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

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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
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alias Pleroma.Object
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Web.ActivityPub.Pipeline
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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
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
# 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