@@ -177,6 +177,19 @@ export class NotificationsController {
|
|||||||
return { smsCount };
|
return { smsCount };
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@UseGuards(AdminAuthGuard)
|
||||||
|
@ApiBearerAuth()
|
||||||
|
@Post('admin/notifications/test-notis')
|
||||||
|
@ApiOperation({ summary: 'Send a test in-app notification (socket) to the current admin' })
|
||||||
|
async createTestNotis(@RestId() restaurantId: string, @AdminId() adminId: string) {
|
||||||
|
const notification = await this.notificationService.sendTestInAppNotification(adminId, restaurantId);
|
||||||
|
return {
|
||||||
|
message: 'Test in-app notification queued',
|
||||||
|
notification,
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
// super admin endpoints
|
// super admin endpoints
|
||||||
|
|
||||||
@UseGuards(SuperAdminAuthGuard)
|
@UseGuards(SuperAdminAuthGuard)
|
||||||
|
|||||||
@@ -37,10 +37,19 @@ export class NotificationsGateway implements OnGatewayConnection, OnGatewayDisco
|
|||||||
) {}
|
) {}
|
||||||
|
|
||||||
async handleConnection(client: Socket) {
|
async handleConnection(client: Socket) {
|
||||||
|
this.logger.log(
|
||||||
|
`[WS] connection attempt socketId=${client.id} transport=${client.conn.transport.name} ` +
|
||||||
|
`hasAuthToken=${Boolean(client.handshake.auth?.token || client.handshake.auth?.authorization)} ` +
|
||||||
|
`hasQueryToken=${Boolean(client.handshake.query?.token || client.handshake.query?.authorization)} ` +
|
||||||
|
`hasHeaderAuth=${Boolean(client.handshake.headers.authorization)}`,
|
||||||
|
);
|
||||||
|
|
||||||
try {
|
try {
|
||||||
await this.authenticateConnection(client);
|
await this.authenticateConnection(client);
|
||||||
const authenticatedClient = client as AuthenticatedSocket;
|
const authenticatedClient = client as AuthenticatedSocket;
|
||||||
this.logger.log(`Admin connected: ${authenticatedClient.adminId}`);
|
this.logger.log(
|
||||||
|
`[WS] connected socketId=${client.id} adminId=${authenticatedClient.adminId} restId=${authenticatedClient.restId}`,
|
||||||
|
);
|
||||||
this.handleJoinRoom(authenticatedClient);
|
this.handleJoinRoom(authenticatedClient);
|
||||||
|
|
||||||
// Start ping interval for this client
|
// Start ping interval for this client
|
||||||
@@ -51,7 +60,7 @@ export class NotificationsGateway implements OnGatewayConnection, OnGatewayDisco
|
|||||||
// this.pingIntervals.set(client.id, intervalId);
|
// this.pingIntervals.set(client.id, intervalId);
|
||||||
} catch (error) {
|
} catch (error) {
|
||||||
this.logger.error(
|
this.logger.error(
|
||||||
`Connection authentication failed: ${error instanceof Error ? error.message : 'Unknown error'}`,
|
`[WS] connection auth failed socketId=${client.id}: ${error instanceof Error ? error.message : 'Unknown error'}`,
|
||||||
);
|
);
|
||||||
void client.emit('error', { message: 'Authentication failed' });
|
void client.emit('error', { message: 'Authentication failed' });
|
||||||
client.disconnect();
|
client.disconnect();
|
||||||
@@ -59,8 +68,11 @@ export class NotificationsGateway implements OnGatewayConnection, OnGatewayDisco
|
|||||||
}
|
}
|
||||||
|
|
||||||
handleDisconnect(client: Socket) {
|
handleDisconnect(client: Socket) {
|
||||||
this.logger.log(`Client disconnected: ${client.id}`);
|
const authenticatedClient = client as AuthenticatedSocket;
|
||||||
this.handleLeaveRoom(client);
|
this.logger.log(
|
||||||
|
`[WS] disconnect socketId=${client.id} adminId=${authenticatedClient.adminId ?? 'n/a'} restId=${authenticatedClient.restId ?? 'n/a'}`,
|
||||||
|
);
|
||||||
|
this.handleLeaveRoom(authenticatedClient);
|
||||||
|
|
||||||
// Clear ping interval for this client
|
// Clear ping interval for this client
|
||||||
// const intervalId = this.pingIntervals.get(client.id);
|
// const intervalId = this.pingIntervals.get(client.id);
|
||||||
@@ -72,13 +84,41 @@ export class NotificationsGateway implements OnGatewayConnection, OnGatewayDisco
|
|||||||
|
|
||||||
sendInAppNotification(repipient: { adminId: string; restaurantId: string }, payload: IInAppNotificationPayload) {
|
sendInAppNotification(repipient: { adminId: string; restaurantId: string }, payload: IInAppNotificationPayload) {
|
||||||
const room = this.getRoom(repipient.adminId, repipient.restaurantId);
|
const room = this.getRoom(repipient.adminId, repipient.restaurantId);
|
||||||
|
const adapter = this.server.sockets?.adapter ?? this.server.adapter;
|
||||||
|
const socketsMap = this.server.sockets?.sockets ?? this.server.sockets;
|
||||||
|
const socketsInRoom = adapter?.rooms?.get(room);
|
||||||
|
const roomSize = socketsInRoom?.size ?? 0;
|
||||||
|
const connectedSocketIds =
|
||||||
|
socketsMap instanceof Map ? [...socketsMap.keys()] : [...(Object.keys(socketsMap ?? {}) as string[])];
|
||||||
|
const allRooms = adapter?.rooms ? [...adapter.rooms.keys()] : [];
|
||||||
|
|
||||||
|
this.logger.log(
|
||||||
|
`[WS] emit start room=${room} adminId=${repipient.adminId} restaurantId=${repipient.restaurantId} ` +
|
||||||
|
`notificationId=${payload.notificationId} subject=${payload.subject} roomSize=${roomSize} ` +
|
||||||
|
`namespaceConnected=${connectedSocketIds.length}`,
|
||||||
|
);
|
||||||
|
|
||||||
|
if (roomSize === 0) {
|
||||||
|
this.logger.warn(
|
||||||
|
`[WS] emit to EMPTY room=${room} — no client joined this room. ` +
|
||||||
|
`connectedSockets=[${connectedSocketIds.join(', ') || 'none'}] ` +
|
||||||
|
`allRooms=[${allRooms.join(', ') || 'none'}]`,
|
||||||
|
);
|
||||||
|
} else {
|
||||||
|
this.logger.log(`[WS] room members socketIds=[${[...(socketsInRoom ?? [])].join(', ')}]`);
|
||||||
|
}
|
||||||
|
|
||||||
this.logger.log(`Sending in app notification to admin: ${repipient.adminId}`);
|
|
||||||
this.server.to(room).emit('notifications', payload, async () => {
|
this.server.to(room).emit('notifications', payload, async () => {
|
||||||
|
this.logger.log(
|
||||||
|
`[WS] ACK received room=${room} notificationId=${payload.notificationId} (client acknowledged)`,
|
||||||
|
);
|
||||||
// 3. ACK (delivered)
|
// 3. ACK (delivered)
|
||||||
// await this.notificationService.markAsDelivered(payload.notificationId);
|
// await this.notificationService.markAsDelivered(payload.notificationId);
|
||||||
});
|
});
|
||||||
this.logger.log(`In app notification sent to admin: ${repipient.adminId}`);
|
|
||||||
|
this.logger.log(
|
||||||
|
`[WS] emit queued event=notifications room=${room} roomSize=${roomSize} notificationId=${payload.notificationId}`,
|
||||||
|
);
|
||||||
}
|
}
|
||||||
|
|
||||||
private getRoom(adminId: string, restaurantId: string) {
|
private getRoom(adminId: string, restaurantId: string) {
|
||||||
@@ -86,16 +126,30 @@ export class NotificationsGateway implements OnGatewayConnection, OnGatewayDisco
|
|||||||
}
|
}
|
||||||
|
|
||||||
handleLeaveRoom(client: AuthenticatedSocket) {
|
handleLeaveRoom(client: AuthenticatedSocket) {
|
||||||
const room = this.getRoom(client.adminId!, client.restId!);
|
if (!client.adminId || !client.restId) {
|
||||||
|
this.logger.warn(`[WS] leave skipped socketId=${client.id} — missing adminId/restId`);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
const room = this.getRoom(client.adminId, client.restId);
|
||||||
void client.leave(room);
|
void client.leave(room);
|
||||||
this.logger.log(`Admin ${client.adminId} (Client ${client.id}) left room: ${room}`);
|
this.logger.log(`[WS] left room=${room} adminId=${client.adminId} socketId=${client.id}`);
|
||||||
void client.emit('left', { room, message: 'Successfully Admin left room' });
|
void client.emit('left', { room, message: 'Successfully Admin left room' });
|
||||||
}
|
}
|
||||||
|
|
||||||
handleJoinRoom(client: AuthenticatedSocket) {
|
handleJoinRoom(client: AuthenticatedSocket) {
|
||||||
const room = this.getRoom(client.adminId!, client.restId!);
|
if (!client.adminId || !client.restId) {
|
||||||
|
this.logger.warn(`[WS] join skipped socketId=${client.id} — missing adminId/restId`);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
const room = this.getRoom(client.adminId, client.restId);
|
||||||
void client.join(room);
|
void client.join(room);
|
||||||
this.logger.log(`Admin ${client.adminId} (Client ${client.id}) joined room: ${room}`);
|
const adapter = this.server.sockets?.adapter ?? this.server.adapter;
|
||||||
|
const roomSize = adapter?.rooms?.get(room)?.size ?? 0;
|
||||||
|
this.logger.log(
|
||||||
|
`[WS] joined room=${room} adminId=${client.adminId} restId=${client.restId} socketId=${client.id} roomSize=${roomSize}`,
|
||||||
|
);
|
||||||
void client.emit('joined', { room, message: 'Successfully Admin joined room' });
|
void client.emit('joined', { room, message: 'Successfully Admin joined room' });
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|||||||
@@ -2,9 +2,7 @@ import { Processor, WorkerHost, OnWorkerEvent } from '@nestjs/bullmq';
|
|||||||
import { Logger } from '@nestjs/common';
|
import { Logger } from '@nestjs/common';
|
||||||
import { Job } from 'bullmq';
|
import { Job } from 'bullmq';
|
||||||
import { CreateRequestContext } from '@mikro-orm/core';
|
import { CreateRequestContext } from '@mikro-orm/core';
|
||||||
import { InjectRepository } from '@mikro-orm/nestjs';
|
|
||||||
import { EntityManager } from '@mikro-orm/postgresql';
|
import { EntityManager } from '@mikro-orm/postgresql';
|
||||||
import { Notification } from '../entities/notification.entity';
|
|
||||||
import { InAppNotificationQueueJob } from '../interfaces/jobs-queue.interface';
|
import { InAppNotificationQueueJob } from '../interfaces/jobs-queue.interface';
|
||||||
import { NotificationQueueNameEnum } from '../constants/queue';
|
import { NotificationQueueNameEnum } from '../constants/queue';
|
||||||
import { NotificationsGateway } from '../notifications.gateway';
|
import { NotificationsGateway } from '../notifications.gateway';
|
||||||
@@ -14,7 +12,6 @@ export class InAppProcessor extends WorkerHost {
|
|||||||
private readonly logger = new Logger(InAppProcessor.name);
|
private readonly logger = new Logger(InAppProcessor.name);
|
||||||
|
|
||||||
constructor(
|
constructor(
|
||||||
@InjectRepository(Notification)
|
|
||||||
private readonly em: EntityManager,
|
private readonly em: EntityManager,
|
||||||
private readonly notificationsGateway: NotificationsGateway,
|
private readonly notificationsGateway: NotificationsGateway,
|
||||||
) {
|
) {
|
||||||
@@ -25,10 +22,18 @@ export class InAppProcessor extends WorkerHost {
|
|||||||
async process(job: Job<InAppNotificationQueueJob>): Promise<void> {
|
async process(job: Job<InAppNotificationQueueJob>): Promise<void> {
|
||||||
const { recipient, subject, body, notificationId } = job.data;
|
const { recipient, subject, body, notificationId } = job.data;
|
||||||
|
|
||||||
this.logger.log(`Processing InApp notification - Recipient: ${JSON.stringify(recipient)}, subject: ${subject}`);
|
this.logger.log(
|
||||||
|
`[InAppProcessor] processing jobId=${job.id} attempt=${job.attemptsMade + 1} ` +
|
||||||
|
`recipient=${JSON.stringify(recipient)} subject=${subject} notificationId=${notificationId}`,
|
||||||
|
);
|
||||||
|
|
||||||
if (!recipient.adminId) {
|
if (!recipient?.adminId) {
|
||||||
this.logger.warn(`Skipping in-app notification job ${job.id}: missing adminId`);
|
this.logger.warn(`[InAppProcessor] skipping job ${job.id}: missing adminId`);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!recipient.restaurantId) {
|
||||||
|
this.logger.warn(`[InAppProcessor] skipping job ${job.id}: missing restaurantId`);
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
@@ -38,20 +43,30 @@ export class InAppProcessor extends WorkerHost {
|
|||||||
{ subject, body, notificationId },
|
{ subject, body, notificationId },
|
||||||
);
|
);
|
||||||
|
|
||||||
this.logger.log(`InApp notification sent successfully to ${recipient.adminId}`);
|
this.logger.log(
|
||||||
|
`[InAppProcessor] gateway emit done for admin=${recipient.adminId} restaurant=${recipient.restaurantId}`,
|
||||||
|
);
|
||||||
} catch (error) {
|
} catch (error) {
|
||||||
this.logger.error(`Error processing InApp notification job ${job.id}:`, error);
|
this.logger.error(`[InAppProcessor] error processing job ${job.id}:`, error);
|
||||||
throw error;
|
throw error;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@OnWorkerEvent('active')
|
||||||
|
onActive(job: Job) {
|
||||||
|
this.logger.log(`[InAppProcessor] job ${job.id} became active`);
|
||||||
|
}
|
||||||
|
|
||||||
@OnWorkerEvent('completed')
|
@OnWorkerEvent('completed')
|
||||||
onCompleted(job: Job) {
|
onCompleted(job: Job) {
|
||||||
this.logger.log(`Notification job ${job.id} completed`);
|
this.logger.log(`[InAppProcessor] job ${job.id} completed`);
|
||||||
}
|
}
|
||||||
|
|
||||||
@OnWorkerEvent('failed')
|
@OnWorkerEvent('failed')
|
||||||
onFailed(job: Job, error: Error) {
|
onFailed(job: Job, error: Error) {
|
||||||
this.logger.error(`Notification job ${job.id} failed:`, error);
|
this.logger.error(
|
||||||
|
`[InAppProcessor] job ${job.id} failed after ${job.attemptsMade} attempt(s): ${error.message}`,
|
||||||
|
error.stack,
|
||||||
|
);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|||||||
@@ -119,6 +119,12 @@ export class NotificationQueueService {
|
|||||||
}
|
}
|
||||||
async addBulkInAppNotifications(jobs: InAppNotificationQueueJob[]): Promise<void> {
|
async addBulkInAppNotifications(jobs: InAppNotificationQueueJob[]): Promise<void> {
|
||||||
try {
|
try {
|
||||||
|
this.logger.log(
|
||||||
|
`[addBulkInAppNotifications] queueing ${jobs.length} job(s): ${jobs
|
||||||
|
.map(j => `admin=${j.recipient.adminId} rest=${j.recipient.restaurantId} notif=${j.notificationId}`)
|
||||||
|
.join(' | ')}`,
|
||||||
|
);
|
||||||
|
|
||||||
const queueJobs = jobs.map(job => ({
|
const queueJobs = jobs.map(job => ({
|
||||||
name: 'in-app-notification',
|
name: 'in-app-notification',
|
||||||
data: job,
|
data: job,
|
||||||
@@ -132,10 +138,12 @@ export class NotificationQueueService {
|
|||||||
},
|
},
|
||||||
}));
|
}));
|
||||||
|
|
||||||
await this.inAppQueue.addBulk(queueJobs);
|
const added = await this.inAppQueue.addBulk(queueJobs);
|
||||||
this.logger.log(`Added ${jobs.length} InApp notification jobs to queue`);
|
this.logger.log(
|
||||||
|
`[addBulkInAppNotifications] added ${added.length} job(s) to queue "${NotificationQueueNameEnum.IN_APP}": ids=${added.map(j => j.id).join(', ')}`,
|
||||||
|
);
|
||||||
} catch (error) {
|
} catch (error) {
|
||||||
this.logger.error(`Failed to add bulk notifications to queue:`, error);
|
this.logger.error(`[addBulkInAppNotifications] failed to add jobs to queue:`, error);
|
||||||
throw error;
|
throw error;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|||||||
@@ -24,6 +24,11 @@ export class NotificationService {
|
|||||||
async sendNotification(params: NotifRequest): Promise<Notification[]> {
|
async sendNotification(params: NotifRequest): Promise<Notification[]> {
|
||||||
const { recipients, message, metadata, restaurantId } = params;
|
const { recipients, message, metadata, restaurantId } = params;
|
||||||
|
|
||||||
|
this.logger.log(
|
||||||
|
`[sendNotification] start restaurant=${restaurantId} title=${message.title} recipients=${recipients.length} ` +
|
||||||
|
`admins=${recipients.filter(r => 'adminId' in r).length} users=${recipients.filter(r => 'userId' in r).length}`,
|
||||||
|
);
|
||||||
|
|
||||||
// create Database notifications
|
// create Database notifications
|
||||||
const notifications = await this.createAdminBulkNotifications(
|
const notifications = await this.createAdminBulkNotifications(
|
||||||
recipients.map(recipient => ({
|
recipients.map(recipient => ({
|
||||||
@@ -35,18 +40,35 @@ export class NotificationService {
|
|||||||
})),
|
})),
|
||||||
);
|
);
|
||||||
|
|
||||||
|
this.logger.log(`[sendNotification] created ${notifications.length} DB notification(s)`);
|
||||||
|
|
||||||
// get admin prefrences
|
// get admin prefrences
|
||||||
const preference = await this.preferenceService.findByRestaurantAndType(restaurantId, message.title);
|
const preference = await this.preferenceService.findByRestaurantAndType(restaurantId, message.title);
|
||||||
|
|
||||||
if (preference?.channels?.length === 0) {
|
this.logger.log(
|
||||||
|
`[sendNotification] preference=${preference ? `id=${preference.id} channels=${JSON.stringify(preference.channels)}` : 'NOT FOUND'}`,
|
||||||
|
);
|
||||||
|
|
||||||
|
if (!preference) {
|
||||||
|
this.logger.warn(
|
||||||
|
`[sendNotification] skipping channels — no preference for restaurant ${restaurantId}, title ${message.title}`,
|
||||||
|
);
|
||||||
|
return notifications;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (preference.channels?.length === 0) {
|
||||||
this.logger.warn(`Notification type is NONE for restaurant ${restaurantId}, title ${message.title}`);
|
this.logger.warn(`Notification type is NONE for restaurant ${restaurantId}, title ${message.title}`);
|
||||||
return notifications;
|
return notifications;
|
||||||
}
|
}
|
||||||
|
|
||||||
// send in app notification (admins only — user records must not emit to admin socket rooms)
|
// send in app notification (admins only — user records must not emit to admin socket rooms)
|
||||||
if (preference?.channels?.includes(NotifChannelEnum.IN_APP)) {
|
if (preference.channels?.includes(NotifChannelEnum.IN_APP)) {
|
||||||
|
this.logger.log(`[sendNotification] IN_APP channel enabled, building jobs`);
|
||||||
const inAppJobs = recipients.flatMap((recipient, index) => {
|
const inAppJobs = recipients.flatMap((recipient, index) => {
|
||||||
if (!('adminId' in recipient) || !recipient.adminId) {
|
if (!('adminId' in recipient) || !recipient.adminId) {
|
||||||
|
this.logger.debug(
|
||||||
|
`[sendNotification] skipping recipient index=${index} (not admin): ${JSON.stringify(recipient)}`,
|
||||||
|
);
|
||||||
return [];
|
return [];
|
||||||
}
|
}
|
||||||
|
|
||||||
@@ -61,16 +83,23 @@ export class NotificationService {
|
|||||||
});
|
});
|
||||||
|
|
||||||
if (inAppJobs.length > 0) {
|
if (inAppJobs.length > 0) {
|
||||||
|
this.logger.log(
|
||||||
|
`[sendNotification] queueing ${inAppJobs.length} in-app job(s): ${inAppJobs.map(j => j.recipient.adminId).join(', ')}`,
|
||||||
|
);
|
||||||
await this.queueService.addBulkInAppNotifications(inAppJobs);
|
await this.queueService.addBulkInAppNotifications(inAppJobs);
|
||||||
} else {
|
} else {
|
||||||
this.logger.warn(
|
this.logger.warn(
|
||||||
`No admin recipients for in-app notification: restaurant ${restaurantId}, title ${message.title}`,
|
`No admin recipients for in-app notification: restaurant ${restaurantId}, title ${message.title}`,
|
||||||
);
|
);
|
||||||
}
|
}
|
||||||
|
} else {
|
||||||
|
this.logger.warn(
|
||||||
|
`[sendNotification] IN_APP channel NOT enabled for restaurant ${restaurantId}, title ${message.title}, channels=${JSON.stringify(preference.channels)}`,
|
||||||
|
);
|
||||||
}
|
}
|
||||||
|
|
||||||
// add sms notifications to queue
|
// add sms notifications to queue
|
||||||
if (preference?.channels?.includes(NotifChannelEnum.SMS)) {
|
if (preference.channels?.includes(NotifChannelEnum.SMS)) {
|
||||||
await this.queueService.addBulkSmsNotifications(
|
await this.queueService.addBulkSmsNotifications(
|
||||||
recipients.map(recipient => ({
|
recipients.map(recipient => ({
|
||||||
recipient,
|
recipient,
|
||||||
@@ -293,4 +322,40 @@ export class NotificationService {
|
|||||||
async getSmsCountByRestaurantId(restaurantId: string): Promise<number> {
|
async getSmsCountByRestaurantId(restaurantId: string): Promise<number> {
|
||||||
return this.smsLogRepository.getSmsCountByRestaurantId(restaurantId);
|
return this.smsLogRepository.getSmsCountByRestaurantId(restaurantId);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
async sendTestInAppNotification(adminId: string, restaurantId: string): Promise<Notification> {
|
||||||
|
const title = NotifTitleEnum.ORDER_CREATED;
|
||||||
|
const content = 'Test in-app notification';
|
||||||
|
|
||||||
|
this.logger.log(`[sendTestInAppNotification] start adminId=${adminId} restaurantId=${restaurantId}`);
|
||||||
|
|
||||||
|
const [notification] = await this.createAdminBulkNotifications([
|
||||||
|
{
|
||||||
|
restaurantId,
|
||||||
|
title,
|
||||||
|
content,
|
||||||
|
adminId,
|
||||||
|
userId: null,
|
||||||
|
},
|
||||||
|
]);
|
||||||
|
|
||||||
|
this.logger.log(
|
||||||
|
`[sendTestInAppNotification] created notification id=${notification.id}, queueing in-app job`,
|
||||||
|
);
|
||||||
|
|
||||||
|
await this.queueService.addBulkInAppNotifications([
|
||||||
|
{
|
||||||
|
recipient: { adminId, restaurantId },
|
||||||
|
subject: title,
|
||||||
|
body: content,
|
||||||
|
notificationId: notification.id,
|
||||||
|
},
|
||||||
|
]);
|
||||||
|
|
||||||
|
this.logger.log(
|
||||||
|
`[sendTestInAppNotification] queued successfully admin=${adminId} restaurant=${restaurantId} notificationId=${notification.id}`,
|
||||||
|
);
|
||||||
|
|
||||||
|
return notification;
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|||||||
Reference in New Issue
Block a user