1 defmodule Pleroma.Web.ActivityPub.SideEffects do
3 This module looks at an inserted object and executes the side effects that it
4 implies. For example, a `Like` activity will increase the like count on the
5 liked object, a `Follow` activity will add the user to the follower
9 alias Pleroma.Notification
13 alias Pleroma.Web.ActivityPub.ActivityPub
14 alias Pleroma.Web.ActivityPub.Utils
16 def handle(object, meta \\ [])
19 # - Add like to object
20 # - Set up notification
21 def handle(%{data: %{"type" => "Like"}} = object, meta) do
22 liked_object = Object.get_by_ap_id(object.data["object"])
23 Utils.add_like_to_object(object, liked_object)
25 Notification.create_notifications(object)
31 # - Add announce to object
32 # - Set up notification
33 # - Stream out the announce
34 def handle(%{data: %{"type" => "Announce"}} = object, meta) do
35 announced_object = Object.get_by_ap_id(object.data["object"])
37 Utils.add_announce_to_object(object, announced_object)
39 Notification.create_notifications(object)
40 ActivityPub.stream_out(object)
45 def handle(%{data: %{"type" => "Undo", "object" => undone_object}} = object, meta) do
46 with undone_object <- Activity.get_by_ap_id(undone_object),
47 :ok <- handle_undoing(undone_object) do
53 # - Add reaction to object
54 # - Set up notification
55 def handle(%{data: %{"type" => "EmojiReact"}} = object, meta) do
56 reacted_object = Object.get_by_ap_id(object.data["object"])
57 Utils.add_emoji_reaction_to_object(object, reacted_object)
59 Notification.create_notifications(object)
65 # - Delete and unpins the create activity
66 # - Replace object with Tombstone
67 # - Set up notification
68 # - Reduce the user note count
69 # - Reduce the reply count
70 # - Stream out the activity
71 def handle(%{data: %{"type" => "Delete", "object" => deleted_object}} = object, meta) do
73 Object.normalize(deleted_object, false) || User.get_cached_by_ap_id(deleted_object)
76 case deleted_object do
78 with {:ok, deleted_object, activity} <- Object.delete(deleted_object),
79 %User{} = user <- User.get_cached_by_ap_id(deleted_object.data["actor"]) do
80 User.remove_pinnned_activity(user, activity)
82 {:ok, user} = ActivityPub.decrease_note_count_if_public(user, deleted_object)
84 if in_reply_to = deleted_object.data["inReplyTo"] do
85 Object.decrease_replies_count(in_reply_to)
88 ActivityPub.stream_out(object)
89 ActivityPub.stream_out_participations(deleted_object, user)
94 with {:ok, _} <- User.delete(deleted_object) do
100 Notification.create_notifications(object)
108 def handle(object, meta) do
112 def handle_undoing(%{data: %{"type" => "Like"}} = object) do
113 with %Object{} = liked_object <- Object.get_by_ap_id(object.data["object"]),
114 {:ok, _} <- Utils.remove_like_from_object(object, liked_object),
115 {:ok, _} <- Repo.delete(object) do
120 def handle_undoing(%{data: %{"type" => "EmojiReact"}} = object) do
121 with %Object{} = reacted_object <- Object.get_by_ap_id(object.data["object"]),
122 {:ok, _} <- Utils.remove_emoji_reaction_from_object(object, reacted_object),
123 {:ok, _} <- Repo.delete(object) do
128 def handle_undoing(%{data: %{"type" => "Announce"}} = object) do
129 with %Object{} = liked_object <- Object.get_by_ap_id(object.data["object"]),
130 {:ok, _} <- Utils.remove_announce_from_object(object, liked_object),
131 {:ok, _} <- Repo.delete(object) do
137 %{data: %{"type" => "Block", "actor" => blocker, "object" => blocked}} = object
139 with %User{} = blocker <- User.get_cached_by_ap_id(blocker),
140 %User{} = blocked <- User.get_cached_by_ap_id(blocked),
141 {:ok, _} <- User.unblock(blocker, blocked),
142 {:ok, _} <- Repo.delete(object) do
147 def handle_undoing(object), do: {:error, ["don't know how to handle", object]}