3 files changed, 20 insertions, 7 deletions
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index 1ac67b618..5c436941a 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -325,12 +325,14 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   def react_with_emoji(user, object, emoji, options \\ []) do
     with local <- Keyword.get(options, :local, true),
          activity_id <- Keyword.get(options, :activity_id, nil),
-         Pleroma.Emoji.is_unicode_emoji?(emoji),
+         true <- Pleroma.Emoji.is_unicode_emoji?(emoji),
          reaction_data <- make_emoji_reaction_data(user, object, emoji, activity_id),
          {:ok, activity} <- insert(reaction_data, local),
          {:ok, object} <- add_emoji_reaction_to_object(activity, object),
          :ok <- maybe_federate(activity) do
       {:ok, activity, object}
+    else
+      e -> {:error, e}
     end
   end
 
@@ -345,6 +347,8 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
          {:ok, object} <- remove_emoji_reaction_from_object(reaction_activity, object),
          :ok <- maybe_federate(activity) do
       {:ok, activity, object}
+    else
+      e -> {:error, e}
     end
   end
 
diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index 2b8bfc3bd..a72d8430f 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -580,7 +580,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     "star" => "⭐"
   }
 
-  @doc "Rewrite misskey likes into EmojiReactions"
+  @doc "Rewrite misskey likes into EmojiReacts"
   def handle_incoming(
         %{
           "type" => "Like",
@@ -589,7 +589,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
         options
       ) do
     data
-    |> Map.put("type", "EmojiReaction")
+    |> Map.put("type", "EmojiReact")
     |> Map.put("content", @misskey_reactions[reaction] || reaction)
     |> handle_incoming(options)
   end
@@ -610,7 +610,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def handle_incoming(
         %{
-          "type" => "EmojiReaction",
+          "type" => "EmojiReact",
           "object" => object_id,
           "actor" => _actor,
           "id" => id,
@@ -751,7 +751,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   def handle_incoming(
         %{
           "type" => "Undo",
-          "object" => %{"type" => "EmojiReaction", "id" => reaction_activity_id},
+          "object" => %{"type" => "EmojiReact", "id" => reaction_activity_id},
           "actor" => _actor,
           "id" => id
         } = data,
diff --git a/lib/pleroma/web/activity_pub/utils.ex b/lib/pleroma/web/activity_pub/utils.ex
index 4f7fdaf38..10ce5eee8 100644
--- a/lib/pleroma/web/activity_pub/utils.ex
+++ b/lib/pleroma/web/activity_pub/utils.ex
@@ -308,7 +308,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
 
   def make_emoji_reaction_data(user, object, emoji, activity_id) do
     make_like_data(user, object, activity_id)
-    |> Map.put("type", "EmojiReaction")
+    |> Map.put("type", "EmojiReact")
     |> Map.put("content", emoji)
   end
 
@@ -490,10 +490,19 @@ defmodule Pleroma.Web.ActivityPub.Utils do
     |> Repo.one()
   end
 
+  def fetch_latest_undo(%User{ap_id: ap_id}) do
+    "Undo"
+    |> Activity.Queries.by_type()
+    |> where(actor: ^ap_id)
+    |> order_by([activity], fragment("? desc nulls last", activity.id))
+    |> limit(1)
+    |> Repo.one()
+  end
+
   def get_latest_reaction(internal_activity_id, %{ap_id: ap_id}, emoji) do
     %{data: %{"object" => object_ap_id}} = Activity.get_by_id(internal_activity_id)
 
-    "EmojiReaction"
+    "EmojiReact"
     |> Activity.Queries.by_type()
     |> where(actor: ^ap_id)
     |> where([activity], fragment("?->>'content' = ?", activity.data, ^emoji))