feat: integrate user preferences for online status in WebSocket gateway

- Added `UsersService` to manage user preferences in `EventsGateway`.
- Enhanced online/offline broadcasting to respect user `showOnlineStatus` preference.
- Updated `handleTyping` and `check_status` to verify user preferences before emitting events.
- Abstracted status broadcasting logic into `broadcastStatus`.

backend/src/realtime/events.gateway.spec.ts

@@ -1,6 +1,7 @@
 import { ConfigService } from "@nestjs/config";
 import { Test, TestingModule } from "@nestjs/testing";
 import { JwtService } from "../crypto/services/jwt.service";
+import { UsersService } from "../users/users.service";
 import { EventsGateway } from "./events.gateway";
 
 describe("EventsGateway", () => {
@@ -15,12 +16,17 @@ describe("EventsGateway", () => {
 		get: jest.fn().mockReturnValue("secret-password-32-chars-long-!!!"),
 	};
 
+	const mockUsersService = {
+		findOne: jest.fn(),
+	};
+
 	beforeEach(async () => {
 		const module: TestingModule = await Test.createTestingModule({
 			providers: [
 				EventsGateway,
 				{ provide: JwtService, useValue: mockJwtService },
 				{ provide: ConfigService, useValue: mockConfigService },
+				{ provide: UsersService, useValue: mockUsersService },
 			],
 		}).compile();
 

backend/src/realtime/events.gateway.ts

@@ -1,4 +1,4 @@
-import { Logger } from "@nestjs/common";
+import { forwardRef, Inject, Logger } from "@nestjs/common";
 import { ConfigService } from "@nestjs/config";
 import {
 	ConnectedSocket,
@@ -14,6 +14,7 @@ import { getIronSession } from "iron-session";
 import { Server, Socket } from "socket.io";
 import { getSessionOptions, SessionData } from "../auth/session.config";
 import { JwtService } from "../crypto/services/jwt.service";
+import { UsersService } from "../users/users.service";
 
 @WebSocketGateway({
 	transports: ["websocket"],
@@ -63,6 +64,8 @@ export class EventsGateway
 	constructor(
 		private readonly jwtService: JwtService,
 		private readonly configService: ConfigService,
+		@Inject(forwardRef(() => UsersService))
+		private readonly usersService: UsersService,
 	) {}
 
 	afterInit(_server: Server) {
@@ -106,9 +109,15 @@ export class EventsGateway
 
 			// Gérer le statut en ligne
 			const userId = payload.sub as string;
+
 			if (!this.onlineUsers.has(userId)) {
 				this.onlineUsers.set(userId, new Set());
-				this.server.emit("user_status", { userId, status: "online" });
+
+				// Vérifier les préférences de l'utilisateur
+				const user = await this.usersService.findOne(userId);
+				if (user?.showOnlineStatus) {
+					this.broadcastStatus(userId, "online");
+				}
 			}
 			this.onlineUsers.get(userId)?.add(client.id);
 
@@ -119,19 +128,31 @@ export class EventsGateway
 		}
 	}
 
-	handleDisconnect(client: Socket) {
+	async handleDisconnect(client: Socket) {
 		const userId = client.data.user?.sub;
 		if (userId && this.onlineUsers.has(userId)) {
 			const sockets = this.onlineUsers.get(userId);
 			sockets?.delete(client.id);
 			if (sockets?.size === 0) {
 				this.onlineUsers.delete(userId);
-				this.server.emit("user_status", { userId, status: "offline" });
+
+				const user = await this.usersService.findOne(userId);
+				if (user?.showOnlineStatus) {
+					this.broadcastStatus(userId, "offline");
+				}
 			}
 		}
 		this.logger.log(`Client disconnected: ${client.id}`);
 	}
 
+	broadcastStatus(userId: string, status: "online" | "offline") {
+		this.server.emit("user_status", { userId, status });
+	}
+
+	isUserOnline(userId: string): boolean {
+		return this.onlineUsers.has(userId);
+	}
+
 	@SubscribeMessage("join_content")
 	handleJoinContent(
 		@ConnectedSocket() client: Socket,
@@ -151,13 +172,20 @@ export class EventsGateway
 	}
 
 	@SubscribeMessage("typing")
-	handleTyping(
+	async handleTyping(
 		@ConnectedSocket() client: Socket,
 		@MessageBody() data: { recipientId: string; isTyping: boolean },
 	) {
 		const userId = client.data.user?.sub;
 		if (!userId) return;
 
+		// Optionnel: vérifier si l'utilisateur autorise le statut en ligne avant d'émettre "typing"
+		// ou si on considère que typing est une interaction directe qui outrepasse le statut.
+		// Instagram affiche "Typing..." même si le statut en ligne est désactivé si on est dans le chat.
+		// Mais par souci de cohérence avec "showOnlineStatus", on peut le vérifier.
+		const user = await this.usersService.findOne(userId);
+		if (!user?.showOnlineStatus) return;
+
 		this.server.to(`user:${data.recipientId}`).emit("user_typing", {
 			userId,
 			isTyping: data.isTyping,
@@ -165,13 +193,19 @@ export class EventsGateway
 	}
 
 	@SubscribeMessage("check_status")
-	handleCheckStatus(
+	async handleCheckStatus(
 		@ConnectedSocket() _client: Socket,
 		@MessageBody() userId: string,
 	) {
+		const isOnline = this.onlineUsers.has(userId);
+		if (!isOnline) return { userId, status: "offline" };
+
+		const user = await this.usersService.findOne(userId);
+		if (!user?.showOnlineStatus) return { userId, status: "offline" };
+
 		return {
 			userId,
-			status: this.onlineUsers.has(userId) ? "online" : "offline",
+			status: "online",
 		};
 	}