Merge branch 'develop' of git.pleroma.social:pleroma/pleroma into remake-remodel-dms

lib/pleroma/web/activity_pub/side_effects.ex

@@ -6,6 +6,7 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
   collection, and so on.
   """
   alias Pleroma.Chat
+  alias Pleroma.Activity
   alias Pleroma.Notification
   alias Pleroma.Object
   alias Pleroma.Repo
@@ -41,6 +42,25 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
     end
   end
 
+  def handle(%{data: %{"type" => "Undo", "object" => undone_object}} = object, meta) do
+    with undone_object <- Activity.get_by_ap_id(undone_object),
+         :ok <- handle_undoing(undone_object) do
+      {:ok, object, meta}
+    end
+  end
+
+  # Tasks this handles:
+  # - Add reaction to object
+  # - Set up notification
+  def handle(%{data: %{"type" => "EmojiReact"}} = object, meta) do
+    reacted_object = Object.get_by_ap_id(object.data["object"])
+    Utils.add_emoji_reaction_to_object(object, reacted_object)
+
+    Notification.create_notifications(object)
+
+    {:ok, object, meta}
+  end
+
   # Tasks this handles:
   # - Delete and unpins the create activity
   # - Replace object with Tombstone
@@ -109,4 +129,41 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
   def handle_object_creation(object) do
     {:ok, object}
   end
+
+  def handle_undoing(%{data: %{"type" => "Like"}} = object) do
+    with %Object{} = liked_object <- Object.get_by_ap_id(object.data["object"]),
+         {:ok, _} <- Utils.remove_like_from_object(object, liked_object),
+         {:ok, _} <- Repo.delete(object) do
+      :ok
+    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(%{data: %{"type" => "Announce"}} = object) do
+    with %Object{} = liked_object <- Object.get_by_ap_id(object.data["object"]),
+         {:ok, _} <- Utils.remove_announce_from_object(object, liked_object),
+         {:ok, _} <- Repo.delete(object) do
+      :ok
+    end
+  end
+
+  def handle_undoing(
+        %{data: %{"type" => "Block", "actor" => blocker, "object" => blocked}} = object
+      ) do
+    with %User{} = blocker <- User.get_cached_by_ap_id(blocker),
+         %User{} = blocked <- User.get_cached_by_ap_id(blocked),
+         {:ok, _} <- User.unblock(blocker, blocked),
+         {:ok, _} <- Repo.delete(object) do
+      :ok
+    end
+  end
+
+  def handle_undoing(object), do: {:error, ["don't know how to handle", object]}
 end