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

   1 defmodule Pleroma.Web.Streamer do
   2   use GenServer
   3   require Logger
   4   import Plug.Conn
   5
   6   def start_link do
   7     spawn(fn ->
   8       Process.sleep(1000 * 30) # 30 seconds
   9       GenServer.cast(__MODULE__, %{action: :ping})
  10     end)
  11     GenServer.start_link(__MODULE__, %{}, name: __MODULE__)
  12   end
  13
  14   def add_socket(topic, socket) do
  15     GenServer.cast(__MODULE__, %{action: :add, socket: socket, topic: topic})
  16   end
  17
  18   def remove_socket(topic, socket) do
  19     GenServer.cast(__MODULE__, %{action: :remove, socket: socket, topic: topic})
  20   end
  21
  22   def stream(topic, item) do
  23     GenServer.cast(__MODULE__, %{action: :stream, topic: topic, item: item})
  24   end
  25
  26   def handle_cast(%{action: :ping}, topics) do
  27     Map.values(topics)
  28     |> List.flatten
  29     |> Enum.each(fn (socket) ->
  30       Logger.debug("Sending keepalive ping")
  31       send socket.transport_pid, {:text, ""}
  32     end)
  33     spawn(fn ->
  34       Process.sleep(1000 * 30) # 30 seconds
  35       GenServer.cast(__MODULE__, %{action: :ping})
  36     end)
  37     {:noreply, topics}
  38   end
  39
  40   def handle_cast(%{action: :stream, topic: topic, item: item}, topics) do
  41     Logger.debug("Trying to push to #{topic}")
  42     Logger.debug("Pushing item to #{topic}")
  43     Enum.each(topics[topic] || [], fn (socket) ->
  44       json = %{
  45         event: "update",
  46         payload: Pleroma.Web.MastodonAPI.StatusView.render("status.json", activity: item, for: socket.assigns[:user]) |> Poison.encode!
  47       } |> Poison.encode!
  48
  49       send socket.transport_pid, {:text, json}
  50     end)
  51     {:noreply, topics}
  52   end
  53
  54   def handle_cast(%{action: :add, topic: topic, socket: socket}, sockets) do
  55     sockets_for_topic = sockets[topic] || []
  56     sockets_for_topic = Enum.uniq([socket | sockets_for_topic])
  57     sockets = Map.put(sockets, topic, sockets_for_topic)
  58     Logger.debug("Got new conn for #{topic}")
  59     IO.inspect(sockets)
  60     {:noreply, sockets}
  61   end
  62
  63   def handle_cast(%{action: :remove, topic: topic, socket: socket}, sockets) do
  64     sockets_for_topic = sockets[topic] || []
  65     sockets_for_topic = List.delete(sockets_for_topic, socket)
  66     sockets = Map.put(sockets, topic, sockets_for_topic)
  67     Logger.debug("Removed conn for #{topic}")
  68     IO.inspect(sockets)
  69     {:noreply, sockets}
  70   end
  71
  72   def handle_cast(m, state) do
  73     IO.inspect("Unknown: #{inspect(m)}, #{inspect(state)}")
  74     {:noreply, state}
  75   end
  76 end