109 lines
3.1 KiB
Elixir
109 lines
3.1 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.Federator.Publisher do
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alias Pleroma.Activity
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alias Pleroma.Config
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alias Pleroma.User
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alias Pleroma.Workers.PublisherWorker
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require Logger
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@moduledoc """
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Defines the contract used by federation implementations to publish messages to
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their peers.
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"""
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@doc """
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Determine whether an activity can be relayed using the federation module.
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"""
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@callback is_representable?(Pleroma.Activity.t()) :: boolean()
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@doc """
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Relays an activity to a specified peer, determined by the parameters. The
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parameters used are controlled by the federation module.
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"""
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@callback publish_one(Map.t()) :: {:ok, Map.t()} | {:error, any()}
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@doc """
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Enqueue publishing a single activity.
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"""
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@spec enqueue_one(module(), Map.t()) :: :ok
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def enqueue_one(module, %{} = params) do
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PublisherWorker.enqueue(
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"publish_one",
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%{"module" => to_string(module), "params" => params}
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)
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end
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@doc """
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Relays an activity to all specified peers.
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"""
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@callback publish(User.t(), Activity.t()) :: :ok | {:error, any()}
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@spec publish(User.t(), Activity.t()) :: :ok
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def publish(%User{} = user, %Activity{} = activity) do
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Config.get([:instance, :federation_publisher_modules])
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|> Enum.each(fn module ->
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if module.is_representable?(activity) do
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Logger.debug("Publishing #{activity.data["id"]} using #{inspect(module)}")
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module.publish(user, activity)
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end
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end)
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:ok
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end
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@doc """
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Gathers links used by an outgoing federation module for WebFinger output.
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"""
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@callback gather_webfinger_links(User.t()) :: list()
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@spec gather_webfinger_links(User.t()) :: list()
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def gather_webfinger_links(%User{} = user) do
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Config.get([:instance, :federation_publisher_modules])
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|> Enum.reduce([], fn module, links ->
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links ++ module.gather_webfinger_links(user)
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end)
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end
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@doc """
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Gathers nodeinfo protocol names supported by the federation module.
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"""
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@callback gather_nodeinfo_protocol_names() :: list()
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@spec gather_nodeinfo_protocol_names() :: list()
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def gather_nodeinfo_protocol_names do
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Config.get([:instance, :federation_publisher_modules])
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|> Enum.reduce([], fn module, links ->
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links ++ module.gather_nodeinfo_protocol_names()
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end)
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end
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@doc """
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Gathers a set of remote users given an IR envelope.
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"""
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def remote_users(%User{id: user_id}, %{data: %{"to" => to} = data}) do
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cc = Map.get(data, "cc", [])
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bcc =
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data
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|> Map.get("bcc", [])
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|> Enum.reduce([], fn ap_id, bcc ->
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case Pleroma.List.get_by_ap_id(ap_id) do
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%Pleroma.List{user_id: ^user_id} = list ->
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{:ok, following} = Pleroma.List.get_following(list)
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bcc ++ Enum.map(following, & &1.ap_id)
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_ ->
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bcc
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end
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end)
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[to, cc, bcc]
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|> Enum.concat()
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|> Enum.map(&User.get_cached_by_ap_id/1)
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|> Enum.filter(fn user -> user && !user.local end)
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end
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end
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