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authordcc <dcc@logografos.com>2024-05-15 00:57:23 -0700
committerdcc <dcc@logografos.com>2024-05-15 00:57:23 -0700
commitb31a934a804aed3f35442ceafe2080b0955e7317 (patch)
tree947b13a0388ecea81e05dd980baa10f7546860b9 /lib/pleroma/web/federator/publisher.ex
parentea33a0d3427f8b30b82a6ddbc0ff7429cfaf8d91 (diff)
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-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.Federator.Publisher do
- alias Pleroma.Activity
- alias Pleroma.Config
- alias Pleroma.User
- alias Pleroma.Workers.PublisherWorker
-
- require Logger
-
- @moduledoc """
- Defines the contract used by federation implementations to publish messages to
- their peers.
- """
-
- @doc """
- Determine whether an activity can be relayed using the federation module.
- """
- @callback is_representable?(Pleroma.Activity.t()) :: boolean()
-
- @doc """
- Relays an activity to a specified peer, determined by the parameters. The
- parameters used are controlled by the federation module.
- """
- @callback publish_one(Map.t()) :: {:ok, Map.t()} | {:error, any()}
-
- @doc """
- Enqueue publishing a single activity.
- """
- @spec enqueue_one(module(), Map.t()) :: :ok
- def enqueue_one(module, %{} = params) do
- PublisherWorker.enqueue(
- "publish_one",
- %{"module" => to_string(module), "params" => params}
- )
- end
-
- @doc """
- Relays an activity to all specified peers.
- """
- @callback publish(User.t(), Activity.t()) :: :ok | {:error, any()}
-
- @spec publish(User.t(), Activity.t()) :: :ok
- def publish(%User{} = user, %Activity{} = activity) do
- Config.get([:instance, :federation_publisher_modules])
- |> Enum.each(fn module ->
- if module.is_representable?(activity) do
- Logger.debug("Publishing #{activity.data["id"]} using #{inspect(module)}")
- module.publish(user, activity)
- end
- end)
-
- :ok
- end
-
- @doc """
- Gathers links used by an outgoing federation module for WebFinger output.
- """
- @callback gather_webfinger_links(User.t()) :: list()
-
- @spec gather_webfinger_links(User.t()) :: list()
- def gather_webfinger_links(%User{} = user) do
- Config.get([:instance, :federation_publisher_modules])
- |> Enum.reduce([], fn module, links ->
- links ++ module.gather_webfinger_links(user)
- end)
- end
-
- @doc """
- Gathers nodeinfo protocol names supported by the federation module.
- """
- @callback gather_nodeinfo_protocol_names() :: list()
-
- @spec gather_nodeinfo_protocol_names() :: list()
- def gather_nodeinfo_protocol_names do
- Config.get([:instance, :federation_publisher_modules])
- |> Enum.reduce([], fn module, links ->
- links ++ module.gather_nodeinfo_protocol_names()
- end)
- end
-
- @doc """
- Gathers a set of remote users given an IR envelope.
- """
- def remote_users(%User{id: user_id}, %{data: %{"to" => to} = data}) do
- cc = Map.get(data, "cc", [])
-
- bcc =
- data
- |> Map.get("bcc", [])
- |> Enum.reduce([], fn ap_id, bcc ->
- case Pleroma.List.get_by_ap_id(ap_id) do
- %Pleroma.List{user_id: ^user_id} = list ->
- {:ok, following} = Pleroma.List.get_following(list)
- bcc ++ Enum.map(following, & &1.ap_id)
-
- _ ->
- bcc
- end
- end)
-
- [to, cc, bcc]
- |> Enum.concat()
- |> Enum.map(&User.get_cached_by_ap_id/1)
- |> Enum.filter(fn user -> user && !user.local end)
- end
-end