Show edited_at in MastodonAPI/show

lib/pleroma/web/api_spec/schemas/status.ex

@@ -73,6 +73,12 @@ defmodule Pleroma.Web.ApiSpec.Schemas.Status do
         format: "date-time",
         description: "The date when this status was created"
       },
+      edited_at: %Schema{
+        type: :string,
+        format: "date-time",
+        nullable: true,
+        description: "The date when this status was last edited"
+      },
       emojis: %Schema{
         type: :array,
         items: Emoji,

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

@@ -258,6 +258,16 @@ def render("show.json", %{activity: %{data: %{"object" => _object}} = activity}
 
     created_at = Utils.to_masto_date(object.data["published"])
 
+    edited_at =
+      with %{"updated" => updated} <- object.data,
+           date <- Utils.to_masto_date(updated),
+           true <- date != "" do
+        date
+      else
+        _ ->
+          nil
+      end
+
     reply_to = get_reply_to(activity, opts)
 
     reply_to_user = reply_to && CommonAPI.get_user(reply_to.data["actor"])
@@ -346,6 +356,7 @@ def render("show.json", %{activity: %{data: %{"object" => _object}} = activity}
       content: content_html,
       text: opts[:with_source] && object.data["source"],
       created_at: created_at,
+      edited_at: edited_at,
       reblogs_count: announcement_count,
       replies_count: object.data["repliesCount"] || 0,
       favourites_count: like_count,

test/pleroma/web/mastodon_api/views/status_view_test.exs

@@ -246,6 +246,7 @@ test "a note activity" do
       content: HTML.filter_tags(object_data["content"]),
       text: nil,
       created_at: created_at,
+      edited_at: nil,
       reblogs_count: 0,
       replies_count: 0,
       favourites_count: 0,
@@ -708,4 +709,19 @@ test "has a field for parent visibility" do
     status = StatusView.render("show.json", activity: visible, for: poster)
     assert status.pleroma.parent_visible
   end
+
+  test "it shows edited_at" do
+    poster = insert(:user)
+
+    {:ok, post} = CommonAPI.post(poster, %{status: "hey"})
+
+    status = StatusView.render("show.json", activity: post)
+    refute status.edited_at
+
+    {:ok, _} = CommonAPI.update(poster, post, %{status: "mew mew"})
+    edited = Pleroma.Activity.normalize(post)
+
+    status = StatusView.render("show.json", activity: edited)
+    assert status.edited_at
+  end
 end