can play game

backend/lib/backend_web/channels/user_socket.ex

@@ -1,36 +1,27 @@
 defmodule BackendWeb.UserSocket do
   use Phoenix.Socket
+  require Logger
 
-  # A Socket handler
-  #
-  # It's possible to control the websocket connection and
-  # assign values that can be accessed by your channel topics.
 
   ## Channels
-  channel("game:*", BackendWeb.GameChannel)
+  channel("user:*", BackendWeb.ConnectedUserChannel)
 
-  # Socket params are passed from the client and can
-  # be used to verify and authenticate a user. After
-  # verification, you can put default assigns into
-  # the socket that will be set for all channels, ie
-  #
-  #     {:ok, assign(socket, :user_id, verified_user_id)}
-  #
-  # To deny connection, return `:error` or `{:error, term}`.
   @impl true
-  def connect(_params, socket, _connect_info) do
-    {:ok, socket}
+  def connect(%{"user_name" => user_name}, socket, _connect_info) do
+    {:ok, assign(socket, :user_name, user_name)}
+  end
+
+  def connect(_params, _socket, _connect_info) do
+    Logger.warning("WebSocket connection rejected: user_name required")
+    {:error, %{reason: "user_name required"}}
   end
 
-  # Socket id's are topics that allow you to identify all sockets for a given user:
-  #
-  #     def id(socket), do: "user_socket:#{socket.assigns.user_id}"
-  #
-  # Would allow you to broadcast a "disconnect" event and terminate
-  # all active sockets and channels for a given user:
-  #
-  #
-  # Returning `nil` makes this socket anonymous.
   @impl true
+  def id(%{assigns: %{user_name: user_name}}) do
+    # assign websocket to user name
+    # allows other parts of app to manipulate all sockets for a given user
+    "user_socket:#{user_name}"
+  end
+
   def id(_socket), do: nil
 end