defmodule Pleroma.Web.ActivityPub.SideEffects do @moduledoc """ This module looks at an inserted object and executes the side effects that it implies. For example, a `Like` activity will increase the like count on the liked object, a `Follow` activity will add the user to the follower collection, and so on. """ alias Pleroma.Notification alias Pleroma.Object alias Pleroma.User alias Pleroma.Web.ActivityPub.Utils def handle(object, meta \\ []) # Tasks this handles: # - Add like to object # - Set up notification def handle(%{data: %{"type" => "Like"}} = object, meta) do {:ok, result} = Pleroma.Repo.transaction(fn -> liked_object = Object.get_by_ap_id(object.data["object"]) Utils.add_like_to_object(object, liked_object) Notification.create_notifications(object) {:ok, object, meta} end) result end # Tasks this handles: # - Delete create activity # - Replace object with Tombstone # - Set up notification def handle(%{data: %{"type" => "Delete", "object" => deleted_object}} = object, meta) do deleted_object = Object.normalize(deleted_object, false) || User.get_cached_by_ap_id(deleted_object) result = case deleted_object do %Object{} -> with {:ok, _, _} <- Object.delete(deleted_object) do :ok end %User{} -> with {:ok, _} <- User.delete(deleted_object) do :ok end end if result == :ok do Notification.create_notifications(object) {:ok, object, meta} else {:error, result} end end # Nothing to do def handle(object, meta) do {:ok, object, meta} end end