create initial frontend.

internal/api/websocket.go

@@ -0,0 +1,46 @@
+package api
+
+import (
+	"net/http"
+	"shagram/internal/websocket"
+
+	"github.com/gin-gonic/gin"
+	gws "github.com/gorilla/websocket"
+)
+
+var upgrader = gws.Upgrader{
+	CheckOrigin: func(r *http.Request) bool { return true },
+}
+
+func WebSocketHandler(hub *websocket.Hub) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		roomID := c.Param("room")
+		room := hub.GetOrCreateRoom(roomID)
+
+		conn, err := upgrader.Upgrade(c.Writer, c.Request, nil)
+		if err != nil {
+			return
+		}
+
+		client := &websocket.Client{Conn: conn, Room: room}
+		room.Register(client)
+
+		go func() {
+			defer func() {
+				room.Unregister(client)
+				hub.CleanupRoom(roomID)
+			}()
+
+			for {
+				var msg map[string]string
+				err := client.Conn.ReadJSON(&msg)
+				if err != nil {
+					break
+				}
+				message := []byte(msg["text"])
+				room.Broadcast(message)
+			}
+		}()
+	}
+
+}