Undoing: Move undoing reactions to the pipeline everywhere.

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -373,31 +373,6 @@ defp do_react_with_emoji(user, object, emoji, options) do
     end
   end
 
-  @spec unreact_with_emoji(User.t(), String.t(), keyword()) ::
-          {:ok, Activity.t(), Object.t()} | {:error, any()}
-  def unreact_with_emoji(user, reaction_id, options \\ []) do
-    with {:ok, result} <-
-           Repo.transaction(fn -> do_unreact_with_emoji(user, reaction_id, options) end) do
-      result
-    end
-  end
-
-  defp do_unreact_with_emoji(user, reaction_id, options) do
-    with local <- Keyword.get(options, :local, true),
-         activity_id <- Keyword.get(options, :activity_id, nil),
-         user_ap_id <- user.ap_id,
-         %Activity{actor: ^user_ap_id} = reaction_activity <- Activity.get_by_ap_id(reaction_id),
-         object <- Object.normalize(reaction_activity),
-         unreact_data <- make_undo_data(user, reaction_activity, activity_id),
-         {:ok, activity} <- insert(unreact_data, local),
-         {:ok, object} <- remove_emoji_reaction_from_object(reaction_activity, object),
-         :ok <- maybe_federate(activity) do
-      {:ok, activity, object}
-    else
-      {:error, error} -> Repo.rollback(error)
-    end
-  end
-
   @spec announce(User.t(), Object.t(), String.t() | nil, boolean(), boolean()) ::
           {:ok, Activity.t(), Object.t()} | {:error, any()}
   def announce(

lib/pleroma/web/activity_pub/side_effects.ex

@@ -45,5 +45,13 @@ def handle_undoing(%{data: %{"type" => "Like"}} = object) do
     end
   end
 
+  def handle_undoing(%{data: %{"type" => "EmojiReact"}} = object) do
+    with %Object{} = reacted_object <- Object.get_by_ap_id(object.data["object"]),
+         {:ok, _} <- Utils.remove_emoji_reaction_from_object(object, reacted_object),
+         {:ok, _} <- Repo.delete(object) do
+      :ok
+    end
+  end
+
   def handle_undoing(object), do: {:error, ["don't know how to handle", object]}
 end

lib/pleroma/web/activity_pub/transmogrifier.ex

@@ -806,28 +806,6 @@ def handle_incoming(
     end
   end
 
-  def handle_incoming(
-        %{
-          "type" => "Undo",
-          "object" => %{"type" => "EmojiReact", "id" => reaction_activity_id},
-          "actor" => _actor,
-          "id" => id
-        } = data,
-        _options
-      ) do
-    with actor <- Containment.get_actor(data),
-         {:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
-         {:ok, activity, _} <-
-           ActivityPub.unreact_with_emoji(actor, reaction_activity_id,
-             activity_id: id,
-             local: false
-           ) do
-      {:ok, activity}
-    else
-      _e -> :error
-    end
-  end
-
   def handle_incoming(
         %{
           "type" => "Undo",
@@ -865,10 +843,11 @@ def handle_incoming(
   def handle_incoming(
         %{
           "type" => "Undo",
-          "object" => %{"type" => "Like"}
+          "object" => %{"type" => type}
         } = data,
         _options
-      ) do
+      )
+      when type in ["Like", "EmojiReact"] do
     with {:ok, activity, _} <- Pipeline.common_pipeline(data, local: false) do
       {:ok, activity}
     end

lib/pleroma/web/common_api/common_api.ex

@@ -170,7 +170,7 @@ def unfavorite(id, user) do
          %Object{} = note <- Object.normalize(activity, false),
          %Activity{} = like <- Utils.get_existing_like(user.ap_id, note),
          {:ok, undo, _} <- Builder.undo(user, like),
-         {:ok, activity, _} <- Pipeline.common_pipeline(undo, local: false) do
+         {:ok, activity, _} <- Pipeline.common_pipeline(undo, local: true) do
       {:ok, activity}
     else
       {:find_activity, _} -> {:error, :not_found}
@@ -189,8 +189,10 @@ def react_with_emoji(id, user, emoji) do
   end
 
   def unreact_with_emoji(id, user, emoji) do
-    with %Activity{} = reaction_activity <- Utils.get_latest_reaction(id, user, emoji) do
+    with %Activity{} = reaction_activity <- Utils.get_latest_reaction(id, user, emoji),
-      ActivityPub.unreact_with_emoji(user, reaction_activity.data["id"])
+         {:ok, undo, _} <- Builder.undo(user, reaction_activity),
+         {:ok, activity, _} <- Pipeline.common_pipeline(undo, local: true) do
+      {:ok, activity}
     else
       _ ->
         {:error, dgettext("errors", "Could not remove reaction emoji")}

lib/pleroma/web/pleroma_api/controllers/pleroma_api_controller.ex

@@ -98,7 +98,8 @@ def unreact_with_emoji(%{assigns: %{user: user}} = conn, %{
         "id" => activity_id,
         "emoji" => emoji
       }) do
-    with {:ok, _activity, _object} <- CommonAPI.unreact_with_emoji(activity_id, user, emoji),
+    with {:ok, _activity} <-
+           CommonAPI.unreact_with_emoji(activity_id, user, emoji),
          activity <- Activity.get_by_id(activity_id) do
       conn
       |> put_view(StatusView)

test/web/activity_pub/activity_pub_test.exs

@@ -939,62 +939,6 @@ test "reverts emoji reaction on error" do
     end
   end
 
-  describe "unreacting to an object" do
-    test_with_mock "sends an activity to federation", Federator, [:passthrough], [] do
-      Config.put([:instance, :federating], true)
-      user = insert(:user)
-      reactor = insert(:user)
-      {:ok, activity} = CommonAPI.post(user, %{"status" => "YASSSS queen slay"})
-      assert object = Object.normalize(activity)
-
-      {:ok, reaction_activity, _object} = ActivityPub.react_with_emoji(reactor, object, "🔥")
-
-      assert called(Federator.publish(reaction_activity))
-
-      {:ok, unreaction_activity, _object} =
-        ActivityPub.unreact_with_emoji(reactor, reaction_activity.data["id"])
-
-      assert called(Federator.publish(unreaction_activity))
-    end
-
-    test "adds an undo activity to the db" do
-      user = insert(:user)
-      reactor = insert(:user)
-      {:ok, activity} = CommonAPI.post(user, %{"status" => "YASSSS queen slay"})
-      assert object = Object.normalize(activity)
-
-      {:ok, reaction_activity, _object} = ActivityPub.react_with_emoji(reactor, object, "🔥")
-
-      {:ok, unreaction_activity, _object} =
-        ActivityPub.unreact_with_emoji(reactor, reaction_activity.data["id"])
-
-      assert unreaction_activity.actor == reactor.ap_id
-      assert unreaction_activity.data["object"] == reaction_activity.data["id"]
-
-      object = Object.get_by_ap_id(object.data["id"])
-      assert object.data["reaction_count"] == 0
-      assert object.data["reactions"] == []
-    end
-
-    test "reverts emoji unreact on error" do
-      [user, reactor] = insert_list(2, :user)
-      {:ok, activity} = CommonAPI.post(user, %{"status" => "Status"})
-      object = Object.normalize(activity)
-
-      {:ok, reaction_activity, _object} = ActivityPub.react_with_emoji(reactor, object, "😀")
-
-      with_mock(Utils, [:passthrough], maybe_federate: fn _ -> {:error, :reverted} end) do
-        assert {:error, :reverted} =
-                 ActivityPub.unreact_with_emoji(reactor, reaction_activity.data["id"])
-      end
-
-      object = Object.get_by_ap_id(object.data["id"])
-
-      assert object.data["reaction_count"] == 1
-      assert object.data["reactions"] == [["😀", [reactor.ap_id]]]
-    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

@@ -23,10 +23,38 @@ defmodule Pleroma.Web.ActivityPub.SideEffectsTest do
       {:ok, post} = CommonAPI.post(poster, %{"status" => "hey"})
       {:ok, like} = CommonAPI.favorite(user, post.id)
 
+      {:ok, reaction, _} = CommonAPI.react_with_emoji(post.id, user, "👍")
+
       {: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}
+      {:ok, undo_data, _meta} = Builder.undo(user, reaction)
+      {:ok, reaction_undo, _meta} = ActivityPub.persist(undo_data, local: true)
+
+      %{
+        like_undo: like_undo,
+        post: post,
+        like: like,
+        reaction_undo: reaction_undo,
+        reaction: reaction
+      }
+    end
+
+    test "a reaction undo removes the reaction from the object", %{
+      reaction_undo: reaction_undo,
+      post: post
+    } do
+      {:ok, _reaction_undo, _} = SideEffects.handle(reaction_undo)
+
+      object = Object.get_by_ap_id(post.data["object"])
+
+      assert object.data["reaction_count"] == 0
+      assert object.data["reactions"] == []
+    end
+
+    test "deletes the original reaction", %{reaction_undo: reaction_undo, reaction: reaction} do
+      {:ok, _reaction_undo, _} = SideEffects.handle(reaction_undo)
+      refute Activity.get_by_id(reaction.id)
     end
 
     test "a like undo removes the like from the object", %{like_undo: like_undo, post: post} do

test/web/common_api/common_api_test.exs

@@ -295,10 +295,11 @@ test "unreacting to a status with an emoji" do
       {:ok, activity} = CommonAPI.post(other_user, %{"status" => "cofe"})
       {:ok, reaction, _} = CommonAPI.react_with_emoji(activity.id, user, "👍")
 
-      {:ok, unreaction, _} = CommonAPI.unreact_with_emoji(activity.id, user, "👍")
+      {:ok, unreaction} = CommonAPI.unreact_with_emoji(activity.id, user, "👍")
 
       assert unreaction.data["type"] == "Undo"
       assert unreaction.data["object"] == reaction.data["id"]
+      assert unreaction.local
     end
 
     test "repeating a status" do

test/web/pleroma_api/controllers/pleroma_api_controller_test.exs

@@ -3,12 +3,14 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.PleromaAPI.PleromaAPIControllerTest do
+  use Oban.Testing, repo: Pleroma.Repo
   use Pleroma.Web.ConnCase
 
   alias Pleroma.Conversation.Participation
   alias Pleroma.Notification
   alias Pleroma.Object
   alias Pleroma.Repo
+  alias Pleroma.Tests.ObanHelpers
   alias Pleroma.User
   alias Pleroma.Web.CommonAPI
 
@@ -41,7 +43,9 @@ test "DELETE /api/v1/pleroma/statuses/:id/reactions/:emoji", %{conn: conn} do
     other_user = insert(:user)
 
     {:ok, activity} = CommonAPI.post(user, %{"status" => "#cofe"})
-    {:ok, activity, _object} = CommonAPI.react_with_emoji(activity.id, other_user, "☕")
+    {:ok, _reaction, _object} = CommonAPI.react_with_emoji(activity.id, other_user, "☕")
+
+    ObanHelpers.perform_all()
 
     result =
       conn
@@ -52,7 +56,9 @@ test "DELETE /api/v1/pleroma/statuses/:id/reactions/:emoji", %{conn: conn} do
     assert %{"id" => id} = json_response(result, 200)
     assert to_string(activity.id) == id
 
-    object = Object.normalize(activity)
+    ObanHelpers.perform_all()
+
+    object = Object.get_by_ap_id(activity.data["object"])
 
     assert object.data["reaction_count"] == 0
   end