akkoma/lib/pleroma/web/activity_pub/side_effects.ex
lain 6aa116eca7 Create activity handling: Flip it and reverse it
Both objects and create activities will now go through the common
pipeline and will be validated. Objects are now created as a side
effect of the Create activity, rolling back a transaction if it's
not possible to insert the object.
2020-04-28 16:26:19 +02:00

73 lines
2 KiB
Elixir

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.Chat
alias Pleroma.Notification
alias Pleroma.Object
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Web.ActivityPub.Pipeline
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
# - 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
# 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
Chat.bump_or_create(user.id, other_user.ap_id)
end
end)
{:ok, object, meta}
end
end
# Nothing to do
def handle_object_creation(object) do
{:ok, object}
end
end