Undoing: Move undoing likes to the pipeline everywhere.

test/notification_test.exs

@@ -724,7 +724,7 @@ defmodule Pleroma.NotificationTest do
 
       assert length(Notification.for_user(user)) == 1
 
-      {:ok, _, _, _} = CommonAPI.unfavorite(activity.id, other_user)
+      {:ok, _} = CommonAPI.unfavorite(activity.id, other_user)
 
       assert Enum.empty?(Notification.for_user(user))
     end

test/web/activity_pub/activity_pub_test.exs

@@ -995,66 +995,6 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubTest do
     end
   end
 
-  describe "unliking" do
-    test_with_mock "sends an activity to federation", Federator, [:passthrough], [] do
-      Config.put([:instance, :federating], true)
-
-      note_activity = insert(:note_activity)
-      object = Object.normalize(note_activity)
-      user = insert(:user)
-
-      {:ok, object} = ActivityPub.unlike(user, object)
-      refute called(Federator.publish())
-
-      {:ok, _like_activity} = CommonAPI.favorite(user, note_activity.id)
-      object = Object.get_by_id(object.id)
-      assert object.data["like_count"] == 1
-
-      {:ok, unlike_activity, _, object} = ActivityPub.unlike(user, object)
-      assert object.data["like_count"] == 0
-
-      assert called(Federator.publish(unlike_activity))
-    end
-
-    test "reverts unliking on error" do
-      note_activity = insert(:note_activity)
-      user = insert(:user)
-
-      {:ok, like_activity} = CommonAPI.favorite(user, note_activity.id)
-      object = Object.normalize(note_activity)
-      assert object.data["like_count"] == 1
-
-      with_mock(Utils, [:passthrough], maybe_federate: fn _ -> {:error, :reverted} end) do
-        assert {:error, :reverted} = ActivityPub.unlike(user, object)
-      end
-
-      assert Object.get_by_ap_id(object.data["id"]) == object
-      assert object.data["like_count"] == 1
-      assert Activity.get_by_id(like_activity.id)
-    end
-
-    test "unliking a previously liked object" do
-      note_activity = insert(:note_activity)
-      object = Object.normalize(note_activity)
-      user = insert(:user)
-
-      # Unliking something that hasn't been liked does nothing
-      {:ok, object} = ActivityPub.unlike(user, object)
-      assert object.data["like_count"] == 0
-
-      {:ok, like_activity} = CommonAPI.favorite(user, note_activity.id)
-
-      object = Object.get_by_id(object.id)
-      assert object.data["like_count"] == 1
-
-      {:ok, unlike_activity, _, object} = ActivityPub.unlike(user, object)
-      assert object.data["like_count"] == 0
-
-      assert Activity.get_by_id(like_activity.id) == nil
-      assert note_activity.actor in unlike_activity.recipients
-    end
-  end
-
   describe "announcing an object" do
     test "adds an announce activity to the db" do
       note_activity = insert(:note_activity)

test/web/activity_pub/side_effects_test.exs

@@ -5,6 +5,7 @@
 defmodule Pleroma.Web.ActivityPub.SideEffectsTest do
   use Pleroma.DataCase
 
+  alias Pleroma.Activity
   alias Pleroma.Notification
   alias Pleroma.Object
   alias Pleroma.Repo
@@ -15,6 +16,34 @@ defmodule Pleroma.Web.ActivityPub.SideEffectsTest do
 
   import Pleroma.Factory
 
+  describe "Undo objects" do
+    setup do
+      poster = insert(:user)
+      user = insert(:user)
+      {:ok, post} = CommonAPI.post(poster, %{"status" => "hey"})
+      {:ok, like} = CommonAPI.favorite(user, post.id)
+
+      {:ok, undo_data, _meta} = Builder.undo(user, like)
+      {:ok, like_undo, _meta} = ActivityPub.persist(undo_data, local: true)
+
+      %{like_undo: like_undo, post: post, like: like}
+    end
+
+    test "a like undo removes the like from the object", %{like_undo: like_undo, post: post} do
+      {:ok, _like_undo, _} = SideEffects.handle(like_undo)
+
+      object = Object.get_by_ap_id(post.data["object"])
+
+      assert object.data["like_count"] == 0
+      assert object.data["likes"] == []
+    end
+
+    test "deletes the original like", %{like_undo: like_undo, like: like} do
+      {:ok, _like_undo, _} = SideEffects.handle(like_undo)
+      refute Activity.get_by_id(like.id)
+    end
+  end
+
   describe "like objects" do
     setup do
       poster = insert(:user)

test/web/activity_pub/transmogrifier/undo_handling_test.exs

@@ -6,6 +6,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.UndoHandlingTest do
   use Pleroma.DataCase
 
   alias Pleroma.Activity
+  alias Pleroma.Object
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.Transmogrifier
   alias Pleroma.Web.CommonAPI
@@ -67,7 +68,11 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.UndoHandlingTest do
     assert data["actor"] == "http://mastodon.example.org/users/admin"
     assert data["type"] == "Undo"
     assert data["id"] == "http://mastodon.example.org/users/admin#likes/2/undo"
-    assert data["object"]["id"] == "http://mastodon.example.org/users/admin#likes/2"
+    assert data["object"] == "http://mastodon.example.org/users/admin#likes/2"
+
+    note = Object.get_by_ap_id(like_data["object"])
+    assert note.data["like_count"] == 0
+    assert note.data["likes"] == []
   end
 
   test "it works for incoming unlikes with an existing like activity and a compact object" do
@@ -94,7 +99,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.UndoHandlingTest do
     assert data["actor"] == "http://mastodon.example.org/users/admin"
     assert data["type"] == "Undo"
     assert data["id"] == "http://mastodon.example.org/users/admin#likes/2/undo"
-    assert data["object"]["id"] == "http://mastodon.example.org/users/admin#likes/2"
+    assert data["object"] == "http://mastodon.example.org/users/admin#likes/2"
   end
 
   test "it works for incoming unannounces with an existing notice" do