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Injectable,
Logger,
OnModuleInit,
} from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository } from 'typeorm';
import * as webpush from 'web-push';
import { UserDevice, NotificationLog } from '../entities';
export interface PushPayload {
title: string;
body: string;
icon?: string;
badge?: string;
url?: string;
data?: Record<string, any>;
actions?: Array<{ action: string; title: string }>;
}
export interface SendResult {
deviceId: string;
success: boolean;
error?: string;
statusCode?: number;
}
@Injectable()
export class PushNotificationService implements OnModuleInit {
private readonly logger = new Logger(PushNotificationService.name);
private isConfigured = false;
constructor(
private readonly configService: ConfigService,
@InjectRepository(UserDevice)
private readonly deviceRepository: Repository<UserDevice>,
@InjectRepository(NotificationLog)
private readonly logRepository: Repository<NotificationLog>,
) {}
onModuleInit() {
const vapidPublicKey = this.configService.get<string>('VAPID_PUBLIC_KEY');
const vapidPrivateKey = this.configService.get<string>('VAPID_PRIVATE_KEY');
const vapidSubject = this.configService.get<string>(
'VAPID_SUBJECT',
'mailto:admin@example.com',
);
if (vapidPublicKey && vapidPrivateKey) {
try {
webpush.setVapidDetails(vapidSubject, vapidPublicKey, vapidPrivateKey);
this.isConfigured = true;
this.logger.log('Web Push configured with VAPID keys');
} catch (error) {
this.logger.error(`Failed to configure Web Push: ${error.message}`);
}
} else {
this.logger.warn(
'VAPID keys not configured. Push notifications will be disabled.',
);
}
}
isEnabled(): boolean {
return this.isConfigured;
}
getVapidPublicKey(): string | null {
if (!this.isConfigured) {
return null;
}
return this.configService.get<string>('VAPID_PUBLIC_KEY') || null;
}
async sendToUser(
userId: string,
tenantId: string,
payload: PushPayload,
notificationId?: string,
): Promise<SendResult[]> {
if (!this.isConfigured) {
this.logger.warn('Push notifications not configured, skipping send');
return [];
}
const devices = await this.deviceRepository.find({
where: { user_id: userId, tenant_id: tenantId, is_active: true },
});
if (devices.length === 0) {
this.logger.debug(`No active devices found for user ${userId}`);
return [];
}
const results: SendResult[] = [];
const pushPayload = JSON.stringify({
title: payload.title,
body: payload.body,
icon: payload.icon || '/icon-192.png',
badge: payload.badge || '/badge-72.png',
url: payload.url || '/',
data: payload.data,
actions: payload.actions || [
{ action: 'view', title: 'Ver' },
{ action: 'dismiss', title: 'Descartar' },
],
});
for (const device of devices) {
const result = await this.sendToDevice(
device,
pushPayload,
notificationId,
);
results.push(result);
}
const successCount = results.filter((r) => r.success).length;
this.logger.log(
`Push sent to user ${userId}: ${successCount}/${results.length} successful`,
);
return results;
}
async sendToDevice(
device: UserDevice,
payload: string,
notificationId?: string,
): Promise<SendResult> {
try {
const subscription = JSON.parse(device.device_token);
await webpush.sendNotification(subscription, payload);
// Update last used
device.last_used_at = new Date();
await this.deviceRepository.save(device);
// Log success
if (notificationId) {
await this.logRepository.save({
notification_id: notificationId,
channel: 'push',
status: 'sent',
provider: 'web-push',
device_id: device.id,
delivered_at: new Date(),
});
}
return {
deviceId: device.id,
success: true,
};
} catch (error) {
const statusCode = error.statusCode;
// Handle expired subscriptions
if (statusCode === 410 || statusCode === 404) {
this.logger.warn(
`Device ${device.id} subscription expired (${statusCode}), marking inactive`,
);
device.is_active = false;
await this.deviceRepository.save(device);
}
// Log failure
if (notificationId) {
await this.logRepository.save({
notification_id: notificationId,
channel: 'push',
status: 'failed',
provider: 'web-push',
device_id: device.id,
error_code: statusCode?.toString(),
error_message: error.message,
});
}
return {
deviceId: device.id,
success: false,
error: error.message,
statusCode,
};
}
}
async sendBroadcast(
tenantId: string,
payload: PushPayload,
): Promise<{ total: number; successful: number; failed: number }> {
if (!this.isConfigured) {
this.logger.warn('Push notifications not configured, skipping broadcast');
return { total: 0, successful: 0, failed: 0 };
}
const devices = await this.deviceRepository.find({
where: { tenant_id: tenantId, is_active: true },
});
const pushPayload = JSON.stringify({
title: payload.title,
body: payload.body,
icon: payload.icon || '/icon-192.png',
badge: payload.badge || '/badge-72.png',
url: payload.url || '/',
data: payload.data,
});
let successful = 0;
let failed = 0;
for (const device of devices) {
const result = await this.sendToDevice(device, pushPayload);
if (result.success) {
successful++;
} else {
failed++;
}
}
this.logger.log(
`Broadcast to tenant ${tenantId}: ${successful}/${devices.length} successful`,
);
return {
total: devices.length,
successful,
failed,
};
}
validateSubscription(subscriptionJson: string): boolean {
try {
const subscription = JSON.parse(subscriptionJson);
if (!subscription.endpoint) {
return false;
}
if (!subscription.keys?.p256dh || !subscription.keys?.auth) {
return false;
}
return true;
} catch {
return false;
}
}
}
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