Add language support on /api/v1/statuses

lib/pleroma/iso639.ex

@@ -0,0 +1,11 @@
+defmodule Pleroma.ISO639 do
+  @file "priv/language-codes.json"
+  @data File.read!(@file)
+        |> Jason.decode!()
+
+  for %{"alpha2" => alpha2} <- @data do
+    def valid_alpha2?(unquote(alpha2)), do: true
+  end
+
+  def valid_alpha2?(_alpha2), do: false
+end

lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex

@@ -30,6 +30,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNotePageValidator do
 
     field(:replies, {:array, ObjectValidators.ObjectID}, default: [])
     field(:source, :map)
+    field(:content_map, :map)
   end
 
   def cast_and_apply(data) do
@@ -146,6 +147,20 @@ defp fix_source(%{"source" => source} = object) when is_binary(source) do
 
   defp fix_source(object), do: object
 
+  defp fix_content_map_languages(%{"contentMap" => content_map} = object)
+       when is_map(content_map) do
+    # Only allow valid languages
+    content_map =
+      content_map
+      |> Enum.reject(fn {lang, content} ->
+        !Pleroma.ISO639.valid_alpha2?(lang)
+      end)
+
+    Map.put(object, "contentMap", content_map)
+  end
+
+  defp fix_content_map_languages(object), do: object
+
   defp fix(data) do
     data
     |> CommonFixes.fix_actor()
@@ -158,6 +173,7 @@ defp fix(data) do
     |> Transmogrifier.fix_attachments()
     |> Transmogrifier.fix_emoji()
     |> Transmogrifier.fix_content_map()
+    |> fix_content_map_languages()
   end
 
   def changeset(struct, data) do

lib/pleroma/web/common_api/activity_draft.ex

@@ -22,6 +22,8 @@ defmodule Pleroma.Web.CommonAPI.ActivityDraft do
             attachments: [],
             in_reply_to: nil,
             in_reply_to_conversation: nil,
+            language: nil,
+            content_map: %{},
             quote_id: nil,
             quote: nil,
             visibility: nil,
@@ -58,6 +60,7 @@ def create(user, params) do
     |> with_valid(&visibility/1)
     |> with_valid(&quote_id/1)
     |> content()
+    |> with_valid(&language/1)
     |> with_valid(&to_and_cc/1)
     |> with_valid(&context/1)
     |> sensitive()
@@ -133,6 +136,17 @@ defp quote_id(%{params: %{quote_id: %Activity{} = quote}} = draft) do
 
   defp quote_id(draft), do: draft
 
+  defp language(%{params: %{language: language}, content_html: content} = draft)
+       when is_binary(language) do
+    if Pleroma.ISO639.valid_alpha2?(language) do
+      %__MODULE__{draft | content_map: %{language => content}}
+    else
+      add_error(draft, dgettext("errors", "Invalid language"))
+    end
+  end
+
+  defp language(draft), do: draft
+
   defp visibility(%{params: params} = draft) do
     case CommonAPI.get_visibility(params, draft.in_reply_to, draft.in_reply_to_conversation) do
       {visibility, "direct"} when visibility != "direct" ->
@@ -224,6 +238,7 @@ defp object(draft) do
         "mediaType" => Utils.get_content_type(draft.params[:content_type])
       })
       |> Map.put("generator", draft.params[:generator])
+      |> Map.put("contentMap", draft.content_map)
 
     %__MODULE__{draft | object: object}
   end

lib/pleroma/web/mastodon_api/views/status_view.ex

@@ -169,6 +169,7 @@ def render(
       |> Enum.map(fn user -> AccountView.render("mention.json", %{user: user}) end)
 
     {pinned?, pinned_at} = pin_data(object, user)
+    lang = language(object)
 
     %{
       id: to_string(activity.id),
@@ -199,7 +200,7 @@ def render(
       mentions: mentions,
       tags: reblogged[:tags] || [],
       application: build_application(object.data["generator"]),
-      language: nil,
+      language: lang,
       emojis: [],
       pleroma: %{
         local: activity.local,
@@ -357,6 +358,7 @@ def render("show.json", %{activity: %{data: %{"object" => _object}} = activity}
       {pinned?, pinned_at} = pin_data(object, user)
 
       quote = Activity.get_quoted_activity_from_object(object)
+      lang = language(object)
 
       %{
         id: to_string(activity.id),
@@ -391,7 +393,7 @@ def render("show.json", %{activity: %{data: %{"object" => _object}} = activity}
         mentions: mentions,
         tags: build_tags(tags),
         application: build_application(object.data["generator"]),
-        language: nil,
+        language: lang,
         emojis: build_emojis(object.data["emoji"]),
         quote_id: if(quote, do: quote.id, else: nil),
         quote: maybe_render_quote(quote, opts),
@@ -784,4 +786,12 @@ defp get_source_content_type(%{"mediaType" => type} = _source) do
   defp get_source_content_type(_source) do
     Utils.get_content_type(nil)
   end
+
+  defp language(%Object{data: %{"contentMap" => contentMap}}) when is_map(contentMap) do
+    contentMap
+    |> Map.keys()
+    |> Enum.at(0)
+  end
+
+  defp language(_), do: nil
 end

test/pleroma/web/mastodon_api/controllers/status_controller_test.exs

@@ -67,11 +67,17 @@ test "posting a status", %{conn: conn} do
         |> post("/api/v1/statuses", %{
           "status" => "cofe",
           "spoiler_text" => "2hu",
-          "sensitive" => "0"
+          "sensitive" => "0",
+          "language" => "ja"
         })
 
-      assert %{"content" => "cofe", "id" => id, "spoiler_text" => "2hu", "sensitive" => false} =
-               json_response_and_validate_schema(conn_one, 200)
+      assert %{
+               "content" => "cofe",
+               "id" => id,
+               "spoiler_text" => "2hu",
+               "sensitive" => false,
+               "language" => "ja"
+             } = json_response_and_validate_schema(conn_one, 200)
 
       assert Activity.get_by_id(id)