create intial db, models, websocket and architecture.

internal/websocket/room.go

@@ -0,0 +1,38 @@
+package websocket
+
+import "github.com/gorilla/websocket"
+
+type Client struct {
+	conn *websocket.Conn
+	room *Room
+}
+
+type Room struct {
+	id      string
+	clients map[*Client]bool
+}
+
+func NewRoom(id string) *Room {
+	return &Room{
+		id:      id,
+		clients: make(map[*Client]bool),
+	}
+}
+
+func (r *Room) Register(client *Client) {
+	r.clients[client] = true
+}
+
+func (r *Room) Unregister(client *Client) {
+	delete(r.clients, client)
+	client.conn.Close()
+}
+
+func (r *Room) Broadcast(message []byte) {
+	for client := range r.clients {
+		err := client.conn.WriteMessage(websocket.TextMessage, message)
+		if err != nil {
+			r.Unregister(client)
+		}
+	}
+}