Display like activities.

lib/pleroma/web/twitter_api/representers/activity_representer.ex

@@ -4,6 +4,25 @@ defmodule Pleroma.Web.TwitterAPI.Representers.ActivityRepresenter do
   alias Pleroma.Activity
 
 
+  def to_map(%Activity{data: %{"type" => "Like"}} = activity, %{user: user, liked_activity: liked_activity} = opts) do
+    created_at = get_in(activity.data, ["published"])
+    |> date_to_asctime
+
+    text = "#{user.nickname} favorited a status."
+
+    %{
+      "id" => activity.id,
+      "user" => UserRepresenter.to_map(user, opts),
+      "statusnet_html" => text,  # TODO: add summary
+      "text" => text,
+      "is_local" => true,
+      "is_post_verb" => false,
+      "uri" => "tag:#{activity.data["id"]}:objectType=Favourite",
+      "created_at" => created_at,
+      "in_reply_to_status_id" => liked_activity.id,
+    }
+  end
+
   def to_map(%Activity{data: %{"type" => "Follow"}} = activity, %{user: user} = opts) do
     created_at = get_in(activity.data, ["published"])
     |> date_to_asctime

lib/pleroma/web/twitter_api/twitter_api.ex

@@ -192,6 +192,15 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
     end)
   end
 
+  # For likes, fetch the liked activity, too.
+  defp activity_to_status(%Activity{data: %{"type" => "Like"}} = activity, opts) do
+    actor = get_in(activity.data, ["actor"])
+    user = Repo.get_by!(User, ap_id: actor)
+    [liked_activity] = Activity.all_by_object_ap_id(activity.data["object"])
+
+    ActivityRepresenter.to_map(activity, Map.merge(opts, %{user: user, liked_activity: liked_activity}))
+  end
+
   defp activity_to_status(activity, opts) do
     actor = get_in(activity.data, ["actor"])
     user = Repo.get_by!(User, ap_id: actor)

test/web/twitter_api/representers/activity_representer_test.exs

@@ -2,7 +2,21 @@ defmodule Pleroma.Web.TwitterAPI.Representers.ActivityRepresenterTest do
   use Pleroma.DataCase
   alias Pleroma.{User, Activity, Object}
   alias Pleroma.Web.TwitterAPI.Representers.{UserRepresenter, ActivityRepresenter, ObjectRepresenter}
+  alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Builders.UserBuilder
+  import Pleroma.Factory
+
+  test "a like activity" do
+    user = insert(:user)
+    note_activity = insert(:note_activity)
+    object = Object.get_by_ap_id(note_activity.data["object"]["id"])
+
+    {:ok, like_activity, object} = ActivityPub.like(user, object)
+    status = ActivityRepresenter.to_map(like_activity, %{user: user, liked_activity: note_activity})
+
+    assert status["id"] == like_activity.id
+    assert status["in_reply_to_status_id"] == note_activity.id
+  end
 
   test "an activity" do
     {:ok, user} = UserBuilder.insert