git.squeep.com Git - akkoma/blob - lib/pleroma/web/federator/federator.ex

   1 defmodule Pleroma.Web.Federator do
   2   use GenServer
   3   alias Pleroma.User
   4   alias Pleroma.Web.WebFinger
   5   require Logger
   6
   7   @websub Application.get_env(:pleroma, :websub)
   8   @max_jobs 10
   9
  10   def start_link do
  11     GenServer.start_link(__MODULE__, {:sets.new(), :queue.new()}, name: __MODULE__)
  12   end
  13
  14   def handle(:publish, activity) do
  15     Logger.debug(fn -> "Running publish for #{activity.data["id"]}" end)
  16     with actor when not is_nil(actor) <- User.get_cached_by_ap_id(activity.data["actor"]) do
  17       Logger.debug(fn -> "Sending #{activity.data["id"]} out via websub" end)
  18       Pleroma.Web.Websub.publish(Pleroma.Web.OStatus.feed_path(actor), actor, activity)
  19
  20       {:ok, actor} = WebFinger.ensure_keys_present(actor)
  21       Logger.debug(fn -> "Sending #{activity.data["id"]} out via salmon" end)
  22       Pleroma.Web.Salmon.publish(actor, activity)
  23     end
  24   end
  25
  26   def handle(:verify_websub, websub) do
  27     Logger.debug(fn -> "Running websub verification for #{websub.id} (#{websub.topic}, #{websub.callback})" end)
  28     @websub.verify(websub)
  29   end
  30
  31   def handle(type, payload) do
  32     Logger.debug(fn -> "Unknown task: #{type}" end)
  33     {:error, "Don't know what do do with this"}
  34   end
  35
  36   def enqueue(type, payload) do
  37     if Mix.env == :test do
  38       handle(type, payload)
  39     else
  40       GenServer.cast(__MODULE__, {:enqueue, type, payload})
  41     end
  42   end
  43
  44   def maybe_start_job(running_jobs, queue) do
  45     if (:sets.size(running_jobs) < @max_jobs) && !:queue.is_empty(queue) do
  46       {{:value, {type, payload}}, queue} = :queue.out(queue)
  47       {:ok, pid} = Task.start(fn -> handle(type, payload) end)
  48       mref = Process.monitor(pid)
  49       {:sets.add_element(mref, running_jobs), queue}
  50     else
  51       {running_jobs, queue}
  52     end
  53   end
  54
  55   def handle_cast({:enqueue, type, payload}, {running_jobs, queue}) do
  56     queue = :queue.in({type, payload}, queue)
  57     {running_jobs, queue} = maybe_start_job(running_jobs, queue)
  58     {:noreply, {running_jobs, queue}}
  59   end
  60
  61   def handle_info({:DOWN, ref, :process, _pid, _reason}, {running_jobs, queue}) do
  62     running_jobs = :sets.del_element(ref, running_jobs)
  63     {running_jobs, queue} = maybe_start_job(running_jobs, queue)
  64     {:noreply, {running_jobs, queue}}
  65   end
  66
  67   def handle_cast(m, state) do
  68     IO.inspect("Unknown: #{inspect(m)}, #{inspect(state)}")
  69     {:noreply, state}
  70   end
  71 end