Add config option for enabling/disabling chat.

config/config.exs

@@ -56,6 +56,9 @@
   redirect_on_failure: true
   #base_url: "https://cache.pleroma.social"
 
+config :pleroma, :chat,
+  enabled: true
+
 # Import environment specific config. This must remain at the bottom
 # of this file so it overrides the configuration defined above.
 import_config "#{Mix.env}.exs"

lib/pleroma/application.ex

@@ -20,14 +20,18 @@ def start(_type, _args) do
                          limit: 2500
                        ]]),
       worker(Pleroma.Web.Federator, []),
-      worker(Pleroma.Web.ChatChannel.ChatChannelState, []),
       worker(Pleroma.Stats, []),
     ]
     ++ if Mix.env == :test, do: [], else: [worker(Pleroma.Web.Streamer, [])]
+    ++ if !chat_enabled(), do: [], else: [worker(Pleroma.Web.ChatChannel.ChatChannelState, [])]
 
     # See http://elixir-lang.org/docs/stable/elixir/Supervisor.html
     # for other strategies and supported options
     opts = [strategy: :one_for_one, name: Pleroma.Supervisor]
     Supervisor.start_link(children, opts)
   end
+
+  defp chat_enabled do
+    Application.get_env(:pleroma, :chat, []) |> Keyword.get(:enabled)
+  end
 end

lib/pleroma/web/channels/user_socket.ex

@@ -5,7 +5,9 @@ defmodule Pleroma.Web.UserSocket do
 
   ## Channels
   # channel "room:*", Pleroma.Web.RoomChannel
+  if Application.get_env(:pleroma, :chat) |> Keyword.get(:enabled) do
     channel "chat:*", Pleroma.Web.ChatChannel
+  end
 
   ## Transports
   transport :websocket, Phoenix.Transports.WebSocket

lib/pleroma/web/endpoint.ex

@@ -1,7 +1,9 @@
 defmodule Pleroma.Web.Endpoint do
   use Phoenix.Endpoint, otp_app: :pleroma
 
+  if Application.get_env(:pleroma, :chat) |> Keyword.get(:enabled) do
     socket "/socket", Pleroma.Web.UserSocket
+  end
   socket "/api/v1", Pleroma.Web.MastodonAPI.MastodonSocket
 
   # Serve at "/" the static files from "priv/static" directory.