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