akkoma/lib/pleroma/web/activity_pub/side_effects.ex

198 lines
6.1 KiB
Elixir
Raw Normal View History

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.Activity
2020-05-08 12:11:58 +00:00
alias Pleroma.Chat
alias Pleroma.ChatMessageReference
alias Pleroma.Notification
2019-10-23 10:18:05 +00:00
alias Pleroma.Object
alias Pleroma.Repo
alias Pleroma.User
2020-04-30 15:58:09 +00:00
alias Pleroma.Web.ActivityPub.ActivityPub
alias Pleroma.Web.ActivityPub.Pipeline
2019-10-23 10:18:05 +00:00
alias Pleroma.Web.ActivityPub.Utils
2020-05-29 13:44:03 +00:00
alias Pleroma.Web.Streamer
def handle(object, meta \\ [])
# Tasks this handles:
# - Add like to object
# - Set up notification
def handle(%{data: %{"type" => "Like"}} = object, meta) do
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
# Tasks this handles
# - Actually create object
# - Rollback if we couldn't create it
# - Set up notifications
def handle(%{data: %{"type" => "Create"}} = activity, meta) do
with {:ok, _object, _meta} <- handle_object_creation(meta[:object_data], meta) do
Notification.create_notifications(activity)
{:ok, activity, meta}
else
e -> Repo.rollback(e)
end
end
# Tasks this handles:
# - Add announce to object
# - Set up notification
# - Stream out the announce
def handle(%{data: %{"type" => "Announce"}} = object, meta) do
announced_object = Object.get_by_ap_id(object.data["object"])
2020-05-27 05:24:36 +00:00
user = User.get_cached_by_ap_id(object.data["actor"])
2020-05-21 11:16:21 +00:00
Utils.add_announce_to_object(object, announced_object)
2020-05-27 05:24:36 +00:00
if !User.is_internal_user?(user) do
2020-05-26 11:32:05 +00:00
Notification.create_notifications(object)
ActivityPub.stream_out(object)
end
{:ok, object, meta}
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
# - Set up notification
# - Reduce the user note count
2020-04-30 17:53:30 +00:00
# - Reduce the reply count
# - Stream out the activity
def handle(%{data: %{"type" => "Delete", "object" => deleted_object}} = object, meta) do
2020-04-30 13:57:27 +00:00
deleted_object =
Object.normalize(deleted_object, false) || User.get_cached_by_ap_id(deleted_object)
result =
case deleted_object do
%Object{} ->
2020-04-30 15:58:09 +00:00
with {:ok, deleted_object, activity} <- Object.delete(deleted_object),
%User{} = user <- User.get_cached_by_ap_id(deleted_object.data["actor"]) do
User.remove_pinnned_activity(user, activity)
2020-04-30 15:58:09 +00:00
{:ok, user} = ActivityPub.decrease_note_count_if_public(user, deleted_object)
if in_reply_to = deleted_object.data["inReplyTo"] do
Object.decrease_replies_count(in_reply_to)
end
ChatMessageReference.delete_for_object(deleted_object)
2020-04-30 15:58:09 +00:00
ActivityPub.stream_out(object)
ActivityPub.stream_out_participations(deleted_object, user)
2020-04-30 13:57:27 +00:00
:ok
end
%User{} ->
with {:ok, _} <- User.delete(deleted_object) do
:ok
end
end
if result == :ok do
Notification.create_notifications(object)
{:ok, object, meta}
2020-04-30 13:57:27 +00:00
else
{:error, result}
end
end
# Nothing to do
def handle(object, meta) do
{:ok, object, meta}
end
def handle_object_creation(%{"type" => "ChatMessage"} = object, meta) do
with {:ok, object, meta} <- Pipeline.common_pipeline(object, meta) do
actor = User.get_cached_by_ap_id(object.data["actor"])
recipient = User.get_cached_by_ap_id(hd(object.data["to"]))
[[actor, recipient], [recipient, actor]]
|> Enum.each(fn [user, other_user] ->
if user.local do
{:ok, chat} = Chat.bump_or_create(user.id, other_user.ap_id)
{:ok, cm_ref} = ChatMessageReference.create(chat, object, user.ap_id == actor.ap_id)
Streamer.stream(
["user", "user:pleroma_chat"],
{user, %{cm_ref | chat: chat, object: object}}
)
end
end)
{:ok, object, meta}
end
end
# Nothing to 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