Merge branch 'bugfix/widen-streamer-blocks-for-1.1' into 'maint/1.1'

widen streaming API blocks (for 1.1)

See merge request pleroma/pleroma!1785

1 files changed, 82 insertions, 0 deletions

diff --git a/lib/pleroma/web/streamer/state.ex b/lib/pleroma/web/streamer/state.ex
new file mode 100644
index 000000000..5ce3ebb8a
--- /dev/null
+++ b/lib/pleroma/web/streamer/state.ex
@@ -0,0 +1,82 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.Streamer.State do
+  use GenServer
+  require Logger
+
+  alias Pleroma.Web.Streamer.StreamerSocket
+
+  @env Mix.env()
+
+  def start_link(_) do
+    GenServer.start_link(__MODULE__, %{sockets: %{}}, name: __MODULE__)
+  end
+
+  def add_socket(topic, socket) do
+    GenServer.call(__MODULE__, {:add, topic, socket})
+  end
+
+  def remove_socket(topic, socket) do
+    do_remove_socket(@env, topic, socket)
+  end
+
+  def get_sockets do
+    %{sockets: stream_sockets} = GenServer.call(__MODULE__, :get_state)
+    stream_sockets
+  end
+
+  def init(init_arg) do
+    {:ok, init_arg}
+  end
+
+  def handle_call(:get_state, _from, state) do
+    {:reply, state, state}
+  end
+
+  def handle_call({:add, topic, socket}, _from, %{sockets: sockets} = state) do
+    internal_topic = internal_topic(topic, socket)
+    stream_socket = StreamerSocket.from_socket(socket)
+
+    sockets_for_topic =
+      sockets
+      |> Map.get(internal_topic, [])
+      |> List.insert_at(0, stream_socket)
+      |> Enum.uniq()
+
+    state = put_in(state, [:sockets, internal_topic], sockets_for_topic)
+    Logger.debug("Got new conn for #{topic}")
+    {:reply, state, state}
+  end
+
+  def handle_call({:remove, topic, socket}, _from, %{sockets: sockets} = state) do
+    internal_topic = internal_topic(topic, socket)
+    stream_socket = StreamerSocket.from_socket(socket)
+
+    sockets_for_topic =
+      sockets
+      |> Map.get(internal_topic, [])
+      |> List.delete(stream_socket)
+
+    state = Kernel.put_in(state, [:sockets, internal_topic], sockets_for_topic)
+    {:reply, state, state}
+  end
+
+  defp do_remove_socket(:test, _, _) do
+    :ok
+  end
+
+  defp do_remove_socket(_env, topic, socket) do
+    GenServer.call(__MODULE__, {:remove, topic, socket})
+  end
+
+  defp internal_topic(topic, socket)
+       when topic in ~w[user user:notification direct] do
+    "#{topic}:#{socket.assigns[:user].id}"
+  end
+
+  defp internal_topic(topic, _) do
+    topic
+  end
+end