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
10 alias Pleroma.Notification
14 alias Pleroma.Web.ActivityPub.ActivityPub
15 alias Pleroma.Web.ActivityPub.Pipeline
16 alias Pleroma.Web.ActivityPub.Utils
18 def handle(object, meta \\ [])
21 # - Add like to object
22 # - Set up notification
23 def handle(%{data: %{"type" => "Like"}} = object, meta) do
24 liked_object = Object.get_by_ap_id(object.data["object"])
25 Utils.add_like_to_object(object, liked_object)
27 Notification.create_notifications(object)
33 # - Actually create object
34 # - Rollback if we couldn't create it
35 # - Set up notifications
36 def handle(%{data: %{"type" => "Create"}} = activity, meta) do
37 with {:ok, _object, _meta} <- handle_object_creation(meta[:object_data], meta) do
38 Notification.create_notifications(activity)
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_object_creation(%{"type" => "ChatMessage"} = object, meta) do
113 with {:ok, object, meta} <- Pipeline.common_pipeline(object, meta) do
114 actor = User.get_cached_by_ap_id(object.data["actor"])
115 recipient = User.get_cached_by_ap_id(hd(object.data["to"]))
117 [[actor, recipient], [recipient, actor]]
118 |> Enum.each(fn [user, other_user] ->
120 if user.ap_id == actor.ap_id do
121 Chat.get_or_create(user.id, other_user.ap_id)
123 Chat.bump_or_create(user.id, other_user.ap_id)
133 def handle_object_creation(object) do
137 def handle_undoing(%{data: %{"type" => "Like"}} = object) do
138 with %Object{} = liked_object <- Object.get_by_ap_id(object.data["object"]),
139 {:ok, _} <- Utils.remove_like_from_object(object, liked_object),
140 {:ok, _} <- Repo.delete(object) do
145 def handle_undoing(%{data: %{"type" => "EmojiReact"}} = object) do
146 with %Object{} = reacted_object <- Object.get_by_ap_id(object.data["object"]),
147 {:ok, _} <- Utils.remove_emoji_reaction_from_object(object, reacted_object),
148 {:ok, _} <- Repo.delete(object) do
153 def handle_undoing(%{data: %{"type" => "Announce"}} = object) do
154 with %Object{} = liked_object <- Object.get_by_ap_id(object.data["object"]),
155 {:ok, _} <- Utils.remove_announce_from_object(object, liked_object),
156 {:ok, _} <- Repo.delete(object) do
162 %{data: %{"type" => "Block", "actor" => blocker, "object" => blocked}} = object
164 with %User{} = blocker <- User.get_cached_by_ap_id(blocker),
165 %User{} = blocked <- User.get_cached_by_ap_id(blocked),
166 {:ok, _} <- User.unblock(blocker, blocked),
167 {:ok, _} <- Repo.delete(object) do
172 def handle_undoing(object), do: {:error, ["don't know how to handle", object]}