-defmodule Pleroma.Web.Streamer do
- use GenServer
- require Logger
- alias Pleroma.{User, Notification}
-
- def start_link do
- spawn(fn ->
- Process.sleep(1000 * 30) # 30 seconds
- GenServer.cast(__MODULE__, %{action: :ping})
- end)
- GenServer.start_link(__MODULE__, %{}, name: __MODULE__)
- end
-
- def add_socket(topic, socket) do
- GenServer.cast(__MODULE__, %{action: :add, socket: socket, topic: topic})
- end
-
- def remove_socket(topic, socket) do
- GenServer.cast(__MODULE__, %{action: :remove, socket: socket, topic: topic})
- end
-
- def stream(topic, item) do
- GenServer.cast(__MODULE__, %{action: :stream, topic: topic, item: item})
- end
-
- def handle_cast(%{action: :ping}, topics) do
- Map.values(topics)
- |> List.flatten
- |> Enum.each(fn (socket) ->
- Logger.debug("Sending keepalive ping")
- send socket.transport_pid, {:text, ""}
- end)
- spawn(fn ->
- Process.sleep(1000 * 30) # 30 seconds
- GenServer.cast(__MODULE__, %{action: :ping})
- end)
- {:noreply, topics}
- end
-
- def handle_cast(%{action: :stream, topic: "user", item: %Notification{} = item}, topics) do
- topic = "user:#{item.user_id}"
- Enum.each(topics[topic] || [], fn (socket) ->
- json = %{
- event: "notification",
- payload: Pleroma.Web.MastodonAPI.MastodonAPIController.render_notification(socket.assigns["user"], item) |> Poison.encode!
- } |> Poison.encode!
-
- send socket.transport_pid, {:text, json}
- end)
- {:noreply, topics}
- end
-
- def handle_cast(%{action: :stream, topic: "user", item: item}, topics) do
- Logger.debug("Trying to push to users")
- recipient_topics = User.get_recipients_from_activity(item)
- |> Enum.map(fn (%{id: id}) -> "user:#{id}" end)
-
- Enum.each(recipient_topics, fn (topic) ->
- push_to_socket(topics, topic, item)
- end)
- {:noreply, topics}
- end
-
- def handle_cast(%{action: :stream, topic: topic, item: item}, topics) do
- Logger.debug("Trying to push to #{topic}")
- Logger.debug("Pushing item to #{topic}")
- push_to_socket(topics, topic, item)
- {:noreply, topics}
- end
-
- def handle_cast(%{action: :add, topic: topic, socket: socket}, sockets) do
- topic = internal_topic(topic, socket)
- sockets_for_topic = sockets[topic] || []
- sockets_for_topic = Enum.uniq([socket | sockets_for_topic])
- sockets = Map.put(sockets, topic, sockets_for_topic)
- Logger.debug("Got new conn for #{topic}")
- {:noreply, sockets}
- end
-
- def handle_cast(%{action: :remove, topic: topic, socket: socket}, sockets) do
- topic = internal_topic(topic, socket)
- sockets_for_topic = sockets[topic] || []
- sockets_for_topic = List.delete(sockets_for_topic, socket)
- sockets = Map.put(sockets, topic, sockets_for_topic)
- Logger.debug("Removed conn for #{topic}")
- {:noreply, sockets}
- end
-
- def handle_cast(m, state) do
- Logger.info("Unknown: #{inspect(m)}, #{inspect(state)}")
- {:noreply, state}
- end
-
- def push_to_socket(topics, topic, item) do
- Enum.each(topics[topic] || [], fn (socket) ->
- json = %{
- event: "update",
- payload: Pleroma.Web.MastodonAPI.StatusView.render("status.json", activity: item, for: socket.assigns[:user]) |> Poison.encode!
- } |> Poison.encode!
-
- send socket.transport_pid, {:text, json}
- end)
- end
-
- defp internal_topic("user", socket) do
- "user:#{socket.assigns[:user].id}"
- end
-
- defp internal_topic(topic, _), do: topic
-end