, e}} ->
+        {:reject, e}
+
       {:transmogrifier, _} = e ->
         {:error, e}
 
@@ -124,12 +128,14 @@ defmodule Pleroma.Object.Fetcher do
   defp prepare_activity_params(data) do
     %{
       "type" => "Create",
-      "to" => data["to"] || [],
-      "cc" => data["cc"] || [],
       # Should we seriously keep this attributedTo thing?
       "actor" => data["actor"] || data["attributedTo"],
       "object" => data
     }
+    |> Maps.put_if_present("to", data["to"])
+    |> Maps.put_if_present("cc", data["cc"])
+    |> Maps.put_if_present("bto", data["bto"])
+    |> Maps.put_if_present("bcc", data["bcc"])
   end
 
   def fetch_object_from_id!(id, options \\ []) do
diff --git a/lib/pleroma/pagination.ex b/lib/pleroma/pagination.ex
index 0d24e1010..33e45a0eb 100644
--- a/lib/pleroma/pagination.ex
+++ b/lib/pleroma/pagination.ex
@@ -93,6 +93,7 @@ defmodule Pleroma.Pagination do
       max_id: :string,
       offset: :integer,
       limit: :integer,
+      skip_extra_order: :boolean,
       skip_order: :boolean
     }
 
@@ -114,6 +115,8 @@ defmodule Pleroma.Pagination do
 
   defp restrict(query, :order, %{skip_order: true}, _), do: query
 
+  defp restrict(%{order_bys: [_ | _]} = query, :order, %{skip_extra_order: true}, _), do: query
+
   defp restrict(query, :order, %{min_id: _}, table_binding) do
     order_by(
       query,
diff --git a/lib/pleroma/repo.ex b/lib/pleroma/repo.ex
index 4556352d0..b8ea06e33 100644
--- a/lib/pleroma/repo.ex
+++ b/lib/pleroma/repo.ex
@@ -8,6 +8,8 @@ defmodule Pleroma.Repo do
     adapter: Ecto.Adapters.Postgres,
     migration_timestamps: [type: :naive_datetime_usec]
 
+  use Ecto.Explain
+
   import Ecto.Query
   require Logger
 
@@ -63,8 +65,8 @@ defmodule Pleroma.Repo do
   iex> Pleroma.Repo.chunk_stream(Pleroma.Activity.Queries.by_actor(ap_id), 500, :batches)
   """
   @spec chunk_stream(Ecto.Query.t(), integer(), atom()) :: Enumerable.t()
-  def chunk_stream(query, chunk_size, returns_as \\ :one) do
-    # We don't actually need start and end funcitons of resource streaming,
+  def chunk_stream(query, chunk_size, returns_as \\ :one, query_options \\ []) do
+    # We don't actually need start and end functions of resource streaming,
     # but it seems to be the only way to not fetch records one-by-one and
     # have individual records be the elements of the stream, instead of
     # lists of records
@@ -76,7 +78,7 @@ defmodule Pleroma.Repo do
           |> order_by(asc: :id)
           |> where([r], r.id > ^last_id)
           |> limit(^chunk_size)
-          |> all()
+          |> all(query_options)
           |> case do
             [] ->
               {:halt, last_id}
diff --git a/lib/pleroma/upload.ex b/lib/pleroma/upload.ex
index 654711351..17822dc5e 100644
--- a/lib/pleroma/upload.ex
+++ b/lib/pleroma/upload.ex
@@ -23,6 +23,9 @@ defmodule Pleroma.Upload do
     is once created permanent and changing it (especially in uploaders) is probably a bad idea!
   * `:tempfile` - path to the temporary file. Prefer in-place changes on the file rather than changing the
   path as the temporary file is also tracked by `Plug.Upload{}` and automatically deleted once the request is over.
+  * `:width` - width of the media in pixels
+  * `:height` - height of the media in pixels
+  * `:blurhash` - string hash of the image encoded with the blurhash algorithm (https://blurha.sh/)
 
   Related behaviors:
 
@@ -32,6 +35,7 @@ defmodule Pleroma.Upload do
   """
   alias Ecto.UUID
   alias Pleroma.Config
+  alias Pleroma.Maps
   require Logger
 
   @type source ::
@@ -53,9 +57,12 @@ defmodule Pleroma.Upload do
           name: String.t(),
           tempfile: String.t(),
           content_type: String.t(),
+          width: integer(),
+          height: integer(),
+          blurhash: String.t(),
           path: String.t()
         }
-  defstruct [:id, :name, :tempfile, :content_type, :path]
+  defstruct [:id, :name, :tempfile, :content_type, :width, :height, :blurhash, :path]
 
   defp get_description(opts, upload) do
     case {opts[:description], Pleroma.Config.get([Pleroma.Upload, :default_description])} do
@@ -89,9 +96,12 @@ defmodule Pleroma.Upload do
              "mediaType" => upload.content_type,
              "href" => url_from_spec(upload, opts.base_url, url_spec)
            }
+           |> Maps.put_if_present("width", upload.width)
+           |> Maps.put_if_present("height", upload.height)
          ],
          "name" => description
-       }}
+       }
+       |> Maps.put_if_present("blurhash", upload.blurhash)}
     else
       {:description_limit, _} ->
         {:error, :description_too_long}
@@ -225,7 +235,7 @@ defmodule Pleroma.Upload do
 
     case uploader do
       Pleroma.Uploaders.Local ->
-        upload_base_url || Pleroma.Web.base_url() <> "/media/"
+        upload_base_url || Pleroma.Web.Endpoint.url() <> "/media/"
 
       Pleroma.Uploaders.S3 ->
         bucket = Config.get([Pleroma.Uploaders.S3, :bucket])
@@ -251,7 +261,7 @@ defmodule Pleroma.Upload do
         end
 
       _ ->
-        public_endpoint || upload_base_url || Pleroma.Web.base_url() <> "/media/"
+        public_endpoint || upload_base_url || Pleroma.Web.Endpoint.url() <> "/media/"
     end
   end
 end
diff --git a/lib/pleroma/upload/filter/analyze_metadata.ex b/lib/pleroma/upload/filter/analyze_metadata.ex
new file mode 100644
index 000000000..8c23076d4
--- /dev/null
+++ b/lib/pleroma/upload/filter/analyze_metadata.ex
@@ -0,0 +1,45 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Upload.Filter.AnalyzeMetadata do
+  @moduledoc """
+  Extracts metadata about the upload, such as width/height
+  """
+  require Logger
+
+  @behaviour Pleroma.Upload.Filter
+
+  @spec filter(Pleroma.Upload.t()) ::
+          {:ok, :filtered, Pleroma.Upload.t()} | {:ok, :noop} | {:error, String.t()}
+  def filter(%Pleroma.Upload{tempfile: file, content_type: "image" <> _} = upload) do
+    try do
+      image =
+        file
+        |> Mogrify.open()
+        |> Mogrify.verbose()
+
+      upload =
+        upload
+        |> Map.put(:width, image.width)
+        |> Map.put(:height, image.height)
+        |> Map.put(:blurhash, get_blurhash(file))
+
+      {:ok, :filtered, upload}
+    rescue
+      e in ErlangError ->
+        Logger.warn("#{__MODULE__}: #{inspect(e)}")
+        {:ok, :noop}
+    end
+  end
+
+  def filter(_), do: {:ok, :noop}
+
+  defp get_blurhash(file) do
+    with {:ok, blurhash} <- :eblurhash.magick(file) do
+      blurhash
+    else
+      _ -> nil
+    end
+  end
+end
diff --git a/lib/pleroma/uploaders/uploader.ex b/lib/pleroma/uploaders/uploader.ex
index 0be878ca2..deba548b7 100644
--- a/lib/pleroma/uploaders/uploader.ex
+++ b/lib/pleroma/uploaders/uploader.ex
@@ -35,7 +35,7 @@ defmodule Pleroma.Uploaders.Uploader do
 
   """
   @type file_spec :: {:file | :url, String.t()}
-  @callback put_file(Pleroma.Upload.t()) ::
+  @callback put_file(upload :: struct()) ::
               :ok | {:ok, file_spec()} | {:error, String.t()} | :wait_callback
 
   @callback delete_file(file :: String.t()) :: :ok | {:error, String.t()}
@@ -46,7 +46,7 @@ defmodule Pleroma.Uploaders.Uploader do
               | {:error, Plug.Conn.t(), String.t()}
   @optional_callbacks http_callback: 2
 
-  @spec put_file(module(), Pleroma.Upload.t()) :: {:ok, file_spec()} | {:error, String.t()}
+  @spec put_file(module(), upload :: struct()) :: {:ok, file_spec()} | {:error, String.t()}
   def put_file(uploader, upload) do
     case uploader.put_file(upload) do
       :ok -> {:ok, {:file, upload.path}}
diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index 9942617d8..9365fae2b 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -27,13 +27,13 @@ defmodule Pleroma.User do
   alias Pleroma.Repo
   alias Pleroma.User
   alias Pleroma.UserRelationship
-  alias Pleroma.Web
   alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Web.ActivityPub.Builder
   alias Pleroma.Web.ActivityPub.Pipeline
   alias Pleroma.Web.ActivityPub.Utils
   alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.CommonAPI.Utils, as: CommonUtils
+  alias Pleroma.Web.Endpoint
   alias Pleroma.Web.OAuth
   alias Pleroma.Web.RelMe
   alias Pleroma.Workers.BackgroundWorker
@@ -99,6 +99,7 @@ defmodule Pleroma.User do
     field(:local, :boolean, default: true)
     field(:follower_address, :string)
     field(:following_address, :string)
+    field(:featured_address, :string)
     field(:search_rank, :float, virtual: true)
     field(:search_type, :integer, virtual: true)
     field(:tags, {:array, :string}, default: [])
@@ -130,7 +131,6 @@ defmodule Pleroma.User do
     field(:hide_followers, :boolean, default: false)
     field(:hide_follows, :boolean, default: false)
     field(:hide_favorites, :boolean, default: true)
-    field(:pinned_activities, {:array, :string}, default: [])
     field(:email_notifications, :map, default: %{"digest" => false})
     field(:mascot, :map, default: nil)
     field(:emoji, :map, default: %{})
@@ -148,6 +148,7 @@ defmodule Pleroma.User do
     field(:accepts_chat_messages, :boolean, default: nil)
     field(:last_active_at, :naive_datetime)
     field(:disclose_client, :boolean, default: true)
+    field(:pinned_objects, :map, default: %{})
 
     embeds_one(
       :notification_settings,
@@ -359,7 +360,7 @@ defmodule Pleroma.User do
 
       _ ->
         unless options[:no_default] do
-          Config.get([:assets, :default_user_avatar], "#{Web.base_url()}/images/avi.png")
+          Config.get([:assets, :default_user_avatar], "#{Endpoint.url()}/images/avi.png")
         end
     end
   end
@@ -367,13 +368,15 @@ defmodule Pleroma.User do
   def banner_url(user, options \\ []) do
     case user.banner do
       %{"url" => [%{"href" => href} | _]} -> href
-      _ -> !options[:no_default] && "#{Web.base_url()}/images/banner.png"
+      _ -> !options[:no_default] && "#{Endpoint.url()}/images/banner.png"
     end
   end
 
   # Should probably be renamed or removed
-  def ap_id(%User{nickname: nickname}), do: "#{Web.base_url()}/users/#{nickname}"
+  @spec ap_id(User.t()) :: String.t()
+  def ap_id(%User{nickname: nickname}), do: "#{Endpoint.url()}/users/#{nickname}"
 
+  @spec ap_followers(User.t()) :: String.t()
   def ap_followers(%User{follower_address: fa}) when is_binary(fa), do: fa
   def ap_followers(%User{} = user), do: "#{ap_id(user)}/followers"
 
@@ -381,6 +384,11 @@ defmodule Pleroma.User do
   def ap_following(%User{following_address: fa}) when is_binary(fa), do: fa
   def ap_following(%User{} = user), do: "#{ap_id(user)}/following"
 
+  @spec ap_featured_collection(User.t()) :: String.t()
+  def ap_featured_collection(%User{featured_address: fa}) when is_binary(fa), do: fa
+
+  def ap_featured_collection(%User{} = user), do: "#{ap_id(user)}/collections/featured"
+
   defp truncate_fields_param(params) do
     if Map.has_key?(params, :fields) do
       Map.put(params, :fields, Enum.map(params[:fields], &truncate_field/1))
@@ -443,6 +451,7 @@ defmodule Pleroma.User do
         :uri,
         :follower_address,
         :following_address,
+        :featured_address,
         :hide_followers,
         :hide_follows,
         :hide_followers_count,
@@ -454,7 +463,8 @@ defmodule Pleroma.User do
         :invisible,
         :actor_type,
         :also_known_as,
-        :accepts_chat_messages
+        :accepts_chat_messages,
+        :pinned_objects
       ]
     )
     |> cast(params, [:name], empty_values: [])
@@ -686,7 +696,7 @@ defmodule Pleroma.User do
     |> validate_format(:nickname, local_nickname_regex())
     |> put_ap_id()
     |> unique_constraint(:ap_id)
-    |> put_following_and_follower_address()
+    |> put_following_and_follower_and_featured_address()
   end
 
   def register_changeset(struct, params \\ %{}, opts \\ []) do
@@ -747,7 +757,7 @@ defmodule Pleroma.User do
     |> put_password_hash
     |> put_ap_id()
     |> unique_constraint(:ap_id)
-    |> put_following_and_follower_address()
+    |> put_following_and_follower_and_featured_address()
   end
 
   def maybe_validate_required_email(changeset, true), do: changeset
@@ -765,11 +775,16 @@ defmodule Pleroma.User do
     put_change(changeset, :ap_id, ap_id)
   end
 
-  defp put_following_and_follower_address(changeset) do
-    followers = ap_followers(%User{nickname: get_field(changeset, :nickname)})
+  defp put_following_and_follower_and_featured_address(changeset) do
+    user = %User{nickname: get_field(changeset, :nickname)}
+    followers = ap_followers(user)
+    following = ap_following(user)
+    featured = ap_featured_collection(user)
 
     changeset
     |> put_change(:follower_address, followers)
+    |> put_change(:following_address, following)
+    |> put_change(:featured_address, featured)
   end
 
   defp autofollow_users(user) do
@@ -2255,13 +2270,6 @@ defmodule Pleroma.User do
     |> update_and_set_cache()
   end
 
-  def roles(%{is_moderator: is_moderator, is_admin: is_admin}) do
-    %{
-      admin: is_admin,
-      moderator: is_moderator
-    }
-  end
-
   def validate_fields(changeset, remote? \\ false) do
     limit_name = if remote?, do: :max_remote_account_fields, else: :max_account_fields
     limit = Config.get([:instance, limit_name], 0)
@@ -2350,45 +2358,35 @@ defmodule Pleroma.User do
     cast(user, %{is_approved: approved?}, [:is_approved])
   end
 
-  def add_pinnned_activity(user, %Pleroma.Activity{id: id}) do
-    if id not in user.pinned_activities do
-      max_pinned_statuses = Config.get([:instance, :max_pinned_statuses], 0)
-      params = %{pinned_activities: user.pinned_activities ++ [id]}
-
-      # if pinned activity was scheduled for deletion, we remove job
-      if expiration = Pleroma.Workers.PurgeExpiredActivity.get_expiration(id) do
-        Oban.cancel_job(expiration.id)
-      end
+  @spec add_pinned_object_id(User.t(), String.t()) :: {:ok, User.t()} | {:error, term()}
+  def add_pinned_object_id(%User{} = user, object_id) do
+    if !user.pinned_objects[object_id] do
+      params = %{pinned_objects: Map.put(user.pinned_objects, object_id, NaiveDateTime.utc_now())}
 
       user
-      |> cast(params, [:pinned_activities])
-      |> validate_length(:pinned_activities,
-        max: max_pinned_statuses,
-        message: "You have already pinned the maximum number of statuses"
-      )
+      |> cast(params, [:pinned_objects])
+      |> validate_change(:pinned_objects, fn :pinned_objects, pinned_objects ->
+        max_pinned_statuses = Config.get([:instance, :max_pinned_statuses], 0)
+
+        if Enum.count(pinned_objects) <= max_pinned_statuses do
+          []
+        else
+          [pinned_objects: "You have already pinned the maximum number of statuses"]
+        end
+      end)
     else
       change(user)
     end
     |> update_and_set_cache()
   end
 
-  def remove_pinnned_activity(user, %Pleroma.Activity{id: id, data: data}) do
-    params = %{pinned_activities: List.delete(user.pinned_activities, id)}
-
-    # if pinned activity was scheduled for deletion, we reschedule it for deletion
-    if data["expires_at"] do
-      # MRF.ActivityExpirationPolicy used UTC timestamps for expires_at in original implementation
-      {:ok, expires_at} =
-        data["expires_at"] |> Pleroma.EctoType.ActivityPub.ObjectValidators.DateTime.cast()
-
-      Pleroma.Workers.PurgeExpiredActivity.enqueue(%{
-        activity_id: id,
-        expires_at: expires_at
-      })
-    end
-
+  @spec remove_pinned_object_id(User.t(), String.t()) :: {:ok, t()} | {:error, term()}
+  def remove_pinned_object_id(%User{} = user, object_id) do
     user
-    |> cast(params, [:pinned_activities])
+    |> cast(
+      %{pinned_objects: Map.delete(user.pinned_objects, object_id)},
+      [:pinned_objects]
+    )
     |> update_and_set_cache()
   end
 
diff --git a/lib/pleroma/utils.ex b/lib/pleroma/utils.ex
index bc0c95332..a446d3ae6 100644
--- a/lib/pleroma/utils.ex
+++ b/lib/pleroma/utils.ex
@@ -11,6 +11,8 @@ defmodule Pleroma.Utils do
     eperm epipe erange erofs espipe esrch estale etxtbsy exdev
   )a
 
+  @repo_timeout Pleroma.Config.get([Pleroma.Repo, :timeout], 15_000)
+
   def compile_dir(dir) when is_binary(dir) do
     dir
     |> File.ls!()
@@ -63,4 +65,21 @@ defmodule Pleroma.Utils do
   end
 
   def posix_error_message(_), do: ""
+
+  @doc """
+  Returns [timeout: integer] suitable for passing as an option to Repo functions.
+
+  This function detects if the execution was triggered from IEx shell, Mix task, or
+  ./bin/pleroma_ctl and sets the timeout to :infinity, else returns the default timeout value.
+  """
+  @spec query_timeout() :: [timeout: integer]
+  def query_timeout do
+    {parent, _, _, _} = Process.info(self(), :current_stacktrace) |> elem(1) |> Enum.fetch!(2)
+
+    cond do
+      parent |> to_string |> String.starts_with?("Elixir.Mix.Task") -> [timeout: :infinity]
+      parent == :erl_eval -> [timeout: :infinity]
+      true -> [timeout: @repo_timeout]
+    end
+  end
 end
diff --git a/lib/pleroma/web.ex b/lib/pleroma/web.ex
index 8630f244b..d26931af9 100644
--- a/lib/pleroma/web.ex
+++ b/lib/pleroma/web.ex
@@ -35,9 +35,10 @@ defmodule Pleroma.Web do
       import Plug.Conn
 
       import Pleroma.Web.Gettext
-      import Pleroma.Web.Router.Helpers
       import Pleroma.Web.TranslationHelpers
 
+      alias Pleroma.Web.Router.Helpers, as: Routes
+
       plug(:set_put_layout)
 
       defp set_put_layout(conn, _) do
@@ -131,7 +132,8 @@ defmodule Pleroma.Web do
 
       import Pleroma.Web.ErrorHelpers
       import Pleroma.Web.Gettext
-      import Pleroma.Web.Router.Helpers
+
+      alias Pleroma.Web.Router.Helpers, as: Routes
 
       require Logger
 
@@ -229,20 +231,4 @@ defmodule Pleroma.Web do
   defmacro __using__(which) when is_atom(which) do
     apply(__MODULE__, which, [])
   end
-
-  def base_url do
-    Pleroma.Web.Endpoint.url()
-  end
-
-  # TODO: Change to Phoenix.Router.routes/1 for Phoenix 1.6.0+
-  def get_api_routes do
-    Pleroma.Web.Router.__routes__()
-    |> Enum.reject(fn r -> r.plug == Pleroma.Web.Fallback.RedirectController end)
-    |> Enum.map(fn r ->
-      r.path
-      |> String.split("/", trim: true)
-      |> List.first()
-    end)
-    |> Enum.uniq()
-  end
 end
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index 5b45e2ca1..18368943d 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -10,6 +10,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   alias Pleroma.Conversation
   alias Pleroma.Conversation.Participation
   alias Pleroma.Filter
+  alias Pleroma.Hashtag
   alias Pleroma.Maps
   alias Pleroma.Notification
   alias Pleroma.Object
@@ -87,7 +88,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp increase_replies_count_if_reply(_create_data), do: :noop
 
-  @object_types ~w[ChatMessage Question Answer Audio Video Event Article]
+  @object_types ~w[ChatMessage Question Answer Audio Video Event Article Note]
   @impl true
   def persist(%{"type" => type} = object, meta) when type in @object_types do
     with {:ok, object} <- Object.create(object) do
@@ -465,6 +466,23 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> Repo.one()
   end
 
+  defp fetch_paginated_optimized(query, opts, pagination) do
+    # Note: tag-filtering funcs may apply "ORDER BY objects.id DESC",
+    #   and extra sorting on "activities.id DESC NULLS LAST" would worse the query plan
+    opts = Map.put(opts, :skip_extra_order, true)
+
+    Pagination.fetch_paginated(query, opts, pagination)
+  end
+
+  def fetch_activities(recipients, opts \\ %{}, pagination \\ :keyset) do
+    list_memberships = Pleroma.List.memberships(opts[:user])
+
+    fetch_activities_query(recipients ++ list_memberships, opts)
+    |> fetch_paginated_optimized(opts, pagination)
+    |> Enum.reverse()
+    |> maybe_update_cc(list_memberships, opts[:user])
+  end
+
   @spec fetch_public_or_unlisted_activities(map(), Pagination.type()) :: [Activity.t()]
   def fetch_public_or_unlisted_activities(opts \\ %{}, pagination \\ :keyset) do
     opts = Map.delete(opts, :user)
@@ -472,7 +490,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     [Constants.as_public()]
     |> fetch_activities_query(opts)
     |> restrict_unlisted(opts)
-    |> Pagination.fetch_paginated(opts, pagination)
+    |> fetch_paginated_optimized(opts, pagination)
   end
 
   @spec fetch_public_activities(map(), Pagination.type()) :: [Activity.t()]
@@ -612,7 +630,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
       |> Map.put(:type, ["Create", "Announce"])
       |> Map.put(:user, reading_user)
       |> Map.put(:actor_id, user.ap_id)
-      |> Map.put(:pinned_activity_ids, user.pinned_activities)
+      |> Map.put(:pinned_object_ids, Map.keys(user.pinned_objects))
 
     params =
       if User.blocks?(reading_user, user) do
@@ -693,51 +711,143 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp restrict_since(query, _), do: query
 
-  defp restrict_tag_reject(_query, %{tag_reject: _tag_reject, skip_preload: true}) do
-    raise "Can't use the child object without preloading!"
+  defp restrict_embedded_tag_all(_query, %{tag_all: _tag_all, skip_preload: true}) do
+    raise_on_missing_preload()
+  end
+
+  defp restrict_embedded_tag_all(query, %{tag_all: [_ | _] = tag_all}) do
+    from(
+      [_activity, object] in query,
+      where: fragment("(?)->'tag' \\?& (?)", object.data, ^tag_all)
+    )
+  end
+
+  defp restrict_embedded_tag_all(query, %{tag_all: tag}) when is_binary(tag) do
+    restrict_embedded_tag_any(query, %{tag: tag})
+  end
+
+  defp restrict_embedded_tag_all(query, _), do: query
+
+  defp restrict_embedded_tag_any(_query, %{tag: _tag, skip_preload: true}) do
+    raise_on_missing_preload()
   end
 
-  defp restrict_tag_reject(query, %{tag_reject: [_ | _] = tag_reject}) do
+  defp restrict_embedded_tag_any(query, %{tag: [_ | _] = tag_any}) do
+    from(
+      [_activity, object] in query,
+      where: fragment("(?)->'tag' \\?| (?)", object.data, ^tag_any)
+    )
+  end
+
+  defp restrict_embedded_tag_any(query, %{tag: tag}) when is_binary(tag) do
+    restrict_embedded_tag_any(query, %{tag: [tag]})
+  end
+
+  defp restrict_embedded_tag_any(query, _), do: query
+
+  defp restrict_embedded_tag_reject_any(_query, %{tag_reject: _tag_reject, skip_preload: true}) do
+    raise_on_missing_preload()
+  end
+
+  defp restrict_embedded_tag_reject_any(query, %{tag_reject: [_ | _] = tag_reject}) do
     from(
       [_activity, object] in query,
       where: fragment("not (?)->'tag' \\?| (?)", object.data, ^tag_reject)
     )
   end
 
-  defp restrict_tag_reject(query, _), do: query
+  defp restrict_embedded_tag_reject_any(query, %{tag_reject: tag_reject})
+       when is_binary(tag_reject) do
+    restrict_embedded_tag_reject_any(query, %{tag_reject: [tag_reject]})
+  end
 
-  defp restrict_tag_all(_query, %{tag_all: _tag_all, skip_preload: true}) do
-    raise "Can't use the child object without preloading!"
+  defp restrict_embedded_tag_reject_any(query, _), do: query
+
+  defp object_ids_query_for_tags(tags) do
+    from(hto in "hashtags_objects")
+    |> join(:inner, [hto], ht in Pleroma.Hashtag, on: hto.hashtag_id == ht.id)
+    |> where([hto, ht], ht.name in ^tags)
+    |> select([hto], hto.object_id)
+    |> distinct([hto], true)
+  end
+
+  defp restrict_hashtag_all(_query, %{tag_all: _tag, skip_preload: true}) do
+    raise_on_missing_preload()
+  end
+
+  defp restrict_hashtag_all(query, %{tag_all: [single_tag]}) do
+    restrict_hashtag_any(query, %{tag: single_tag})
   end
 
-  defp restrict_tag_all(query, %{tag_all: [_ | _] = tag_all}) do
+  defp restrict_hashtag_all(query, %{tag_all: [_ | _] = tags}) do
     from(
       [_activity, object] in query,
-      where: fragment("(?)->'tag' \\?& (?)", object.data, ^tag_all)
+      where:
+        fragment(
+          """
+          (SELECT array_agg(hashtags.name) FROM hashtags JOIN hashtags_objects
+            ON hashtags_objects.hashtag_id = hashtags.id WHERE hashtags.name = ANY(?)
+              AND hashtags_objects.object_id = ?) @> ?
+          """,
+          ^tags,
+          object.id,
+          ^tags
+        )
     )
   end
 
-  defp restrict_tag_all(query, _), do: query
+  defp restrict_hashtag_all(query, %{tag_all: tag}) when is_binary(tag) do
+    restrict_hashtag_all(query, %{tag_all: [tag]})
+  end
 
-  defp restrict_tag(_query, %{tag: _tag, skip_preload: true}) do
-    raise "Can't use the child object without preloading!"
+  defp restrict_hashtag_all(query, _), do: query
+
+  defp restrict_hashtag_any(_query, %{tag: _tag, skip_preload: true}) do
+    raise_on_missing_preload()
   end
 
-  defp restrict_tag(query, %{tag: tag}) when is_list(tag) do
+  defp restrict_hashtag_any(query, %{tag: [_ | _] = tags}) do
+    hashtag_ids =
+      from(ht in Hashtag, where: ht.name in ^tags, select: ht.id)
+      |> Repo.all()
+
+    # Note: NO extra ordering should be done on "activities.id desc nulls last" for optimal plan
     from(
       [_activity, object] in query,
-      where: fragment("(?)->'tag' \\?| (?)", object.data, ^tag)
+      join: hto in "hashtags_objects",
+      on: hto.object_id == object.id,
+      where: hto.hashtag_id in ^hashtag_ids,
+      distinct: [desc: object.id],
+      order_by: [desc: object.id]
     )
   end
 
-  defp restrict_tag(query, %{tag: tag}) when is_binary(tag) do
+  defp restrict_hashtag_any(query, %{tag: tag}) when is_binary(tag) do
+    restrict_hashtag_any(query, %{tag: [tag]})
+  end
+
+  defp restrict_hashtag_any(query, _), do: query
+
+  defp restrict_hashtag_reject_any(_query, %{tag_reject: _tag_reject, skip_preload: true}) do
+    raise_on_missing_preload()
+  end
+
+  defp restrict_hashtag_reject_any(query, %{tag_reject: [_ | _] = tags_reject}) do
     from(
       [_activity, object] in query,
-      where: fragment("(?)->'tag' \\? (?)", object.data, ^tag)
+      where: object.id not in subquery(object_ids_query_for_tags(tags_reject))
     )
   end
 
-  defp restrict_tag(query, _), do: query
+  defp restrict_hashtag_reject_any(query, %{tag_reject: tag_reject}) when is_binary(tag_reject) do
+    restrict_hashtag_reject_any(query, %{tag_reject: [tag_reject]})
+  end
+
+  defp restrict_hashtag_reject_any(query, _), do: query
+
+  defp raise_on_missing_preload do
+    raise "Can't use the child object without preloading!"
+  end
 
   defp restrict_recipients(query, [], _user), do: query
 
@@ -965,8 +1075,18 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp restrict_unlisted(query, _), do: query
 
-  defp restrict_pinned(query, %{pinned: true, pinned_activity_ids: ids}) do
-    from(activity in query, where: activity.id in ^ids)
+  defp restrict_pinned(query, %{pinned: true, pinned_object_ids: ids}) do
+    from(
+      [activity, object: o] in query,
+      where:
+        fragment(
+          "(?)->>'type' = 'Create' and coalesce((?)->'object'->>'id', (?)->>'object') = any (?)",
+          activity.data,
+          activity.data,
+          activity.data,
+          ^ids
+        )
+    )
   end
 
   defp restrict_pinned(query, _), do: query
@@ -1098,6 +1218,26 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp maybe_order(query, _), do: query
 
+  defp normalize_fetch_activities_query_opts(opts) do
+    Enum.reduce([:tag, :tag_all, :tag_reject], opts, fn key, opts ->
+      case opts[key] do
+        value when is_bitstring(value) ->
+          Map.put(opts, key, Hashtag.normalize_name(value))
+
+        value when is_list(value) ->
+          normalized_value =
+            value
+            |> Enum.map(&Hashtag.normalize_name/1)
+            |> Enum.uniq()
+
+          Map.put(opts, key, normalized_value)
+
+        _ ->
+          opts
+      end
+    end)
+  end
+
   defp fetch_activities_query_ap_ids_ops(opts) do
     source_user = opts[:muting_user]
     ap_id_relationships = if source_user, do: [:mute, :reblog_mute], else: []
@@ -1121,6 +1261,8 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   end
 
   def fetch_activities_query(recipients, opts \\ %{}) do
+    opts = normalize_fetch_activities_query_opts(opts)
+
     {restrict_blocked_opts, restrict_muted_opts, restrict_muted_reblogs_opts} =
       fetch_activities_query_ap_ids_ops(opts)
 
@@ -1128,50 +1270,51 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
       skip_thread_containment: Config.get([:instance, :skip_thread_containment])
     }
 
-    Activity
-    |> maybe_preload_objects(opts)
-    |> maybe_preload_bookmarks(opts)
-    |> maybe_preload_report_notes(opts)
-    |> maybe_set_thread_muted_field(opts)
-    |> maybe_order(opts)
-    |> restrict_recipients(recipients, opts[:user])
-    |> restrict_replies(opts)
-    |> restrict_tag(opts)
-    |> restrict_tag_reject(opts)
-    |> restrict_tag_all(opts)
-    |> restrict_since(opts)
-    |> restrict_local(opts)
-    |> restrict_remote(opts)
-    |> restrict_actor(opts)
-    |> restrict_type(opts)
-    |> restrict_state(opts)
-    |> restrict_favorited_by(opts)
-    |> restrict_blocked(restrict_blocked_opts)
-    |> restrict_muted(restrict_muted_opts)
-    |> restrict_filtered(opts)
-    |> restrict_media(opts)
-    |> restrict_visibility(opts)
-    |> restrict_thread_visibility(opts, config)
-    |> restrict_reblogs(opts)
-    |> restrict_pinned(opts)
-    |> restrict_muted_reblogs(restrict_muted_reblogs_opts)
-    |> restrict_instance(opts)
-    |> restrict_announce_object_actor(opts)
-    |> restrict_filtered(opts)
-    |> Activity.restrict_deactivated_users()
-    |> exclude_poll_votes(opts)
-    |> exclude_chat_messages(opts)
-    |> exclude_invisible_actors(opts)
-    |> exclude_visibility(opts)
-  end
-
-  def fetch_activities(recipients, opts \\ %{}, pagination \\ :keyset) do
-    list_memberships = Pleroma.List.memberships(opts[:user])
-
-    fetch_activities_query(recipients ++ list_memberships, opts)
-    |> Pagination.fetch_paginated(opts, pagination)
-    |> Enum.reverse()
-    |> maybe_update_cc(list_memberships, opts[:user])
+    query =
+      Activity
+      |> maybe_preload_objects(opts)
+      |> maybe_preload_bookmarks(opts)
+      |> maybe_preload_report_notes(opts)
+      |> maybe_set_thread_muted_field(opts)
+      |> maybe_order(opts)
+      |> restrict_recipients(recipients, opts[:user])
+      |> restrict_replies(opts)
+      |> restrict_since(opts)
+      |> restrict_local(opts)
+      |> restrict_remote(opts)
+      |> restrict_actor(opts)
+      |> restrict_type(opts)
+      |> restrict_state(opts)
+      |> restrict_favorited_by(opts)
+      |> restrict_blocked(restrict_blocked_opts)
+      |> restrict_muted(restrict_muted_opts)
+      |> restrict_filtered(opts)
+      |> restrict_media(opts)
+      |> restrict_visibility(opts)
+      |> restrict_thread_visibility(opts, config)
+      |> restrict_reblogs(opts)
+      |> restrict_pinned(opts)
+      |> restrict_muted_reblogs(restrict_muted_reblogs_opts)
+      |> restrict_instance(opts)
+      |> restrict_announce_object_actor(opts)
+      |> restrict_filtered(opts)
+      |> Activity.restrict_deactivated_users()
+      |> exclude_poll_votes(opts)
+      |> exclude_chat_messages(opts)
+      |> exclude_invisible_actors(opts)
+      |> exclude_visibility(opts)
+
+    if Config.feature_enabled?(:improved_hashtag_timeline) do
+      query
+      |> restrict_hashtag_any(opts)
+      |> restrict_hashtag_all(opts)
+      |> restrict_hashtag_reject_any(opts)
+    else
+      query
+      |> restrict_embedded_tag_any(opts)
+      |> restrict_embedded_tag_all(opts)
+      |> restrict_embedded_tag_reject_any(opts)
+    end
   end
 
   @doc """
@@ -1250,21 +1393,17 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp get_actor_url(_url), do: nil
 
-  defp object_to_user_data(data) do
-    avatar =
-      data["icon"]["url"] &&
-        %{
-          "type" => "Image",
-          "url" => [%{"href" => data["icon"]["url"]}]
-        }
+  defp normalize_image(%{"url" => url}) do
+    %{
+      "type" => "Image",
+      "url" => [%{"href" => url}]
+    }
+  end
 
-    banner =
-      data["image"]["url"] &&
-        %{
-          "type" => "Image",
-          "url" => [%{"href" => data["image"]["url"]}]
-        }
+  defp normalize_image(urls) when is_list(urls), do: urls |> List.first() |> normalize_image()
+  defp normalize_image(_), do: nil
 
+  defp object_to_user_data(data) do
     fields =
       data
       |> Map.get("attachment", [])
@@ -1290,6 +1429,9 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     invisible = data["invisible"] || false
     actor_type = data["type"] || "Person"
 
+    featured_address = data["featured"]
+    {:ok, pinned_objects} = fetch_and_prepare_featured_from_ap_id(featured_address)
+
     public_key =
       if is_map(data["publicKey"]) && is_binary(data["publicKey"]["publicKeyPem"]) do
         data["publicKey"]["publicKeyPem"]
@@ -1308,23 +1450,25 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
       ap_id: data["id"],
       uri: get_actor_url(data["url"]),
       ap_enabled: true,
-      banner: banner,
+      banner: normalize_image(data["image"]),
       fields: fields,
       emoji: emojis,
       is_locked: is_locked,
       is_discoverable: is_discoverable,
       invisible: invisible,
-      avatar: avatar,
+      avatar: normalize_image(data["icon"]),
       name: data["name"],
       follower_address: data["followers"],
       following_address: data["following"],
+      featured_address: featured_address,
       bio: data["summary"] || "",
       actor_type: actor_type,
       also_known_as: Map.get(data, "alsoKnownAs", []),
       public_key: public_key,
       inbox: data["inbox"],
       shared_inbox: shared_inbox,
-      accepts_chat_messages: accepts_chat_messages
+      accepts_chat_messages: accepts_chat_messages,
+      pinned_objects: pinned_objects
     }
 
     # nickname can be nil because of virtual actors
@@ -1462,6 +1606,41 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     end
   end
 
+  def pin_data_from_featured_collection(%{
+        "type" => type,
+        "orderedItems" => objects
+      })
+      when type in ["OrderedCollection", "Collection"] do
+    Map.new(objects, fn %{"id" => object_ap_id} -> {object_ap_id, NaiveDateTime.utc_now()} end)
+  end
+
+  def fetch_and_prepare_featured_from_ap_id(nil) do
+    {:ok, %{}}
+  end
+
+  def fetch_and_prepare_featured_from_ap_id(ap_id) do
+    with {:ok, data} <- Fetcher.fetch_and_contain_remote_object_from_id(ap_id) do
+      {:ok, pin_data_from_featured_collection(data)}
+    else
+      e ->
+        Logger.error("Could not decode featured collection at fetch #{ap_id}, #{inspect(e)}")
+        {:ok, %{}}
+    end
+  end
+
+  def pinned_fetch_task(nil), do: nil
+
+  def pinned_fetch_task(%{pinned_objects: pins}) do
+    if Enum.all?(pins, fn {ap_id, _} ->
+         Object.get_cached_by_ap_id(ap_id) ||
+           match?({:ok, _object}, Fetcher.fetch_object_from_id(ap_id))
+       end) do
+      :ok
+    else
+      :error
+    end
+  end
+
   def make_user_from_ap_id(ap_id) do
     user = User.get_cached_by_ap_id(ap_id)
 
@@ -1469,6 +1648,8 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
       Transmogrifier.upgrade_user_from_ap_id(ap_id)
     else
       with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
+        {:ok, _pid} = Task.start(fn -> pinned_fetch_task(data) end)
+
         if user do
           user
           |> User.remote_user_changeset(data)
diff --git a/lib/pleroma/web/activity_pub/activity_pub/persisting.ex b/lib/pleroma/web/activity_pub/activity_pub/persisting.ex
index 5ec8b7bab..f39cd000a 100644
--- a/lib/pleroma/web/activity_pub/activity_pub/persisting.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub/persisting.ex
@@ -3,5 +3,5 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.ActivityPub.Persisting do
-  @callback persist(map(), keyword()) :: {:ok, Activity.t() | Object.t()}
+  @callback persist(map(), keyword()) :: {:ok, struct()}
 end
diff --git a/lib/pleroma/web/activity_pub/activity_pub/streaming.ex b/lib/pleroma/web/activity_pub/activity_pub/streaming.ex
index 983168bff..33c7bf2bc 100644
--- a/lib/pleroma/web/activity_pub/activity_pub/streaming.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub/streaming.ex
@@ -3,10 +3,6 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.ActivityPub.Streaming do
-  alias Pleroma.Activity
-  alias Pleroma.Object
-  alias Pleroma.User
-
-  @callback stream_out(Activity.t()) :: any()
-  @callback stream_out_participations(Object.t(), User.t()) :: any()
+  @callback stream_out(struct()) :: any()
+  @callback stream_out_participations(struct(), struct()) :: any()
 end
diff --git a/lib/pleroma/web/activity_pub/activity_pub_controller.ex b/lib/pleroma/web/activity_pub/activity_pub_controller.ex
index 9d3dcc7f9..5aa3b281a 100644
--- a/lib/pleroma/web/activity_pub/activity_pub_controller.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub_controller.ex
@@ -543,4 +543,12 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
       |> json(object.data)
     end
   end
+
+  def pinned(conn, %{"nickname" => nickname}) do
+    with %User{} = user <- User.get_cached_by_nickname(nickname) do
+      conn
+      |> put_resp_header("content-type", "application/activity+json")
+      |> json(UserView.render("featured.json", %{user: user}))
+    end
+  end
 end
diff --git a/lib/pleroma/web/activity_pub/builder.ex b/lib/pleroma/web/activity_pub/builder.ex
index f56bfc600..cde477710 100644
--- a/lib/pleroma/web/activity_pub/builder.ex
+++ b/lib/pleroma/web/activity_pub/builder.ex
@@ -223,7 +223,7 @@ defmodule Pleroma.Web.ActivityPub.Builder do
           [actor.follower_address]
 
         public? and Visibility.is_local_public?(object) ->
-          [actor.follower_address, object.data["actor"], Pleroma.Constants.as_local_public()]
+          [actor.follower_address, object.data["actor"], Utils.as_local_public()]
 
         public? ->
           [actor.follower_address, object.data["actor"], Pleroma.Constants.as_public()]
@@ -273,4 +273,36 @@ defmodule Pleroma.Web.ActivityPub.Builder do
        "context" => object.data["context"]
      }, []}
   end
+
+  @spec pin(User.t(), Object.t()) :: {:ok, map(), keyword()}
+  def pin(%User{} = user, object) do
+    {:ok,
+     %{
+       "id" => Utils.generate_activity_id(),
+       "target" => pinned_url(user.nickname),
+       "object" => object.data["id"],
+       "actor" => user.ap_id,
+       "type" => "Add",
+       "to" => [Pleroma.Constants.as_public()],
+       "cc" => [user.follower_address]
+     }, []}
+  end
+
+  @spec unpin(User.t(), Object.t()) :: {:ok, map, keyword()}
+  def unpin(%User{} = user, object) do
+    {:ok,
+     %{
+       "id" => Utils.generate_activity_id(),
+       "target" => pinned_url(user.nickname),
+       "object" => object.data["id"],
+       "actor" => user.ap_id,
+       "type" => "Remove",
+       "to" => [Pleroma.Constants.as_public()],
+       "cc" => [user.follower_address]
+     }, []}
+  end
+
+  defp pinned_url(nickname) when is_binary(nickname) do
+    Pleroma.Web.Router.Helpers.activity_pub_url(Pleroma.Web.Endpoint, :pinned, nickname)
+  end
 end
diff --git a/lib/pleroma/web/activity_pub/mrf.ex b/lib/pleroma/web/activity_pub/mrf.ex
index ef5a09a93..f2fec3ff6 100644
--- a/lib/pleroma/web/activity_pub/mrf.ex
+++ b/lib/pleroma/web/activity_pub/mrf.ex
@@ -92,7 +92,9 @@ defmodule Pleroma.Web.ActivityPub.MRF do
   end
 
   def get_policies do
-    Pleroma.Config.get([:mrf, :policies], []) |> get_policies()
+    Pleroma.Config.get([:mrf, :policies], [])
+    |> get_policies()
+    |> Enum.concat([Pleroma.Web.ActivityPub.MRF.HashtagPolicy])
   end
 
   defp get_policies(policy) when is_atom(policy), do: [policy]
diff --git a/lib/pleroma/web/activity_pub/mrf/follow_bot_policy.ex b/lib/pleroma/web/activity_pub/mrf/follow_bot_policy.ex
new file mode 100644
index 000000000..7307c9c14
--- /dev/null
+++ b/lib/pleroma/web/activity_pub/mrf/follow_bot_policy.ex
@@ -0,0 +1,59 @@
+defmodule Pleroma.Web.ActivityPub.MRF.FollowBotPolicy do
+  @behaviour Pleroma.Web.ActivityPub.MRF
+  alias Pleroma.Config
+  alias Pleroma.User
+  alias Pleroma.Web.CommonAPI
+
+  require Logger
+
+  @impl true
+  def filter(message) do
+    with follower_nickname <- Config.get([:mrf_follow_bot, :follower_nickname]),
+         %User{actor_type: "Service"} = follower <-
+           User.get_cached_by_nickname(follower_nickname),
+         %{"type" => "Create", "object" => %{"type" => "Note"}} <- message do
+      try_follow(follower, message)
+    else
+      nil ->
+        Logger.warn(
+          "#{__MODULE__} skipped because of missing `:mrf_follow_bot, :follower_nickname` configuration, the :follower_nickname
+            account does not exist, or the account is not correctly configured as a bot."
+        )
+
+        {:ok, message}
+
+      _ ->
+        {:ok, message}
+    end
+  end
+
+  defp try_follow(follower, message) do
+    to = Map.get(message, "to", [])
+    cc = Map.get(message, "cc", [])
+    actor = [message["actor"]]
+
+    Enum.concat([to, cc, actor])
+    |> List.flatten()
+    |> Enum.uniq()
+    |> User.get_all_by_ap_id()
+    |> Enum.each(fn user ->
+      with false <- user.local,
+           false <- User.following?(follower, user),
+           false <- User.locked?(user),
+           false <- (user.bio || "") |> String.downcase() |> String.contains?("nobot") do
+        Logger.debug(
+          "#{__MODULE__}: Follow request from #{follower.nickname} to #{user.nickname}"
+        )
+
+        CommonAPI.follow(follower, user)
+      end
+    end)
+
+    {:ok, message}
+  end
+
+  @impl true
+  def describe do
+    {:ok, %{}}
+  end
+end
diff --git a/lib/pleroma/web/activity_pub/mrf/hashtag_policy.ex b/lib/pleroma/web/activity_pub/mrf/hashtag_policy.ex
new file mode 100644
index 000000000..def0c437c
--- /dev/null
+++ b/lib/pleroma/web/activity_pub/mrf/hashtag_policy.ex
@@ -0,0 +1,116 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.MRF.HashtagPolicy do
+  require Pleroma.Constants
+
+  alias Pleroma.Config
+  alias Pleroma.Object
+
+  @moduledoc """
+  Reject, TWKN-remove or Set-Sensitive messsages with specific hashtags (without the leading #)
+
+  Note: This MRF Policy is always enabled, if you want to disable it you have to set empty lists.
+  """
+
+  @behaviour Pleroma.Web.ActivityPub.MRF
+
+  defp check_reject(message, hashtags) do
+    if Enum.any?(Config.get([:mrf_hashtag, :reject]), fn match -> match in hashtags end) do
+      {:reject, "[HashtagPolicy] Matches with rejected keyword"}
+    else
+      {:ok, message}
+    end
+  end
+
+  defp check_ftl_removal(%{"to" => to} = message, hashtags) do
+    if Pleroma.Constants.as_public() in to and
+         Enum.any?(Config.get([:mrf_hashtag, :federated_timeline_removal]), fn match ->
+           match in hashtags
+         end) do
+      to = List.delete(to, Pleroma.Constants.as_public())
+      cc = [Pleroma.Constants.as_public() | message["cc"] || []]
+
+      message =
+        message
+        |> Map.put("to", to)
+        |> Map.put("cc", cc)
+        |> Kernel.put_in(["object", "to"], to)
+        |> Kernel.put_in(["object", "cc"], cc)
+
+      {:ok, message}
+    else
+      {:ok, message}
+    end
+  end
+
+  defp check_ftl_removal(message, _hashtags), do: {:ok, message}
+
+  defp check_sensitive(message, hashtags) do
+    if Enum.any?(Config.get([:mrf_hashtag, :sensitive]), fn match -> match in hashtags end) do
+      {:ok, Kernel.put_in(message, ["object", "sensitive"], true)}
+    else
+      {:ok, message}
+    end
+  end
+
+  @impl true
+  def filter(%{"type" => "Create", "object" => object} = message) do
+    hashtags = Object.hashtags(%Object{data: object})
+
+    if hashtags != [] do
+      with {:ok, message} <- check_reject(message, hashtags),
+           {:ok, message} <- check_ftl_removal(message, hashtags),
+           {:ok, message} <- check_sensitive(message, hashtags) do
+        {:ok, message}
+      end
+    else
+      {:ok, message}
+    end
+  end
+
+  @impl true
+  def filter(message), do: {:ok, message}
+
+  @impl true
+  def describe do
+    mrf_hashtag =
+      Config.get(:mrf_hashtag)
+      |> Enum.into(%{})
+
+    {:ok, %{mrf_hashtag: mrf_hashtag}}
+  end
+
+  @impl true
+  def config_description do
+    %{
+      key: :mrf_hashtag,
+      related_policy: "Pleroma.Web.ActivityPub.MRF.HashtagPolicy",
+      label: "MRF Hashtag",
+      description: @moduledoc,
+      children: [
+        %{
+          key: :reject,
+          type: {:list, :string},
+          description: "A list of hashtags which result in message being rejected.",
+          suggestions: ["foo"]
+        },
+        %{
+          key: :federated_timeline_removal,
+          type: {:list, :string},
+          description:
+            "A list of hashtags which result in message being removed from federated timelines (a.k.a unlisted).",
+          suggestions: ["foo"]
+        },
+        %{
+          key: :sensitive,
+          type: {:list, :string},
+          description:
+            "A list of hashtags which result in message being set as sensitive (a.k.a NSFW/R-18)",
+          suggestions: ["nsfw", "r18"]
+        }
+      ]
+    }
+  end
+end
diff --git a/lib/pleroma/web/activity_pub/mrf/no_empty_policy.ex b/lib/pleroma/web/activity_pub/mrf/no_empty_policy.ex
index 32bb1b645..f4c5db05c 100644
--- a/lib/pleroma/web/activity_pub/mrf/no_empty_policy.ex
+++ b/lib/pleroma/web/activity_pub/mrf/no_empty_policy.ex
@@ -6,7 +6,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.NoEmptyPolicy do
   @moduledoc "Filter local activities which have no content"
   @behaviour Pleroma.Web.ActivityPub.MRF
 
-  alias Pleroma.Web
+  alias Pleroma.Web.Endpoint
 
   @impl true
   def filter(%{"actor" => actor} = object) do
@@ -24,7 +24,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.NoEmptyPolicy do
   def filter(object), do: {:ok, object}
 
   defp is_local?(actor) do
-    if actor |> String.starts_with?("#{Web.base_url()}") do
+    if actor |> String.starts_with?("#{Endpoint.url()}") do
       true
     else
       false
diff --git a/lib/pleroma/web/activity_pub/mrf/simple_policy.ex b/lib/pleroma/web/activity_pub/mrf/simple_policy.ex
index bb3838d2c..d40348cb1 100644
--- a/lib/pleroma/web/activity_pub/mrf/simple_policy.ex
+++ b/lib/pleroma/web/activity_pub/mrf/simple_policy.ex
@@ -64,20 +64,16 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
          %{host: actor_host} = _actor_info,
          %{
            "type" => "Create",
-           "object" => child_object
+           "object" => %{} = _child_object
          } = object
-       )
-       when is_map(child_object) do
+       ) do
     media_nsfw =
       Config.get([:mrf_simple, :media_nsfw])
       |> MRF.subdomains_regex()
 
     object =
       if MRF.subdomain_match?(media_nsfw, actor_host) do
-        tags = (child_object["tag"] || []) ++ ["nsfw"]
-        child_object = Map.put(child_object, "tag", tags)
-        child_object = Map.put(child_object, "sensitive", true)
-        Map.put(object, "object", child_object)
+        Kernel.put_in(object, ["object", "sensitive"], true)
       else
         object
       end
@@ -181,6 +177,14 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
 
   defp check_banner_removal(_actor_info, object), do: {:ok, object}
 
+  defp check_object(%{"object" => object} = activity) do
+    with {:ok, _object} <- filter(object) do
+      {:ok, activity}
+    end
+  end
+
+  defp check_object(object), do: {:ok, object}
+
   @impl true
   def filter(%{"type" => "Delete", "actor" => actor} = object) do
     %{host: actor_host} = URI.parse(actor)
@@ -206,7 +210,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
          {:ok, object} <- check_media_nsfw(actor_info, object),
          {:ok, object} <- check_ftl_removal(actor_info, object),
          {:ok, object} <- check_followers_only(actor_info, object),
-         {:ok, object} <- check_report_removal(actor_info, object) do
+         {:ok, object} <- check_report_removal(actor_info, object),
+         {:ok, object} <- check_object(object) do
       {:ok, object}
     else
       {:reject, nil} -> {:reject, "[SimplePolicy]"}
@@ -231,6 +236,19 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
     end
   end
 
+  def filter(object) when is_binary(object) do
+    uri = URI.parse(object)
+
+    with {:ok, object} <- check_accept(uri, object),
+         {:ok, object} <- check_reject(uri, object) do
+      {:ok, object}
+    else
+      {:reject, nil} -> {:reject, "[SimplePolicy]"}
+      {:reject, _} = e -> e
+      _ -> {:reject, "[SimplePolicy]"}
+    end
+  end
+
   def filter(object), do: {:ok, object}
 
   @impl true
diff --git a/lib/pleroma/web/activity_pub/mrf/tag_policy.ex b/lib/pleroma/web/activity_pub/mrf/tag_policy.ex
index 5739cee63..528093ac0 100644
--- a/lib/pleroma/web/activity_pub/mrf/tag_policy.ex
+++ b/lib/pleroma/web/activity_pub/mrf/tag_policy.ex
@@ -28,20 +28,11 @@ defmodule Pleroma.Web.ActivityPub.MRF.TagPolicy do
          "mrf_tag:media-force-nsfw",
          %{
            "type" => "Create",
-           "object" => %{"attachment" => child_attachment} = object
+           "object" => %{"attachment" => child_attachment}
          } = message
        )
        when length(child_attachment) > 0 do
-    tags = (object["tag"] || []) ++ ["nsfw"]
-
-    object =
-      object
-      |> Map.put("tag", tags)
-      |> Map.put("sensitive", true)
-
-    message = Map.put(message, "object", object)
-
-    {:ok, message}
+    {:ok, Kernel.put_in(message, ["object", "sensitive"], true)}
   end
 
   defp process_tag(
diff --git a/lib/pleroma/web/activity_pub/object_validator.ex b/lib/pleroma/web/activity_pub/object_validator.ex
index 297c19cc0..248a12a36 100644
--- a/lib/pleroma/web/activity_pub/object_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validator.ex
@@ -17,6 +17,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
   alias Pleroma.Object.Containment
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.ObjectValidators.AcceptRejectValidator
+  alias Pleroma.Web.ActivityPub.ObjectValidators.AddRemoveValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.AnnounceValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator
@@ -37,37 +38,6 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
   @impl true
   def validate(object, meta)
 
-  def validate(%{"type" => type} = object, meta)
-      when type in ~w[Accept Reject] do
-    with {:ok, object} <-
-           object
-           |> AcceptRejectValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      object = stringify_keys(object)
-      {:ok, object, meta}
-    end
-  end
-
-  def validate(%{"type" => "Event"} = object, meta) do
-    with {:ok, object} <-
-           object
-           |> EventValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      object = stringify_keys(object)
-      {:ok, object, meta}
-    end
-  end
-
-  def validate(%{"type" => "Follow"} = object, meta) do
-    with {:ok, object} <-
-           object
-           |> FollowValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      object = stringify_keys(object)
-      {:ok, object, meta}
-    end
-  end
-
   def validate(%{"type" => "Block"} = block_activity, meta) do
     with {:ok, block_activity} <-
            block_activity
@@ -87,16 +57,6 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
     end
   end
 
-  def validate(%{"type" => "Update"} = update_activity, meta) do
-    with {:ok, update_activity} <-
-           update_activity
-           |> UpdateValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      update_activity = stringify_keys(update_activity)
-      {:ok, update_activity, meta}
-    end
-  end
-
   def validate(%{"type" => "Undo"} = object, meta) do
     with {:ok, object} <-
            object
@@ -123,76 +83,6 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
     end
   end
 
-  def validate(%{"type" => "Like"} = object, meta) do
-    with {:ok, object} <-
-           object
-           |> LikeValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      object = stringify_keys(object)
-      {:ok, object, meta}
-    end
-  end
-
-  def validate(%{"type" => "ChatMessage"} = object, meta) do
-    with {:ok, object} <-
-           object
-           |> ChatMessageValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      object = stringify_keys(object)
-      {:ok, object, meta}
-    end
-  end
-
-  def validate(%{"type" => "Question"} = object, meta) do
-    with {:ok, object} <-
-           object
-           |> QuestionValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      object = stringify_keys(object)
-      {:ok, object, meta}
-    end
-  end
-
-  def validate(%{"type" => type} = object, meta) when type in ~w[Audio Video] do
-    with {:ok, object} <-
-           object
-           |> AudioVideoValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      object = stringify_keys(object)
-      {:ok, object, meta}
-    end
-  end
-
-  def validate(%{"type" => "Article"} = object, meta) do
-    with {:ok, object} <-
-           object
-           |> ArticleNoteValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      object = stringify_keys(object)
-      {:ok, object, meta}
-    end
-  end
-
-  def validate(%{"type" => "Answer"} = object, meta) do
-    with {:ok, object} <-
-           object
-           |> AnswerValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      object = stringify_keys(object)
-      {:ok, object, meta}
-    end
-  end
-
-  def validate(%{"type" => "EmojiReact"} = object, meta) do
-    with {:ok, object} <-
-           object
-           |> EmojiReactValidator.cast_and_validate()
-           |> Ecto.Changeset.apply_action(:insert) do
-      object = stringify_keys(object)
-      {:ok, object, meta}
-    end
-  end
-
   def validate(
         %{"type" => "Create", "object" => %{"type" => "ChatMessage"} = object} = create_activity,
         meta
@@ -212,7 +102,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
         %{"type" => "Create", "object" => %{"type" => objtype} = object} = create_activity,
         meta
       )
-      when objtype in ~w[Question Answer Audio Video Event Article] do
+      when objtype in ~w[Question Answer Audio Video Event Article Note] do
     with {:ok, object_data} <- cast_and_apply(object),
          meta = Keyword.put(meta, :object_data, object_data |> stringify_keys),
          {:ok, create_activity} <-
@@ -224,10 +114,61 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
     end
   end
 
-  def validate(%{"type" => "Announce"} = object, meta) do
+  def validate(%{"type" => type} = object, meta)
+      when type in ~w[Event Question Audio Video Article Note] do
+    validator =
+      case type do
+        "Event" -> EventValidator
+        "Question" -> QuestionValidator
+        "Audio" -> AudioVideoValidator
+        "Video" -> AudioVideoValidator
+        "Article" -> ArticleNoteValidator
+        "Note" -> ArticleNoteValidator
+      end
+
+    with {:ok, object} <-
+           object
+           |> validator.cast_and_validate()
+           |> Ecto.Changeset.apply_action(:insert) do
+      object = stringify_keys(object)
+
+      # Insert copy of hashtags as strings for the non-hashtag table indexing
+      tag = (object["tag"] || []) ++ Object.hashtags(%Object{data: object})
+      object = Map.put(object, "tag", tag)
+
+      {:ok, object, meta}
+    end
+  end
+
+  def validate(%{"type" => type} = object, meta)
+      when type in ~w[Accept Reject Follow Update Like EmojiReact Announce
+      ChatMessage Answer] do
+    validator =
+      case type do
+        "Accept" -> AcceptRejectValidator
+        "Reject" -> AcceptRejectValidator
+        "Follow" -> FollowValidator
+        "Update" -> UpdateValidator
+        "Like" -> LikeValidator
+        "EmojiReact" -> EmojiReactValidator
+        "Announce" -> AnnounceValidator
+        "ChatMessage" -> ChatMessageValidator
+        "Answer" -> AnswerValidator
+      end
+
+    with {:ok, object} <-
+           object
+           |> validator.cast_and_validate()
+           |> Ecto.Changeset.apply_action(:insert) do
+      object = stringify_keys(object)
+      {:ok, object, meta}
+    end
+  end
+
+  def validate(%{"type" => type} = object, meta) when type in ~w(Add Remove) do
     with {:ok, object} <-
            object
-           |> AnnounceValidator.cast_and_validate()
+           |> AddRemoveValidator.cast_and_validate()
            |> Ecto.Changeset.apply_action(:insert) do
       object = stringify_keys(object)
       {:ok, object, meta}
@@ -254,13 +195,13 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
     EventValidator.cast_and_apply(object)
   end
 
-  def cast_and_apply(%{"type" => "Article"} = object) do
+  def cast_and_apply(%{"type" => type} = object) when type in ~w[Article Note] do
     ArticleNoteValidator.cast_and_apply(object)
   end
 
   def cast_and_apply(o), do: {:error, {:validator_not_set, o}}
 
-  # is_struct/1 isn't present in Elixir 1.8.x
+  # is_struct/1 appears in Elixir 1.11
   def stringify_keys(%{__struct__: _} = object) do
     object
     |> Map.from_struct()
diff --git a/lib/pleroma/web/activity_pub/object_validators/accept_reject_validator.ex b/lib/pleroma/web/activity_pub/object_validators/accept_reject_validator.ex
index d31e780c3..b577a1044 100644
--- a/lib/pleroma/web/activity_pub/object_validators/accept_reject_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/accept_reject_validator.ex
@@ -27,7 +27,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AcceptRejectValidator do
     |> cast(data, __schema__(:fields))
   end
 
-  def validate_data(cng) do
+  defp validate_data(cng) do
     cng
     |> validate_required([:id, :type, :actor, :to, :cc, :object])
     |> validate_inclusion(:type, ["Accept", "Reject"])
diff --git a/lib/pleroma/web/activity_pub/object_validators/add_remove_validator.ex b/lib/pleroma/web/activity_pub/object_validators/add_remove_validator.ex
new file mode 100644
index 000000000..f885aabe4
--- /dev/null
+++ b/lib/pleroma/web/activity_pub/object_validators/add_remove_validator.ex
@@ -0,0 +1,77 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.ObjectValidators.AddRemoveValidator do
+  use Ecto.Schema
+
+  import Ecto.Changeset
+  import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
+
+  require Pleroma.Constants
+
+  alias Pleroma.EctoType.ActivityPub.ObjectValidators
+  alias Pleroma.User
+
+  @primary_key false
+
+  embedded_schema do
+    field(:id, ObjectValidators.ObjectID, primary_key: true)
+    field(:target)
+    field(:object, ObjectValidators.ObjectID)
+    field(:actor, ObjectValidators.ObjectID)
+    field(:type)
+    field(:to, ObjectValidators.Recipients, default: [])
+    field(:cc, ObjectValidators.Recipients, default: [])
+  end
+
+  def cast_and_validate(data) do
+    {:ok, actor} = User.get_or_fetch_by_ap_id(data["actor"])
+
+    {:ok, actor} = maybe_refetch_user(actor)
+
+    data
+    |> maybe_fix_data_for_mastodon(actor)
+    |> cast_data()
+    |> validate_data(actor)
+  end
+
+  defp maybe_fix_data_for_mastodon(data, actor) do
+    # Mastodon sends pin/unpin objects without id, to, cc fields
+    data
+    |> Map.put_new("id", Pleroma.Web.ActivityPub.Utils.generate_activity_id())
+    |> Map.put_new("to", [Pleroma.Constants.as_public()])
+    |> Map.put_new("cc", [actor.follower_address])
+  end
+
+  defp cast_data(data) do
+    cast(%__MODULE__{}, data, __schema__(:fields))
+  end
+
+  defp validate_data(changeset, actor) do
+    changeset
+    |> validate_required([:id, :target, :object, :actor, :type, :to, :cc])
+    |> validate_inclusion(:type, ~w(Add Remove))
+    |> validate_actor_presence()
+    |> validate_collection_belongs_to_actor(actor)
+    |> validate_object_presence()
+  end
+
+  defp validate_collection_belongs_to_actor(changeset, actor) do
+    validate_change(changeset, :target, fn :target, target ->
+      if target == actor.featured_address do
+        []
+      else
+        [target: "collection doesn't belong to actor"]
+      end
+    end)
+  end
+
+  defp maybe_refetch_user(%User{featured_address: address} = user) when is_binary(address) do
+    {:ok, user}
+  end
+
+  defp maybe_refetch_user(%User{ap_id: ap_id}) do
+    Pleroma.Web.ActivityPub.Transmogrifier.upgrade_user_from_ap_id(ap_id)
+  end
+end
diff --git a/lib/pleroma/web/activity_pub/object_validators/announce_validator.ex b/lib/pleroma/web/activity_pub/object_validators/announce_validator.ex
index b08a33e68..a2f752ac3 100644
--- a/lib/pleroma/web/activity_pub/object_validators/announce_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/announce_validator.ex
@@ -50,7 +50,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AnnounceValidator do
     cng
   end
 
-  def validate_data(data_cng) do
+  defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Announce"])
     |> validate_required([:id, :type, :object, :actor, :to, :cc])
@@ -68,7 +68,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AnnounceValidator do
          false <- Visibility.is_public?(object) do
       same_actor = object.data["actor"] == actor.ap_id
       recipients = get_field(cng, :to) ++ get_field(cng, :cc)
-      local_public = Pleroma.Constants.as_local_public()
+      local_public = Utils.as_local_public()
 
       is_public =
         Enum.member?(recipients, Pleroma.Constants.as_public()) or
diff --git a/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex b/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex
index 15e4413cd..3451e1ff8 100644
--- a/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/answer_validator.ex
@@ -6,6 +6,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator do
   use Ecto.Schema
 
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
+  alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
 
   import Ecto.Changeset
@@ -23,6 +24,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator do
     field(:name, :string)
     field(:inReplyTo, ObjectValidators.ObjectID)
     field(:attributedTo, ObjectValidators.ObjectID)
+    field(:context, :string)
 
     # TODO: Remove actor on objects
     field(:actor, ObjectValidators.ObjectID)
@@ -46,11 +48,16 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator do
   end
 
   def changeset(struct, data) do
+    data =
+      data
+      |> CommonFixes.fix_actor()
+      |> CommonFixes.fix_object_defaults()
+
     struct
     |> cast(data, __schema__(:fields))
   end
 
-  def validate_data(data_cng) do
+  defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Answer"])
     |> validate_required([:id, :inReplyTo, :name, :attributedTo, :actor])
diff --git a/lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex b/lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex
index b0388ef3b..193f85f49 100644
--- a/lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex
@@ -9,6 +9,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator do
   alias Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
+  alias Pleroma.Web.ActivityPub.ObjectValidators.TagValidator
   alias Pleroma.Web.ActivityPub.Transmogrifier
 
   import Ecto.Changeset
@@ -22,8 +23,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator do
     field(:cc, ObjectValidators.Recipients, default: [])
     field(:bto, ObjectValidators.Recipients, default: [])
     field(:bcc, ObjectValidators.Recipients, default: [])
-    # TODO: Write type
-    field(:tag, {:array, :map}, default: [])
+    embeds_many(:tag, TagValidator)
     field(:type, :string)
 
     field(:name, :string)
@@ -50,6 +50,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator do
 
     field(:likes, {:array, ObjectValidators.ObjectID}, default: [])
     field(:announcements, {:array, ObjectValidators.ObjectID}, default: [])
+
+    field(:replies, {:array, ObjectValidators.ObjectID}, default: [])
   end
 
   def cast_and_apply(data) do
@@ -65,36 +67,51 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator do
   end
 
   def cast_data(data) do
-    data = fix(data)
-
     %__MODULE__{}
     |> changeset(data)
   end
 
-  defp fix_url(%{"url" => url} = data) when is_map(url) do
-    Map.put(data, "url", url["href"])
-  end
-
+  defp fix_url(%{"url" => url} = data) when is_bitstring(url), do: data
+  defp fix_url(%{"url" => url} = data) when is_map(url), do: Map.put(data, "url", url["href"])
   defp fix_url(data), do: data
 
+  defp fix_tag(%{"tag" => tag} = data) when is_list(tag), do: data
+  defp fix_tag(%{"tag" => tag} = data) when is_map(tag), do: Map.put(data, "tag", [tag])
+  defp fix_tag(data), do: Map.drop(data, ["tag"])
+
+  defp fix_replies(%{"replies" => %{"first" => %{"items" => replies}}} = data)
+       when is_list(replies),
+       do: Map.put(data, "replies", replies)
+
+  defp fix_replies(%{"replies" => %{"items" => replies}} = data) when is_list(replies),
+    do: Map.put(data, "replies", replies)
+
+  defp fix_replies(%{"replies" => replies} = data) when is_bitstring(replies),
+    do: Map.drop(data, ["replies"])
+
+  defp fix_replies(data), do: data
+
   defp fix(data) do
     data
-    |> CommonFixes.fix_defaults()
-    |> CommonFixes.fix_attribution()
     |> CommonFixes.fix_actor()
+    |> CommonFixes.fix_object_defaults()
     |> fix_url()
+    |> fix_tag()
+    |> fix_replies()
     |> Transmogrifier.fix_emoji()
+    |> Transmogrifier.fix_content_map()
   end
 
   def changeset(struct, data) do
     data = fix(data)
 
     struct
-    |> cast(data, __schema__(:fields) -- [:attachment])
+    |> cast(data, __schema__(:fields) -- [:attachment, :tag])
     |> cast_embed(:attachment)
+    |> cast_embed(:tag)
   end
 
-  def validate_data(data_cng) do
+  defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Article", "Note"])
     |> validate_required([:id, :actor, :attributedTo, :type, :context, :context_id])
diff --git a/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
index 3175427ad..837787b9f 100644
--- a/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
@@ -6,7 +6,6 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
   use Ecto.Schema
 
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
-  alias Pleroma.Web.ActivityPub.ObjectValidators.UrlObjectValidator
 
   import Ecto.Changeset
 
@@ -21,6 +20,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
       field(:type, :string)
       field(:href, ObjectValidators.Uri)
       field(:mediaType, :string, default: "application/octet-stream")
+      field(:width, :integer)
+      field(:height, :integer)
     end
   end
 
@@ -52,7 +53,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
     data = fix_media_type(data)
 
     struct
-    |> cast(data, [:type, :href, :mediaType])
+    |> cast(data, [:type, :href, :mediaType, :width, :height])
     |> validate_inclusion(:type, ["Link"])
     |> validate_required([:type, :href, :mediaType])
   end
@@ -60,7 +61,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
   def fix_media_type(data) do
     data = Map.put_new(data, "mediaType", data["mimeType"])
 
-    if MIME.valid?(data["mediaType"]) do
+    if is_bitstring(data["mediaType"]) && MIME.extensions(data["mediaType"]) != [] do
       data
     else
       Map.put(data, "mediaType", "application/octet-stream")
@@ -90,7 +91,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
     end
   end
 
-  def validate_data(cng) do
+  defp validate_data(cng) do
     cng
     |> validate_inclusion(:type, ~w[Document Audio Image Video])
     |> validate_required([:mediaType, :url, :type])
diff --git a/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex b/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex
index 4a96fef52..572687deb 100644
--- a/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex
@@ -5,11 +5,11 @@
 defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator do
   use Ecto.Schema
 
-  alias Pleroma.EarmarkRenderer
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
   alias Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
+  alias Pleroma.Web.ActivityPub.ObjectValidators.TagValidator
   alias Pleroma.Web.ActivityPub.Transmogrifier
 
   import Ecto.Changeset
@@ -23,8 +23,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator do
     field(:cc, ObjectValidators.Recipients, default: [])
     field(:bto, ObjectValidators.Recipients, default: [])
     field(:bcc, ObjectValidators.Recipients, default: [])
-    # TODO: Write type
-    field(:tag, {:array, :map}, default: [])
+    embeds_many(:tag, TagValidator)
     field(:type, :string)
 
     field(:name, :string)
@@ -110,7 +109,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator do
        when is_binary(content) do
     content =
       content
-      |> Earmark.as_html!(%Earmark.Options{renderer: EarmarkRenderer})
+      |> Pleroma.Formatter.markdown_to_html()
       |> Pleroma.HTML.filter_tags()
 
     Map.put(data, "content", content)
@@ -120,9 +119,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator do
 
   defp fix(data) do
     data
-    |> CommonFixes.fix_defaults()
-    |> CommonFixes.fix_attribution()
     |> CommonFixes.fix_actor()
+    |> CommonFixes.fix_object_defaults()
     |> Transmogrifier.fix_emoji()
     |> fix_url()
     |> fix_content()
@@ -132,11 +130,12 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator do
     data = fix(data)
 
     struct
-    |> cast(data, __schema__(:fields) -- [:attachment])
+    |> cast(data, __schema__(:fields) -- [:attachment, :tag])
     |> cast_embed(:attachment)
+    |> cast_embed(:tag)
   end
 
-  def validate_data(data_cng) do
+  defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Audio", "Video"])
     |> validate_required([:id, :actor, :attributedTo, :type, :context, :attachment])
diff --git a/lib/pleroma/web/activity_pub/object_validators/block_validator.ex b/lib/pleroma/web/activity_pub/object_validators/block_validator.ex
index c5f77bb76..88948135f 100644
--- a/lib/pleroma/web/activity_pub/object_validators/block_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/block_validator.ex
@@ -26,7 +26,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.BlockValidator do
     |> cast(data, __schema__(:fields))
   end
 
-  def validate_data(cng) do
+  defp validate_data(cng) do
     cng
     |> validate_required([:id, :type, :actor, :to, :cc, :object])
     |> validate_inclusion(:type, ["Block"])
diff --git a/lib/pleroma/web/activity_pub/object_validators/chat_message_validator.ex b/lib/pleroma/web/activity_pub/object_validators/chat_message_validator.ex
index 1189778f2..b153156b0 100644
--- a/lib/pleroma/web/activity_pub/object_validators/chat_message_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/chat_message_validator.ex
@@ -67,7 +67,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ChatMessageValidator do
     |> cast_embed(:attachment)
   end
 
-  def validate_data(data_cng) do
+  defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["ChatMessage"])
     |> validate_required([:id, :actor, :to, :type, :published])
diff --git a/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex b/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
index 5f2c633bc..c958fcc5d 100644
--- a/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
@@ -3,26 +3,55 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes do
+  alias Pleroma.EctoType.ActivityPub.ObjectValidators
   alias Pleroma.Object.Containment
+  alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.Transmogrifier
   alias Pleroma.Web.ActivityPub.Utils
 
-  # based on Pleroma.Web.ActivityPub.Utils.lazy_put_objects_defaults
-  def fix_defaults(data) do
+  def cast_and_filter_recipients(message, field, follower_collection, field_fallback \\ []) do
+    {:ok, data} = ObjectValidators.Recipients.cast(message[field] || field_fallback)
+
+    data =
+      Enum.reject(data, fn x ->
+        String.ends_with?(x, "/followers") and x != follower_collection
+      end)
+
+    Map.put(message, field, data)
+  end
+
+  def fix_object_defaults(data) do
     %{data: %{"id" => context}, id: context_id} =
       Utils.create_context(data["context"] || data["conversation"])
 
+    %User{follower_address: follower_collection} = User.get_cached_by_ap_id(data["attributedTo"])
+
     data
     |> Map.put("context", context)
     |> Map.put("context_id", context_id)
+    |> cast_and_filter_recipients("to", follower_collection)
+    |> cast_and_filter_recipients("cc", follower_collection)
+    |> cast_and_filter_recipients("bto", follower_collection)
+    |> cast_and_filter_recipients("bcc", follower_collection)
+    |> Transmogrifier.fix_implicit_addressing(follower_collection)
   end
 
-  def fix_attribution(data) do
-    data
-    |> Map.put_new("actor", data["attributedTo"])
+  def fix_activity_addressing(activity, _meta) do
+    %User{follower_address: follower_collection} = User.get_cached_by_ap_id(activity["actor"])
+
+    activity
+    |> cast_and_filter_recipients("to", follower_collection)
+    |> cast_and_filter_recipients("cc", follower_collection)
+    |> cast_and_filter_recipients("bto", follower_collection)
+    |> cast_and_filter_recipients("bcc", follower_collection)
+    |> Transmogrifier.fix_implicit_addressing(follower_collection)
   end
 
   def fix_actor(data) do
-    actor = Containment.get_actor(data)
+    actor =
+      data
+      |> Map.put_new("actor", data["attributedTo"])
+      |> Containment.get_actor()
 
     data
     |> Map.put("actor", actor)
diff --git a/lib/pleroma/web/activity_pub/object_validators/common_validations.ex b/lib/pleroma/web/activity_pub/object_validators/common_validations.ex
index 093549a45..be5074348 100644
--- a/lib/pleroma/web/activity_pub/object_validators/common_validations.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/common_validations.ex
@@ -9,11 +9,13 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations do
   alias Pleroma.Object
   alias Pleroma.User
 
+  @spec validate_any_presence(Ecto.Changeset.t(), [atom()]) :: Ecto.Changeset.t()
   def validate_any_presence(cng, fields) do
     non_empty =
       fields
       |> Enum.map(fn field -> get_field(cng, field) end)
       |> Enum.any?(fn
+        nil -> false
         [] -> false
         _ -> true
       end)
@@ -29,6 +31,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations do
     end
   end
 
+  @spec validate_actor_presence(Ecto.Changeset.t(), keyword()) :: Ecto.Changeset.t()
   def validate_actor_presence(cng, options \\ []) do
     field_name = Keyword.get(options, :field_name, :actor)
 
@@ -47,6 +50,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations do
     end)
   end
 
+  @spec validate_object_presence(Ecto.Changeset.t(), keyword()) :: Ecto.Changeset.t()
   def validate_object_presence(cng, options \\ []) do
     field_name = Keyword.get(options, :field_name, :object)
     allowed_types = Keyword.get(options, :allowed_types, false)
@@ -68,6 +72,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations do
     end)
   end
 
+  @spec validate_object_or_user_presence(Ecto.Changeset.t(), keyword()) :: Ecto.Changeset.t()
   def validate_object_or_user_presence(cng, options \\ []) do
     field_name = Keyword.get(options, :field_name, :object)
     options = Keyword.put(options, :field_name, field_name)
@@ -83,6 +88,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations do
     if actor_cng.valid?, do: actor_cng, else: object_cng
   end
 
+  @spec validate_host_match(Ecto.Changeset.t(), [atom()]) :: Ecto.Changeset.t()
   def validate_host_match(cng, fields \\ [:id, :actor]) do
     if same_domain?(cng, fields) do
       cng
@@ -95,6 +101,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations do
     end
   end
 
+  @spec validate_fields_match(Ecto.Changeset.t(), [atom()]) :: Ecto.Changeset.t()
   def validate_fields_match(cng, fields) do
     if map_unique?(cng, fields) do
       cng
@@ -122,12 +129,14 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations do
     end)
   end
 
+  @spec same_domain?(Ecto.Changeset.t(), [atom()]) :: boolean()
   def same_domain?(cng, fields \\ [:actor, :object]) do
     map_unique?(cng, fields, fn value -> URI.parse(value).host end)
   end
 
   # This figures out if a user is able to create, delete or modify something
   # based on the domain and superuser status
+  @spec validate_modification_rights(Ecto.Changeset.t()) :: Ecto.Changeset.t()
   def validate_modification_rights(cng) do
     actor = User.get_cached_by_ap_id(get_field(cng, :actor))
 
diff --git a/lib/pleroma/web/activity_pub/object_validators/create_chat_message_validator.ex b/lib/pleroma/web/activity_pub/object_validators/create_chat_message_validator.ex
index 8384c16a7..7a31a99bf 100644
--- a/lib/pleroma/web/activity_pub/object_validators/create_chat_message_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/create_chat_message_validator.ex
@@ -39,7 +39,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateChatMessageValidator do
     |> validate_data(meta)
   end
 
-  def validate_data(cng, meta \\ []) do
+  defp validate_data(cng, meta) do
     cng
     |> validate_required([:id, :actor, :to, :type, :object])
     |> validate_inclusion(:type, ["Create"])
diff --git a/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex b/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex
index bf56a918c..d2de53049 100644
--- a/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex
@@ -10,8 +10,10 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
 
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
   alias Pleroma.Object
+  alias Pleroma.User
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
+  alias Pleroma.Web.ActivityPub.Transmogrifier
 
   import Ecto.Changeset
 
@@ -23,6 +25,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     field(:type, :string)
     field(:to, ObjectValidators.Recipients, default: [])
     field(:cc, ObjectValidators.Recipients, default: [])
+    field(:bto, ObjectValidators.Recipients, default: [])
+    field(:bcc, ObjectValidators.Recipients, default: [])
     field(:object, ObjectValidators.ObjectID)
     field(:expires_at, ObjectValidators.DateTime)
 
@@ -54,39 +58,37 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     |> cast(data, __schema__(:fields))
   end
 
-  defp fix_context(data, meta) do
-    if object = meta[:object_data] do
-      Map.put_new(data, "context", object["context"])
-    else
-      data
-    end
-  end
+  # CommonFixes.fix_activity_addressing adapted for Create specific behavior
+  defp fix_addressing(data, object) do
+    %User{follower_address: follower_collection} = User.get_cached_by_ap_id(data["actor"])
 
-  defp fix_addressing(data, meta) do
-    if object = meta[:object_data] do
-      data
-      |> Map.put_new("to", object["to"] || [])
-      |> Map.put_new("cc", object["cc"] || [])
-    else
-      data
-    end
+    data
+    |> CommonFixes.cast_and_filter_recipients("to", follower_collection, object["to"])
+    |> CommonFixes.cast_and_filter_recipients("cc", follower_collection, object["cc"])
+    |> CommonFixes.cast_and_filter_recipients("bto", follower_collection, object["bto"])
+    |> CommonFixes.cast_and_filter_recipients("bcc", follower_collection, object["bcc"])
+    |> Transmogrifier.fix_implicit_addressing(follower_collection)
   end
 
-  defp fix(data, meta) do
+  def fix(data, meta) do
+    object = meta[:object_data]
+
     data
-    |> fix_context(meta)
-    |> fix_addressing(meta)
     |> CommonFixes.fix_actor()
+    |> Map.put_new("context", object["context"])
+    |> fix_addressing(object)
   end
 
-  def validate_data(cng, meta \\ []) do
+  defp validate_data(cng, meta) do
+    object = meta[:object_data]
+
     cng
-    |> validate_required([:actor, :type, :object])
+    |> validate_required([:actor, :type, :object, :to, :cc])
     |> validate_inclusion(:type, ["Create"])
     |> CommonValidations.validate_actor_presence()
-    |> CommonValidations.validate_any_presence([:to, :cc])
-    |> validate_actors_match(meta)
-    |> validate_context_match(meta)
+    |> validate_actors_match(object)
+    |> validate_context_match(object)
+    |> validate_addressing_match(object)
     |> validate_object_nonexistence()
     |> validate_object_containment()
   end
@@ -118,8 +120,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     end)
   end
 
-  def validate_actors_match(cng, meta) do
-    attributed_to = meta[:object_data]["attributedTo"] || meta[:object_data]["actor"]
+  def validate_actors_match(cng, object) do
+    attributed_to = object["attributedTo"] || object["actor"]
 
     cng
     |> validate_change(:actor, fn :actor, actor ->
@@ -131,7 +133,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     end)
   end
 
-  def validate_context_match(cng, %{object_data: %{"context" => object_context}}) do
+  def validate_context_match(cng, %{"context" => object_context}) do
     cng
     |> validate_change(:context, fn :context, context ->
       if context == object_context do
@@ -142,5 +144,18 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     end)
   end
 
-  def validate_context_match(cng, _), do: cng
+  def validate_addressing_match(cng, object) do
+    [:to, :cc, :bcc, :bto]
+    |> Enum.reduce(cng, fn field, cng ->
+      object_data = object[to_string(field)]
+
+      validate_change(cng, field, fn field, data ->
+        if data == object_data do
+          []
+        else
+          [{field, "field doesn't match with object (#{inspect(object_data)})"}]
+        end
+      end)
+    end)
+  end
 end
diff --git a/lib/pleroma/web/activity_pub/object_validators/create_note_validator.ex b/lib/pleroma/web/activity_pub/object_validators/create_note_validator.ex
deleted file mode 100644
index a85a0298c..000000000
--- a/lib/pleroma/web/activity_pub/object_validators/create_note_validator.ex
+++ /dev/null
@@ -1,29 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateNoteValidator do
-  use Ecto.Schema
-
-  alias Pleroma.EctoType.ActivityPub.ObjectValidators
-  alias Pleroma.Web.ActivityPub.ObjectValidators.NoteValidator
-
-  import Ecto.Changeset
-
-  @primary_key false
-
-  embedded_schema do
-    field(:id, ObjectValidators.ObjectID, primary_key: true)
-    field(:actor, ObjectValidators.ObjectID)
-    field(:type, :string)
-    field(:to, ObjectValidators.Recipients, default: [])
-    field(:cc, ObjectValidators.Recipients, default: [])
-    field(:bto, ObjectValidators.Recipients, default: [])
-    field(:bcc, ObjectValidators.Recipients, default: [])
-    embeds_one(:object, NoteValidator)
-  end
-
-  def cast_data(data) do
-    cast(%__MODULE__{}, data, __schema__(:fields))
-  end
-end
diff --git a/lib/pleroma/web/activity_pub/object_validators/delete_validator.ex b/lib/pleroma/web/activity_pub/object_validators/delete_validator.ex
index fc1a79a72..7da67bf16 100644
--- a/lib/pleroma/web/activity_pub/object_validators/delete_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/delete_validator.ex
@@ -53,7 +53,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.DeleteValidator do
     Tombstone
     Video
   }
-  def validate_data(cng) do
+  defp validate_data(cng) do
     cng
     |> validate_required([:id, :type, :actor, :to, :cc, :object])
     |> validate_inclusion(:type, ["Delete"])
diff --git a/lib/pleroma/web/activity_pub/object_validators/emoji_react_validator.ex b/lib/pleroma/web/activity_pub/object_validators/emoji_react_validator.ex
index 1906e597e..ec7566515 100644
--- a/lib/pleroma/web/activity_pub/object_validators/emoji_react_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/emoji_react_validator.ex
@@ -70,7 +70,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.EmojiReactValidator do
     end
   end
 
-  def validate_data(data_cng) do
+  defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["EmojiReact"])
     |> validate_required([:id, :type, :object, :actor, :context, :to, :cc, :content])
diff --git a/lib/pleroma/web/activity_pub/object_validators/event_validator.ex b/lib/pleroma/web/activity_pub/object_validators/event_validator.ex
index 2e26726f8..fee2e997a 100644
--- a/lib/pleroma/web/activity_pub/object_validators/event_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/event_validator.ex
@@ -9,6 +9,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.EventValidator do
   alias Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
+  alias Pleroma.Web.ActivityPub.ObjectValidators.TagValidator
   alias Pleroma.Web.ActivityPub.Transmogrifier
 
   import Ecto.Changeset
@@ -23,8 +24,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.EventValidator do
     field(:cc, ObjectValidators.Recipients, default: [])
     field(:bto, ObjectValidators.Recipients, default: [])
     field(:bcc, ObjectValidators.Recipients, default: [])
-    # TODO: Write type
-    field(:tag, {:array, :map}, default: [])
+    embeds_many(:tag, TagValidator)
     field(:type, :string)
 
     field(:name, :string)
@@ -72,8 +72,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.EventValidator do
 
   defp fix(data) do
     data
-    |> CommonFixes.fix_defaults()
-    |> CommonFixes.fix_attribution()
+    |> CommonFixes.fix_actor()
+    |> CommonFixes.fix_object_defaults()
     |> Transmogrifier.fix_emoji()
   end
 
@@ -81,11 +81,12 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.EventValidator do
     data = fix(data)
 
     struct
-    |> cast(data, __schema__(:fields) -- [:attachment])
+    |> cast(data, __schema__(:fields) -- [:attachment, :tag])
     |> cast_embed(:attachment)
+    |> cast_embed(:tag)
   end
 
-  def validate_data(data_cng) do
+  defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Event"])
     |> validate_required([:id, :actor, :attributedTo, :type, :context, :context_id])
diff --git a/lib/pleroma/web/activity_pub/object_validators/follow_validator.ex b/lib/pleroma/web/activity_pub/object_validators/follow_validator.ex
index 6e428bacc..239cee5e7 100644
--- a/lib/pleroma/web/activity_pub/object_validators/follow_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/follow_validator.ex
@@ -27,7 +27,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.FollowValidator do
     |> cast(data, __schema__(:fields))
   end
 
-  def validate_data(cng) do
+  defp validate_data(cng) do
     cng
     |> validate_required([:id, :type, :actor, :to, :cc, :object])
     |> validate_inclusion(:type, ["Follow"])
diff --git a/lib/pleroma/web/activity_pub/object_validators/like_validator.ex b/lib/pleroma/web/activity_pub/object_validators/like_validator.ex
index 30c40b238..509da507b 100644
--- a/lib/pleroma/web/activity_pub/object_validators/like_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/like_validator.ex
@@ -76,7 +76,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.LikeValidator do
     end
   end
 
-  def validate_data(data_cng) do
+  defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Like"])
     |> validate_required([:id, :type, :object, :actor, :context, :to, :cc])
diff --git a/lib/pleroma/web/activity_pub/object_validators/question_validator.ex b/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
index 6b746c997..083d08ec4 100644
--- a/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
@@ -10,6 +10,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator do
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
   alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
   alias Pleroma.Web.ActivityPub.ObjectValidators.QuestionOptionsValidator
+  alias Pleroma.Web.ActivityPub.ObjectValidators.TagValidator
   alias Pleroma.Web.ActivityPub.Transmogrifier
 
   import Ecto.Changeset
@@ -24,8 +25,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator do
     field(:cc, ObjectValidators.Recipients, default: [])
     field(:bto, ObjectValidators.Recipients, default: [])
     field(:bcc, ObjectValidators.Recipients, default: [])
-    # TODO: Write type
-    field(:tag, {:array, :map}, default: [])
+    embeds_many(:tag, TagValidator)
     field(:type, :string)
     field(:content, :string)
     field(:context, :string)
@@ -83,8 +83,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator do
 
   defp fix(data) do
     data
-    |> CommonFixes.fix_defaults()
-    |> CommonFixes.fix_attribution()
+    |> CommonFixes.fix_actor()
+    |> CommonFixes.fix_object_defaults()
     |> Transmogrifier.fix_emoji()
     |> fix_closed()
   end
@@ -93,13 +93,14 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator do
     data = fix(data)
 
     struct
-    |> cast(data, __schema__(:fields) -- [:anyOf, :oneOf, :attachment])
+    |> cast(data, __schema__(:fields) -- [:anyOf, :oneOf, :attachment, :tag])
     |> cast_embed(:attachment)
     |> cast_embed(:anyOf)
     |> cast_embed(:oneOf)
+    |> cast_embed(:tag)
   end
 
-  def validate_data(data_cng) do
+  defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Question"])
     |> validate_required([:id, :actor, :attributedTo, :type, :context, :context_id])
diff --git a/lib/pleroma/web/activity_pub/object_validators/tag_validator.ex b/lib/pleroma/web/activity_pub/object_validators/tag_validator.ex
new file mode 100644
index 000000000..751021585
--- /dev/null
+++ b/lib/pleroma/web/activity_pub/object_validators/tag_validator.ex
@@ -0,0 +1,77 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.ObjectValidators.TagValidator do
+  use Ecto.Schema
+
+  alias Pleroma.EctoType.ActivityPub.ObjectValidators
+
+  import Ecto.Changeset
+
+  @primary_key false
+  embedded_schema do
+    # Common
+    field(:type, :string)
+    field(:name, :string)
+
+    # Mention, Hashtag
+    field(:href, ObjectValidators.Uri)
+
+    # Emoji
+    embeds_one :icon, IconObjectValidator, primary_key: false do
+      field(:type, :string)
+      field(:url, ObjectValidators.Uri)
+    end
+
+    field(:updated, ObjectValidators.DateTime)
+    field(:id, ObjectValidators.Uri)
+  end
+
+  def cast_and_validate(data) do
+    data
+    |> cast_data()
+  end
+
+  def cast_data(data) do
+    %__MODULE__{}
+    |> changeset(data)
+  end
+
+  def changeset(struct, %{"type" => "Mention"} = data) do
+    struct
+    |> cast(data, [:type, :name, :href])
+    |> validate_required([:type, :href])
+  end
+
+  def changeset(struct, %{"type" => "Hashtag", "name" => name} = data) do
+    name =
+      cond do
+        "#" <> name -> name
+        name -> name
+      end
+      |> String.downcase()
+
+    data = Map.put(data, "name", name)
+
+    struct
+    |> cast(data, [:type, :name, :href])
+    |> validate_required([:type, :name])
+  end
+
+  def changeset(struct, %{"type" => "Emoji"} = data) do
+    data = Map.put(data, "name", String.trim(data["name"], ":"))
+
+    struct
+    |> cast(data, [:type, :name, :updated, :id])
+    |> cast_embed(:icon, with: &icon_changeset/2)
+    |> validate_required([:type, :name, :icon])
+  end
+
+  def icon_changeset(struct, data) do
+    struct
+    |> cast(data, [:type, :url])
+    |> validate_inclusion(:type, ~w[Image])
+    |> validate_required([:type, :url])
+  end
+end
diff --git a/lib/pleroma/web/activity_pub/object_validators/undo_validator.ex b/lib/pleroma/web/activity_pub/object_validators/undo_validator.ex
index 783a79ddb..e8af60ffa 100644
--- a/lib/pleroma/web/activity_pub/object_validators/undo_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/undo_validator.ex
@@ -38,7 +38,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.UndoValidator do
     |> cast(data, __schema__(:fields))
   end
 
-  def validate_data(data_cng) do
+  defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Undo"])
     |> validate_required([:id, :type, :object, :actor, :to, :cc])
diff --git a/lib/pleroma/web/activity_pub/object_validators/update_validator.ex b/lib/pleroma/web/activity_pub/object_validators/update_validator.ex
index a66d41400..6bb1dc7fa 100644
--- a/lib/pleroma/web/activity_pub/object_validators/update_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/update_validator.ex
@@ -28,7 +28,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.UpdateValidator do
     |> cast(data, __schema__(:fields))
   end
 
-  def validate_data(cng) do
+  defp validate_data(cng) do
     cng
     |> validate_required([:id, :type, :actor, :to, :cc, :object])
     |> validate_inclusion(:type, ["Update"])
diff --git a/lib/pleroma/web/activity_pub/pipeline.ex b/lib/pleroma/web/activity_pub/pipeline.ex
index 195596f94..0d6e8aad2 100644
--- a/lib/pleroma/web/activity_pub/pipeline.ex
+++ b/lib/pleroma/web/activity_pub/pipeline.ex
@@ -7,6 +7,7 @@ defmodule Pleroma.Web.ActivityPub.Pipeline do
   alias Pleroma.Config
   alias Pleroma.Object
   alias Pleroma.Repo
+  alias Pleroma.Utils
   alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Web.ActivityPub.MRF
   alias Pleroma.Web.ActivityPub.ObjectValidator
@@ -14,19 +15,19 @@ defmodule Pleroma.Web.ActivityPub.Pipeline do
   alias Pleroma.Web.ActivityPub.Visibility
   alias Pleroma.Web.Federator
 
-  @side_effects Config.get([:pipeline, :side_effects], SideEffects)
-  @federator Config.get([:pipeline, :federator], Federator)
-  @object_validator Config.get([:pipeline, :object_validator], ObjectValidator)
-  @mrf Config.get([:pipeline, :mrf], MRF)
-  @activity_pub Config.get([:pipeline, :activity_pub], ActivityPub)
-  @config Config.get([:pipeline, :config], Config)
+  defp side_effects, do: Config.get([:pipeline, :side_effects], SideEffects)
+  defp federator, do: Config.get([:pipeline, :federator], Federator)
+  defp object_validator, do: Config.get([:pipeline, :object_validator], ObjectValidator)
+  defp mrf, do: Config.get([:pipeline, :mrf], MRF)
+  defp activity_pub, do: Config.get([:pipeline, :activity_pub], ActivityPub)
+  defp config, do: Config.get([:pipeline, :config], Config)
 
   @spec common_pipeline(map(), keyword()) ::
           {:ok, Activity.t() | Object.t(), keyword()} | {:error, any()}
   def common_pipeline(object, meta) do
-    case Repo.transaction(fn -> do_common_pipeline(object, meta) end) do
+    case Repo.transaction(fn -> do_common_pipeline(object, meta) end, Utils.query_timeout()) do
       {:ok, {:ok, activity, meta}} ->
-        @side_effects.handle_after_transaction(meta)
+        side_effects().handle_after_transaction(meta)
         {:ok, activity, meta}
 
       {:ok, value} ->
@@ -40,19 +41,17 @@ defmodule Pleroma.Web.ActivityPub.Pipeline do
     end
   end
 
-  def do_common_pipeline(object, meta) do
-    with {_, {:ok, validated_object, meta}} <-
-           {:validate_object, @object_validator.validate(object, meta)},
-         {_, {:ok, mrfd_object, meta}} <-
-           {:mrf_object, @mrf.pipeline_filter(validated_object, meta)},
-         {_, {:ok, activity, meta}} <-
-           {:persist_object, @activity_pub.persist(mrfd_object, meta)},
-         {_, {:ok, activity, meta}} <-
-           {:execute_side_effects, @side_effects.handle(activity, meta)},
-         {_, {:ok, _}} <- {:federation, maybe_federate(activity, meta)} do
-      {:ok, activity, meta}
+  def do_common_pipeline(%{__struct__: _}, _meta), do: {:error, :is_struct}
+
+  def do_common_pipeline(message, meta) do
+    with {_, {:ok, message, meta}} <- {:validate, object_validator().validate(message, meta)},
+         {_, {:ok, message, meta}} <- {:mrf, mrf().pipeline_filter(message, meta)},
+         {_, {:ok, message, meta}} <- {:persist, activity_pub().persist(message, meta)},
+         {_, {:ok, message, meta}} <- {:side_effects, side_effects().handle(message, meta)},
+         {_, {:ok, _}} <- {:federation, maybe_federate(message, meta)} do
+      {:ok, message, meta}
     else
-      {:mrf_object, {:reject, message, _}} -> {:reject, message}
+      {:mrf, {:reject, message, _}} -> {:reject, message}
       e -> {:error, e}
     end
   end
@@ -61,7 +60,7 @@ defmodule Pleroma.Web.ActivityPub.Pipeline do
 
   defp maybe_federate(%Activity{} = activity, meta) do
     with {:ok, local} <- Keyword.fetch(meta, :local) do
-      do_not_federate = meta[:do_not_federate] || !@config.get([:instance, :federating])
+      do_not_federate = meta[:do_not_federate] || !config().get([:instance, :federating])
 
       if !do_not_federate and local and not Visibility.is_local_public?(activity) do
         activity =
@@ -71,7 +70,7 @@ defmodule Pleroma.Web.ActivityPub.Pipeline do
             activity
           end
 
-        @federator.publish(activity)
+        federator().publish(activity)
         {:ok, :federated}
       else
         {:ok, :not_federated}
diff --git a/lib/pleroma/web/activity_pub/publisher.ex b/lib/pleroma/web/activity_pub/publisher.ex
index b12b2fc24..590beef64 100644
--- a/lib/pleroma/web/activity_pub/publisher.ex
+++ b/lib/pleroma/web/activity_pub/publisher.ex
@@ -272,7 +272,7 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
       },
       %{
         "rel" => "http://ostatus.org/schema/1.0/subscribe",
-        "template" => "#{Pleroma.Web.base_url()}/ostatus_subscribe?acct={uri}"
+        "template" => "#{Pleroma.Web.Endpoint.url()}/ostatus_subscribe?acct={uri}"
       }
     ]
   end
diff --git a/lib/pleroma/web/activity_pub/side_effects.ex b/lib/pleroma/web/activity_pub/side_effects.ex
index 0b9a9f0c5..674356d9a 100644
--- a/lib/pleroma/web/activity_pub/side_effects.ex
+++ b/lib/pleroma/web/activity_pub/side_effects.ex
@@ -203,6 +203,19 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
         Object.increase_replies_count(in_reply_to)
       end
 
+      reply_depth = (meta[:depth] || 0) + 1
+
+      # FIXME: Force inReplyTo to replies
+      if Pleroma.Web.Federator.allowed_thread_distance?(reply_depth) and
+           object.data["replies"] != nil do
+        for reply_id <- object.data["replies"] do
+          Pleroma.Workers.RemoteFetcherWorker.enqueue("fetch_remote", %{
+            "id" => reply_id,
+            "depth" => reply_depth
+          })
+        end
+      end
+
       ConcurrentLimiter.limit(Pleroma.Web.RichMedia.Helpers, fn ->
         Task.start(fn -> Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity) end)
       end)
@@ -276,10 +289,10 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
     result =
       case deleted_object do
         %Object{} ->
-          with {:ok, deleted_object, activity} <- Object.delete(deleted_object),
+          with {:ok, deleted_object, _activity} <- Object.delete(deleted_object),
                {_, actor} when is_binary(actor) <- {:actor, deleted_object.data["actor"]},
                %User{} = user <- User.get_cached_by_ap_id(actor) do
-            User.remove_pinnned_activity(user, activity)
+            User.remove_pinned_object_id(user, deleted_object.data["id"])
 
             {:ok, user} = ActivityPub.decrease_note_count_if_public(user, deleted_object)
 
@@ -312,6 +325,63 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
     end
   end
 
+  # Tasks this handles:
+  # - adds pin to user
+  # - removes expiration job for pinned activity, if was set for expiration
+  @impl true
+  def handle(%{data: %{"type" => "Add"} = data} = object, meta) do
+    with %User{} = user <- User.get_cached_by_ap_id(data["actor"]),
+         {:ok, _user} <- User.add_pinned_object_id(user, data["object"]) do
+      # if pinned activity was scheduled for deletion, we remove job
+      if expiration = Pleroma.Workers.PurgeExpiredActivity.get_expiration(meta[:activity_id]) do
+        Oban.cancel_job(expiration.id)
+      end
+
+      {:ok, object, meta}
+    else
+      nil ->
+        {:error, :user_not_found}
+
+      {:error, changeset} ->
+        if changeset.errors[:pinned_objects] do
+          {:error, :pinned_statuses_limit_reached}
+        else
+          changeset.errors
+        end
+    end
+  end
+
+  # Tasks this handles:
+  # - removes pin from user
+  # - removes corresponding Add activity
+  # - if activity had expiration, recreates activity expiration job
+  @impl true
+  def handle(%{data: %{"type" => "Remove"} = data} = object, meta) do
+    with %User{} = user <- User.get_cached_by_ap_id(data["actor"]),
+         {:ok, _user} <- User.remove_pinned_object_id(user, data["object"]) do
+      data["object"]
+      |> Activity.add_by_params_query(user.ap_id, user.featured_address)
+      |> Repo.delete_all()
+
+      # if pinned activity was scheduled for deletion, we reschedule it for deletion
+      if meta[:expires_at] do
+        # MRF.ActivityExpirationPolicy used UTC timestamps for expires_at in original implementation
+        {:ok, expires_at} =
+          Pleroma.EctoType.ActivityPub.ObjectValidators.DateTime.cast(meta[:expires_at])
+
+        Pleroma.Workers.PurgeExpiredActivity.enqueue(%{
+          activity_id: meta[:activity_id],
+          expires_at: expires_at
+        })
+      end
+
+      {:ok, object, meta}
+    else
+      nil -> {:error, :user_not_found}
+      error -> error
+    end
+  end
+
   # Nothing to do
   @impl true
   def handle(object, meta) do
@@ -366,7 +436,7 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
   end
 
   def handle_object_creation(%{"type" => objtype} = object, meta)
-      when objtype in ~w[Audio Video Question Event Article] do
+      when objtype in ~w[Audio Video Question Event Article Note] do
     with {:ok, object, meta} <- Pipeline.common_pipeline(object, meta) do
       {:ok, object, meta}
     end
diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index 4d9a5617e..51c0cc860 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -32,19 +32,17 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   """
   def fix_object(object, options \\ []) do
     object
-    |> strip_internal_fields
-    |> fix_actor
-    |> fix_url
-    |> fix_attachments
-    |> fix_context
+    |> strip_internal_fields()
+    |> fix_actor()
+    |> fix_url()
+    |> fix_attachments()
+    |> fix_context()
     |> fix_in_reply_to(options)
-    |> fix_emoji
-    |> fix_tag
-    |> set_sensitive
-    |> fix_content_map
-    |> fix_addressing
-    |> fix_summary
-    |> fix_type(options)
+    |> fix_emoji()
+    |> fix_tag()
+    |> fix_content_map()
+    |> fix_addressing()
+    |> fix_summary()
   end
 
   def fix_summary(%{"summary" => nil} = object) do
@@ -73,17 +71,21 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     end
   end
 
-  def fix_explicit_addressing(
-        %{"to" => to, "cc" => cc} = object,
-        explicit_mentions,
-        follower_collection
-      ) do
-    explicit_to = Enum.filter(to, fn x -> x in explicit_mentions end)
+  # if directMessage flag is set to true, leave the addressing alone
+  def fix_explicit_addressing(%{"directMessage" => true} = object, _follower_collection),
+    do: object
 
+  def fix_explicit_addressing(%{"to" => to, "cc" => cc} = object, follower_collection) do
+    explicit_mentions =
+      Utils.determine_explicit_mentions(object) ++
+        [Pleroma.Constants.as_public(), follower_collection]
+
+    explicit_to = Enum.filter(to, fn x -> x in explicit_mentions end)
     explicit_cc = Enum.filter(to, fn x -> x not in explicit_mentions end)
 
     final_cc =
       (cc ++ explicit_cc)
+      |> Enum.filter(& &1)
       |> Enum.reject(fn x -> String.ends_with?(x, "/followers") and x != follower_collection end)
       |> Enum.uniq()
 
@@ -92,29 +94,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     |> Map.put("cc", final_cc)
   end
 
-  def fix_explicit_addressing(object, _explicit_mentions, _followers_collection), do: object
-
-  # if directMessage flag is set to true, leave the addressing alone
-  def fix_explicit_addressing(%{"directMessage" => true} = object), do: object
-
-  def fix_explicit_addressing(object) do
-    explicit_mentions = Utils.determine_explicit_mentions(object)
-
-    %User{follower_address: follower_collection} =
-      object
-      |> Containment.get_actor()
-      |> User.get_cached_by_ap_id()
-
-    explicit_mentions =
-      explicit_mentions ++
-        [
-          Pleroma.Constants.as_public(),
-          follower_collection
-        ]
-
-    fix_explicit_addressing(object, explicit_mentions, follower_collection)
-  end
-
   # if as:Public is addressed, then make sure the followers collection is also addressed
   # so that the activities will be delivered to local users.
   def fix_implicit_addressing(%{"to" => to, "cc" => cc} = object, followers_collection) do
@@ -138,19 +117,19 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     end
   end
 
-  def fix_implicit_addressing(object, _), do: object
-
   def fix_addressing(object) do
-    {:ok, %User{} = user} = User.get_or_fetch_by_ap_id(object["actor"])
-    followers_collection = User.ap_followers(user)
+    {:ok, %User{follower_address: follower_collection}} =
+      object
+      |> Containment.get_actor()
+      |> User.get_or_fetch_by_ap_id()
 
     object
     |> fix_addressing_list("to")
     |> fix_addressing_list("cc")
     |> fix_addressing_list("bto")
     |> fix_addressing_list("bcc")
-    |> fix_explicit_addressing()
-    |> fix_implicit_addressing(followers_collection)
+    |> fix_explicit_addressing(follower_collection)
+    |> fix_implicit_addressing(follower_collection)
   end
 
   def fix_actor(%{"attributedTo" => actor} = object) do
@@ -224,10 +203,17 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
         media_type =
           cond do
-            is_map(url) && MIME.valid?(url["mediaType"]) -> url["mediaType"]
-            MIME.valid?(data["mediaType"]) -> data["mediaType"]
-            MIME.valid?(data["mimeType"]) -> data["mimeType"]
-            true -> nil
+            is_map(url) && MIME.extensions(url["mediaType"]) != [] ->
+              url["mediaType"]
+
+            is_bitstring(data["mediaType"]) && MIME.extensions(data["mediaType"]) != [] ->
+              data["mediaType"]
+
+            is_bitstring(data["mimeType"]) && MIME.extensions(data["mimeType"]) != [] ->
+              data["mimeType"]
+
+            true ->
+              nil
           end
 
         href =
@@ -245,6 +231,8 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
               "type" => Map.get(url || %{}, "type", "Link")
             }
             |> Maps.put_if_present("mediaType", media_type)
+            |> Maps.put_if_present("width", (url || %{})["width"] || data["width"])
+            |> Maps.put_if_present("height", (url || %{})["height"] || data["height"])
 
           %{
             "url" => [attachment_url],
@@ -315,10 +303,9 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     tags =
       tag
       |> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
-      |> Enum.map(fn %{"name" => name} ->
-        name
-        |> String.slice(1..-1)
-        |> String.downcase()
+      |> Enum.map(fn
+        %{"name" => "#" <> hashtag} -> String.downcase(hashtag)
+        %{"name" => hashtag} -> String.downcase(hashtag)
       end)
 
     Map.put(object, "tag", tag ++ tags)
@@ -342,19 +329,18 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def fix_content_map(object), do: object
 
-  def fix_type(object, options \\ [])
+  defp fix_type(%{"type" => "Note", "inReplyTo" => reply_id, "name" => _} = object, options)
+       when is_binary(reply_id) do
+    options = Keyword.put(options, :fetch, true)
 
-  def fix_type(%{"inReplyTo" => reply_id, "name" => _} = object, options)
-      when is_binary(reply_id) do
-    with true <- Federator.allowed_thread_distance?(options[:depth]),
-         {:ok, %{data: %{"type" => "Question"} = _} = _} <- get_obj_helper(reply_id, options) do
+    with %Object{data: %{"type" => "Question"}} <- Object.normalize(reply_id, options) do
       Map.put(object, "type", "Answer")
     else
       _ -> object
     end
   end
 
-  def fix_type(object, _), do: object
+  defp fix_type(object, _options), do: object
 
   # Reduce the object list to find the reported user.
   defp get_reported(objects) do
@@ -425,10 +411,9 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   # - tags
   # - emoji
   def handle_incoming(
-        %{"type" => "Create", "object" => %{"type" => objtype} = object} = data,
+        %{"type" => "Create", "object" => %{"type" => "Page"} = object} = data,
         options
-      )
-      when objtype in ~w{Note Page} do
+      ) do
     actor = Containment.get_actor(data)
 
     with nil <- Activity.get_create_by_object_ap_id(object["id"]),
@@ -520,14 +505,23 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def handle_incoming(
         %{"type" => "Create", "object" => %{"type" => objtype, "id" => obj_id}} = data,
-        _options
+        options
       )
-      when objtype in ~w{Question Answer ChatMessage Audio Video Event Article} do
-    data = Map.put(data, "object", strip_internal_fields(data["object"]))
+      when objtype in ~w{Question Answer ChatMessage Audio Video Event Article Note} do
+    fetch_options = Keyword.put(options, :depth, (options[:depth] || 0) + 1)
+
+    object =
+      data["object"]
+      |> strip_internal_fields()
+      |> fix_type(fetch_options)
+      |> fix_in_reply_to(fetch_options)
+
+    data = Map.put(data, "object", object)
+    options = Keyword.put(options, :local, false)
 
     with {:ok, %User{}} <- ObjectValidator.fetch_actor(data),
          nil <- Activity.get_create_by_object_ap_id(obj_id),
-         {:ok, activity, _} <- Pipeline.common_pipeline(data, local: false) do
+         {:ok, activity, _} <- Pipeline.common_pipeline(data, options) do
       {:ok, activity}
     else
       %Activity{} = activity -> {:ok, activity}
@@ -536,7 +530,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   end
 
   def handle_incoming(%{"type" => type} = data, _options)
-      when type in ~w{Like EmojiReact Announce} do
+      when type in ~w{Like EmojiReact Announce Add Remove} do
     with :ok <- ObjectValidator.fetch_actor_and_object(data),
          {:ok, activity, _meta} <-
            Pipeline.common_pipeline(data, local: false) do
@@ -566,7 +560,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
            Pipeline.common_pipeline(data, local: false) do
       {:ok, activity}
     else
-      {:error, {:validate_object, _}} = e ->
+      {:error, {:validate, _}} = e ->
         # Check if we have a create activity for this
         with {:ok, object_id} <- ObjectValidators.ObjectID.cast(data["object"]),
              %Activity{data: %{"actor" => actor}} <-
@@ -742,7 +736,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   # Prepares the object of an outgoing create activity.
   def prepare_object(object) do
     object
-    |> set_sensitive
     |> add_hashtags
     |> add_mention_tags
     |> add_emoji_tags
@@ -933,15 +926,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     Map.put(object, "conversation", object["context"])
   end
 
-  def set_sensitive(%{"sensitive" => _} = object) do
-    object
-  end
-
-  def set_sensitive(object) do
-    tags = object["tag"] || []
-    Map.put(object, "sensitive", "nsfw" in tags)
-  end
-
   def set_type(%{"type" => "Answer"} = object) do
     Map.put(object, "type", "Note")
   end
@@ -961,7 +945,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
       object
       |> Map.get("attachment", [])
       |> Enum.map(fn data ->
-        [%{"mediaType" => media_type, "href" => href} | _] = data["url"]
+        [%{"mediaType" => media_type, "href" => href} = url | _] = data["url"]
 
         %{
           "url" => href,
@@ -969,6 +953,9 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
           "name" => data["name"],
           "type" => "Document"
         }
+        |> Maps.put_if_present("width", url["width"])
+        |> Maps.put_if_present("height", url["height"])
+        |> Maps.put_if_present("blurhash", data["blurhash"])
       end)
 
     Map.put(object, "attachment", attachments)
@@ -1012,6 +999,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     with %User{local: false} = user <- User.get_cached_by_ap_id(ap_id),
          {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id),
          {:ok, user} <- update_user(user, data) do
+      {:ok, _pid} = Task.start(fn -> ActivityPub.pinned_fetch_task(user) end)
       TransmogrifierWorker.enqueue("user_upgrade", %{"user_id" => user.id})
       {:ok, user}
     else
diff --git a/lib/pleroma/web/activity_pub/utils.ex b/lib/pleroma/web/activity_pub/utils.ex
index a4dc469dc..1df53f79a 100644
--- a/lib/pleroma/web/activity_pub/utils.ex
+++ b/lib/pleroma/web/activity_pub/utils.ex
@@ -12,7 +12,6 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   alias Pleroma.Object
   alias Pleroma.Repo
   alias Pleroma.User
-  alias Pleroma.Web
   alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Web.ActivityPub.Visibility
   alias Pleroma.Web.AdminAPI.AccountView
@@ -38,6 +37,8 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   @supported_report_states ~w(open closed resolved)
   @valid_visibilities ~w(public unlisted private direct)
 
+  def as_local_public, do: Endpoint.url() <> "/#Public"
+
   # Some implementations send the actor URI as the actor field, others send the entire actor object,
   # so figure out what the actor's URI is based on what we have.
   def get_ap_id(%{"id" => id} = _), do: id
@@ -96,8 +97,11 @@ defmodule Pleroma.Web.ActivityPub.Utils do
         !label_in_collection?(ap_id, params["cc"])
 
     if need_splice? do
-      cc_list = extract_list(params["cc"])
-      Map.put(params, "cc", [ap_id | cc_list])
+      cc = [ap_id | extract_list(params["cc"])]
+
+      params
+      |> Map.put("cc", cc)
+      |> Maps.safe_put_in(["object", "cc"], cc)
     else
       params
     end
@@ -107,7 +111,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
     %{
       "@context" => [
         "https://www.w3.org/ns/activitystreams",
-        "#{Web.base_url()}/schemas/litepub-0.1.jsonld",
+        "#{Endpoint.url()}/schemas/litepub-0.1.jsonld",
         %{
           "@language" => "und"
         }
@@ -132,7 +136,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   end
 
   def generate_id(type) do
-    "#{Web.base_url()}/#{type}/#{UUID.generate()}"
+    "#{Endpoint.url()}/#{type}/#{UUID.generate()}"
   end
 
   def get_notified_from_object(%{"type" => type} = object) when type in @supported_object_types do
diff --git a/lib/pleroma/web/activity_pub/views/user_view.ex b/lib/pleroma/web/activity_pub/views/user_view.ex
index 8adc9878a..344da19d3 100644
--- a/lib/pleroma/web/activity_pub/views/user_view.ex
+++ b/lib/pleroma/web/activity_pub/views/user_view.ex
@@ -6,8 +6,10 @@ defmodule Pleroma.Web.ActivityPub.UserView do
   use Pleroma.Web, :view
 
   alias Pleroma.Keys
+  alias Pleroma.Object
   alias Pleroma.Repo
   alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.ObjectView
   alias Pleroma.Web.ActivityPub.Transmogrifier
   alias Pleroma.Web.ActivityPub.Utils
   alias Pleroma.Web.Endpoint
@@ -97,6 +99,7 @@ defmodule Pleroma.Web.ActivityPub.UserView do
       "followers" => "#{user.ap_id}/followers",
       "inbox" => "#{user.ap_id}/inbox",
       "outbox" => "#{user.ap_id}/outbox",
+      "featured" => "#{user.ap_id}/collections/featured",
       "preferredUsername" => user.nickname,
       "name" => user.name,
       "summary" => user.bio,
@@ -245,6 +248,25 @@ defmodule Pleroma.Web.ActivityPub.UserView do
     |> Map.merge(pagination)
   end
 
+  def render("featured.json", %{
+        user: %{featured_address: featured_address, pinned_objects: pinned_objects}
+      }) do
+    objects =
+      pinned_objects
+      |> Enum.sort_by(fn {_, pinned_at} -> pinned_at end, &>=/2)
+      |> Enum.map(fn {id, _} ->
+        ObjectView.render("object.json", %{object: Object.get_cached_by_ap_id(id)})
+      end)
+
+    %{
+      "id" => featured_address,
+      "type" => "OrderedCollection",
+      "orderedItems" => objects,
+      "totalItems" => length(objects)
+    }
+    |> Map.merge(Utils.make_json_ld_header())
+  end
+
   defp maybe_put_total_items(map, false, _total), do: map
 
   defp maybe_put_total_items(map, true, total) do
diff --git a/lib/pleroma/web/activity_pub/visibility.ex b/lib/pleroma/web/activity_pub/visibility.ex
index 00234c0b0..2be59144d 100644
--- a/lib/pleroma/web/activity_pub/visibility.ex
+++ b/lib/pleroma/web/activity_pub/visibility.ex
@@ -20,14 +20,14 @@ defmodule Pleroma.Web.ActivityPub.Visibility do
 
   def is_public?(data) do
     Utils.label_in_message?(Pleroma.Constants.as_public(), data) or
-      Utils.label_in_message?(Pleroma.Constants.as_local_public(), data)
+      Utils.label_in_message?(Utils.as_local_public(), data)
   end
 
   def is_local_public?(%Object{data: data}), do: is_local_public?(data)
   def is_local_public?(%Activity{data: data}), do: is_local_public?(data)
 
   def is_local_public?(data) do
-    Utils.label_in_message?(Pleroma.Constants.as_local_public(), data) and
+    Utils.label_in_message?(Utils.as_local_public(), data) and
       not Utils.label_in_message?(Pleroma.Constants.as_public(), data)
   end
 
@@ -127,7 +127,7 @@ defmodule Pleroma.Web.ActivityPub.Visibility do
       Pleroma.Constants.as_public() in cc ->
         "unlisted"
 
-      Pleroma.Constants.as_local_public() in to ->
+      Utils.as_local_public() in to ->
         "local"
 
       # this should use the sql for the object's activity
diff --git a/lib/pleroma/web/admin_api/controllers/o_auth_app_controller.ex b/lib/pleroma/web/admin_api/controllers/o_auth_app_controller.ex
index 005fe67e2..51b17d392 100644
--- a/lib/pleroma/web/admin_api/controllers/o_auth_app_controller.ex
+++ b/lib/pleroma/web/admin_api/controllers/o_auth_app_controller.ex
@@ -13,7 +13,6 @@ defmodule Pleroma.Web.AdminAPI.OAuthAppController do
   require Logger
 
   plug(Pleroma.Web.ApiSpec.CastAndValidate)
-  plug(:put_view, Pleroma.Web.MastodonAPI.AppView)
 
   plug(
     OAuthScopesPlug,
diff --git a/lib/pleroma/web/admin_api/controllers/user_controller.ex b/lib/pleroma/web/admin_api/controllers/user_controller.ex
index 65bc63cb9..d3e4c18a3 100644
--- a/lib/pleroma/web/admin_api/controllers/user_controller.ex
+++ b/lib/pleroma/web/admin_api/controllers/user_controller.ex
@@ -13,16 +13,17 @@ defmodule Pleroma.Web.AdminAPI.UserController do
   alias Pleroma.Web.ActivityPub.Builder
   alias Pleroma.Web.ActivityPub.Pipeline
   alias Pleroma.Web.AdminAPI
-  alias Pleroma.Web.AdminAPI.AccountView
   alias Pleroma.Web.AdminAPI.Search
   alias Pleroma.Web.Plugs.OAuthScopesPlug
 
   @users_page_size 50
 
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+
   plug(
     OAuthScopesPlug,
     %{scopes: ["admin:read:accounts"]}
-    when action in [:list, :show]
+    when action in [:index, :show]
   )
 
   plug(
@@ -44,13 +45,19 @@ defmodule Pleroma.Web.AdminAPI.UserController do
     when action in [:follow, :unfollow]
   )
 
+  plug(:put_view, Pleroma.Web.AdminAPI.AccountView)
+
   action_fallback(AdminAPI.FallbackController)
 
-  def delete(conn, %{"nickname" => nickname}) do
-    delete(conn, %{"nicknames" => [nickname]})
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.Admin.UserOperation
+
+  def delete(conn, %{nickname: nickname}) do
+    conn
+    |> Map.put(:body_params, %{nicknames: [nickname]})
+    |> delete(%{})
   end
 
-  def delete(%{assigns: %{user: admin}} = conn, %{"nicknames" => nicknames}) do
+  def delete(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = conn, _) do
     users = Enum.map(nicknames, &User.get_cached_by_nickname/1)
 
     Enum.each(users, fn user ->
@@ -67,10 +74,16 @@ defmodule Pleroma.Web.AdminAPI.UserController do
     json(conn, nicknames)
   end
 
-  def follow(%{assigns: %{user: admin}} = conn, %{
-        "follower" => follower_nick,
-        "followed" => followed_nick
-      }) do
+  def follow(
+        %{
+          assigns: %{user: admin},
+          body_params: %{
+            follower: follower_nick,
+            followed: followed_nick
+          }
+        } = conn,
+        _
+      ) do
     with %User{} = follower <- User.get_cached_by_nickname(follower_nick),
          %User{} = followed <- User.get_cached_by_nickname(followed_nick) do
       User.follow(follower, followed)
@@ -86,10 +99,16 @@ defmodule Pleroma.Web.AdminAPI.UserController do
     json(conn, "ok")
   end
 
-  def unfollow(%{assigns: %{user: admin}} = conn, %{
-        "follower" => follower_nick,
-        "followed" => followed_nick
-      }) do
+  def unfollow(
+        %{
+          assigns: %{user: admin},
+          body_params: %{
+            follower: follower_nick,
+            followed: followed_nick
+          }
+        } = conn,
+        _
+      ) do
     with %User{} = follower <- User.get_cached_by_nickname(follower_nick),
          %User{} = followed <- User.get_cached_by_nickname(followed_nick) do
       User.unfollow(follower, followed)
@@ -105,9 +124,10 @@ defmodule Pleroma.Web.AdminAPI.UserController do
     json(conn, "ok")
   end
 
-  def create(%{assigns: %{user: admin}} = conn, %{"users" => users}) do
+  def create(%{assigns: %{user: admin}, body_params: %{users: users}} = conn, _) do
     changesets =
-      Enum.map(users, fn %{"nickname" => nickname, "email" => email, "password" => password} ->
+      users
+      |> Enum.map(fn %{nickname: nickname, email: email, password: password} ->
         user_data = %{
           nickname: nickname,
           name: nickname,
@@ -124,52 +144,49 @@ defmodule Pleroma.Web.AdminAPI.UserController do
       end)
 
     case Pleroma.Repo.transaction(changesets) do
-      {:ok, users} ->
-        res =
-          users
+      {:ok, users_map} ->
+        users =
+          users_map
           |> Map.values()
           |> Enum.map(fn user ->
             {:ok, user} = User.post_register_action(user)
 
             user
           end)
-          |> Enum.map(&AccountView.render("created.json", %{user: &1}))
 
         ModerationLog.insert_log(%{
           actor: admin,
-          subjects: Map.values(users),
+          subjects: users,
           action: "create"
         })
 
-        json(conn, res)
+        render(conn, "created_many.json", users: users)
 
       {:error, id, changeset, _} ->
-        res =
+        changesets =
           Enum.map(changesets.operations, fn
-            {current_id, {:changeset, _current_changeset, _}} when current_id == id ->
-              AccountView.render("create-error.json", %{changeset: changeset})
+            {^id, {:changeset, _current_changeset, _}} ->
+              changeset
 
             {_, {:changeset, current_changeset, _}} ->
-              AccountView.render("create-error.json", %{changeset: current_changeset})
+              current_changeset
           end)
 
         conn
         |> put_status(:conflict)
-        |> json(res)
+        |> render("create_errors.json", changesets: changesets)
     end
   end
 
-  def show(%{assigns: %{user: admin}} = conn, %{"nickname" => nickname}) do
+  def show(%{assigns: %{user: admin}} = conn, %{nickname: nickname}) do
     with %User{} = user <- User.get_cached_by_nickname_or_id(nickname, for: admin) do
-      conn
-      |> put_view(AccountView)
-      |> render("show.json", %{user: user})
+      render(conn, "show.json", %{user: user})
     else
       _ -> {:error, :not_found}
     end
   end
 
-  def toggle_activation(%{assigns: %{user: admin}} = conn, %{"nickname" => nickname}) do
+  def toggle_activation(%{assigns: %{user: admin}} = conn, %{nickname: nickname}) do
     user = User.get_cached_by_nickname(nickname)
 
     {:ok, updated_user} = User.set_activation(user, !user.is_active)
@@ -182,12 +199,10 @@ defmodule Pleroma.Web.AdminAPI.UserController do
       action: action
     })
 
-    conn
-    |> put_view(AccountView)
-    |> render("show.json", %{user: updated_user})
+    render(conn, "show.json", user: updated_user)
   end
 
-  def activate(%{assigns: %{user: admin}} = conn, %{"nicknames" => nicknames}) do
+  def activate(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = conn, _) do
     users = Enum.map(nicknames, &User.get_cached_by_nickname/1)
     {:ok, updated_users} = User.set_activation(users, true)
 
@@ -197,12 +212,10 @@ defmodule Pleroma.Web.AdminAPI.UserController do
       action: "activate"
     })
 
-    conn
-    |> put_view(AccountView)
-    |> render("index.json", %{users: Keyword.values(updated_users)})
+    render(conn, "index.json", users: Keyword.values(updated_users))
   end
 
-  def deactivate(%{assigns: %{user: admin}} = conn, %{"nicknames" => nicknames}) do
+  def deactivate(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = conn, _) do
     users = Enum.map(nicknames, &User.get_cached_by_nickname/1)
     {:ok, updated_users} = User.set_activation(users, false)
 
@@ -212,12 +225,10 @@ defmodule Pleroma.Web.AdminAPI.UserController do
       action: "deactivate"
     })
 
-    conn
-    |> put_view(AccountView)
-    |> render("index.json", %{users: Keyword.values(updated_users)})
+    render(conn, "index.json", users: Keyword.values(updated_users))
   end
 
-  def approve(%{assigns: %{user: admin}} = conn, %{"nicknames" => nicknames}) do
+  def approve(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = conn, _) do
     users = Enum.map(nicknames, &User.get_cached_by_nickname/1)
     {:ok, updated_users} = User.approve(users)
 
@@ -227,36 +238,27 @@ defmodule Pleroma.Web.AdminAPI.UserController do
       action: "approve"
     })
 
-    conn
-    |> put_view(AccountView)
-    |> render("index.json", %{users: updated_users})
+    render(conn, "index.json", users: updated_users)
   end
 
-  def list(conn, params) do
+  def index(conn, params) do
     {page, page_size} = page_params(params)
-    filters = maybe_parse_filters(params["filters"])
+    filters = maybe_parse_filters(params[:filters])
 
     search_params =
       %{
-        query: params["query"],
+        query: params[:query],
         page: page,
         page_size: page_size,
-        tags: params["tags"],
-        name: params["name"],
-        email: params["email"],
-        actor_types: params["actor_types"]
+        tags: params[:tags],
+        name: params[:name],
+        email: params[:email],
+        actor_types: params[:actor_types]
       }
       |> Map.merge(filters)
 
     with {:ok, users, count} <- Search.user(search_params) do
-      json(
-        conn,
-        AccountView.render("index.json",
-          users: users,
-          count: count,
-          page_size: page_size
-        )
-      )
+      render(conn, "index.json", users: users, count: count, page_size: page_size)
     end
   end
 
@@ -274,8 +276,8 @@ defmodule Pleroma.Web.AdminAPI.UserController do
 
   defp page_params(params) do
     {
-      fetch_integer_param(params, "page", 1),
-      fetch_integer_param(params, "page_size", @users_page_size)
+      fetch_integer_param(params, :page, 1),
+      fetch_integer_param(params, :page_size, @users_page_size)
     }
   end
 end
diff --git a/lib/pleroma/web/admin_api/views/account_view.ex b/lib/pleroma/web/admin_api/views/account_view.ex
index d7c63d385..e053a9b67 100644
--- a/lib/pleroma/web/admin_api/views/account_view.ex
+++ b/lib/pleroma/web/admin_api/views/account_view.ex
@@ -75,7 +75,7 @@ defmodule Pleroma.Web.AdminAPI.AccountView do
       "display_name" => display_name,
       "is_active" => user.is_active,
       "local" => user.local,
-      "roles" => User.roles(user),
+      "roles" => roles(user),
       "tags" => user.tags || [],
       "is_confirmed" => user.is_confirmed,
       "is_approved" => user.is_approved,
@@ -85,6 +85,10 @@ defmodule Pleroma.Web.AdminAPI.AccountView do
     }
   end
 
+  def render("created_many.json", %{users: users}) do
+    render_many(users, AccountView, "created.json", as: :user)
+  end
+
   def render("created.json", %{user: user}) do
     %{
       type: "success",
@@ -96,7 +100,11 @@ defmodule Pleroma.Web.AdminAPI.AccountView do
     }
   end
 
-  def render("create-error.json", %{changeset: %Ecto.Changeset{changes: changes, errors: errors}}) do
+  def render("create_errors.json", %{changesets: changesets}) do
+    render_many(changesets, AccountView, "create_error.json", as: :changeset)
+  end
+
+  def render("create_error.json", %{changeset: %Ecto.Changeset{changes: changes, errors: errors}}) do
     %{
       type: "error",
       code: 409,
@@ -140,4 +148,11 @@ defmodule Pleroma.Web.AdminAPI.AccountView do
 
   defp image_url(%{"url" => [%{"href" => href} | _]}), do: href
   defp image_url(_), do: nil
+
+  defp roles(%{is_moderator: is_moderator, is_admin: is_admin}) do
+    %{
+      admin: is_admin,
+      moderator: is_moderator
+    }
+  end
 end
diff --git a/lib/pleroma/web/admin_api/views/o_auth_app_view.ex b/lib/pleroma/web/admin_api/views/o_auth_app_view.ex
new file mode 100644
index 000000000..af046f343
--- /dev/null
+++ b/lib/pleroma/web/admin_api/views/o_auth_app_view.ex
@@ -0,0 +1,10 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.OAuthAppView do
+  use Pleroma.Web, :view
+  alias Pleroma.Web.MastodonAPI
+
+  def render(view, opts), do: MastodonAPI.AppView.render(view, opts)
+end
diff --git a/lib/pleroma/web/api_spec.ex b/lib/pleroma/web/api_spec.ex
index adc8762dc..528cd9cf4 100644
--- a/lib/pleroma/web/api_spec.ex
+++ b/lib/pleroma/web/api_spec.ex
@@ -92,9 +92,10 @@ defmodule Pleroma.Web.ApiSpec do
               "Invites",
               "MediaProxy cache",
               "OAuth application managment",
-              "Report managment",
               "Relays",
-              "Status administration"
+              "Report managment",
+              "Status administration",
+              "User administration"
             ]
           },
           %{"name" => "Applications", "tags" => ["Applications", "Push subscriptions"]},
diff --git a/lib/pleroma/web/api_spec/cast_and_validate.ex b/lib/pleroma/web/api_spec/cast_and_validate.ex
index a3da856ff..d23a7dcb6 100644
--- a/lib/pleroma/web/api_spec/cast_and_validate.ex
+++ b/lib/pleroma/web/api_spec/cast_and_validate.ex
@@ -15,6 +15,7 @@ defmodule Pleroma.Web.ApiSpec.CastAndValidate do
 
   @behaviour Plug
 
+  alias OpenApiSpex.Plug.PutApiSpec
   alias Plug.Conn
 
   @impl Plug
@@ -25,12 +26,10 @@ defmodule Pleroma.Web.ApiSpec.CastAndValidate do
   end
 
   @impl Plug
-  def call(%{private: %{open_api_spex: private_data}} = conn, %{
-        operation_id: operation_id,
-        render_error: render_error
-      }) do
-    spec = private_data.spec
-    operation = private_data.operation_lookup[operation_id]
+
+  def call(conn, %{operation_id: operation_id, render_error: render_error}) do
+    {spec, operation_lookup} = PutApiSpec.get_spec_and_operation_lookup(conn)
+    operation = operation_lookup[operation_id]
 
     content_type =
       case Conn.get_req_header(conn, "content-type") do
@@ -43,8 +42,7 @@ defmodule Pleroma.Web.ApiSpec.CastAndValidate do
           "application/json"
       end
 
-    private_data = Map.put(private_data, :operation_id, operation_id)
-    conn = Conn.put_private(conn, :open_api_spex, private_data)
+    conn = Conn.put_private(conn, :operation_id, operation_id)
 
     case cast_and_validate(spec, operation, conn, content_type, strict?()) do
       {:ok, conn} ->
@@ -64,25 +62,22 @@ defmodule Pleroma.Web.ApiSpec.CastAndValidate do
           private: %{
             phoenix_controller: controller,
             phoenix_action: action,
-            open_api_spex: private_data
+            open_api_spex: %{spec_module: spec_module}
           }
         } = conn,
         opts
       ) do
+    {spec, operation_lookup} = PutApiSpec.get_spec_and_operation_lookup(conn)
+
     operation =
-      case private_data.operation_lookup[{controller, action}] do
+      case operation_lookup[{controller, action}] do
         nil ->
           operation_id = controller.open_api_operation(action).operationId
-          operation = private_data.operation_lookup[operation_id]
+          operation = operation_lookup[operation_id]
 
-          operation_lookup =
-            private_data.operation_lookup
-            |> Map.put({controller, action}, operation)
+          operation_lookup = Map.put(operation_lookup, {controller, action}, operation)
 
-          OpenApiSpex.Plug.Cache.adapter().put(
-            private_data.spec_module,
-            {private_data.spec, operation_lookup}
-          )
+          OpenApiSpex.Plug.Cache.adapter().put(spec_module, {spec, operation_lookup})
 
           operation
 
diff --git a/lib/pleroma/web/api_spec/operations/admin/user_operation.ex b/lib/pleroma/web/api_spec/operations/admin/user_operation.ex
new file mode 100644
index 000000000..c9d0bfd7c
--- /dev/null
+++ b/lib/pleroma/web/api_spec/operations/admin/user_operation.ex
@@ -0,0 +1,389 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.Admin.UserOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Schemas.ActorType
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+
+  import Pleroma.Web.ApiSpec.Helpers
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def index_operation do
+    %Operation{
+      tags: ["User administration"],
+      summary: "List users",
+      operationId: "AdminAPI.UserController.index",
+      security: [%{"oAuth" => ["admin:read:accounts"]}],
+      parameters: [
+        Operation.parameter(:filters, :query, :string, "Comma separated list of filters"),
+        Operation.parameter(:query, :query, :string, "Search users query"),
+        Operation.parameter(:name, :query, :string, "Search by display name"),
+        Operation.parameter(:email, :query, :string, "Search by email"),
+        Operation.parameter(:page, :query, :integer, "Page Number"),
+        Operation.parameter(:page_size, :query, :integer, "Number of users to return per page"),
+        Operation.parameter(
+          :actor_types,
+          :query,
+          %Schema{type: :array, items: ActorType},
+          "Filter by actor type"
+        ),
+        Operation.parameter(
+          :tags,
+          :query,
+          %Schema{type: :array, items: %Schema{type: :string}},
+          "Filter by tags"
+        )
+        | admin_api_params()
+      ],
+      responses: %{
+        200 =>
+          Operation.response(
+            "Response",
+            "application/json",
+            %Schema{
+              type: :object,
+              properties: %{
+                users: %Schema{type: :array, items: user()},
+                count: %Schema{type: :integer},
+                page_size: %Schema{type: :integer}
+              }
+            }
+          ),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  def create_operation do
+    %Operation{
+      tags: ["User administration"],
+      summary: "Create a single or multiple users",
+      operationId: "AdminAPI.UserController.create",
+      security: [%{"oAuth" => ["admin:write:accounts"]}],
+      parameters: admin_api_params(),
+      requestBody:
+        request_body(
+          "Parameters",
+          %Schema{
+            description: "POST body for creating users",
+            type: :object,
+            properties: %{
+              users: %Schema{
+                type: :array,
+                items: %Schema{
+                  type: :object,
+                  properties: %{
+                    nickname: %Schema{type: :string},
+                    email: %Schema{type: :string},
+                    password: %Schema{type: :string}
+                  }
+                }
+              }
+            }
+          }
+        ),
+      responses: %{
+        200 =>
+          Operation.response("Response", "application/json", %Schema{
+            type: :array,
+            items: %Schema{
+              type: :object,
+              properties: %{
+                code: %Schema{type: :integer},
+                type: %Schema{type: :string},
+                data: %Schema{
+                  type: :object,
+                  properties: %{
+                    email: %Schema{type: :string, format: :email},
+                    nickname: %Schema{type: :string}
+                  }
+                }
+              }
+            }
+          }),
+        403 => Operation.response("Forbidden", "application/json", ApiError),
+        409 =>
+          Operation.response("Conflict", "application/json", %Schema{
+            type: :array,
+            items: %Schema{
+              type: :object,
+              properties: %{
+                code: %Schema{type: :integer},
+                error: %Schema{type: :string},
+                type: %Schema{type: :string},
+                data: %Schema{
+                  type: :object,
+                  properties: %{
+                    email: %Schema{type: :string, format: :email},
+                    nickname: %Schema{type: :string}
+                  }
+                }
+              }
+            }
+          })
+      }
+    }
+  end
+
+  def show_operation do
+    %Operation{
+      tags: ["User administration"],
+      summary: "Show user",
+      operationId: "AdminAPI.UserController.show",
+      security: [%{"oAuth" => ["admin:read:accounts"]}],
+      parameters: [
+        Operation.parameter(
+          :nickname,
+          :path,
+          :string,
+          "User nickname or ID"
+        )
+        | admin_api_params()
+      ],
+      responses: %{
+        200 => Operation.response("Response", "application/json", user()),
+        403 => Operation.response("Forbidden", "application/json", ApiError),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+
+  def follow_operation do
+    %Operation{
+      tags: ["User administration"],
+      summary: "Follow",
+      operationId: "AdminAPI.UserController.follow",
+      security: [%{"oAuth" => ["admin:write:follows"]}],
+      parameters: admin_api_params(),
+      requestBody:
+        request_body(
+          "Parameters",
+          %Schema{
+            type: :object,
+            properties: %{
+              follower: %Schema{type: :string, description: "Follower nickname"},
+              followed: %Schema{type: :string, description: "Followed nickname"}
+            }
+          }
+        ),
+      responses: %{
+        200 => Operation.response("Response", "application/json", %Schema{type: :string}),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  def unfollow_operation do
+    %Operation{
+      tags: ["User administration"],
+      summary: "Unfollow",
+      operationId: "AdminAPI.UserController.unfollow",
+      security: [%{"oAuth" => ["admin:write:follows"]}],
+      parameters: admin_api_params(),
+      requestBody:
+        request_body(
+          "Parameters",
+          %Schema{
+            type: :object,
+            properties: %{
+              follower: %Schema{type: :string, description: "Follower nickname"},
+              followed: %Schema{type: :string, description: "Followed nickname"}
+            }
+          }
+        ),
+      responses: %{
+        200 => Operation.response("Response", "application/json", %Schema{type: :string}),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  def approve_operation do
+    %Operation{
+      tags: ["User administration"],
+      summary: "Approve multiple users",
+      operationId: "AdminAPI.UserController.approve",
+      security: [%{"oAuth" => ["admin:write:accounts"]}],
+      parameters: admin_api_params(),
+      requestBody:
+        request_body(
+          "Parameters",
+          %Schema{
+            description: "POST body for deleting multiple users",
+            type: :object,
+            properties: %{
+              nicknames: %Schema{
+                type: :array,
+                items: %Schema{type: :string}
+              }
+            }
+          }
+        ),
+      responses: %{
+        200 =>
+          Operation.response("Response", "application/json", %Schema{
+            type: :object,
+            properties: %{user: %Schema{type: :array, items: user()}}
+          }),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  def toggle_activation_operation do
+    %Operation{
+      tags: ["User administration"],
+      summary: "Toggle user activation",
+      operationId: "AdminAPI.UserController.toggle_activation",
+      security: [%{"oAuth" => ["admin:write:accounts"]}],
+      parameters: [
+        Operation.parameter(:nickname, :path, :string, "User nickname")
+        | admin_api_params()
+      ],
+      responses: %{
+        200 => Operation.response("Response", "application/json", user()),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  def activate_operation do
+    %Operation{
+      tags: ["User administration"],
+      summary: "Activate multiple users",
+      operationId: "AdminAPI.UserController.activate",
+      security: [%{"oAuth" => ["admin:write:accounts"]}],
+      parameters: admin_api_params(),
+      requestBody:
+        request_body(
+          "Parameters",
+          %Schema{
+            description: "POST body for deleting multiple users",
+            type: :object,
+            properties: %{
+              nicknames: %Schema{
+                type: :array,
+                items: %Schema{type: :string}
+              }
+            }
+          }
+        ),
+      responses: %{
+        200 =>
+          Operation.response("Response", "application/json", %Schema{
+            type: :object,
+            properties: %{user: %Schema{type: :array, items: user()}}
+          }),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  def deactivate_operation do
+    %Operation{
+      tags: ["User administration"],
+      summary: "Deactivates multiple users",
+      operationId: "AdminAPI.UserController.deactivate",
+      security: [%{"oAuth" => ["admin:write:accounts"]}],
+      parameters: admin_api_params(),
+      requestBody:
+        request_body(
+          "Parameters",
+          %Schema{
+            description: "POST body for deleting multiple users",
+            type: :object,
+            properties: %{
+              nicknames: %Schema{
+                type: :array,
+                items: %Schema{type: :string}
+              }
+            }
+          }
+        ),
+      responses: %{
+        200 =>
+          Operation.response("Response", "application/json", %Schema{
+            type: :object,
+            properties: %{user: %Schema{type: :array, items: user()}}
+          }),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  def delete_operation do
+    %Operation{
+      tags: ["User administration"],
+      summary: "Removes a single or multiple users",
+      operationId: "AdminAPI.UserController.delete",
+      security: [%{"oAuth" => ["admin:write:accounts"]}],
+      parameters: [
+        Operation.parameter(
+          :nickname,
+          :query,
+          :string,
+          "User nickname"
+        )
+        | admin_api_params()
+      ],
+      requestBody:
+        request_body(
+          "Parameters",
+          %Schema{
+            description: "POST body for deleting multiple users",
+            type: :object,
+            properties: %{
+              nicknames: %Schema{
+                type: :array,
+                items: %Schema{type: :string}
+              }
+            }
+          }
+        ),
+      responses: %{
+        200 =>
+          Operation.response("Response", "application/json", %Schema{
+            description: "Array of nicknames",
+            type: :array,
+            items: %Schema{type: :string}
+          }),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  defp user do
+    %Schema{
+      type: :object,
+      properties: %{
+        id: %Schema{type: :string},
+        email: %Schema{type: :string, format: :email},
+        avatar: %Schema{type: :string, format: :uri},
+        nickname: %Schema{type: :string},
+        display_name: %Schema{type: :string},
+        is_active: %Schema{type: :boolean},
+        local: %Schema{type: :boolean},
+        roles: %Schema{
+          type: :object,
+          properties: %{
+            admin: %Schema{type: :boolean},
+            moderator: %Schema{type: :boolean}
+          }
+        },
+        tags: %Schema{type: :array, items: %Schema{type: :string}},
+        is_confirmed: %Schema{type: :boolean},
+        is_approved: %Schema{type: :boolean},
+        url: %Schema{type: :string, format: :uri},
+        registration_reason: %Schema{type: :string, nullable: true},
+        actor_type: %Schema{type: :string}
+      }
+    }
+  end
+end
diff --git a/lib/pleroma/web/api_spec/operations/media_operation.ex b/lib/pleroma/web/api_spec/operations/media_operation.ex
index 85aa14869..1e245b291 100644
--- a/lib/pleroma/web/api_spec/operations/media_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/media_operation.ex
@@ -105,6 +105,7 @@ defmodule Pleroma.Web.ApiSpec.MediaOperation do
       responses: %{
         200 => Operation.response("Media", "application/json", Attachment),
         401 => Operation.response("Media", "application/json", ApiError),
+        403 => Operation.response("Media", "application/json", ApiError),
         422 => Operation.response("Media", "application/json", ApiError)
       }
     }
diff --git a/lib/pleroma/web/api_spec/operations/status_operation.ex b/lib/pleroma/web/api_spec/operations/status_operation.ex
index 40edc747d..802fbef3e 100644
--- a/lib/pleroma/web/api_spec/operations/status_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/status_operation.ex
@@ -59,7 +59,7 @@ defmodule Pleroma.Web.ApiSpec.StatusOperation do
           Operation.response(
             "Status. When `scheduled_at` is present, ScheduledStatus is returned instead",
             "application/json",
-            %Schema{oneOf: [Status, ScheduledStatus]}
+            %Schema{anyOf: [Status, ScheduledStatus]}
           ),
         422 => Operation.response("Bad Request / MRF Rejection", "application/json", ApiError)
       }
@@ -182,7 +182,34 @@ defmodule Pleroma.Web.ApiSpec.StatusOperation do
       parameters: [id_param()],
       responses: %{
         200 => status_response(),
-        400 => Operation.response("Error", "application/json", ApiError)
+        400 =>
+          Operation.response("Bad Request", "application/json", %Schema{
+            allOf: [ApiError],
+            title: "Unprocessable Entity",
+            example: %{
+              "error" => "You have already pinned the maximum number of statuses"
+            }
+          }),
+        404 =>
+          Operation.response("Not found", "application/json", %Schema{
+            allOf: [ApiError],
+            title: "Unprocessable Entity",
+            example: %{
+              "error" => "Record not found"
+            }
+          }),
+        422 =>
+          Operation.response(
+            "Unprocessable Entity",
+            "application/json",
+            %Schema{
+              allOf: [ApiError],
+              title: "Unprocessable Entity",
+              example: %{
+                "error" => "Someone else's status cannot be pinned"
+              }
+            }
+          )
       }
     }
   end
@@ -197,7 +224,22 @@ defmodule Pleroma.Web.ApiSpec.StatusOperation do
       parameters: [id_param()],
       responses: %{
         200 => status_response(),
-        400 => Operation.response("Error", "application/json", ApiError)
+        400 =>
+          Operation.response("Bad Request", "application/json", %Schema{
+            allOf: [ApiError],
+            title: "Unprocessable Entity",
+            example: %{
+              "error" => "You have already pinned the maximum number of statuses"
+            }
+          }),
+        404 =>
+          Operation.response("Not found", "application/json", %Schema{
+            allOf: [ApiError],
+            title: "Unprocessable Entity",
+            example: %{
+              "error" => "Record not found"
+            }
+          })
       }
     }
   end
diff --git a/lib/pleroma/web/api_spec/operations/timeline_operation.ex b/lib/pleroma/web/api_spec/operations/timeline_operation.ex
index cae18c758..24d792916 100644
--- a/lib/pleroma/web/api_spec/operations/timeline_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/timeline_operation.ex
@@ -115,7 +115,8 @@ defmodule Pleroma.Web.ApiSpec.TimelineOperation do
       ],
       operationId: "TimelineController.hashtag",
       responses: %{
-        200 => Operation.response("Array of Status", "application/json", array_of_statuses())
+        200 => Operation.response("Array of Status", "application/json", array_of_statuses()),
+        401 => Operation.response("Error", "application/json", ApiError)
       }
     }
   end
diff --git a/lib/pleroma/web/api_spec/operations/twitter_util_operation.ex b/lib/pleroma/web/api_spec/operations/twitter_util_operation.ex
new file mode 100644
index 000000000..0cafbc719
--- /dev/null
+++ b/lib/pleroma/web/api_spec/operations/twitter_util_operation.ex
@@ -0,0 +1,219 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.TwitterUtilOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+  alias Pleroma.Web.ApiSpec.Schemas.BooleanLike
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def emoji_operation do
+    %Operation{
+      tags: ["Emojis"],
+      summary: "List all custom emojis",
+      operationId: "UtilController.emoji",
+      parameters: [],
+      responses: %{
+        200 =>
+          Operation.response("List", "application/json", %Schema{
+            type: :object,
+            additionalProperties: %Schema{
+              type: :object,
+              properties: %{
+                image_url: %Schema{type: :string},
+                tags: %Schema{type: :array, items: %Schema{type: :string}}
+              }
+            },
+            example: %{
+              "firefox" => %{
+                "image_url" => "/emoji/firefox.png",
+                "tag" => ["Fun"]
+              }
+            }
+          })
+      }
+    }
+  end
+
+  def frontend_configurations_operation do
+    %Operation{
+      tags: ["Configuration"],
+      summary: "Dump frontend configurations",
+      operationId: "UtilController.frontend_configurations",
+      parameters: [],
+      responses: %{
+        200 =>
+          Operation.response("List", "application/json", %Schema{
+            type: :object,
+            additionalProperties: %Schema{type: :object}
+          })
+      }
+    }
+  end
+
+  def change_password_operation do
+    %Operation{
+      tags: ["Account credentials"],
+      summary: "Change account password",
+      security: [%{"oAuth" => ["write:accounts"]}],
+      operationId: "UtilController.change_password",
+      parameters: [
+        Operation.parameter(:password, :query, :string, "Current password", required: true),
+        Operation.parameter(:new_password, :query, :string, "New password", required: true),
+        Operation.parameter(
+          :new_password_confirmation,
+          :query,
+          :string,
+          "New password, confirmation",
+          required: true
+        )
+      ],
+      responses: %{
+        200 =>
+          Operation.response("Success", "application/json", %Schema{
+            type: :object,
+            properties: %{status: %Schema{type: :string, example: "success"}}
+          }),
+        400 => Operation.response("Error", "application/json", ApiError),
+        403 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  def change_email_operation do
+    %Operation{
+      tags: ["Account credentials"],
+      summary: "Change account email",
+      security: [%{"oAuth" => ["write:accounts"]}],
+      operationId: "UtilController.change_email",
+      parameters: [
+        Operation.parameter(:password, :query, :string, "Current password", required: true),
+        Operation.parameter(:email, :query, :string, "New email", required: true)
+      ],
+      requestBody: nil,
+      responses: %{
+        200 =>
+          Operation.response("Success", "application/json", %Schema{
+            type: :object,
+            properties: %{status: %Schema{type: :string, example: "success"}}
+          }),
+        400 => Operation.response("Error", "application/json", ApiError),
+        403 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  def update_notificaton_settings_operation do
+    %Operation{
+      tags: ["Accounts"],
+      summary: "Update Notification Settings",
+      security: [%{"oAuth" => ["write:accounts"]}],
+      operationId: "UtilController.update_notificaton_settings",
+      parameters: [
+        Operation.parameter(
+          :block_from_strangers,
+          :query,
+          BooleanLike,
+          "blocks notifications from accounts you do not follow"
+        ),
+        Operation.parameter(
+          :hide_notification_contents,
+          :query,
+          BooleanLike,
+          "removes the contents of a message from the push notification"
+        )
+      ],
+      requestBody: nil,
+      responses: %{
+        200 =>
+          Operation.response("Success", "application/json", %Schema{
+            type: :object,
+            properties: %{status: %Schema{type: :string, example: "success"}}
+          }),
+        400 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  def disable_account_operation do
+    %Operation{
+      tags: ["Account credentials"],
+      summary: "Disable Account",
+      security: [%{"oAuth" => ["write:accounts"]}],
+      operationId: "UtilController.disable_account",
+      parameters: [
+        Operation.parameter(:password, :query, :string, "Password")
+      ],
+      responses: %{
+        200 =>
+          Operation.response("Success", "application/json", %Schema{
+            type: :object,
+            properties: %{status: %Schema{type: :string, example: "success"}}
+          }),
+        403 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  def delete_account_operation do
+    %Operation{
+      tags: ["Account credentials"],
+      summary: "Delete Account",
+      security: [%{"oAuth" => ["write:accounts"]}],
+      operationId: "UtilController.delete_account",
+      parameters: [
+        Operation.parameter(:password, :query, :string, "Password")
+      ],
+      responses: %{
+        200 =>
+          Operation.response("Success", "application/json", %Schema{
+            type: :object,
+            properties: %{status: %Schema{type: :string, example: "success"}}
+          }),
+        403 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  def captcha_operation do
+    %Operation{
+      summary: "Get a captcha",
+      operationId: "UtilController.captcha",
+      parameters: [],
+      responses: %{
+        200 => Operation.response("Success", "application/json", %Schema{type: :object})
+      }
+    }
+  end
+
+  def healthcheck_operation do
+    %Operation{
+      tags: ["Accounts"],
+      summary: "Quick status check on the instance",
+      security: [%{"oAuth" => ["write:accounts"]}],
+      operationId: "UtilController.healthcheck",
+      parameters: [],
+      responses: %{
+        200 => Operation.response("Healthy", "application/json", %Schema{type: :object}),
+        503 =>
+          Operation.response("Disabled or Unhealthy", "application/json", %Schema{type: :object})
+      }
+    }
+  end
+
+  def remote_subscribe_operation do
+    %Operation{
+      tags: ["Accounts"],
+      summary: "Remote Subscribe",
+      operationId: "UtilController.remote_subscribe",
+      parameters: [],
+      responses: %{200 => Operation.response("Web Page", "test/html", %Schema{type: :string})}
+    }
+  end
+end
diff --git a/lib/pleroma/web/api_spec/operations/user_import_operation.ex b/lib/pleroma/web/api_spec/operations/user_import_operation.ex
index 6292e2004..8df19f1fc 100644
--- a/lib/pleroma/web/api_spec/operations/user_import_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/user_import_operation.ex
@@ -23,6 +23,7 @@ defmodule Pleroma.Web.ApiSpec.UserImportOperation do
       requestBody: request_body("Parameters", import_request(), required: true),
       responses: %{
         200 => ok_response(),
+        403 => Operation.response("Error", "application/json", ApiError),
         500 => Operation.response("Error", "application/json", ApiError)
       },
       security: [%{"oAuth" => ["write:follow"]}]
diff --git a/lib/pleroma/web/api_spec/schemas/boolean_like.ex b/lib/pleroma/web/api_spec/schemas/boolean_like.ex
index eb001c5bb..778158f66 100644
--- a/lib/pleroma/web/api_spec/schemas/boolean_like.ex
+++ b/lib/pleroma/web/api_spec/schemas/boolean_like.ex
@@ -3,6 +3,7 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ApiSpec.Schemas.BooleanLike do
+  alias OpenApiSpex.Cast
   alias OpenApiSpex.Schema
 
   require OpenApiSpex
@@ -27,10 +28,13 @@ defmodule Pleroma.Web.ApiSpec.Schemas.BooleanLike do
       %Schema{type: :boolean},
       %Schema{type: :string},
       %Schema{type: :integer}
-    ]
+    ],
+    "x-validate": __MODULE__
   })
 
-  def after_cast(value, _schmea) do
-    {:ok, Pleroma.Web.ControllerHelper.truthy_param?(value)}
+  def cast(%Cast{value: value} = context) do
+    context
+    |> Map.put(:value, Pleroma.Web.ControllerHelper.truthy_param?(value))
+    |> Cast.ok()
   end
 end
diff --git a/lib/pleroma/web/api_spec/schemas/status.ex b/lib/pleroma/web/api_spec/schemas/status.ex
index 42fa98718..3d042dc19 100644
--- a/lib/pleroma/web/api_spec/schemas/status.ex
+++ b/lib/pleroma/web/api_spec/schemas/status.ex
@@ -194,6 +194,13 @@ defmodule Pleroma.Web.ApiSpec.Schemas.Status do
           parent_visible: %Schema{
             type: :boolean,
             description: "`true` if the parent post is visible to the user"
+          },
+          pinned_at: %Schema{
+            type: :string,
+            format: "date-time",
+            nullable: true,
+            description:
+              "A datetime (ISO 8601) that states when the post was pinned or `null` if the post is not pinned"
           }
         }
       },
diff --git a/lib/pleroma/web/channels/user_socket.ex b/lib/pleroma/web/channels/user_socket.ex
index 1c09b6768..043206835 100644
--- a/lib/pleroma/web/channels/user_socket.ex
+++ b/lib/pleroma/web/channels/user_socket.ex
@@ -8,7 +8,7 @@ defmodule Pleroma.Web.UserSocket do
 
   ## Channels
   # channel "room:*", Pleroma.Web.RoomChannel
-  channel("chat:*", Pleroma.Web.ChatChannel)
+  channel("chat:*", Pleroma.Web.ShoutChannel)
 
   # Socket params are passed from the client and can
   # be used to verify and authenticate a user. After
@@ -22,7 +22,7 @@ defmodule Pleroma.Web.UserSocket do
   # See `Phoenix.Token` documentation for examples in
   # performing token verification on connect.
   def connect(%{"token" => token}, socket) do
-    with true <- Pleroma.Config.get([:chat, :enabled]),
+    with true <- Pleroma.Config.get([:shout, :enabled]),
          {:ok, user_id} <- Phoenix.Token.verify(socket, "user socket", token, max_age: 84_600),
          %User{} = user <- Pleroma.User.get_cached_by_id(user_id) do
       {:ok, assign(socket, :user_name, user.nickname)}
diff --git a/lib/pleroma/web/common_api.ex b/lib/pleroma/web/common_api.ex
index b003e30c7..1b5f8491e 100644
--- a/lib/pleroma/web/common_api.ex
+++ b/lib/pleroma/web/common_api.ex
@@ -228,17 +228,7 @@ defmodule Pleroma.Web.CommonAPI do
       {:find_object, _} ->
         {:error, :not_found}
 
-      {:common_pipeline,
-       {
-         :error,
-         {
-           :validate_object,
-           {
-             :error,
-             changeset
-           }
-         }
-       }} = e ->
+      {:common_pipeline, {:error, {:validate, {:error, changeset}}}} = e ->
         if {:object, {"already liked by this actor", []}} in changeset.errors do
           {:ok, :already_liked}
         else
@@ -411,29 +401,58 @@ defmodule Pleroma.Web.CommonAPI do
     end
   end
 
-  def pin(id, %{ap_id: user_ap_id} = user) do
-    with %Activity{
-           actor: ^user_ap_id,
-           data: %{"type" => "Create"},
-           object: %Object{data: %{"type" => object_type}}
-         } = activity <- Activity.get_by_id_with_object(id),
-         true <- object_type in ["Note", "Article", "Question"],
-         true <- Visibility.is_public?(activity),
-         {:ok, _user} <- User.add_pinnned_activity(user, activity) do
+  @spec pin(String.t(), User.t()) :: {:ok, Activity.t()} | {:error, term()}
+  def pin(id, %User{} = user) do
+    with %Activity{} = activity <- create_activity_by_id(id),
+         true <- activity_belongs_to_actor(activity, user.ap_id),
+         true <- object_type_is_allowed_for_pin(activity.object),
+         true <- activity_is_public(activity),
+         {:ok, pin_data, _} <- Builder.pin(user, activity.object),
+         {:ok, _pin, _} <-
+           Pipeline.common_pipeline(pin_data,
+             local: true,
+             activity_id: id
+           ) do
       {:ok, activity}
     else
-      {:error, %{errors: [pinned_activities: {err, _}]}} -> {:error, err}
-      _ -> {:error, dgettext("errors", "Could not pin")}
+      {:error, {:side_effects, error}} -> error
+      error -> error
     end
   end
 
+  defp create_activity_by_id(id) do
+    with nil <- Activity.create_by_id_with_object(id) do
+      {:error, :not_found}
+    end
+  end
+
+  defp activity_belongs_to_actor(%{actor: actor}, actor), do: true
+  defp activity_belongs_to_actor(_, _), do: {:error, :ownership_error}
+
+  defp object_type_is_allowed_for_pin(%{data: %{"type" => type}}) do
+    with false <- type in ["Note", "Article", "Question"] do
+      {:error, :not_allowed}
+    end
+  end
+
+  defp activity_is_public(activity) do
+    with false <- Visibility.is_public?(activity) do
+      {:error, :visibility_error}
+    end
+  end
+
+  @spec unpin(String.t(), User.t()) :: {:ok, User.t()} | {:error, term()}
   def unpin(id, user) do
-    with %Activity{data: %{"type" => "Create"}} = activity <- Activity.get_by_id(id),
-         {:ok, _user} <- User.remove_pinnned_activity(user, activity) do
+    with %Activity{} = activity <- create_activity_by_id(id),
+         {:ok, unpin_data, _} <- Builder.unpin(user, activity.object),
+         {:ok, _unpin, _} <-
+           Pipeline.common_pipeline(unpin_data,
+             local: true,
+             activity_id: activity.id,
+             expires_at: activity.data["expires_at"],
+             featured_address: user.featured_address
+           ) do
       {:ok, activity}
-    else
-      {:error, %{errors: [pinned_activities: {err, _}]}} -> {:error, err}
-      _ -> {:error, dgettext("errors", "Could not unpin")}
     end
   end
 
diff --git a/lib/pleroma/web/common_api/activity_draft.ex b/lib/pleroma/web/common_api/activity_draft.ex
index 73f1b0931..80a9fa7bb 100644
--- a/lib/pleroma/web/common_api/activity_draft.ex
+++ b/lib/pleroma/web/common_api/activity_draft.ex
@@ -5,6 +5,7 @@
 defmodule Pleroma.Web.CommonAPI.ActivityDraft do
   alias Pleroma.Activity
   alias Pleroma.Conversation.Participation
+  alias Pleroma.Object
   alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.CommonAPI.Utils
 
@@ -179,13 +180,39 @@ defmodule Pleroma.Web.CommonAPI.ActivityDraft do
   end
 
   defp sensitive(draft) do
-    sensitive = draft.params[:sensitive] || Enum.member?(draft.tags, {"#nsfw", "nsfw"})
+    sensitive = draft.params[:sensitive]
     %__MODULE__{draft | sensitive: sensitive}
   end
 
   defp object(draft) do
     emoji = Map.merge(Pleroma.Emoji.Formatter.get_emoji_map(draft.full_payload), draft.emoji)
 
+    # Sometimes people create posts with subject containing emoji,
+    # since subjects are usually copied this will result in a broken
+    # subject when someone replies from an instance that does not have
+    # the emoji or has it under different shortcode. This is an attempt
+    # to mitigate this by copying emoji from inReplyTo if they are present
+    # in the subject.
+    summary_emoji =
+      with %Activity{} <- draft.in_reply_to,
+           %Object{data: %{"tag" => [_ | _] = tag}} <- Object.normalize(draft.in_reply_to) do
+        Enum.reduce(tag, %{}, fn
+          %{"type" => "Emoji", "name" => name, "icon" => %{"url" => url}}, acc ->
+            if String.contains?(draft.summary, name) do
+              Map.put(acc, name, url)
+            else
+              acc
+            end
+
+          _, acc ->
+            acc
+        end)
+      else
+        _ -> %{}
+      end
+
+    emoji = Map.merge(emoji, summary_emoji)
+
     object =
       Utils.make_note_data(draft)
       |> Map.put("emoji", emoji)
diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index 9587dfa25..4cc34002d 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -69,7 +69,7 @@ defmodule Pleroma.Web.CommonAPI.Utils do
     to =
       case visibility do
         "public" -> [Pleroma.Constants.as_public() | draft.mentions]
-        "local" -> [Pleroma.Constants.as_local_public() | draft.mentions]
+        "local" -> [Utils.as_local_public() | draft.mentions]
       end
 
     cc = [draft.user.follower_address]
@@ -217,7 +217,6 @@ defmodule Pleroma.Web.CommonAPI.Utils do
     draft.status
     |> format_input(content_type, options)
     |> maybe_add_attachments(draft.attachments, attachment_links)
-    |> maybe_add_nsfw_tag(draft.params)
   end
 
   defp get_content_type(content_type) do
@@ -228,13 +227,6 @@ defmodule Pleroma.Web.CommonAPI.Utils do
     end
   end
 
-  defp maybe_add_nsfw_tag({text, mentions, tags}, %{"sensitive" => sensitive})
-       when sensitive in [true, "True", "true", "1"] do
-    {text, mentions, [{"#nsfw", "nsfw"} | tags]}
-  end
-
-  defp maybe_add_nsfw_tag(data, _), do: data
-
   def make_context(_, %Participation{} = participation) do
     Repo.preload(participation, :conversation).conversation.ap_id
   end
@@ -294,7 +286,7 @@ defmodule Pleroma.Web.CommonAPI.Utils do
   def format_input(text, "text/markdown", options) do
     text
     |> Formatter.mentions_escape(options)
-    |> Earmark.as_html!(%Earmark.Options{renderer: Pleroma.EarmarkRenderer})
+    |> Formatter.markdown_to_html()
     |> Formatter.linkify(options)
     |> Formatter.html_escape("text/html")
   end
diff --git a/lib/pleroma/web/federator.ex b/lib/pleroma/web/federator.ex
index f5ef76d32..69cfc2d52 100644
--- a/lib/pleroma/web/federator.ex
+++ b/lib/pleroma/web/federator.ex
@@ -96,6 +96,11 @@ defmodule Pleroma.Web.Federator do
         Logger.debug("Unhandled actor #{actor}, #{inspect(e)}")
         {:error, e}
 
+      {:error, {:validate_object, _}} = e ->
+        Logger.error("Incoming AP doc validation error: #{inspect(e)}")
+        Logger.debug(Jason.encode!(params, pretty: true))
+        e
+
       e ->
         # Just drop those for now
         Logger.debug(fn -> "Unhandled activity\n" <> Jason.encode!(params, pretty: true) end)
diff --git a/lib/pleroma/web/feed/feed_view.ex b/lib/pleroma/web/feed/feed_view.ex
index df97d2f46..c0fb35e01 100644
--- a/lib/pleroma/web/feed/feed_view.ex
+++ b/lib/pleroma/web/feed/feed_view.ex
@@ -32,6 +32,7 @@ defmodule Pleroma.Web.Feed.FeedView do
 
     %{
       activity: activity,
+      object: object,
       data: Map.get(object, :data),
       actor: actor
     }
@@ -51,10 +52,10 @@ defmodule Pleroma.Web.Feed.FeedView do
   def feed_logo do
     case Pleroma.Config.get([:feed, :logo]) do
       nil ->
-        "#{Pleroma.Web.base_url()}/static/logo.svg"
+        "#{Pleroma.Web.Endpoint.url()}/static/logo.svg"
 
       logo ->
-        "#{Pleroma.Web.base_url()}#{logo}"
+        "#{Pleroma.Web.Endpoint.url()}#{logo}"
     end
     |> MediaProxy.url()
   end
diff --git a/lib/pleroma/web/feed/user_controller.ex b/lib/pleroma/web/feed/user_controller.ex
index 58d35da1e..fa7879caf 100644
--- a/lib/pleroma/web/feed/user_controller.ex
+++ b/lib/pleroma/web/feed/user_controller.ex
@@ -28,7 +28,7 @@ defmodule Pleroma.Web.Feed.UserController do
 
   def feed_redirect(conn, %{"nickname" => nickname}) do
     with {_, %User{} = user} <- {:fetch_user, User.get_cached_by_nickname(nickname)} do
-      redirect(conn, external: "#{user_feed_url(conn, :feed, user.nickname)}.atom")
+      redirect(conn, external: "#{Routes.user_feed_url(conn, :feed, user.nickname)}.atom")
     end
   end
 
diff --git a/lib/pleroma/web/mastodon_api/controllers/auth_controller.ex b/lib/pleroma/web/mastodon_api/controllers/auth_controller.ex
index eb6639fc5..4920d65da 100644
--- a/lib/pleroma/web/mastodon_api/controllers/auth_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/auth_controller.ex
@@ -53,7 +53,7 @@ defmodule Pleroma.Web.MastodonAPI.AuthController do
   defp redirect_to_oauth_form(conn, _params) do
     with {:ok, app} <- local_mastofe_app() do
       path =
-        o_auth_path(conn, :authorize,
+        Routes.o_auth_path(conn, :authorize,
           response_type: "code",
           client_id: app.client_id,
           redirect_uri: ".",
@@ -90,7 +90,7 @@ defmodule Pleroma.Web.MastodonAPI.AuthController do
   defp local_mastodon_post_login_path(conn) do
     case get_session(conn, :return_to) do
       nil ->
-        masto_fe_path(conn, :index, ["getting-started"])
+        Routes.masto_fe_path(conn, :index, ["getting-started"])
 
       return_to ->
         delete_session(conn, :return_to)
diff --git a/lib/pleroma/web/mastodon_api/controllers/fallback_controller.ex b/lib/pleroma/web/mastodon_api/controllers/fallback_controller.ex
index d25f84837..84621500e 100644
--- a/lib/pleroma/web/mastodon_api/controllers/fallback_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/fallback_controller.ex
@@ -30,6 +30,12 @@ defmodule Pleroma.Web.MastodonAPI.FallbackController do
     |> json(%{error: error_message})
   end
 
+  def call(conn, {:error, status, message}) do
+    conn
+    |> put_status(status)
+    |> json(%{error: message})
+  end
+
   def call(conn, _) do
     conn
     |> put_status(:internal_server_error)
diff --git a/lib/pleroma/web/mastodon_api/controllers/follow_request_controller.ex b/lib/pleroma/web/mastodon_api/controllers/follow_request_controller.ex
index 63d0e2c35..d915298f1 100644
--- a/lib/pleroma/web/mastodon_api/controllers/follow_request_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/follow_request_controller.ex
@@ -9,7 +9,6 @@ defmodule Pleroma.Web.MastodonAPI.FollowRequestController do
   alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.Plugs.OAuthScopesPlug
 
-  plug(:put_view, Pleroma.Web.MastodonAPI.AccountView)
   plug(Pleroma.Web.ApiSpec.CastAndValidate)
   plug(:assign_follower when action != :index)
 
diff --git a/lib/pleroma/web/mastodon_api/controllers/instance_controller.ex b/lib/pleroma/web/mastodon_api/controllers/instance_controller.ex
index 267d0f03b..c7a5267d4 100644
--- a/lib/pleroma/web/mastodon_api/controllers/instance_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/instance_controller.ex
@@ -5,7 +5,7 @@
 defmodule Pleroma.Web.MastodonAPI.InstanceController do
   use Pleroma.Web, :controller
 
-  plug(OpenApiSpex.Plug.CastAndValidate)
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
 
   plug(
     :skip_plug,
diff --git a/lib/pleroma/web/mastodon_api/controllers/media_controller.ex b/lib/pleroma/web/mastodon_api/controllers/media_controller.ex
index d6949ed80..5918b288d 100644
--- a/lib/pleroma/web/mastodon_api/controllers/media_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/media_controller.ex
@@ -13,7 +13,6 @@ defmodule Pleroma.Web.MastodonAPI.MediaController do
   action_fallback(Pleroma.Web.MastodonAPI.FallbackController)
   plug(Majic.Plug, [pool: Pleroma.MajicPool] when action in [:create, :create2])
   plug(Pleroma.Web.ApiSpec.CastAndValidate)
-  plug(:put_view, Pleroma.Web.MastodonAPI.StatusView)
 
   plug(OAuthScopesPlug, %{scopes: ["read:media"]} when action == :show)
   plug(OAuthScopesPlug, %{scopes: ["write:media"]} when action != :show)
diff --git a/lib/pleroma/web/mastodon_api/controllers/search_controller.ex b/lib/pleroma/web/mastodon_api/controllers/search_controller.ex
index af93e453d..64b177eb3 100644
--- a/lib/pleroma/web/mastodon_api/controllers/search_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/search_controller.ex
@@ -8,8 +8,8 @@ defmodule Pleroma.Web.MastodonAPI.SearchController do
   alias Pleroma.Activity
   alias Pleroma.Repo
   alias Pleroma.User
-  alias Pleroma.Web
   alias Pleroma.Web.ControllerHelper
+  alias Pleroma.Web.Endpoint
   alias Pleroma.Web.MastodonAPI.AccountView
   alias Pleroma.Web.MastodonAPI.StatusView
   alias Pleroma.Web.Plugs.OAuthScopesPlug
@@ -108,7 +108,7 @@ defmodule Pleroma.Web.MastodonAPI.SearchController do
   end
 
   defp resource_search(:v2, "hashtags", query, options) do
-    tags_path = Web.base_url() <> "/tag/"
+    tags_path = Endpoint.url() <> "/tag/"
 
     query
     |> prepare_tags(options)
diff --git a/lib/pleroma/web/mastodon_api/controllers/status_controller.ex b/lib/pleroma/web/mastodon_api/controllers/status_controller.ex
index d1a58d5e1..724dc5c5d 100644
--- a/lib/pleroma/web/mastodon_api/controllers/status_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/status_controller.ex
@@ -21,7 +21,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusController do
   alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.MastodonAPI.AccountView
   alias Pleroma.Web.MastodonAPI.ScheduledActivityView
-  # alias Pleroma.Web.OAuth.Token
+  alias Pleroma.Web.OAuth.Token
   alias Pleroma.Web.Plugs.OAuthScopesPlug
   alias Pleroma.Web.Plugs.RateLimiter
 
@@ -260,6 +260,18 @@ defmodule Pleroma.Web.MastodonAPI.StatusController do
   def pin(%{assigns: %{user: user}} = conn, %{id: ap_id_or_id}) do
     with {:ok, activity} <- CommonAPI.pin(ap_id_or_id, user) do
       try_render(conn, "show.json", activity: activity, for: user, as: :activity)
+    else
+      {:error, :pinned_statuses_limit_reached} ->
+        {:error, "You have already pinned the maximum number of statuses"}
+
+      {:error, :ownership_error} ->
+        {:error, :unprocessable_entity, "Someone else's status cannot be pinned"}
+
+      {:error, :visibility_error} ->
+        {:error, :unprocessable_entity, "Non-public status cannot be pinned"}
+
+      error ->
+        error
     end
   end
 
@@ -420,16 +432,14 @@ defmodule Pleroma.Web.MastodonAPI.StatusController do
     )
   end
 
-  # Deactivated for 2.3.0
-  # defp put_application(params,
-  #   %{assigns: %{token: %Token{user: %User{} = user} = token}} = _conn) do
-  #   if user.disclose_client do
-  #     %{client_name: client_name, website: website} = Repo.preload(token, :app).app
-  #     Map.put(params, :generator, %{type: "Application", name: client_name, url: website})
-  #   else
-  #     Map.put(params, :generator, nil)
-  #   end
-  # end
+  defp put_application(params, %{assigns: %{token: %Token{user: %User{} = user} = token}} = _conn) do
+    if user.disclose_client do
+      %{client_name: client_name, website: website} = Repo.preload(token, :app).app
+      Map.put(params, :generator, %{type: "Application", name: client_name, url: website})
+    else
+      Map.put(params, :generator, nil)
+    end
+  end
 
   defp put_application(params, _), do: Map.put(params, :generator, nil)
 end
diff --git a/lib/pleroma/web/mastodon_api/controllers/timeline_controller.ex b/lib/pleroma/web/mastodon_api/controllers/timeline_controller.ex
index cef299aa4..845f546d4 100644
--- a/lib/pleroma/web/mastodon_api/controllers/timeline_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/timeline_controller.ex
@@ -37,8 +37,6 @@ defmodule Pleroma.Web.MastodonAPI.TimelineController do
     when action in [:public, :hashtag]
   )
 
-  plug(:put_view, Pleroma.Web.MastodonAPI.StatusView)
-
   defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.TimelineOperation
 
   # GET /api/v1/timelines/home
@@ -133,34 +131,25 @@ defmodule Pleroma.Web.MastodonAPI.TimelineController do
   end
 
   defp hashtag_fetching(params, user, local_only) do
-    tags =
+    # Note: not sanitizing tag options at this stage (may be mix-cased, have duplicates etc.)
+    tags_any =
       [params[:tag], params[:any]]
       |> List.flatten()
-      |> Enum.uniq()
-      |> Enum.reject(&is_nil/1)
-      |> Enum.map(&String.downcase/1)
-
-    tag_all =
-      params
-      |> Map.get(:all, [])
-      |> Enum.map(&String.downcase/1)
-
-    tag_reject =
-      params
-      |> Map.get(:none, [])
-      |> Enum.map(&String.downcase/1)
-
-    _activities =
-      params
-      |> Map.put(:type, "Create")
-      |> Map.put(:local_only, local_only)
-      |> Map.put(:blocking_user, user)
-      |> Map.put(:muting_user, user)
-      |> Map.put(:user, user)
-      |> Map.put(:tag, tags)
-      |> Map.put(:tag_all, tag_all)
-      |> Map.put(:tag_reject, tag_reject)
-      |> ActivityPub.fetch_public_activities()
+      |> Enum.filter(& &1)
+
+    tag_all = Map.get(params, :all, [])
+    tag_reject = Map.get(params, :none, [])
+
+    params
+    |> Map.put(:type, "Create")
+    |> Map.put(:local_only, local_only)
+    |> Map.put(:blocking_user, user)
+    |> Map.put(:muting_user, user)
+    |> Map.put(:user, user)
+    |> Map.put(:tag, tags_any)
+    |> Map.put(:tag_all, tag_all)
+    |> Map.put(:tag_reject, tag_reject)
+    |> ActivityPub.fetch_public_activities()
   end
 
   # GET /api/v1/timelines/tag/:tag
diff --git a/lib/pleroma/web/mastodon_api/views/account_view.ex b/lib/pleroma/web/mastodon_api/views/account_view.ex
index ac25aefdd..9e9de33f6 100644
--- a/lib/pleroma/web/mastodon_api/views/account_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/account_view.ex
@@ -292,6 +292,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
     |> maybe_put_allow_following_move(user, opts[:for])
     |> maybe_put_unread_conversation_count(user, opts[:for])
     |> maybe_put_unread_notification_count(user, opts[:for])
+    |> maybe_put_email_address(user, opts[:for])
   end
 
   defp username_from_nickname(string) when is_binary(string) do
@@ -403,6 +404,16 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
 
   defp maybe_put_unread_notification_count(data, _, _), do: data
 
+  defp maybe_put_email_address(data, %User{id: user_id}, %User{id: user_id} = user) do
+    Kernel.put_in(
+      data,
+      [:pleroma, :email],
+      user.email
+    )
+  end
+
+  defp maybe_put_email_address(data, _, _), do: data
+
   defp image_url(%{"url" => [%{"href" => href} | _]}), do: href
   defp image_url(_), do: nil
 end
diff --git a/lib/pleroma/web/mastodon_api/views/custom_emoji_view.ex b/lib/pleroma/web/mastodon_api/views/custom_emoji_view.ex
index 40e314164..7d2d605e9 100644
--- a/lib/pleroma/web/mastodon_api/views/custom_emoji_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/custom_emoji_view.ex
@@ -6,14 +6,14 @@ defmodule Pleroma.Web.MastodonAPI.CustomEmojiView do
   use Pleroma.Web, :view
 
   alias Pleroma.Emoji
-  alias Pleroma.Web
+  alias Pleroma.Web.Endpoint
 
   def render("index.json", %{custom_emojis: custom_emojis}) do
     render_many(custom_emojis, __MODULE__, "show.json")
   end
 
   def render("show.json", %{custom_emoji: {shortcode, %Emoji{file: relative_url, tags: tags}}}) do
-    url = Web.base_url() |> URI.merge(relative_url) |> to_string()
+    url = Endpoint.url() |> URI.merge(relative_url) |> to_string()
 
     %{
       "shortcode" => shortcode,
diff --git a/lib/pleroma/web/mastodon_api/views/follow_request_view.ex b/lib/pleroma/web/mastodon_api/views/follow_request_view.ex
new file mode 100644
index 000000000..4c7d9fc65
--- /dev/null
+++ b/lib/pleroma/web/mastodon_api/views/follow_request_view.ex
@@ -0,0 +1,10 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.FollowRequestView do
+  use Pleroma.Web, :view
+  alias Pleroma.Web.MastodonAPI
+
+  def render(view, opts), do: MastodonAPI.AccountView.render(view, opts)
+end
diff --git a/lib/pleroma/web/mastodon_api/views/instance_view.ex b/lib/pleroma/web/mastodon_api/views/instance_view.ex
index 73205fb6d..3528185d5 100644
--- a/lib/pleroma/web/mastodon_api/views/instance_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/instance_view.ex
@@ -14,7 +14,7 @@ defmodule Pleroma.Web.MastodonAPI.InstanceView do
     instance = Config.get(:instance)
 
     %{
-      uri: Pleroma.Web.base_url(),
+      uri: Pleroma.Web.Endpoint.url(),
       title: Keyword.get(instance, :name),
       description: Keyword.get(instance, :description),
       version: "#{@mastodon_api_level} (compatible; #{Pleroma.Application.named_version()})",
@@ -23,7 +23,9 @@ defmodule Pleroma.Web.MastodonAPI.InstanceView do
         streaming_api: Pleroma.Web.Endpoint.websocket_url()
       },
       stats: Pleroma.Stats.get_stats(),
-      thumbnail: Pleroma.Web.base_url() <> Keyword.get(instance, :instance_thumbnail),
+      thumbnail:
+        URI.merge(Pleroma.Web.Endpoint.url(), Keyword.get(instance, :instance_thumbnail))
+        |> to_string,
       languages: ["en"],
       registrations: Keyword.get(instance, :registrations_open),
       approval_required: Keyword.get(instance, :account_approval_required),
@@ -34,8 +36,8 @@ defmodule Pleroma.Web.MastodonAPI.InstanceView do
       avatar_upload_limit: Keyword.get(instance, :avatar_upload_limit),
       background_upload_limit: Keyword.get(instance, :background_upload_limit),
       banner_upload_limit: Keyword.get(instance, :banner_upload_limit),
-      background_image: Pleroma.Web.base_url() <> Keyword.get(instance, :background_image),
-      chat_limit: Keyword.get(instance, :chat_limit),
+      background_image: Pleroma.Web.Endpoint.url() <> Keyword.get(instance, :background_image),
+      shout_limit: Config.get([:shout, :limit]),
       description_limit: Keyword.get(instance, :description_limit),
       pleroma: %{
         metadata: %{
@@ -67,9 +69,13 @@ defmodule Pleroma.Web.MastodonAPI.InstanceView do
       if Config.get([:gopher, :enabled]) do
         "gopher"
       end,
-      if Config.get([:chat, :enabled]) do
+      # backwards compat
+      if Config.get([:shout, :enabled]) do
         "chat"
       end,
+      if Config.get([:shout, :enabled]) do
+        "shout"
+      end,
       if Config.get([:instance, :allow_relay]) do
         "relay"
       end,
diff --git a/lib/pleroma/web/mastodon_api/views/media_view.ex b/lib/pleroma/web/mastodon_api/views/media_view.ex
new file mode 100644
index 000000000..cf521887e
--- /dev/null
+++ b/lib/pleroma/web/mastodon_api/views/media_view.ex
@@ -0,0 +1,10 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.MediaView do
+  use Pleroma.Web, :view
+  alias Pleroma.Web.MastodonAPI
+
+  def render(view, opts), do: MastodonAPI.StatusView.render(view, opts)
+end
diff --git a/lib/pleroma/web/mastodon_api/views/status_view.ex b/lib/pleroma/web/mastodon_api/views/status_view.ex
index bac897a57..da44e0a74 100644
--- a/lib/pleroma/web/mastodon_api/views/status_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/status_view.ex
@@ -9,6 +9,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
 
   alias Pleroma.Activity
   alias Pleroma.HTML
+  alias Pleroma.Maps
   alias Pleroma.Object
   alias Pleroma.Repo
   alias Pleroma.User
@@ -124,16 +125,16 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       ) do
     user = CommonAPI.get_user(activity.data["actor"])
     created_at = Utils.to_masto_date(activity.data["published"])
-    activity_object = Object.normalize(activity, fetch: false)
+    object = Object.normalize(activity, fetch: false)
 
     reblogged_parent_activity =
       if opts[:parent_activities] do
         Activity.Queries.find_by_object_ap_id(
           opts[:parent_activities],
-          activity_object.data["id"]
+          object.data["id"]
         )
       else
-        Activity.create_by_object_ap_id(activity_object.data["id"])
+        Activity.create_by_object_ap_id(object.data["id"])
         |> Activity.with_preloaded_bookmark(opts[:for])
         |> Activity.with_set_thread_muted_field(opts[:for])
         |> Repo.one()
@@ -142,7 +143,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
     reblog_rendering_opts = Map.put(opts, :activity, reblogged_parent_activity)
     reblogged = render("show.json", reblog_rendering_opts)
 
-    favorited = opts[:for] && opts[:for].ap_id in (activity_object.data["likes"] || [])
+    favorited = opts[:for] && opts[:for].ap_id in (object.data["likes"] || [])
 
     bookmarked = Activity.get_bookmark(reblogged_parent_activity, opts[:for]) != nil
 
@@ -152,10 +153,12 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       |> Enum.filter(& &1)
       |> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
 
+    {pinned?, pinned_at} = pin_data(object, user)
+
     %{
       id: to_string(activity.id),
-      uri: activity_object.data["id"],
-      url: activity_object.data["id"],
+      uri: object.data["id"],
+      url: object.data["id"],
       account:
         AccountView.render("show.json", %{
           user: user,
@@ -173,18 +176,19 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       favourited: present?(favorited),
       bookmarked: present?(bookmarked),
       muted: false,
-      pinned: pinned?(activity, user),
+      pinned: pinned?,
       sensitive: false,
       spoiler_text: "",
       visibility: get_visibility(activity),
       media_attachments: reblogged[:media_attachments] || [],
       mentions: mentions,
       tags: reblogged[:tags] || [],
-      application: build_application(activity_object.data["generator"]),
+      application: build_application(object.data["generator"]),
       language: nil,
       emojis: [],
       pleroma: %{
-        local: activity.local
+        local: activity.local,
+        pinned_at: pinned_at
       }
     }
   end
@@ -198,8 +202,10 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
     like_count = object.data["like_count"] || 0
     announcement_count = object.data["announcement_count"] || 0
 
-    tags = object.data["tag"] || []
-    sensitive = object.data["sensitive"] || Enum.member?(tags, "nsfw")
+    hashtags = Object.hashtags(object)
+    sensitive = object.data["sensitive"] || Enum.member?(hashtags, "nsfw")
+
+    tags = Object.tags(object)
 
     tag_mentions =
       tags
@@ -254,7 +260,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
 
     content_html =
       content
-      |> HTML.get_cached_scrubbed_html_for_activity(
+      |> Activity.HTML.get_cached_scrubbed_html_for_activity(
         User.html_filter_policy(opts[:for]),
         activity,
         "mastoapi:content"
@@ -262,7 +268,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
 
     content_plaintext =
       content
-      |> HTML.get_cached_stripped_html_for_activity(
+      |> Activity.HTML.get_cached_stripped_html_for_activity(
         activity,
         "mastoapi:content"
       )
@@ -314,6 +320,8 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
           fn for_user, user -> User.mutes?(for_user, user) end
         )
 
+    {pinned?, pinned_at} = pin_data(object, user)
+
     %{
       id: to_string(activity.id),
       uri: object.data["id"],
@@ -337,7 +345,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       favourited: present?(favorited),
       bookmarked: present?(bookmarked),
       muted: muted,
-      pinned: pinned?(activity, user),
+      pinned: pinned?,
       sensitive: sensitive,
       spoiler_text: summary,
       visibility: get_visibility(object),
@@ -358,7 +366,8 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
         direct_conversation_id: direct_conversation_id,
         thread_muted: thread_muted?,
         emoji_reactions: emoji_reactions,
-        parent_visible: visible_for_user?(reply_to, opts[:for])
+        parent_visible: visible_for_user?(reply_to, opts[:for]),
+        pinned_at: pinned_at
       }
     }
   end
@@ -379,12 +388,15 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
 
     page_url = page_url_data |> to_string
 
-    image_url =
+    image_url_data =
       if is_binary(rich_media["image"]) do
-        URI.merge(page_url_data, URI.parse(rich_media["image"]))
-        |> to_string
+        URI.parse(rich_media["image"])
+      else
+        nil
       end
 
+    image_url = build_image_url(image_url_data, page_url_data)
+
     %{
       type: "link",
       provider_name: page_url_data.host,
@@ -406,6 +418,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
     media_type = attachment_url["mediaType"] || attachment_url["mimeType"] || "image"
     href = attachment_url["href"] |> MediaProxy.url()
     href_preview = attachment_url["href"] |> MediaProxy.preview_url()
+    meta = render("attachment_meta.json", %{attachment: attachment})
 
     type =
       cond do
@@ -428,8 +441,24 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       pleroma: %{mime_type: media_type},
       blurhash: attachment["blurhash"]
     }
+    |> Maps.put_if_present(:meta, meta)
+  end
+
+  def render("attachment_meta.json", %{
+        attachment: %{"url" => [%{"width" => width, "height" => height} | _]}
+      })
+      when is_integer(width) and is_integer(height) do
+    %{
+      original: %{
+        width: width,
+        height: height,
+        aspect: width / height
+      }
+    }
   end
 
+  def render("attachment_meta.json", _), do: nil
+
   def render("context.json", %{activity: activity, activities: activities, user: user}) do
     %{ancestors: ancestors, descendants: descendants} =
       activities
@@ -485,7 +514,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
   def build_tags(object_tags) when is_list(object_tags) do
     object_tags
     |> Enum.filter(&is_binary/1)
-    |> Enum.map(&%{name: &1, url: "#{Pleroma.Web.base_url()}/tag/#{URI.encode(&1)}"})
+    |> Enum.map(&%{name: &1, url: "#{Pleroma.Web.Endpoint.url()}/tag/#{URI.encode(&1)}"})
   end
 
   def build_tags(_), do: []
@@ -524,8 +553,13 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
   defp present?(false), do: false
   defp present?(_), do: true
 
-  defp pinned?(%Activity{id: id}, %User{pinned_activities: pinned_activities}),
-    do: id in pinned_activities
+  defp pin_data(%Object{data: %{"id" => object_id}}, %User{pinned_objects: pinned_objects}) do
+    if pinned_at = pinned_objects[object_id] do
+      {true, Utils.to_masto_date(pinned_at)}
+    else
+      {false, nil}
+    end
+  end
 
   defp build_emoji_map(emoji, users, current_user) do
     %{
@@ -536,6 +570,27 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
   end
 
   @spec build_application(map() | nil) :: map() | nil
-  defp build_application(%{type: _type, name: name, url: url}), do: %{name: name, website: url}
+  defp build_application(%{"type" => _type, "name" => name, "url" => url}),
+    do: %{name: name, website: url}
+
   defp build_application(_), do: nil
+
+  # Workaround for Elixir issue #10771
+  # Avoid applying URI.merge unless necessary
+  # TODO: revert to always attempting URI.merge(image_url_data, page_url_data)
+  # when Elixir 1.12 is the minimum supported version
+  @spec build_image_url(struct() | nil, struct()) :: String.t() | nil
+  defp build_image_url(
+         %URI{scheme: image_scheme, host: image_host} = image_url_data,
+         %URI{} = _page_url_data
+       )
+       when not is_nil(image_scheme) and not is_nil(image_host) do
+    image_url_data |> to_string
+  end
+
+  defp build_image_url(%URI{} = image_url_data, %URI{} = page_url_data) do
+    URI.merge(page_url_data, image_url_data) |> to_string
+  end
+
+  defp build_image_url(_, _), do: nil
 end
diff --git a/lib/pleroma/web/mastodon_api/views/timeline_view.ex b/lib/pleroma/web/mastodon_api/views/timeline_view.ex
new file mode 100644
index 000000000..91226d78e
--- /dev/null
+++ b/lib/pleroma/web/mastodon_api/views/timeline_view.ex
@@ -0,0 +1,10 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.TimelineView do
+  use Pleroma.Web, :view
+  alias Pleroma.Web.MastodonAPI
+
+  def render(view, opts), do: MastodonAPI.StatusView.render(view, opts)
+end
diff --git a/lib/pleroma/web/media_proxy.ex b/lib/pleroma/web/media_proxy.ex
index 27f337138..0b232f14b 100644
--- a/lib/pleroma/web/media_proxy.ex
+++ b/lib/pleroma/web/media_proxy.ex
@@ -6,7 +6,7 @@ defmodule Pleroma.Web.MediaProxy do
   alias Pleroma.Config
   alias Pleroma.Helpers.UriHelper
   alias Pleroma.Upload
-  alias Pleroma.Web
+  alias Pleroma.Web.Endpoint
   alias Pleroma.Web.MediaProxy.Invalidation
 
   @base64_opts [padding: false]
@@ -69,7 +69,7 @@ defmodule Pleroma.Web.MediaProxy do
   #   non-local non-whitelisted URLs through it and be sure that body size constraint is preserved.
   def preview_enabled?, do: enabled?() and !!Config.get([:media_preview_proxy, :enabled])
 
-  def local?(url), do: String.starts_with?(url, Web.base_url())
+  def local?(url), do: String.starts_with?(url, Endpoint.url())
 
   def whitelisted?(url) do
     %{host: domain} = URI.parse(url)
@@ -121,8 +121,13 @@ defmodule Pleroma.Web.MediaProxy do
     end
   end
 
+  def decode_url(encoded) do
+    [_, "proxy", sig, base64 | _] = URI.parse(encoded).path |> String.split("/")
+    decode_url(sig, base64)
+  end
+
   defp signed_url(url) do
-    :crypto.hmac(:sha, Config.get([Web.Endpoint, :secret_key_base]), url)
+    :crypto.mac(:hmac, :sha, Config.get([Endpoint, :secret_key_base]), url)
   end
 
   def filename(url_or_path) do
@@ -130,7 +135,7 @@ defmodule Pleroma.Web.MediaProxy do
   end
 
   def base_url do
-    Config.get([:media_proxy, :base_url], Web.base_url())
+    Config.get([:media_proxy, :base_url], Endpoint.url())
   end
 
   defp proxy_url(path, sig_base64, url_base64, filename) do
diff --git a/lib/pleroma/web/metadata/utils.ex b/lib/pleroma/web/metadata/utils.ex
index de7195435..bc31d66b9 100644
--- a/lib/pleroma/web/metadata/utils.ex
+++ b/lib/pleroma/web/metadata/utils.ex
@@ -3,6 +3,7 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Metadata.Utils do
+  alias Pleroma.Activity
   alias Pleroma.Emoji
   alias Pleroma.Formatter
   alias Pleroma.HTML
@@ -13,7 +14,7 @@ defmodule Pleroma.Web.Metadata.Utils do
     # html content comes from DB already encoded, decode first and scrub after
     |> HtmlEntities.decode()
     |> String.replace(~r/<br\s?\/?>/, " ")
-    |> HTML.get_cached_stripped_html_for_activity(object, "metadata")
+    |> Activity.HTML.get_cached_stripped_html_for_activity(object, "metadata")
     |> Emoji.Formatter.demojify()
     |> HtmlEntities.decode()
     |> Formatter.truncate()
diff --git a/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex b/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
index bca94d236..69ec27ba0 100644
--- a/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
+++ b/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
@@ -5,7 +5,7 @@
 defmodule Pleroma.Web.Nodeinfo.NodeinfoController do
   use Pleroma.Web, :controller
 
-  alias Pleroma.Web
+  alias Pleroma.Web.Endpoint
   alias Pleroma.Web.Nodeinfo.Nodeinfo
 
   def schemas(conn, _params) do
@@ -13,11 +13,11 @@ defmodule Pleroma.Web.Nodeinfo.NodeinfoController do
       links: [
         %{
           rel: "http://nodeinfo.diaspora.software/ns/schema/2.0",
-          href: Web.base_url() <> "/nodeinfo/2.0.json"
+          href: Endpoint.url() <> "/nodeinfo/2.0.json"
         },
         %{
           rel: "http://nodeinfo.diaspora.software/ns/schema/2.1",
-          href: Web.base_url() <> "/nodeinfo/2.1.json"
+          href: Endpoint.url() <> "/nodeinfo/2.1.json"
         }
       ]
     }
diff --git a/lib/pleroma/web/o_auth/o_auth_controller.ex b/lib/pleroma/web/o_auth/o_auth_controller.ex
index 215d97b3a..42f4d768f 100644
--- a/lib/pleroma/web/o_auth/o_auth_controller.ex
+++ b/lib/pleroma/web/o_auth/o_auth_controller.ex
@@ -427,7 +427,7 @@ defmodule Pleroma.Web.OAuth.OAuthController do
       |> Map.put("state", state)
 
     # Handing the request to Ueberauth
-    redirect(conn, to: o_auth_path(conn, :request, provider, params))
+    redirect(conn, to: Routes.o_auth_path(conn, :request, provider, params))
   end
 
   def request(%Plug.Conn{} = conn, params) do
@@ -601,7 +601,7 @@ defmodule Pleroma.Web.OAuth.OAuthController do
   end
 
   # Special case: Local MastodonFE
-  defp redirect_uri(%Plug.Conn{} = conn, "."), do: auth_url(conn, :login)
+  defp redirect_uri(%Plug.Conn{} = conn, "."), do: Routes.auth_url(conn, :login)
 
   defp redirect_uri(%Plug.Conn{}, redirect_uri), do: redirect_uri
 
diff --git a/lib/pleroma/web/o_auth/o_auth_view.ex b/lib/pleroma/web/o_auth/o_auth_view.ex
index 281bbcc3c..1419c96a2 100644
--- a/lib/pleroma/web/o_auth/o_auth_view.ex
+++ b/lib/pleroma/web/o_auth/o_auth_view.ex
@@ -10,6 +10,7 @@ defmodule Pleroma.Web.OAuth.OAuthView do
 
   def render("token.json", %{token: token} = opts) do
     response = %{
+      id: token.id,
       token_type: "Bearer",
       access_token: token.token,
       refresh_token: token.refresh_token,
diff --git a/lib/pleroma/web/pleroma_api/controllers/account_controller.ex b/lib/pleroma/web/pleroma_api/controllers/account_controller.ex
index 165afd3b4..6e01c5497 100644
--- a/lib/pleroma/web/pleroma_api/controllers/account_controller.ex
+++ b/lib/pleroma/web/pleroma_api/controllers/account_controller.ex
@@ -47,7 +47,6 @@ defmodule Pleroma.Web.PleromaAPI.AccountController do
   plug(RateLimiter, [name: :account_confirmation_resend] when action == :confirmation_resend)
 
   plug(:assign_account_by_id when action in [:favourites, :subscribe, :unsubscribe])
-  plug(:put_view, Pleroma.Web.MastodonAPI.AccountView)
 
   defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.PleromaAccountOperation
 
diff --git a/lib/pleroma/web/pleroma_api/controllers/backup_controller.ex b/lib/pleroma/web/pleroma_api/controllers/backup_controller.ex
index 315657e9c..fc5d16771 100644
--- a/lib/pleroma/web/pleroma_api/controllers/backup_controller.ex
+++ b/lib/pleroma/web/pleroma_api/controllers/backup_controller.ex
@@ -10,7 +10,7 @@ defmodule Pleroma.Web.PleromaAPI.BackupController do
 
   action_fallback(Pleroma.Web.MastodonAPI.FallbackController)
   plug(OAuthScopesPlug, %{scopes: ["read:accounts"]} when action in [:index, :create])
-  plug(OpenApiSpex.Plug.CastAndValidate, render_error: Pleroma.Web.ApiSpec.RenderError)
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
 
   defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.PleromaBackupOperation
 
diff --git a/lib/pleroma/web/pleroma_api/controllers/chat_controller.ex b/lib/pleroma/web/pleroma_api/controllers/chat_controller.ex
index 4adc685fe..dcd54b1af 100644
--- a/lib/pleroma/web/pleroma_api/controllers/chat_controller.ex
+++ b/lib/pleroma/web/pleroma_api/controllers/chat_controller.ex
@@ -38,7 +38,7 @@ defmodule Pleroma.Web.PleromaAPI.ChatController do
     %{scopes: ["read:chats"]} when action in [:messages, :index, :index2, :show]
   )
 
-  plug(OpenApiSpex.Plug.CastAndValidate, render_error: Pleroma.Web.ApiSpec.RenderError)
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
 
   defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.ChatOperation
 
diff --git a/lib/pleroma/web/pleroma_api/controllers/conversation_controller.ex b/lib/pleroma/web/pleroma_api/controllers/conversation_controller.ex
index d285e4907..be2f4617d 100644
--- a/lib/pleroma/web/pleroma_api/controllers/conversation_controller.ex
+++ b/lib/pleroma/web/pleroma_api/controllers/conversation_controller.ex
@@ -13,7 +13,6 @@ defmodule Pleroma.Web.PleromaAPI.ConversationController do
   alias Pleroma.Web.Plugs.OAuthScopesPlug
 
   plug(Pleroma.Web.ApiSpec.CastAndValidate)
-  plug(:put_view, Pleroma.Web.MastodonAPI.ConversationView)
   plug(OAuthScopesPlug, %{scopes: ["read:statuses"]} when action in [:show, :statuses])
 
   plug(
diff --git a/lib/pleroma/web/pleroma_api/controllers/notification_controller.ex b/lib/pleroma/web/pleroma_api/controllers/notification_controller.ex
index 257bcd550..bcb3a9ae1 100644
--- a/lib/pleroma/web/pleroma_api/controllers/notification_controller.ex
+++ b/lib/pleroma/web/pleroma_api/controllers/notification_controller.ex
@@ -14,8 +14,6 @@ defmodule Pleroma.Web.PleromaAPI.NotificationController do
     %{scopes: ["write:notifications"]} when action == :mark_as_read
   )
 
-  plug(:put_view, Pleroma.Web.MastodonAPI.NotificationView)
-
   defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.PleromaNotificationOperation
 
   def mark_as_read(%{assigns: %{user: user}, body_params: %{id: notification_id}} = conn, _) do
diff --git a/lib/pleroma/web/pleroma_api/controllers/user_import_controller.ex b/lib/pleroma/web/pleroma_api/controllers/user_import_controller.ex
index 6d9a11fb6..078d470d9 100644
--- a/lib/pleroma/web/pleroma_api/controllers/user_import_controller.ex
+++ b/lib/pleroma/web/pleroma_api/controllers/user_import_controller.ex
@@ -15,7 +15,7 @@ defmodule Pleroma.Web.PleromaAPI.UserImportController do
   plug(OAuthScopesPlug, %{scopes: ["follow", "write:blocks"]} when action == :blocks)
   plug(OAuthScopesPlug, %{scopes: ["follow", "write:mutes"]} when action == :mutes)
 
-  plug(OpenApiSpex.Plug.CastAndValidate)
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
   defdelegate open_api_operation(action), to: ApiSpec.UserImportOperation
 
   def follow(%{body_params: %{list: %Plug.Upload{path: path}}} = conn, _) do
diff --git a/lib/pleroma/web/pleroma_api/views/account_view.ex b/lib/pleroma/web/pleroma_api/views/account_view.ex
new file mode 100644
index 000000000..28941f471
--- /dev/null
+++ b/lib/pleroma/web/pleroma_api/views/account_view.ex
@@ -0,0 +1,10 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.PleromaAPI.AccountView do
+  use Pleroma.Web, :view
+  alias Pleroma.Web.MastodonAPI
+
+  def render(view, opts), do: MastodonAPI.AccountView.render(view, opts)
+end
diff --git a/lib/pleroma/web/pleroma_api/views/conversation_view.ex b/lib/pleroma/web/pleroma_api/views/conversation_view.ex
new file mode 100644
index 000000000..173006360
--- /dev/null
+++ b/lib/pleroma/web/pleroma_api/views/conversation_view.ex
@@ -0,0 +1,10 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.PleromaAPI.ConversationView do
+  use Pleroma.Web, :view
+  alias Pleroma.Web.MastodonAPI
+
+  def render(view, opts), do: MastodonAPI.ConversationView.render(view, opts)
+end
diff --git a/lib/pleroma/web/pleroma_api/views/notification_view.ex b/lib/pleroma/web/pleroma_api/views/notification_view.ex
new file mode 100644
index 000000000..36b2fdfe8
--- /dev/null
+++ b/lib/pleroma/web/pleroma_api/views/notification_view.ex
@@ -0,0 +1,10 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.PleromaAPI.NotificationView do
+  use Pleroma.Web, :view
+  alias Pleroma.Web.MastodonAPI
+
+  def render(view, opts), do: MastodonAPI.NotificationView.render(view, opts)
+end
diff --git a/lib/pleroma/web/plugs/frontend_static.ex b/lib/pleroma/web/plugs/frontend_static.ex
index eb385e94d..ebe7eaf86 100644
--- a/lib/pleroma/web/plugs/frontend_static.ex
+++ b/lib/pleroma/web/plugs/frontend_static.ex
@@ -10,8 +10,6 @@ defmodule Pleroma.Web.Plugs.FrontendStatic do
   """
   @behaviour Plug
 
-  @api_routes Pleroma.Web.get_api_routes()
-
   def file_path(path, frontend_type \\ :primary) do
     if configuration = Pleroma.Config.get([:frontends, frontend_type]) do
       instance_static_path = Pleroma.Config.get([:instance, :static_dir], "instance/static")
@@ -55,10 +53,13 @@ defmodule Pleroma.Web.Plugs.FrontendStatic do
   defp invalid_path?([h | t], match), do: String.contains?(h, match) or invalid_path?(t)
   defp invalid_path?([], _match), do: false
 
-  defp api_route?([h | _]) when h in @api_routes, do: true
-  defp api_route?([_ | t]), do: api_route?(t)
   defp api_route?([]), do: false
 
+  defp api_route?([h | t]) do
+    api_routes = Pleroma.Web.Router.get_api_routes()
+    if h in api_routes, do: true, else: api_route?(t)
+  end
+
   defp call_static(conn, opts, from) do
     opts = Map.put(opts, :from, from)
     Plug.Static.call(conn, opts)
diff --git a/lib/pleroma/web/plugs/http_security_plug.ex b/lib/pleroma/web/plugs/http_security_plug.ex
index 0025b042a..d1e6cc9d3 100644
--- a/lib/pleroma/web/plugs/http_security_plug.ex
+++ b/lib/pleroma/web/plugs/http_security_plug.ex
@@ -48,7 +48,8 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do
       {"x-content-type-options", "nosniff"},
       {"referrer-policy", referrer_policy},
       {"x-download-options", "noopen"},
-      {"content-security-policy", csp_string()}
+      {"content-security-policy", csp_string()},
+      {"permissions-policy", "interest-cohort=()"}
     ]
 
     headers =
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index 72ad14f05..efca7078a 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -140,6 +140,10 @@ defmodule Pleroma.Web.Router do
     plug(Pleroma.Web.Plugs.MappedSignatureToIdentityPlug)
   end
 
+  pipeline :static_fe do
+    plug(Pleroma.Web.Plugs.StaticFEPlug)
+  end
+
   scope "/api/v1/pleroma", Pleroma.Web.TwitterAPI do
     pipe_through(:pleroma_api)
 
@@ -204,7 +208,7 @@ defmodule Pleroma.Web.Router do
     get("/users/:nickname/credentials", AdminAPIController, :show_user_credentials)
     patch("/users/:nickname/credentials", AdminAPIController, :update_user_credentials)
 
-    get("/users", UserController, :list)
+    get("/users", UserController, :index)
     get("/users/:nickname", UserController, :show)
     get("/users/:nickname/statuses", AdminAPIController, :list_user_statuses)
     get("/users/:nickname/chats", AdminAPIController, :list_user_chats)
@@ -620,18 +624,12 @@ defmodule Pleroma.Web.Router do
 
     get("/oauth_tokens", TwitterAPI.Controller, :oauth_tokens)
     delete("/oauth_tokens/:id", TwitterAPI.Controller, :revoke_token)
-
-    post(
-      "/qvitter/statuses/notifications/read",
-      TwitterAPI.Controller,
-      :mark_notifications_as_read
-    )
   end
 
   scope "/", Pleroma.Web do
     # Note: html format is supported only if static FE is enabled
     # Note: http signature is only considered for json requests (no auth for non-json requests)
-    pipe_through([:accepts_html_json, :http_signature, Pleroma.Web.Plugs.StaticFEPlug])
+    pipe_through([:accepts_html_json, :http_signature, :static_fe])
 
     get("/objects/:uuid", OStatus.OStatusController, :object)
     get("/activities/:uuid", OStatus.OStatusController, :activity)
@@ -645,7 +643,7 @@ defmodule Pleroma.Web.Router do
   scope "/", Pleroma.Web do
     # Note: html format is supported only if static FE is enabled
     # Note: http signature is only considered for json requests (no auth for non-json requests)
-    pipe_through([:accepts_html_xml_json, :http_signature, Pleroma.Web.Plugs.StaticFEPlug])
+    pipe_through([:accepts_html_xml_json, :http_signature, :static_fe])
 
     # Note: returns user _profile_ for json requests, redirects to user _feed_ for non-json ones
     get("/users/:nickname", Feed.UserController, :feed_redirect, as: :user_feed)
@@ -653,7 +651,7 @@ defmodule Pleroma.Web.Router do
 
   scope "/", Pleroma.Web do
     # Note: html format is supported only if static FE is enabled
-    pipe_through([:accepts_html_xml, Pleroma.Web.Plugs.StaticFEPlug])
+    pipe_through([:accepts_html_xml, :static_fe])
 
     get("/users/:nickname/feed", Feed.UserController, :feed, as: :user_feed)
   end
@@ -704,6 +702,7 @@ defmodule Pleroma.Web.Router do
     # The following two are S2S as well, see `ActivityPub.fetch_follow_information_for_user/1`:
     get("/users/:nickname/followers", ActivityPubController, :followers)
     get("/users/:nickname/following", ActivityPubController, :following)
+    get("/users/:nickname/collections/featured", ActivityPubController, :pinned)
   end
 
   scope "/", Pleroma.Web.ActivityPub do
@@ -764,11 +763,11 @@ defmodule Pleroma.Web.Router do
     get("/embed/:id", EmbedController, :show)
   end
 
-  scope "/proxy/", Pleroma.Web.MediaProxy do
-    get("/preview/:sig/:url", MediaProxyController, :preview)
-    get("/preview/:sig/:url/:filename", MediaProxyController, :preview)
-    get("/:sig/:url", MediaProxyController, :remote)
-    get("/:sig/:url/:filename", MediaProxyController, :remote)
+  scope "/proxy/", Pleroma.Web do
+    get("/preview/:sig/:url", MediaProxy.MediaProxyController, :preview)
+    get("/preview/:sig/:url/:filename", MediaProxy.MediaProxyController, :preview)
+    get("/:sig/:url", MediaProxy.MediaProxyController, :remote)
+    get("/:sig/:url/:filename", MediaProxy.MediaProxyController, :remote)
   end
 
   if Pleroma.Config.get(:env) == :dev do
@@ -821,4 +820,16 @@ defmodule Pleroma.Web.Router do
 
     options("/*path", RedirectController, :empty)
   end
+
+  # TODO: Change to Phoenix.Router.routes/1 for Phoenix 1.6.0+
+  def get_api_routes do
+    __MODULE__.__routes__()
+    |> Enum.reject(fn r -> r.plug == Pleroma.Web.Fallback.RedirectController end)
+    |> Enum.map(fn r ->
+      r.path
+      |> String.split("/", trim: true)
+      |> List.first()
+    end)
+    |> Enum.uniq()
+  end
 end
diff --git a/lib/pleroma/web/chat_channel.ex b/lib/pleroma/web/shout_channel.ex
index 4008129e9..17caecb1a 100644
--- a/lib/pleroma/web/chat_channel.ex
+++ b/lib/pleroma/web/shout_channel.ex
@@ -2,12 +2,12 @@
 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
-defmodule Pleroma.Web.ChatChannel do
+defmodule Pleroma.Web.ShoutChannel do
   use Phoenix.Channel
 
   alias Pleroma.User
-  alias Pleroma.Web.ChatChannel.ChatChannelState
   alias Pleroma.Web.MastodonAPI.AccountView
+  alias Pleroma.Web.ShoutChannel.ShoutChannelState
 
   def join("chat:public", _message, socket) do
     send(self(), :after_join)
@@ -15,18 +15,18 @@ defmodule Pleroma.Web.ChatChannel do
   end
 
   def handle_info(:after_join, socket) do
-    push(socket, "messages", %{messages: ChatChannelState.messages()})
+    push(socket, "messages", %{messages: ShoutChannelState.messages()})
     {:noreply, socket}
   end
 
   def handle_in("new_msg", %{"text" => text}, %{assigns: %{user_name: user_name}} = socket) do
     text = String.trim(text)
 
-    if String.length(text) in 1..Pleroma.Config.get([:instance, :chat_limit]) do
+    if String.length(text) in 1..Pleroma.Config.get([:shout, :limit]) do
       author = User.get_cached_by_nickname(user_name)
       author_json = AccountView.render("show.json", user: author, skip_visibility_check: true)
 
-      message = ChatChannelState.add_message(%{text: text, author: author_json})
+      message = ShoutChannelState.add_message(%{text: text, author: author_json})
 
       broadcast!(socket, "new_msg", message)
     end
@@ -35,7 +35,7 @@ defmodule Pleroma.Web.ChatChannel do
   end
 end
 
-defmodule Pleroma.Web.ChatChannel.ChatChannelState do
+defmodule Pleroma.Web.ShoutChannel.ShoutChannelState do
   use Agent
 
   @max_messages 20
diff --git a/lib/pleroma/web/static_fe/static_fe_controller.ex b/lib/pleroma/web/static_fe/static_fe_controller.ex
index fe485d10d..50f0927a3 100644
--- a/lib/pleroma/web/static_fe/static_fe_controller.ex
+++ b/lib/pleroma/web/static_fe/static_fe_controller.ex
@@ -14,7 +14,6 @@ defmodule Pleroma.Web.StaticFE.StaticFEController do
   alias Pleroma.Web.Router.Helpers
 
   plug(:put_layout, :static_fe)
-  plug(:put_view, Pleroma.Web.StaticFE.StaticFEView)
   plug(:assign_id)
 
   @page_keys ["max_id", "min_id", "limit", "since_id", "order"]
diff --git a/lib/pleroma/web/templates/feed/feed/_activity.atom.eex b/lib/pleroma/web/templates/feed/feed/_activity.atom.eex
index 3fd150c4e..57bd92468 100644
--- a/lib/pleroma/web/templates/feed/feed/_activity.atom.eex
+++ b/lib/pleroma/web/templates/feed/feed/_activity.atom.eex
@@ -22,7 +22,7 @@
     <link type="text/html" href='<%= @data["external_url"] %>' rel="alternate"/>
   <% end %>
 
-  <%= for tag <- @data["tag"] || [] do %>
+  <%= for tag <- Pleroma.Object.hashtags(@object) do %>
     <category term="<%= tag %>"></category>
   <% end %>
 
@@ -38,7 +38,7 @@
     <%= if id == Pleroma.Constants.as_public() do %>
       <link rel="mentioned" ostatus:object-type="http://activitystrea.ms/schema/1.0/collection" href="http://activityschema.org/collection/public"/>
     <% else %>
-      <%= unless Regex.match?(~r/^#{Pleroma.Web.base_url()}.+followers$/, id) do %>
+      <%= unless Regex.match?(~r/^#{Pleroma.Web.Endpoint.url()}.+followers$/, id) do %>
         <link rel="mentioned" ostatus:object-type="http://activitystrea.ms/schema/1.0/person" href="<%= id %>"/>
       <% end %>
     <% end %>
diff --git a/lib/pleroma/web/templates/feed/feed/_activity.rss.eex b/lib/pleroma/web/templates/feed/feed/_activity.rss.eex
index 947bbb099..279f2171d 100644
--- a/lib/pleroma/web/templates/feed/feed/_activity.rss.eex
+++ b/lib/pleroma/web/templates/feed/feed/_activity.rss.eex
@@ -22,7 +22,7 @@
 
   <link rel="ostatus:conversation"><%= activity_context(@activity) %></link>
 
-  <%= for tag <- @data["tag"] || [] do %>
+  <%= for tag <- Pleroma.Object.hashtags(@object) do %>
     <category term="<%= tag %>"></category>
   <% end %>
 
@@ -38,7 +38,7 @@
     <%= if id == Pleroma.Constants.as_public() do %>
       <link rel="mentioned" ostatus:object-type="http://activitystrea.ms/schema/1.0/collection">http://activityschema.org/collection/public</link>
     <% else %>
-      <%= unless Regex.match?(~r/^#{Pleroma.Web.base_url()}.+followers$/, id) do %>
+      <%= unless Regex.match?(~r/^#{Pleroma.Web.Endpoint.url()}.+followers$/, id) do %>
         <link rel="mentioned" ostatus:object-type="http://activitystrea.ms/schema/1.0/person"><%= id %></link>
       <% end %>
     <% end %>
diff --git a/lib/pleroma/web/templates/feed/feed/_tag_activity.atom.eex b/lib/pleroma/web/templates/feed/feed/_tag_activity.atom.eex
index cf5874a91..aa3035bca 100644
--- a/lib/pleroma/web/templates/feed/feed/_tag_activity.atom.eex
+++ b/lib/pleroma/web/templates/feed/feed/_tag_activity.atom.eex
@@ -33,7 +33,7 @@
           ostatus:object-type="http://activitystrea.ms/schema/1.0/collection"
           href="http://activityschema.org/collection/public"/>
       <% else %>
-        <%= unless Regex.match?(~r/^#{Pleroma.Web.base_url()}.+followers$/, id) do %>
+        <%= unless Regex.match?(~r/^#{Pleroma.Web.Endpoint.url()}.+followers$/, id) do %>
           <link rel="mentioned"
             ostatus:object-type="http://activitystrea.ms/schema/1.0/person"
             href="<%= id %>" />
@@ -41,7 +41,7 @@
       <% end %>
     <% end %>
 
-    <%= for tag <- @data["tag"] || [] do %>
+    <%= for tag <- Pleroma.Object.hashtags(@object) do %>
       <category term="<%= tag %>"></category>
     <% end %>
 
diff --git a/lib/pleroma/web/templates/feed/feed/tag.atom.eex b/lib/pleroma/web/templates/feed/feed/tag.atom.eex
index a288539ed..de0731085 100644
--- a/lib/pleroma/web/templates/feed/feed/tag.atom.eex
+++ b/lib/pleroma/web/templates/feed/feed/tag.atom.eex
@@ -9,13 +9,13 @@
       xmlns:ostatus="http://ostatus.org/schema/1.0"
       xmlns:statusnet="http://status.net/schema/api/1/">
 
-    <id><%= '#{tag_feed_url(@conn, :feed, @tag)}.rss' %></id>
+    <id><%= '#{Routes.tag_feed_url(@conn, :feed, @tag)}.rss' %></id>
     <title>#<%= @tag %></title>
 
     <subtitle>These are public toots tagged with #<%= @tag %>. You can interact with them if you have an account anywhere in the fediverse.</subtitle>
     <logo><%= feed_logo() %></logo>
     <updated><%= most_recent_update(@activities) %></updated>
-    <link rel="self" href="<%= '#{tag_feed_url(@conn, :feed, @tag)}.atom'  %>" type="application/atom+xml"/>
+    <link rel="self" href="<%= '#{Routes.tag_feed_url(@conn, :feed, @tag)}.atom'  %>" type="application/atom+xml"/>
     <%= for activity <- @activities do %>
     <%= render @view_module, "_tag_activity.atom", Map.merge(assigns, prepare_activity(activity, actor: true)) %>
     <% end %>
diff --git a/lib/pleroma/web/templates/feed/feed/tag.rss.eex b/lib/pleroma/web/templates/feed/feed/tag.rss.eex
index eeda01a04..9c3613feb 100644
--- a/lib/pleroma/web/templates/feed/feed/tag.rss.eex
+++ b/lib/pleroma/web/templates/feed/feed/tag.rss.eex
@@ -5,7 +5,7 @@
 
     <title>#<%= @tag %></title>
     <description>These are public toots tagged with #<%= @tag %>. You can interact with them if you have an account anywhere in the fediverse.</description>
-    <link><%= '#{tag_feed_url(@conn, :feed, @tag)}.rss' %></link>
+    <link><%= '#{Routes.tag_feed_url(@conn, :feed, @tag)}.rss' %></link>
     <webfeeds:logo><%= feed_logo() %></webfeeds:logo>
     <webfeeds:accentColor>2b90d9</webfeeds:accentColor>
     <%= for activity <- @activities do %>
diff --git a/lib/pleroma/web/templates/feed/feed/user.atom.eex b/lib/pleroma/web/templates/feed/feed/user.atom.eex
index c6acd848f..5c1f0ecbc 100644
--- a/lib/pleroma/web/templates/feed/feed/user.atom.eex
+++ b/lib/pleroma/web/templates/feed/feed/user.atom.eex
@@ -6,16 +6,16 @@
   xmlns:poco="http://portablecontacts.net/spec/1.0"
   xmlns:ostatus="http://ostatus.org/schema/1.0">
 
-  <id><%= user_feed_url(@conn, :feed, @user.nickname) <> ".atom" %></id>
+  <id><%= Routes.user_feed_url(@conn, :feed, @user.nickname) <> ".atom" %></id>
   <title><%= @user.nickname <> "'s timeline" %></title>
   <updated><%= most_recent_update(@activities, @user) %></updated>
   <logo><%= logo(@user) %></logo>
-  <link rel="self" href="<%= '#{user_feed_url(@conn, :feed, @user.nickname)}.atom' %>" type="application/atom+xml"/>
+  <link rel="self" href="<%= '#{Routes.user_feed_url(@conn, :feed, @user.nickname)}.atom' %>" type="application/atom+xml"/>
 
   <%= render @view_module, "_author.atom", assigns %>
 
   <%= if last_activity(@activities) do %>
-    <link rel="next" href="<%= '#{user_feed_url(@conn, :feed, @user.nickname)}.atom?max_id=#{last_activity(@activities).id}' %>" type="application/atom+xml"/>
+    <link rel="next" href="<%= '#{Routes.user_feed_url(@conn, :feed, @user.nickname)}.atom?max_id=#{last_activity(@activities).id}' %>" type="application/atom+xml"/>
   <% end %>
 
   <%= for activity <- @activities do %>
diff --git a/lib/pleroma/web/templates/feed/feed/user.rss.eex b/lib/pleroma/web/templates/feed/feed/user.rss.eex
index d69120480..6b842a085 100644
--- a/lib/pleroma/web/templates/feed/feed/user.rss.eex
+++ b/lib/pleroma/web/templates/feed/feed/user.rss.eex
@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <rss version="2.0">
   <channel>
-    <guid><%= user_feed_url(@conn, :feed, @user.nickname) <> ".rss" %></guid>
+    <guid><%= Routes.user_feed_url(@conn, :feed, @user.nickname) <> ".rss" %></guid>
     <title><%= @user.nickname <> "'s timeline" %></title>
     <updated><%= most_recent_update(@activities, @user) %></updated>
     <image><%= logo(@user) %></image>
-    <link><%= '#{user_feed_url(@conn, :feed, @user.nickname)}.rss' %></link>
+    <link><%= '#{Routes.user_feed_url(@conn, :feed, @user.nickname)}.rss' %></link>
 
     <%= render @view_module, "_author.rss", assigns %>
 
     <%= if last_activity(@activities) do %>
-      <link rel="next"><%= '#{user_feed_url(@conn, :feed, @user.nickname)}.rss?max_id=#{last_activity(@activities).id}' %></link>
+      <link rel="next"><%= '#{Routes.user_feed_url(@conn, :feed, @user.nickname)}.rss?max_id=#{last_activity(@activities).id}' %></link>
     <% end %>
 
     <%= for activity <- @activities do %>
diff --git a/lib/pleroma/web/templates/masto_fe/index.html.eex b/lib/pleroma/web/templates/masto_fe/index.html.eex
index c330960fa..6f2b98957 100644
--- a/lib/pleroma/web/templates/masto_fe/index.html.eex
+++ b/lib/pleroma/web/templates/masto_fe/index.html.eex
@@ -7,7 +7,7 @@
 <%= Config.get([:instance, :name]) %>
 </title>
 <link rel="icon" type="image/png" href="/favicon.png"/>
-<link rel="manifest" type="applicaton/manifest+json" href="<%= masto_fe_path(Pleroma.Web.Endpoint, :manifest) %>" />
+<link rel="manifest" type="applicaton/manifest+json" href="<%= Routes.masto_fe_path(Pleroma.Web.Endpoint, :manifest) %>" />
 
 <meta name="theme-color" content="<%= Config.get([:manifest, :theme_color]) %>" />
 
diff --git a/lib/pleroma/web/templates/o_auth/mfa/recovery.html.eex b/lib/pleroma/web/templates/o_auth/mfa/recovery.html.eex
index 5ab59b57b..b9daa8d8b 100644
--- a/lib/pleroma/web/templates/o_auth/mfa/recovery.html.eex
+++ b/lib/pleroma/web/templates/o_auth/mfa/recovery.html.eex
@@ -7,7 +7,7 @@
 
 <h2>Two-factor recovery</h2>
 
-<%= form_for @conn, mfa_verify_path(@conn, :verify), [as: "mfa"], fn f -> %>
+<%= form_for @conn, Routes.mfa_verify_path(@conn, :verify), [as: "mfa"], fn f -> %>
 <div class="input">
   <%= label f, :code, "Recovery code" %>
   <%= text_input f, :code, [autocomplete: false, autocorrect: "off", autocapitalize: "off", autofocus: true, spellcheck: false] %>
@@ -19,6 +19,6 @@
 
 <%= submit "Verify" %>
 <% end %>
-<a href="<%= mfa_path(@conn, :show, %{challenge_type: "totp", mfa_token: @mfa_token, state: @state, redirect_uri: @redirect_uri}) %>">
+<a href="<%= Routes.mfa_path(@conn, :show, %{challenge_type: "totp", mfa_token: @mfa_token, state: @state, redirect_uri: @redirect_uri}) %>">
   Enter a two-factor code
 </a>
diff --git a/lib/pleroma/web/templates/o_auth/mfa/totp.html.eex b/lib/pleroma/web/templates/o_auth/mfa/totp.html.eex
index af85777eb..29ea7c5fb 100644
--- a/lib/pleroma/web/templates/o_auth/mfa/totp.html.eex
+++ b/lib/pleroma/web/templates/o_auth/mfa/totp.html.eex
@@ -7,7 +7,7 @@
 
 <h2>Two-factor authentication</h2>
 
-<%= form_for @conn, mfa_verify_path(@conn, :verify), [as: "mfa"], fn f -> %>
+<%= form_for @conn, Routes.mfa_verify_path(@conn, :verify), [as: "mfa"], fn f -> %>
 <div class="input">
   <%= label f, :code, "Authentication code" %>
   <%= text_input f, :code, [autocomplete: false, autocorrect: "off", autocapitalize: "off", autofocus: true, pattern: "[0-9]*", spellcheck: false] %>
@@ -19,6 +19,6 @@
 
 <%= submit "Verify" %>
 <% end %>
-<a href="<%= mfa_path(@conn, :show, %{challenge_type: "recovery", mfa_token: @mfa_token, state: @state, redirect_uri: @redirect_uri}) %>">
+<a href="<%= Routes.mfa_path(@conn, :show, %{challenge_type: "recovery", mfa_token: @mfa_token, state: @state, redirect_uri: @redirect_uri}) %>">
   Enter a two-factor recovery code
 </a>
diff --git a/lib/pleroma/web/templates/o_auth/o_auth/consumer.html.eex b/lib/pleroma/web/templates/o_auth/o_auth/consumer.html.eex
index 4a0718851..dc4521a62 100644
--- a/lib/pleroma/web/templates/o_auth/o_auth/consumer.html.eex
+++ b/lib/pleroma/web/templates/o_auth/o_auth/consumer.html.eex
@@ -1,6 +1,6 @@
 <h2>Sign in with external provider</h2>
 
-<%= form_for @conn, o_auth_path(@conn, :prepare_request), [as: "authorization", method: "get"], fn f -> %>
+<%= form_for @conn, Routes.o_auth_path(@conn, :prepare_request), [as: "authorization", method: "get"], fn f -> %>
   <div style="display: none">
     <%= render @view_module, "_scopes.html", Map.merge(assigns, %{form: f}) %>
   </div>
diff --git a/lib/pleroma/web/templates/o_auth/o_auth/register.html.eex b/lib/pleroma/web/templates/o_auth/o_auth/register.html.eex
index facedc8db..99f900fb7 100644
--- a/lib/pleroma/web/templates/o_auth/o_auth/register.html.eex
+++ b/lib/pleroma/web/templates/o_auth/o_auth/register.html.eex
@@ -8,7 +8,7 @@
 <h2>Registration Details</h2>
 
 <p>If you'd like to register a new account, please provide the details below.</p>
-<%= form_for @conn, o_auth_path(@conn, :register), [as: "authorization"], fn f -> %>
+<%= form_for @conn, Routes.o_auth_path(@conn, :register), [as: "authorization"], fn f -> %>
 
 <div class="input">
   <%= label f, :nickname, "Nickname" %>
diff --git a/lib/pleroma/web/templates/o_auth/o_auth/show.html.eex b/lib/pleroma/web/templates/o_auth/o_auth/show.html.eex
index 1a85818ec..2846ec7e7 100644
--- a/lib/pleroma/web/templates/o_auth/o_auth/show.html.eex
+++ b/lib/pleroma/web/templates/o_auth/o_auth/show.html.eex
@@ -5,7 +5,7 @@
 <p class="alert alert-danger" role="alert"><%= get_flash(@conn, :error) %></p>
 <% end %>
 
-<%= form_for @conn, o_auth_path(@conn, :authorize), [as: "authorization"], fn f -> %>
+<%= form_for @conn, Routes.o_auth_path(@conn, :authorize), [as: "authorization"], fn f -> %>
 
 <%= if @user do %>
   <div class="account-header">
diff --git a/lib/pleroma/web/templates/twitter_api/password/reset.html.eex b/lib/pleroma/web/templates/twitter_api/password/reset.html.eex
index 7d3ef6b0d..fbcacdc14 100644
--- a/lib/pleroma/web/templates/twitter_api/password/reset.html.eex
+++ b/lib/pleroma/web/templates/twitter_api/password/reset.html.eex
@@ -1,5 +1,5 @@
 <h2>Password Reset for <%= @user.nickname %></h2>
-<%= form_for @conn, reset_password_path(@conn, :do_reset), [as: "data"], fn f -> %>
+<%= form_for @conn, Routes.reset_password_path(@conn, :do_reset), [as: "data"], fn f -> %>
   <div class="form-row">
     <%= label f, :password, "Password" %>
     <%= password_input f, :password %>
diff --git a/lib/pleroma/web/templates/twitter_api/password/reset_failed.html.eex b/lib/pleroma/web/templates/twitter_api/password/reset_failed.html.eex
index df037c01e..4ed4ac8bc 100644
--- a/lib/pleroma/web/templates/twitter_api/password/reset_failed.html.eex
+++ b/lib/pleroma/web/templates/twitter_api/password/reset_failed.html.eex
@@ -1,2 +1,2 @@
 <h2>Password reset failed</h2>
-<h3><a href="<%= Pleroma.Web.base_url() %>">Homepage</a></h3>
+<h3><a href="<%= Pleroma.Web.Endpoint.url() %>">Homepage</a></h3>
diff --git a/lib/pleroma/web/templates/twitter_api/password/reset_success.html.eex b/lib/pleroma/web/templates/twitter_api/password/reset_success.html.eex
index f30ba3274..086d4e08b 100644
--- a/lib/pleroma/web/templates/twitter_api/password/reset_success.html.eex
+++ b/lib/pleroma/web/templates/twitter_api/password/reset_success.html.eex
@@ -1,2 +1,2 @@
 <h2>Password changed!</h2>
-<h3><a href="<%= Pleroma.Web.base_url() %>">Homepage</a></h3>
+<h3><a href="<%= Pleroma.Web.Endpoint.url() %>">Homepage</a></h3>
diff --git a/lib/pleroma/web/templates/twitter_api/remote_follow/follow.html.eex b/lib/pleroma/web/templates/twitter_api/remote_follow/follow.html.eex
index 5ba192cd7..a7be53091 100644
--- a/lib/pleroma/web/templates/twitter_api/remote_follow/follow.html.eex
+++ b/lib/pleroma/web/templates/twitter_api/remote_follow/follow.html.eex
@@ -4,7 +4,7 @@
     <h2>Remote follow</h2>
     <img height="128" width="128" src="<%= avatar_url(@followee) %>">
     <p><%= @followee.nickname %></p>
-    <%= form_for @conn, remote_follow_path(@conn, :do_follow), [as: "user"], fn f -> %>
+    <%= form_for @conn, Routes.remote_follow_path(@conn, :do_follow), [as: "user"], fn f -> %>
     <%= hidden_input f, :id, value: @followee.id %>
     <%= submit "Authorize" %>
     <% end %>
diff --git a/lib/pleroma/web/templates/twitter_api/remote_follow/follow_login.html.eex b/lib/pleroma/web/templates/twitter_api/remote_follow/follow_login.html.eex
index df44988ee..a8026fa9d 100644
--- a/lib/pleroma/web/templates/twitter_api/remote_follow/follow_login.html.eex
+++ b/lib/pleroma/web/templates/twitter_api/remote_follow/follow_login.html.eex
@@ -4,7 +4,7 @@
 <h2>Log in to follow</h2>
 <p><%= @followee.nickname %></p>
 <img height="128" width="128" src="<%= avatar_url(@followee) %>">
-<%= form_for @conn, remote_follow_path(@conn, :do_follow), [as: "authorization"], fn f -> %>
+<%= form_for @conn, Routes.remote_follow_path(@conn, :do_follow), [as: "authorization"], fn f -> %>
 <%= text_input f, :name, placeholder: "Username", required: true %>
 <br>
 <%= password_input f, :password, placeholder: "Password", required: true %>
diff --git a/lib/pleroma/web/templates/twitter_api/remote_follow/follow_mfa.html.eex b/lib/pleroma/web/templates/twitter_api/remote_follow/follow_mfa.html.eex
index adc3a3e3d..a54ed83b5 100644
--- a/lib/pleroma/web/templates/twitter_api/remote_follow/follow_mfa.html.eex
+++ b/lib/pleroma/web/templates/twitter_api/remote_follow/follow_mfa.html.eex
@@ -4,7 +4,7 @@
 <h2>Two-factor authentication</h2>
 <p><%= @followee.nickname %></p>
 <img height="128" width="128" src="<%= avatar_url(@followee) %>">
-<%= form_for @conn, remote_follow_path(@conn, :do_follow), [as: "mfa"], fn f -> %>
+<%= form_for @conn, Routes.remote_follow_path(@conn, :do_follow), [as: "mfa"], fn f -> %>
 <%= text_input f, :code, placeholder: "Authentication code", required: true %>
 <br>
 <%= hidden_input f, :id, value: @followee.id %>
diff --git a/lib/pleroma/web/templates/twitter_api/util/subscribe.html.eex b/lib/pleroma/web/templates/twitter_api/util/subscribe.html.eex
index f60accebf..a6b313d8a 100644
--- a/lib/pleroma/web/templates/twitter_api/util/subscribe.html.eex
+++ b/lib/pleroma/web/templates/twitter_api/util/subscribe.html.eex
@@ -2,7 +2,7 @@
   <h2>Error: <%= @error %></h2>
 <% else %>
   <h2>Remotely follow <%= @nickname %></h2>
-  <%= form_for @conn, util_path(@conn, :remote_subscribe), [as: "user"], fn f -> %>
+  <%= form_for @conn, Routes.util_path(@conn, :remote_subscribe), [as: "user"], fn f -> %>
   <%= hidden_input f, :nickname, value: @nickname %>
   <%= text_input f, :profile, placeholder: "Your account ID, e.g. lain@quitter.se" %>
   <%= submit "Follow" %>
diff --git a/lib/pleroma/web/twitter_api/controller.ex b/lib/pleroma/web/twitter_api/controller.ex
index 077bfa70d..e32713311 100644
--- a/lib/pleroma/web/twitter_api/controller.ex
+++ b/lib/pleroma/web/twitter_api/controller.ex
@@ -5,7 +5,6 @@
 defmodule Pleroma.Web.TwitterAPI.Controller do
   use Pleroma.Web, :controller
 
-  alias Pleroma.Notification
   alias Pleroma.User
   alias Pleroma.Web.OAuth.Token
   alias Pleroma.Web.Plugs.EnsurePublicOrAuthenticatedPlug
@@ -15,11 +14,6 @@ defmodule Pleroma.Web.TwitterAPI.Controller do
   require Logger
 
   plug(
-    OAuthScopesPlug,
-    %{scopes: ["write:notifications"]} when action == :mark_notifications_as_read
-  )
-
-  plug(
     :skip_plug,
     [OAuthScopesPlug, EnsurePublicOrAuthenticatedPlug] when action == :confirm_email
   )
@@ -67,31 +61,4 @@ defmodule Pleroma.Web.TwitterAPI.Controller do
     |> put_resp_content_type("application/json")
     |> send_resp(status, json)
   end
-
-  def mark_notifications_as_read(
-        %{assigns: %{user: user}} = conn,
-        %{"latest_id" => latest_id} = params
-      ) do
-    Notification.set_read_up_to(user, latest_id)
-
-    notifications = Notification.for_user(user, params)
-
-    conn
-    # XXX: This is a hack because pleroma-fe still uses that API.
-    |> put_view(Pleroma.Web.MastodonAPI.NotificationView)
-    |> render("index.json", %{notifications: notifications, for: user})
-  end
-
-  def mark_notifications_as_read(%{assigns: %{user: _user}} = conn, _) do
-    bad_request_reply(conn, "You need to specify latest_id")
-  end
-
-  defp bad_request_reply(conn, error_message) do
-    json = error_json(conn, error_message)
-    json_reply(conn, 400, json)
-  end
-
-  defp error_json(conn, error_message) do
-    %{"error" => error_message, "request" => conn.request_path} |> Jason.encode!()
-  end
 end
diff --git a/lib/pleroma/web/twitter_api/controllers/remote_follow_controller.ex b/lib/pleroma/web/twitter_api/controllers/remote_follow_controller.ex
index 6ca02fbd7..9843cc362 100644
--- a/lib/pleroma/web/twitter_api/controllers/remote_follow_controller.ex
+++ b/lib/pleroma/web/twitter_api/controllers/remote_follow_controller.ex
@@ -38,7 +38,7 @@ defmodule Pleroma.Web.TwitterAPI.RemoteFollowController do
   defp follow_status(conn, _user, acct) do
     with {:ok, object} <- Fetcher.fetch_object_from_id(acct),
          %Activity{id: activity_id} <- Activity.get_create_by_object_ap_id(object.data["id"]) do
-      redirect(conn, to: o_status_path(conn, :notice, activity_id))
+      redirect(conn, to: Routes.o_status_path(conn, :notice, activity_id))
     else
       error ->
         handle_follow_error(conn, error)
diff --git a/lib/pleroma/web/twitter_api/controllers/util_controller.ex b/lib/pleroma/web/twitter_api/controllers/util_controller.ex
index 940a645bb..a2e69666e 100644
--- a/lib/pleroma/web/twitter_api/controllers/util_controller.ex
+++ b/lib/pleroma/web/twitter_api/controllers/util_controller.ex
@@ -10,12 +10,12 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
   alias Pleroma.Config
   alias Pleroma.Emoji
   alias Pleroma.Healthcheck
-  alias Pleroma.Notification
   alias Pleroma.User
   alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.Plugs.OAuthScopesPlug
   alias Pleroma.Web.WebFinger
 
+  plug(Pleroma.Web.ApiSpec.CastAndValidate when action != :remote_subscribe)
   plug(Pleroma.Web.Plugs.FederatingPlug when action == :remote_subscribe)
 
   plug(
@@ -30,7 +30,7 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
          ]
   )
 
-  plug(OAuthScopesPlug, %{scopes: ["write:notifications"]} when action == :notifications_read)
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.TwitterUtilOperation
 
   def remote_subscribe(conn, %{"nickname" => nick, "profile" => _}) do
     with %User{} = user <- User.get_cached_by_nickname(nick),
@@ -62,17 +62,6 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
     end
   end
 
-  def notifications_read(%{assigns: %{user: user}} = conn, %{"id" => notification_id}) do
-    with {:ok, _} <- Notification.read_one(user, notification_id) do
-      json(conn, %{status: "success"})
-    else
-      {:error, message} ->
-        conn
-        |> put_resp_content_type("application/json")
-        |> send_resp(403, Jason.encode!(%{"error" => message}))
-    end
-  end
-
   def frontend_configurations(conn, _params) do
     render(conn, "frontend_configurations.json")
   end
@@ -92,13 +81,17 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
     end
   end
 
-  def change_password(%{assigns: %{user: user}} = conn, params) do
-    case CommonAPI.Utils.confirm_current_password(user, params["password"]) do
+  def change_password(%{assigns: %{user: user}} = conn, %{
+        password: password,
+        new_password: new_password,
+        new_password_confirmation: new_password_confirmation
+      }) do
+    case CommonAPI.Utils.confirm_current_password(user, password) do
       {:ok, user} ->
         with {:ok, _user} <-
                User.reset_password(user, %{
-                 password: params["new_password"],
-                 password_confirmation: params["new_password_confirmation"]
+                 password: new_password,
+                 password_confirmation: new_password_confirmation
                }) do
           json(conn, %{status: "success"})
         else
@@ -115,10 +108,10 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
     end
   end
 
-  def change_email(%{assigns: %{user: user}} = conn, params) do
-    case CommonAPI.Utils.confirm_current_password(user, params["password"]) do
+  def change_email(%{assigns: %{user: user}} = conn, %{password: password, email: email}) do
+    case CommonAPI.Utils.confirm_current_password(user, password) do
       {:ok, user} ->
-        with {:ok, _user} <- User.change_email(user, params["email"]) do
+        with {:ok, _user} <- User.change_email(user, email) do
           json(conn, %{status: "success"})
         else
           {:error, changeset} ->
@@ -135,7 +128,7 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
   end
 
   def delete_account(%{assigns: %{user: user}} = conn, params) do
-    password = params["password"] || ""
+    password = params[:password] || ""
 
     case CommonAPI.Utils.confirm_current_password(user, password) do
       {:ok, user} ->
@@ -148,7 +141,7 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
   end
 
   def disable_account(%{assigns: %{user: user}} = conn, params) do
-    case CommonAPI.Utils.confirm_current_password(user, params["password"]) do
+    case CommonAPI.Utils.confirm_current_password(user, params[:password]) do
       {:ok, user} ->
         User.set_activation_async(user, false)
         json(conn, %{status: "success"})
diff --git a/lib/pleroma/web/twitter_api/views/util_view.ex b/lib/pleroma/web/twitter_api/views/util_view.ex
index 9b13c09b3..87cb79dd7 100644
--- a/lib/pleroma/web/twitter_api/views/util_view.ex
+++ b/lib/pleroma/web/twitter_api/views/util_view.ex
@@ -6,14 +6,14 @@ defmodule Pleroma.Web.TwitterAPI.UtilView do
   use Pleroma.Web, :view
   import Phoenix.HTML.Form
   alias Pleroma.Config
-  alias Pleroma.Web
+  alias Pleroma.Web.Endpoint
 
   def status_net_config(instance) do
     """
     <config>
     <site>
     <name>#{Keyword.get(instance, :name)}</name>
-    <site>#{Web.base_url()}</site>
+    <site>#{Endpoint.url()}</site>
     <textlimit>#{Keyword.get(instance, :limit)}</textlimit>
     <closed>#{!Keyword.get(instance, :registrations_open)}</closed>
     </site>
diff --git a/lib/pleroma/web/views/masto_fe_view.ex b/lib/pleroma/web/views/masto_fe_view.ex
index b9055cb7f..63a9c8179 100644
--- a/lib/pleroma/web/views/masto_fe_view.ex
+++ b/lib/pleroma/web/views/masto_fe_view.ex
@@ -78,8 +78,8 @@ defmodule Pleroma.Web.MastoFEView do
       theme_color: Config.get([:manifest, :theme_color]),
       background_color: Config.get([:manifest, :background_color]),
       display: "standalone",
-      scope: Pleroma.Web.base_url(),
-      start_url: masto_fe_path(Pleroma.Web.Endpoint, :index, ["getting-started"]),
+      scope: Pleroma.Web.Endpoint.url(),
+      start_url: Routes.masto_fe_path(Pleroma.Web.Endpoint, :index, ["getting-started"]),
       categories: [
         "social"
       ],
diff --git a/lib/pleroma/web/web_finger.ex b/lib/pleroma/web/web_finger.ex
index 15002b29f..938fc09e3 100644
--- a/lib/pleroma/web/web_finger.ex
+++ b/lib/pleroma/web/web_finger.ex
@@ -5,7 +5,7 @@
 defmodule Pleroma.Web.WebFinger do
   alias Pleroma.HTTP
   alias Pleroma.User
-  alias Pleroma.Web
+  alias Pleroma.Web.Endpoint
   alias Pleroma.Web.Federator.Publisher
   alias Pleroma.Web.XML
   alias Pleroma.XmlBuilder
@@ -13,7 +13,7 @@ defmodule Pleroma.Web.WebFinger do
   require Logger
 
   def host_meta do
-    base_url = Web.base_url()
+    base_url = Endpoint.url()
 
     {
       :XRD,
@@ -94,52 +94,56 @@ defmodule Pleroma.Web.WebFinger do
     |> XmlBuilder.to_doc()
   end
 
-  defp webfinger_from_xml(doc) do
-    subject = XML.string_from_xpath("//Subject", doc)
+  defp webfinger_from_xml(body) do
+    with {:ok, doc} <- XML.parse_document(body) do
+      subject = XML.string_from_xpath("//Subject", doc)
 
-    subscribe_address =
-      ~s{//Link[@rel="http://ostatus.org/schema/1.0/subscribe"]/@template}
-      |> XML.string_from_xpath(doc)
+      subscribe_address =
+        ~s{//Link[@rel="http://ostatus.org/schema/1.0/subscribe"]/@template}
+        |> XML.string_from_xpath(doc)
 
-    ap_id =
-      ~s{//Link[@rel="self" and @type="application/activity+json"]/@href}
-      |> XML.string_from_xpath(doc)
+      ap_id =
+        ~s{//Link[@rel="self" and @type="application/activity+json"]/@href}
+        |> XML.string_from_xpath(doc)
 
-    data = %{
-      "subject" => subject,
-      "subscribe_address" => subscribe_address,
-      "ap_id" => ap_id
-    }
+      data = %{
+        "subject" => subject,
+        "subscribe_address" => subscribe_address,
+        "ap_id" => ap_id
+      }
 
-    {:ok, data}
+      {:ok, data}
+    end
   end
 
-  defp webfinger_from_json(doc) do
-    data =
-      Enum.reduce(doc["links"], %{"subject" => doc["subject"]}, fn link, data ->
-        case {link["type"], link["rel"]} do
-          {"application/activity+json", "self"} ->
-            Map.put(data, "ap_id", link["href"])
+  defp webfinger_from_json(body) do
+    with {:ok, doc} <- Jason.decode(body) do
+      data =
+        Enum.reduce(doc["links"], %{"subject" => doc["subject"]}, fn link, data ->
+          case {link["type"], link["rel"]} do
+            {"application/activity+json", "self"} ->
+              Map.put(data, "ap_id", link["href"])
 
-          {"application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"", "self"} ->
-            Map.put(data, "ap_id", link["href"])
+            {"application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"", "self"} ->
+              Map.put(data, "ap_id", link["href"])
 
-          {nil, "http://ostatus.org/schema/1.0/subscribe"} ->
-            Map.put(data, "subscribe_address", link["template"])
+            {nil, "http://ostatus.org/schema/1.0/subscribe"} ->
+              Map.put(data, "subscribe_address", link["template"])
 
-          _ ->
-            Logger.debug("Unhandled type: #{inspect(link["type"])}")
-            data
-        end
-      end)
+            _ ->
+              Logger.debug("Unhandled type: #{inspect(link["type"])}")
+              data
+          end
+        end)
 
-    {:ok, data}
+      {:ok, data}
+    end
   end
 
   def get_template_from_xml(body) do
     xpath = "//Link[@rel='lrdd']/@template"
 
-    with doc when doc != :error <- XML.parse_document(body),
+    with {:ok, doc} <- XML.parse_document(body),
          template when template != nil <- XML.string_from_xpath(xpath, doc) do
       {:ok, template}
     end
@@ -192,15 +196,23 @@ defmodule Pleroma.Web.WebFinger do
              address,
              [{"accept", "application/xrd+xml,application/jrd+json"}]
            ),
-         {:ok, %{status: status, body: body}} when status in 200..299 <- response do
-      doc = XML.parse_document(body)
-
-      if doc != :error do
-        webfinger_from_xml(doc)
-      else
-        with {:ok, doc} <- Jason.decode(body) do
-          webfinger_from_json(doc)
-        end
+         {:ok, %{status: status, body: body, headers: headers}} when status in 200..299 <-
+           response do
+      case List.keyfind(headers, "content-type", 0) do
+        {_, content_type} ->
+          case Plug.Conn.Utils.media_type(content_type) do
+            {:ok, "application", subtype, _} when subtype in ~w(xrd+xml xml) ->
+              webfinger_from_xml(body)
+
+            {:ok, "application", subtype, _} when subtype in ~w(jrd+json json) ->
+              webfinger_from_json(body)
+
+            _ ->
+              {:error, {:content_type, content_type}}
+          end
+
+        _ ->
+          {:error, {:content_type, nil}}
       end
     else
       e ->
diff --git a/lib/pleroma/web/xml.ex b/lib/pleroma/web/xml.ex
index 2b34611ac..0ab6e9d32 100644
--- a/lib/pleroma/web/xml.ex
+++ b/lib/pleroma/web/xml.ex
@@ -31,7 +31,7 @@ defmodule Pleroma.Web.XML do
         |> :binary.bin_to_list()
         |> :xmerl_scan.string(quiet: true)
 
-      doc
+      {:ok, doc}
     rescue
       _e ->
         Logger.debug("Couldn't parse XML: #{inspect(text)}")