feat: add content room subscription and messaging support

- Added `join_content` and `leave_content` WebSocket events for subscribing and unsubscribing to content rooms.
- Implemented `sendToContent` utility method for broadcasting messages to specific content rooms.
- Enhanced connection handling with logging and session validation updates.

backend/src/realtime/events.gateway.ts

@@ -1,9 +1,12 @@
 import { Logger } from "@nestjs/common";
 import { ConfigService } from "@nestjs/config";
 import {
+	ConnectedSocket,
+	MessageBody,
 	OnGatewayConnection,
 	OnGatewayDisconnect,
 	OnGatewayInit,
+	SubscribeMessage,
 	WebSocketGateway,
 	WebSocketServer,
 } from "@nestjs/websockets";
@@ -54,6 +57,8 @@ export class EventsGateway
 
 			if (!session.accessToken) {
 				this.logger.warn(`Client ${client.id} unauthorized connection`);
+				// Permettre les connexions anonymes pour voir les commentaires en temps réel ?
+				// Pour l'instant on déconnecte car le système actuel semble exiger l'auth
 				client.disconnect();
 				return;
 			}
@@ -75,8 +80,30 @@ export class EventsGateway
 		this.logger.log(`Client disconnected: ${client.id}`);
 	}
 
+	@SubscribeMessage("join_content")
+	handleJoinContent(
+		@ConnectedSocket() client: Socket,
+		@MessageBody() contentId: string,
+	) {
+		client.join(`content:${contentId}`);
+		this.logger.log(`Client ${client.id} joined content room: ${contentId}`);
+	}
+
+	@SubscribeMessage("leave_content")
+	handleLeaveContent(
+		@ConnectedSocket() client: Socket,
+		@MessageBody() contentId: string,
+	) {
+		client.leave(`content:${contentId}`);
+		this.logger.log(`Client ${client.id} left content room: ${contentId}`);
+	}
+
 	// Méthode utilitaire pour envoyer des messages à un utilisateur spécifique
 	sendToUser(userId: string, event: string, data: any) {
 		this.server.to(`user:${userId}`).emit(event, data);
 	}
+
+	sendToContent(contentId: string, event: string, data: any) {
+		this.server.to(`content:${contentId}`).emit(event, data);
+	}
 }