Add channel to be joined

lib/birdy_chat_web/channels/server_socket.ex

@@ -0,0 +1,44 @@
+defmodule BirdyChatWeb.ServerSocket do
+  use Phoenix.Socket
+
+  # A Socket handler
+  #
+  # It's possible to control the websocket connection and
+  # assign values that can be accessed by your channel topics.
+
+  ## Channels
+
+  channel "server:*", BirdyChatWeb.ServerChannel
+
+  # 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}`. To control the
+  # response the client receives in that case, [define an error handler in the
+  # websocket
+  # configuration](https://hexdocs.pm/phoenix/Phoenix.Endpoint.html#socket/3-websocket-configuration).
+  #
+  # See `Phoenix.Token` documentation for examples in
+  # performing token verification on connect.
+  @impl true
+  def connect(_params, socket, _connect_info) do
+    {:ok, socket}
+  end
+
+  # Socket IDs 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:
+  #
+  #     Elixir.BirdyChatWeb.Endpoint.broadcast("user_socket:#{user.id}", "disconnect", %{})
+  #
+  # Returning `nil` makes this socket anonymous.
+  @impl true
+  def id(socket), do: "user_socket:#{socket.assigns.server_id}"
+end