✨ feat: Enhance WebRTC setup for screen sharing capabilities

This commit introduces improvements in the WebRTC configuration and session handling for robust screen sharing. Changes include the setup of new peer connections with updated SDP handling processes to enhance the performance and reliability of live screen sharing sessions. This update aims to provide smoother video transmission by refining the interceptor registration and session description handling mechanisms.

Related issue: YJU-OKURA#80

main.go

@@ -367,7 +367,8 @@ func handleConnections(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	defer conn.Close()
-	clients[conn] = true
+
+	clients[conn] = true // Register client
 
 	for {
 		var msg Message
@@ -377,7 +378,28 @@ func handleConnections(w http.ResponseWriter, r *http.Request) {
 			delete(clients, conn)
 			break
 		}
-		broadcast <- msg
+
+		// Handle different message types here
+		switch msg.Type {
+		case "offer", "answer", "candidate":
+			// Assume 'Data' contains the SDP or ICE candidate information
+			handleWebRTCMessage(msg, conn)
+		default:
+			broadcast <- msg // Continue handling other messages as before
+		}
+	}
+}
+
+func handleWebRTCMessage(msg Message, sender *websocket.Conn) {
+	// Broadcast WebRTC signaling messages to all clients except the sender
+	for client := range clients {
+		if client != sender {
+			if err := client.WriteJSON(msg); err != nil {
+				log.Printf("error sending to client: %v, error: %v", client.RemoteAddr(), err)
+				client.Close()
+				delete(clients, client)
+			}
+		}
 	}
 }