Favorite changes.

- Add 'likes' to activity, collection of ids of people who liked it.
- show if you favorited something or not.
- Don't allow double favorites
- Address favorites to the followers of the liked activity's author.

test/web/activity_pub/activity_pub_test.exs

@@ -1,7 +1,7 @@
 defmodule Pleroma.Web.ActivityPub.ActivityPubTest do
   use Pleroma.DataCase
   alias Pleroma.Web.ActivityPub.ActivityPub
-  alias Pleroma.{Activity, Object}
+  alias Pleroma.{Activity, Object, User}
   alias Pleroma.Builders.ActivityBuilder
 
   import Pleroma.Factory
@@ -124,7 +124,15 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubTest do
       assert like_activity.data["actor"] == user.ap_id
       assert like_activity.data["type"] == "Like"
       assert like_activity.data["object"] == object.data["id"]
+      assert like_activity.data["to"] == [User.ap_followers(user)]
       assert object.data["like_count"] == 1
+      assert object.data["likes"] == [user.ap_id]
+
+      # Just return the original activity if the user already liked it.
+      {:ok, same_like_activity, object} = ActivityPub.like(user, object)
+
+      assert like_activity == same_like_activity
+      assert object.data["likes"] == [user.ap_id]
 
       [note_activity] = Activity.all_by_object_ap_id(object.data["id"])
       assert note_activity.data["object"]["like_count"] == 1

test/web/twitter_api/representers/activity_representer_test.exs

@@ -11,11 +11,16 @@ defmodule Pleroma.Web.TwitterAPI.Representers.ActivityRepresenterTest do
     note_activity = insert(:note_activity)
     object = Object.get_by_ap_id(note_activity.data["object"]["id"])
 
-    {:ok, like_activity, object} = ActivityPub.like(user, object)
+    {: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
+
+    note_activity = Activity.get_by_ap_id(note_activity.data["id"])
+    activity_actor = Repo.get_by(User, ap_id: note_activity.data["actor"])
+    liked_status = ActivityRepresenter.to_map(note_activity, %{user: activity_actor, for: user})
+    assert liked_status["favorited"] == true
   end
 
   test "an activity" do
@@ -84,7 +89,8 @@ defmodule Pleroma.Web.TwitterAPI.Representers.ActivityRepresenterTest do
       "attentions" => [
         UserRepresenter.to_map(mentioned_user, %{for: follower})
       ],
-      "fave_num" => 5
+      "fave_num" => 5,
+      "favorited" => false
     }
 
     assert ActivityRepresenter.to_map(activity, %{user: user, for: follower, mentioned: [mentioned_user]}) == expected_status