implement alternative match-making approach with Lua scripts in Redis

main-server/app/channels/application_cable/channel.rb

@@ -0,0 +1,4 @@
+module ApplicationCable
+  class Channel < ActionCable::Channel::Base
+  end
+end

main-server/app/channels/application_cable/connection.rb

@@ -0,0 +1,21 @@
+module ApplicationCable
+  class Connection < ActionCable::Connection::Base
+    identified_by :current_user
+
+    def connect
+      self.current_user = find_user
+      reject_unauthorized_connection unless current_user
+    end
+
+    private
+
+    def find_user
+      token = request.params[:token].presence ||
+              request.headers["Authorization"]&.split(" ")&.last
+      return unless token
+
+      decoded = JwtService.decode(token)
+      User.find_by(id: decoded[:user_id]) if decoded
+    end
+  end
+end