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mobilizon/lib/service/activity_pub/relay.ex
2019-09-11 23:36:14 +02:00

88 lines
2.9 KiB
Elixir

# Portions of this file are derived from Pleroma:
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social>
# SPDX-License-Identifier: AGPL-3.0-only
# Upstream: https://git.pleroma.social/pleroma/pleroma/blob/develop/lib/pleroma/web/activity_pub/relay.ex
defmodule Mobilizon.Service.ActivityPub.Relay do
@moduledoc """
Handles following and unfollowing relays and instances
"""
alias Mobilizon.Activity
alias Mobilizon.Actors
alias Mobilizon.Actors.Actor
alias Mobilizon.Service.ActivityPub
alias MobilizonWeb.API.Follows
require Logger
def get_actor do
with {:ok, %Actor{} = actor} <-
Actors.get_or_create_actor_by_url("#{MobilizonWeb.Endpoint.url()}/relay") do
actor
end
end
def follow(target_instance) do
with %Actor{} = local_actor <- get_actor(),
{:ok, %Actor{} = target_actor} <- ActivityPub.get_or_fetch_by_url(target_instance),
{:ok, activity} <- Follows.follow(local_actor, target_actor) do
Logger.info("Relay: followed instance #{target_instance}; id=#{activity.data["id"]}")
{:ok, activity}
else
e ->
Logger.warn("Error while following remote instance: #{inspect(e)}")
{:error, e}
end
end
def unfollow(target_instance) do
with %Actor{} = local_actor <- get_actor(),
{:ok, %Actor{} = target_actor} <- ActivityPub.get_or_fetch_by_url(target_instance),
{:ok, activity} <- Follows.unfollow(local_actor, target_actor) do
Logger.info("Relay: unfollowed instance #{target_instance}: id=#{activity.data["id"]}")
{:ok, activity}
else
e ->
Logger.warn("Error while unfollowing remote instance: #{inspect(e)}")
{:error, e}
end
end
def accept(target_instance) do
with %Actor{} = local_actor <- get_actor(),
{:ok, %Actor{} = target_actor} <- ActivityPub.get_or_fetch_by_url(target_instance),
{:ok, activity} <- Follows.accept(target_actor, local_actor) do
{:ok, activity}
end
end
# def reject(target_instance) do
# with %Actor{} = local_actor <- get_actor(),
# {:ok, %Actor{} = target_actor} <- Activity.get_or_fetch_by_url(target_instance),
# {:ok, activity} <- Follows.reject(target_actor, local_actor) do
# {:ok, activity}
# end
# end
@doc """
Publish an activity to all relays following this instance
"""
def publish(%Activity{data: %{"object" => object}} = _activity) do
with %Actor{id: actor_id} = actor <- get_actor(),
{:ok, object} <-
Mobilizon.Service.ActivityPub.Transmogrifier.fetch_obj_helper_as_activity_streams(
object
) do
ActivityPub.announce(actor, object, "#{object["id"]}/announces/#{actor_id}", true, false)
else
e ->
Logger.error("Error while getting local instance actor: #{inspect(e)}")
end
end
def publish(err) do
Logger.error("Tried to publish a bad activity")
Logger.debug(inspect(err))
nil
end
end