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# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.Relay do
alias Pleroma.Activity
alias Pleroma.Object
alias Pleroma.User
alias Pleroma.Web.ActivityPub.ActivityPub
require Logger
@relay_nickname "relay"
def get_actor do
actor =
relay_ap_id()
|> User.get_or_create_service_actor_by_ap_id(@relay_nickname)
actor
end
def relay_ap_id do
"#{Pleroma.Web.Endpoint.url()}/relay"
end
@spec follow(String.t()) :: {:ok, Activity.t()} | {:error, any()}
def follow(target_instance) do
with %User{} = local_user <- get_actor(),
{:ok, %User{} = target_user} <- User.get_or_fetch_by_ap_id(target_instance),
{:ok, activity} <- ActivityPub.follow(local_user, target_user) do
Logger.info("relay: followed instance: #{target_instance}; id=#{activity.data["id"]}")
{:ok, activity}
else
error -> format_error(error)
end
end
@spec unfollow(String.t()) :: {:ok, Activity.t()} | {:error, any()}
def unfollow(target_instance) do
with %User{} = local_user <- get_actor(),
{:ok, %User{} = target_user} <- User.get_or_fetch_by_ap_id(target_instance),
{:ok, activity} <- ActivityPub.unfollow(local_user, target_user) do
User.unfollow(local_user, target_user)
Logger.info("relay: unfollowed instance: #{target_instance}: id=#{activity.data["id"]}")
{:ok, activity}
else
error -> format_error(error)
end
end
@spec publish(any()) :: {:ok, Activity.t(), Object.t()} | {:error, any()}
def publish(%Activity{data: %{"type" => "Create"}} = activity) do
with %User{} = user <- get_actor(),
%Object{} = object <- Object.normalize(activity) do
ActivityPub.announce(user, object, nil, true, false)
else
error -> format_error(error)
end
end
def publish(_), do: {:error, "Not implemented"}
@spec list(boolean()) :: {:ok, [String.t()]} | {:error, any()}
def list(with_not_accepted \\ false) do
with %User{} = user <- get_actor() do
accepted =
user
|> User.following()
|> Enum.map(fn entry -> URI.parse(entry).host end)
|> Enum.uniq()
list =
if with_not_accepted do
without_accept =
user
|> Pleroma.Activity.following_requests_for_actor()
|> Enum.map(fn a -> URI.parse(a.data["object"]).host <> " (no Accept received)" end)
|> Enum.uniq()
accepted ++ without_accept
else
accepted
end
{:ok, list}
else
error -> format_error(error)
end
end
defp format_error({:error, error}), do: format_error(error)
defp format_error(error) do
Logger.error("error: #{inspect(error)}")
{:error, error}
end
end
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