socket are working but it's not the right way

srcs/requirements/nestjs/api_back/src/chat/chat.gateway.ts

@@ -33,17 +33,18 @@ export class ChatGateway
 	async joinRoom(@ConnectedSocket() socket, @MessageBody() room_name: string): Promise<void>
 	{
 		console.log('- in joinRoom gateway');
+		socket.leave(socket.room);
 		socket.join(room_name);
+		socket.room = room_name;
 	}
 
 	@SubscribeMessage('message')
 	async handleMessage(@ConnectedSocket() socket, @MessageBody() message: string): Promise<void>
 	{
 		console.log('- in handleMessage gateway');
-		let room_name = await this.chatService.getCurrentRoom(socket.username);
-		console.log("-- room_name :", room_name);
-		//socket.to(room_name).emit('message', socket.username, message);
-		socket.emit('message', socket.username, message);
+		//let room_name = await this.chatService.getCurrentRoom(socket.username);
+		console.log("-- room_name :", socket.room);
+		socket.to(socket.room).emit('message', socket.username, message);
 		this.chatService.addMessageToCurrentRoom(socket.username, message);
 	}
 }

srcs/requirements/svelte/api_front/public/build/bundle.js

@@ -3854,6 +3854,10 @@ var app = (function () {
     }
     async function create_room(room_name, room_type) {
         console.log("in create_room");
+        let form_data = {
+            room_name: room_name,
+            room_type: room_type,
+        };
         // send the new room
         const response = await fetch('/api/v2/chat/create', {
             method: 'POST',
@@ -3898,6 +3902,7 @@ var app = (function () {
         let data = await response.json();
         console.log(data.message);
         await get_room_messages();
+        socket$1.emit('join', name);
         room_name.set(name);
         layout.set("room");
     }
@@ -7677,7 +7682,7 @@ var app = (function () {
     		if (!formIsValid) return;
 
     		// send the new room
-    		const response = await create_room();
+    		const response = await create_room(room_name, room_type);
 
     		// go to room
     		if (response.status === 200 && response.message === "successfull room creation") {

srcs/requirements/svelte/api_front/src/pieces/chat/Request_rooms.ts

@@ -20,7 +20,7 @@ export async function create_room(room_name, room_type)
 {
 	console.log("in create_room");
 
-	let formData = {
+	let form_data = {
 		room_name: room_name,
 		room_type: room_type,
 	};
@@ -79,6 +79,7 @@ export async function change_room(name)
 	console.log(data.message);
 
 	await get_room_messages();
+	socket.emit('join', name);
 
 	room_name.set(name);
 	layout.set("room");