3 files changed, 178 insertions, 1 deletions
diff --git a/lib/pleroma/docs/translator.ex b/lib/pleroma/docs/translator.ex
new file mode 100644
index 000000000..13e33c87e
--- /dev/null
+++ b/lib/pleroma/docs/translator.ex
@@ -0,0 +1,10 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Docs.Translator do
+  require Pleroma.Docs.Translator.Compiler
+  require Pleroma.Web.Gettext
+
+  @before_compile Pleroma.Docs.Translator.Compiler
+end
diff --git a/lib/pleroma/docs/translator/compiler.ex b/lib/pleroma/docs/translator/compiler.ex
new file mode 100644
index 000000000..5d27d9fa2
--- /dev/null
+++ b/lib/pleroma/docs/translator/compiler.ex
@@ -0,0 +1,119 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Docs.Translator.Compiler do
+  @external_resource "config/description.exs"
+  @raw_config Pleroma.Config.Loader.read("config/description.exs")
+  @raw_descriptions @raw_config[:pleroma][:config_description]
+
+  defmacro __before_compile__(_env) do
+    strings =
+      __MODULE__.descriptions()
+      |> __MODULE__.extract_strings()
+
+    quote do
+      def placeholder do
+        unquote do
+          Enum.map(
+            strings,
+            fn {path, type, string} ->
+              ctxt = msgctxt_for(path, type)
+
+              quote do
+                Pleroma.Web.Gettext.dpgettext_noop(
+                  "config_descriptions",
+                  unquote(ctxt),
+                  unquote(string)
+                )
+              end
+            end
+          )
+        end
+      end
+    end
+  end
+
+  def descriptions do
+    Pleroma.Web.ActivityPub.MRF.config_descriptions()
+    |> Enum.reduce(@raw_descriptions, fn description, acc -> [description | acc] end)
+    |> Pleroma.Docs.Generator.convert_to_strings()
+  end
+
+  def extract_strings(descriptions) do
+    descriptions
+    |> Enum.reduce(%{strings: [], path: []}, &process_item/2)
+    |> Map.get(:strings)
+  end
+
+  defp process_item(entity, acc) do
+    current_level =
+      acc
+      |> process_desc(entity)
+      |> process_label(entity)
+
+    process_children(entity, current_level)
+  end
+
+  defp process_desc(acc, %{description: desc} = item) do
+    %{
+      strings: [{acc.path ++ [key_for(item)], "description", desc} | acc.strings],
+      path: acc.path
+    }
+  end
+
+  defp process_desc(acc, _) do
+    acc
+  end
+
+  defp process_label(acc, %{label: label} = item) do
+    %{
+      strings: [{acc.path ++ [key_for(item)], "label", label} | acc.strings],
+      path: acc.path
+    }
+  end
+
+  defp process_label(acc, _) do
+    acc
+  end
+
+  defp process_children(%{children: children} = item, acc) do
+    current_level = Map.put(acc, :path, acc.path ++ [key_for(item)])
+
+    children
+    |> Enum.reduce(current_level, &process_item/2)
+    |> Map.put(:path, acc.path)
+  end
+
+  defp process_children(_, acc) do
+    acc
+  end
+
+  def msgctxt_for(path, type) do
+    "config #{type} at #{Enum.join(path, " > ")}"
+  end
+
+  defp convert_group({_, group}) do
+    group
+  end
+
+  defp convert_group(group) do
+    group
+  end
+
+  def key_for(%{group: group, key: key}) do
+    "#{convert_group(group)}-#{key}"
+  end
+
+  def key_for(%{group: group}) do
+    convert_group(group)
+  end
+
+  def key_for(%{key: key}) do
+    key
+  end
+
+  def key_for(_) do
+    nil
+  end
+end
diff --git a/lib/pleroma/web/admin_api/controllers/config_controller.ex b/lib/pleroma/web/admin_api/controllers/config_controller.ex
index 55ab6d063..a03318c0e 100644
--- a/lib/pleroma/web/admin_api/controllers/config_controller.ex
+++ b/lib/pleroma/web/admin_api/controllers/config_controller.ex
@@ -22,10 +22,58 @@ defmodule Pleroma.Web.AdminAPI.ConfigController do
 
   defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.Admin.ConfigOperation
 
+  defp translate_descriptions(descriptions, path \\ []) do
+    Enum.map(descriptions, fn desc -> translate_item(desc, path) end)
+  end
+
+  defp translate_string(str, path, type) do
+    Gettext.dpgettext(
+      Pleroma.Web.Gettext,
+      "config_descriptions",
+      Pleroma.Docs.Translator.Compiler.msgctxt_for(path, type),
+      str
+    )
+  end
+
+  defp maybe_put_translated(item, key, path) do
+    if item[key] do
+      Map.put(
+        item,
+        key,
+        translate_string(
+          item[key],
+          path ++ [Pleroma.Docs.Translator.Compiler.key_for(item)],
+          to_string(key)
+        )
+      )
+    else
+      item
+    end
+  end
+
+  defp translate_item(item, path) do
+    item
+    |> maybe_put_translated(:label, path)
+    |> maybe_put_translated(:description, path)
+    |> translate_children(path)
+  end
+
+  defp translate_children(%{children: children} = item, path) when is_list(children) do
+    item
+    |> Map.put(
+      :children,
+      translate_descriptions(children, path ++ [Pleroma.Docs.Translator.Compiler.key_for(item)])
+    )
+  end
+
+  defp translate_children(item, _path) do
+    item
+  end
+
   def descriptions(conn, _params) do
     descriptions = Enum.filter(Pleroma.Docs.JSON.compiled_descriptions(), &whitelisted_config?/1)
 
-    json(conn, descriptions)
+    json(conn, translate_descriptions(descriptions))
   end
 
   def show(conn, %{only_db: true}) do