feat: implement money request notification system

- Added MoneyRequestNotificationListener to handle notifications for money request events (created, approved, declined).
- Introduced new notification event constants for money requests.
- Updated notification interfaces to include money request event payloads.
- Enhanced existing notification system to support money request notifications, notifying parents and children appropriately.
- Updated device service to support finding devices by ID for improved functionality.

src/auth/services/auth.service.ts

@@ -314,33 +314,54 @@ export class AuthService {
 
   /**
    * Register or update device with FCM token
-   * This method handles both new device registration and existing device updates
+   * This method handles:
+   * 1. Device already exists for this user → Update FCM token
+   * 2. Device exists for different user → Transfer device to new user
+   * 3. Device doesn't exist → Create new device
    */
   private async registerDeviceToken(userId: string, deviceId: string, fcmToken: string): Promise<void> {
     try {
       this.logger.log(`Registering/updating device ${deviceId} with FCM token for user ${userId}`);
 
-      // Check if device already exists for this user
-      const existingDevice = await this.deviceService.findUserDeviceById(deviceId, userId);
+      // Step 1: Check if device already exists for this user
+      const existingDeviceForUser = await this.deviceService.findUserDeviceById(deviceId, userId);
 
-      if (existingDevice) {
-        // Update existing device with new FCM token and last access time
+      if (existingDeviceForUser) {
+        // Device exists for this user → Update FCM token and last access time
         await this.deviceService.updateDevice(deviceId, {
           fcmToken,
           userId,
           lastAccessOn: new Date(),
         });
         this.logger.log(`Device ${deviceId} updated with new FCM token for user ${userId}`);
-      } else {
-        // Create new device
-        await this.deviceService.createDevice({
-          deviceId,
+        return;
+      }
+
+      // Step 2: Check if device exists for any user (different user scenario)
+      const existingDevice = await this.deviceService.findByDeviceId(deviceId);
+
+      if (existingDevice) {
+        // Device exists for different user → Transfer device to new user
+        this.logger.log(
+          `Device ${deviceId} exists for user ${existingDevice.userId}, transferring to user ${userId}`
+        );
+        await this.deviceService.updateDevice(deviceId, {
           userId,
           fcmToken,
           lastAccessOn: new Date(),
         });
-        this.logger.log(`New device ${deviceId} registered with FCM token for user ${userId}`);
+        this.logger.log(`Device ${deviceId} transferred from user ${existingDevice.userId} to user ${userId}`);
+        return;
       }
+
+      // Step 3: Device doesn't exist → Create new device
+      await this.deviceService.createDevice({
+        deviceId,
+        userId,
+        fcmToken,
+        lastAccessOn: new Date(),
+      });
+      this.logger.log(`New device ${deviceId} registered with FCM token for user ${userId}`);
     } catch (error) {
       // Log error but don't fail the login/signup process
       const errorMessage = error instanceof Error ? error.message : String(error);

src/common/modules/notification/constants/event-names.constant.ts

@@ -5,6 +5,11 @@
 export const NOTIFICATION_EVENTS = {
   // Transaction events
   TRANSACTION_CREATED: 'notification.transaction.created',
+  
+  // Money Request events
+  MONEY_REQUEST_CREATED: 'notification.money-request.created',
+  MONEY_REQUEST_APPROVED: 'notification.money-request.approved',
+  MONEY_REQUEST_DECLINED: 'notification.money-request.declined',
 } as const;
 
 export type NotificationEventName = 

src/common/modules/notification/enums/notification-scope.enum.ts

@@ -13,6 +13,11 @@ export enum NotificationScope {
   // Transaction notifications - Spending
   CHILD_SPENDING = 'CHILD_SPENDING',
   PARENT_SPENDING_ALERT = 'PARENT_SPENDING_ALERT',
+
+  // Money Request notifications
+  MONEY_REQUEST_CREATED = 'MONEY_REQUEST_CREATED',
+  MONEY_REQUEST_APPROVED = 'MONEY_REQUEST_APPROVED',
+  MONEY_REQUEST_DECLINED = 'MONEY_REQUEST_DECLINED',
 }
 
 /**

src/common/modules/notification/interfaces/notification-events.interface.ts

@@ -1,5 +1,6 @@
 import { Transaction } from '~/card/entities/transaction.entity';
 import { Card } from '~/card/entities/card.entity';
+import { MoneyRequest } from '~/money-request/entities/money-request.entity';
 
 /**
  * Event payload for when a transaction is created
@@ -22,3 +23,41 @@ export interface ITransactionCreatedEvent {
   timestamp: Date;
 }
 
+/**
+ * Event payload for when a money request is created
+ * Used to notify parents when their child requests money
+ */
+export interface IMoneyRequestCreatedEvent {
+  /** The money request that was created */
+  moneyRequest: MoneyRequest;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when a money request is approved
+ * Used to notify children when their money request is approved
+ */
+export interface IMoneyRequestApprovedEvent {
+  /** The money request that was approved */
+  moneyRequest: MoneyRequest;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when a money request is declined
+ * Used to notify children when their money request is declined
+ */
+export interface IMoneyRequestDeclinedEvent {
+  /** The money request that was declined */
+  moneyRequest: MoneyRequest;
+  
+  /** Rejection reason provided by parent */
+  rejectionReason?: string;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}

src/common/modules/notification/listeners/index.ts

@@ -1,2 +1,3 @@
 export * from './notification-created.listener';
 export * from './transaction-notification.listener';
+export * from './money-request-notification.listener';

src/common/modules/notification/listeners/money-request-notification.listener.ts

@@ -0,0 +1,264 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { OnEvent } from '@nestjs/event-emitter';
+import { NotificationFactory, NotificationPreferences } from '../services/notification-factory.service';
+import { UserService } from '~/user/services/user.service';
+import { NOTIFICATION_EVENTS } from '../constants/event-names.constant';
+import {
+  IMoneyRequestApprovedEvent,
+  IMoneyRequestCreatedEvent,
+  IMoneyRequestDeclinedEvent,
+} from '../interfaces/notification-events.interface';
+import { NotificationScope } from '../enums/notification-scope.enum';
+import { User } from '~/user/entities';
+
+/**
+ * MoneyRequestNotificationListener
+ * 
+ * Handles notifications for money request events.
+ * Notifies parents when children request money, and children when requests are approved/declined.
+ * 
+ * Responsibilities:
+ * - Listen for money request events (created, approved, declined)
+ * - Determine notification recipients (parent or child)
+ * - Construct appropriate messages
+ * - Fetch user preferences
+ * - Call NotificationFactory to send
+ */
+@Injectable()
+export class MoneyRequestNotificationListener {
+  private readonly logger = new Logger(MoneyRequestNotificationListener.name);
+
+  constructor(
+    private readonly notificationFactory: NotificationFactory,
+    private readonly userService: UserService,
+  ) {}
+
+  /**
+   * Handle money request created event
+   * Notifies parent when child requests money
+   */
+  @OnEvent(NOTIFICATION_EVENTS.MONEY_REQUEST_CREATED)
+  async handleMoneyRequestCreated(event: IMoneyRequestCreatedEvent): Promise<void> {
+    try {
+      const { moneyRequest } = event;
+
+      this.logger.log(
+        `Processing money request notification for request ${moneyRequest.id} - ` +
+        `Amount: $${moneyRequest.amount}, Reason: ${moneyRequest.reason}`
+      );
+
+      await this.notifyParentOfMoneyRequest(moneyRequest);
+
+      this.logger.log(
+        `Money request notification processed successfully for request ${moneyRequest.id}`
+      );
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process money request notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Handle money request approved event
+   * Notifies child when their money request is approved
+   */
+  @OnEvent(NOTIFICATION_EVENTS.MONEY_REQUEST_APPROVED)
+  async handleMoneyRequestApproved(event: IMoneyRequestApprovedEvent): Promise<void> {
+    try {
+      const { moneyRequest } = event;
+
+      this.logger.log(
+        `Processing money request approved notification for request ${moneyRequest.id}`
+      );
+
+      await this.notifyChildOfApproval(moneyRequest);
+
+      this.logger.log(
+        `Money request approved notification processed successfully for request ${moneyRequest.id}`
+      );
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process money request approved notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Handle money request declined event
+   * Notifies child when their money request is declined
+   */
+  @OnEvent(NOTIFICATION_EVENTS.MONEY_REQUEST_DECLINED)
+  async handleMoneyRequestDeclined(event: IMoneyRequestDeclinedEvent): Promise<void> {
+    try {
+      const { moneyRequest, rejectionReason } = event;
+
+      this.logger.log(
+        `Processing money request declined notification for request ${moneyRequest.id}`
+      );
+
+      await this.notifyChildOfRejection(moneyRequest, rejectionReason);
+
+      this.logger.log(
+        `Money request declined notification processed successfully for request ${moneyRequest.id}`
+      );
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process money request declined notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify parent when child requests money
+   */
+  private async notifyParentOfMoneyRequest(moneyRequest: any): Promise<void> {
+    try {
+      const guardian = moneyRequest?.guardian;
+      const parentUser = guardian?.customer?.user;
+      
+      if (!parentUser) {
+        this.logger.warn(`No parent user found for money request ${moneyRequest.id}, skipping notification`);
+        return;
+      }
+
+      const child = moneyRequest?.junior;
+      const childUser = child?.customer?.user;
+      const childName = childUser?.firstName || 'Your child';
+      const amount = moneyRequest.amount;
+      const reason = moneyRequest.reason || 'No reason provided';
+
+      this.logger.debug(
+        `Notifying parent (user ${parentUser.id}): ${childName} requested $${amount} - ${reason}`
+      );
+
+      await this.notificationFactory.send({
+        userId: parentUser.id,
+        title: 'Money Request',
+        message: `${childName} requested $${amount.toFixed(2)}. Reason: ${reason}`,
+        scope: NotificationScope.MONEY_REQUEST_CREATED,
+        preferences: this.getUserPreferences(parentUser),
+        data: {
+          moneyRequestId: moneyRequest.id,
+          childId: childUser?.id,
+          childName: childName,
+          amount: amount.toString(),
+          reason: reason,
+          timestamp: moneyRequest.createdAt.toISOString(),
+          type: 'MONEY_REQUEST',
+          action: 'VIEW_MONEY_REQUEST',
+        },
+      });
+
+      this.logger.log(`✅ Notified parent ${parentUser.id} about money request ${moneyRequest.id}`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify parent of money request: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify child when their money request is approved
+   */
+  private async notifyChildOfApproval(moneyRequest: any): Promise<void> {
+    try {
+      const child = moneyRequest?.junior;
+      const childUser = child?.customer?.user;
+      
+      if (!childUser) {
+        this.logger.warn(`No child user found for money request ${moneyRequest.id}, skipping notification`);
+        return;
+      }
+
+      const amount = moneyRequest.amount;
+
+      this.logger.debug(
+        `Notifying child (user ${childUser.id}): Money request of $${amount} was approved`
+      );
+
+      await this.notificationFactory.send({
+        userId: childUser.id,
+        title: 'Money Request Approved',
+        message: `Your request for $${amount.toFixed(2)} has been approved. The money has been added to your account.`,
+        scope: NotificationScope.MONEY_REQUEST_APPROVED,
+        preferences: this.getUserPreferences(childUser),
+        data: {
+          moneyRequestId: moneyRequest.id,
+          amount: amount.toString(),
+          timestamp: moneyRequest.updatedAt.toISOString(),
+          type: 'MONEY_REQUEST_APPROVED',
+          action: 'VIEW_MONEY_REQUEST',
+        },
+      });
+
+      this.logger.log(`✅ Notified child ${childUser.id} about approved money request ${moneyRequest.id}`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify child of approval: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify child when their money request is declined
+   */
+  private async notifyChildOfRejection(moneyRequest: any, rejectionReason?: string): Promise<void> {
+    try {
+      const child = moneyRequest?.junior;
+      const childUser = child?.customer?.user;
+      
+      if (!childUser) {
+        this.logger.warn(`No child user found for money request ${moneyRequest.id}, skipping notification`);
+        return;
+      }
+
+      const amount = moneyRequest.amount;
+      const reason = rejectionReason || 'No reason provided';
+
+      this.logger.debug(
+        `Notifying child (user ${childUser.id}): Money request of $${amount} was declined`
+      );
+
+      await this.notificationFactory.send({
+        userId: childUser.id,
+        title: 'Money Request Declined',
+        message: `Your request for $${amount.toFixed(2)} has been declined. Reason: ${reason}`,
+        scope: NotificationScope.MONEY_REQUEST_DECLINED,
+        preferences: this.getUserPreferences(childUser),
+        data: {
+          moneyRequestId: moneyRequest.id,
+          amount: amount.toString(),
+          rejectionReason: reason,
+          timestamp: moneyRequest.updatedAt.toISOString(),
+          type: 'MONEY_REQUEST_DECLINED',
+          action: 'VIEW_MONEY_REQUEST',
+        },
+      });
+
+      this.logger.log(`✅ Notified child ${childUser.id} about declined money request ${moneyRequest.id}`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify child of rejection: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Extract user preferences from User entity
+   * Converts User properties to NotificationPreferences interface
+   */
+  private getUserPreferences(user: User): NotificationPreferences {
+    return {
+      isPushEnabled: user.isPushEnabled,
+      isEmailEnabled: user.isEmailEnabled,
+      isSmsEnabled: user.isSmsEnabled,
+    };
+  }
+}

src/common/modules/notification/listeners/transaction-notification.listener.ts

@@ -1,5 +1,6 @@
 import { Injectable, Logger } from '@nestjs/common';
 import { OnEvent } from '@nestjs/event-emitter';
+import { I18nService } from 'nestjs-i18n';
 import { NotificationFactory, NotificationPreferences } from '../services/notification-factory.service';
 import { UserService } from '~/user/services/user.service';
 import { NOTIFICATION_EVENTS } from '../constants/event-names.constant';
@@ -8,6 +9,7 @@ import { NotificationScope } from '../enums/notification-scope.enum';
 import { Transaction } from '~/card/entities/transaction.entity';
 import { Card } from '~/card/entities/card.entity';
 import { User } from '~/user/entities';
+import { UserLocale } from '~/core/enums/user-locale.enum';
 
 /**
  * TransactionNotificationListener
@@ -29,6 +31,7 @@ export class TransactionNotificationListener {
   constructor(
     private readonly notificationFactory: NotificationFactory,
     private readonly userService: UserService,
+    private readonly i18n: I18nService,
   ) {}
 
   /**
@@ -87,18 +90,28 @@ export class TransactionNotificationListener {
         ? NotificationScope.CHILD_TOP_UP
         : NotificationScope.CHILD_SPENDING;
 
-      const title = isTopUp ? 'Card Topped Up' : 'Purchase Successful';
-
+      const locale = this.getUserLocale(user);
       const amount = transaction.transactionAmount;
       const merchant = transaction.merchantName || 'merchant';
       const balance = card.account?.balance || 0;
+      const currency = card.account?.currency || transaction.transactionCurrency || 'SAR';
+
+      const title = isTopUp
+        ? this.i18n.t('app.NOTIFICATION.CHILD_TOP_UP_TITLE', { lang: locale })
+        : this.i18n.t('app.NOTIFICATION.CHILD_SPENDING_TITLE', { lang: locale });
 
       const message = isTopUp
-        ? `Your card has been topped up with $${amount.toFixed(2)}`
-        : `You spent $${amount.toFixed(2)} at ${merchant}. Balance: $${balance.toFixed(2)}`;
+        ? this.i18n.t('app.NOTIFICATION.CHILD_TOP_UP_MESSAGE', {
+            lang: locale,
+            args: { amount: amount.toString(), currency, balance: balance.toString() },
+          })
+        : this.i18n.t('app.NOTIFICATION.CHILD_SPENDING_MESSAGE', {
+            lang: locale,
+            args: { amount: amount.toString(), currency, merchant, balance: balance.toString() },
+          });
 
       this.logger.debug(
-        `Notifying transaction owner (user ${user.id}) - Amount: $${amount}, Merchant: ${merchant}`
+        `Notifying transaction owner (user ${user.id}) - Amount: ${amount} ${currency}, Merchant: ${merchant}`
       );
 
       await this.notificationFactory.send({
@@ -110,6 +123,7 @@ export class TransactionNotificationListener {
         data: {
           transactionId: transaction.id,
           amount: amount.toString(),
+          currency: currency,
           merchant: merchant,
           merchantCategory: transaction.merchantCategoryCode || 'OTHER',
           balance: balance.toString(),
@@ -145,18 +159,28 @@ export class TransactionNotificationListener {
       }
 
       const childUser = customer.user;
-      const childName = childUser?.firstName || 'Your child';
+      const locale = this.getUserLocale(parentUser);
+      const defaultChildName = this.i18n.t('app.NOTIFICATION.YOUR_CHILD', { lang: locale });
+      const childName = childUser?.firstName || defaultChildName;
       const amount = transaction.transactionAmount;
       const merchant = transaction.merchantName || 'a merchant';
+      const balance = card.account?.balance || 0;
+      const currency = card.account?.currency || transaction.transactionCurrency || 'SAR';
 
       this.logger.debug(
-        `Notifying parent (user ${parentUser.id}): ${childName} spent $${amount} at ${merchant}`
+        `Notifying parent (user ${parentUser.id}): ${childName} spent ${amount} ${currency} at ${merchant}`
       );
 
+      const title = this.i18n.t('app.NOTIFICATION.PARENT_SPENDING_TITLE', { lang: locale });
+      const message = this.i18n.t('app.NOTIFICATION.PARENT_SPENDING_MESSAGE', {
+        lang: locale,
+        args: { childName, amount: amount.toString(), currency, merchant, balance: balance.toString() },
+      });
+
       await this.notificationFactory.send({
         userId: parentUser.id,
-        title: 'Child Spending Alert',
-        message: `${childName} spent $${amount.toFixed(2)} at ${merchant}`,
+        title,
+        message,
         scope: NotificationScope.PARENT_SPENDING_ALERT,
         preferences: this.getUserPreferences(parentUser),
         data: {
@@ -164,8 +188,10 @@ export class TransactionNotificationListener {
           childId: childUser.id,
           childName: childName,
           amount: amount.toString(),
+          currency: currency,
           merchant: merchant,
           merchantCategory: transaction.merchantCategoryCode || 'OTHER',
+          balance: balance.toString(),
           timestamp: transaction.transactionDate.toISOString(),
           type: 'CHILD_SPENDING',
           action: 'OPEN_TRANSACTION',
@@ -198,18 +224,27 @@ export class TransactionNotificationListener {
       }
 
       const childUser = customer.user;
-      const childName = childUser?.firstName || 'Your child';
+      const locale = this.getUserLocale(parentUser);
+      const defaultChildName = this.i18n.t('app.NOTIFICATION.YOUR_CHILD', { lang: locale });
+      const childName = childUser?.firstName || defaultChildName;
       const amount = transaction.transactionAmount;
       const balance = card.account?.balance || 0;
+      const currency = card.account?.currency || transaction.transactionCurrency || 'SAR';
 
       this.logger.debug(
-        `Notifying parent (user ${parentUser.id}): Topped up ${childName}'s card with $${amount}`
+        `Notifying parent (user ${parentUser.id}): Transferred ${amount} ${currency} to ${childName}`
       );
 
+      const title = this.i18n.t('app.NOTIFICATION.PARENT_TOP_UP_TITLE', { lang: locale });
+      const message = this.i18n.t('app.NOTIFICATION.PARENT_TOP_UP_MESSAGE', {
+        lang: locale,
+        args: { amount: amount.toString(), currency, childName, balance: balance.toString() },
+      });
+
       await this.notificationFactory.send({
         userId: parentUser.id,
-        title: 'Top-Up Confirmation',
-        message: `You topped up ${childName}'s card with $${amount.toFixed(2)}. New balance: $${balance.toFixed(2)}`,
+        title,
+        message,
         scope: NotificationScope.PARENT_TOP_UP_CONFIRMATION,
         preferences: this.getUserPreferences(parentUser),
         data: {
@@ -217,6 +252,7 @@ export class TransactionNotificationListener {
           childId: childUser.id,
           childName: childName,
           amount: amount.toString(),
+          currency: currency,
           balance: balance.toString(),
           timestamp: transaction.transactionDate.toISOString(),
           type: 'TOP_UP',
@@ -244,6 +280,17 @@ export class TransactionNotificationListener {
       isSmsEnabled: user.isSmsEnabled,
     };
   }
+
+  /**
+   * Get user locale for i18n translations
+   * Defaults to English if not specified
+   * TODO: Add locale field to User entity in the future
+   */
+  private getUserLocale(user: User): UserLocale {
+    // For now, default to English
+    // In the future, this can read from user.locale or user.preferences.locale
+    return UserLocale.ENGLISH;
+  }
 }
 
 

src/common/modules/notification/notification.module.ts

@@ -8,7 +8,11 @@ import { buildMailerOptions, buildTwilioOptions } from '~/core/module-options';
 import { UserModule } from '~/user/user.module';
 import { NotificationsController } from './controllers';
 import { Notification } from './entities';
-import { NotificationCreatedListener, TransactionNotificationListener } from './listeners';
+import {
+  MoneyRequestNotificationListener,
+  NotificationCreatedListener,
+  TransactionNotificationListener,
+} from './listeners';
 import { NotificationsRepository } from './repositories';
 import { FirebaseService, NotificationFactory, NotificationsService, TwilioService } from './services';
 import { MessagingSystemFactory, RedisPubSubMessagingService } from './services/messaging';
@@ -35,6 +39,7 @@ import { MessagingSystemFactory, RedisPubSubMessagingService } from './services/
     TwilioService,
     NotificationCreatedListener,
     TransactionNotificationListener,
+    MoneyRequestNotificationListener,
     RedisPubSubMessagingService,
     MessagingSystemFactory,
   ],

src/i18n/ar/app.json

@@ -110,5 +110,16 @@
     "INSUFFICIENT_BALANCE": "البطاقة لا تحتوي على رصيد كافٍ لإكمال هذا التحويل.",
     "DOES_NOT_BELONG_TO_GUARDIAN": "البطاقة لا تنتمي إلى ولي الأمر.",
     "NOT_FOUND": "لم يتم العثور على البطاقة."
+  },
+  "NOTIFICATION": {
+    "CHILD_TOP_UP_TITLE": "تم شحن البطاقة",
+    "CHILD_TOP_UP_MESSAGE": "لقد استلمت {{amount}} {{currency}}. الرصيد الإجمالي: {{balance}} {{currency}}",
+    "CHILD_SPENDING_TITLE": "تمت العملية بنجاح",
+    "CHILD_SPENDING_MESSAGE": "لقد أنفقت {{amount}} {{currency}} في {{merchant}}. الرصيد: {{balance}} {{currency}}",
+    "PARENT_TOP_UP_TITLE": "تأكيد الشحن",
+    "PARENT_TOP_UP_MESSAGE": "لقد قمت بتحويل {{amount}} {{currency}} إلى {{childName}}. الرصيد: {{balance}} {{currency}}",
+    "PARENT_SPENDING_TITLE": "تنبيه إنفاق الطفل",
+    "PARENT_SPENDING_MESSAGE": "أنفق {{childName}} {{amount}} {{currency}} في {{merchant}}. الرصيد: {{balance}} {{currency}}",
+    "YOUR_CHILD": "طفلك"
   }
 }

src/i18n/en/app.json

@@ -109,5 +109,16 @@
     "INSUFFICIENT_BALANCE": "The card does not have sufficient balance to complete this transfer.",
     "DOES_NOT_BELONG_TO_GUARDIAN": "The card does not belong to the guardian.",
     "NOT_FOUND": "The card was not found."
+  },
+  "NOTIFICATION": {
+    "CHILD_TOP_UP_TITLE": "Card Topped Up",
+    "CHILD_TOP_UP_MESSAGE": "You received {{amount}} {{currency}}. Total balance: {{balance}} {{currency}}",
+    "CHILD_SPENDING_TITLE": "Purchase Successful",
+    "CHILD_SPENDING_MESSAGE": "You spent {{amount}} {{currency}} at {{merchant}}. Balance: {{balance}} {{currency}}",
+    "PARENT_TOP_UP_TITLE": "Top-Up Confirmation",
+    "PARENT_TOP_UP_MESSAGE": "You transferred {{amount}} {{currency}} to {{childName}}. Balance: {{balance}} {{currency}}",
+    "PARENT_SPENDING_TITLE": "Child Spending Alert",
+    "PARENT_SPENDING_MESSAGE": "{{childName}} spent {{amount}} {{currency}} at {{merchant}}. Balance: {{balance}} {{currency}}",
+    "YOUR_CHILD": "Your child"
   }
 }

src/money-request/repositories/money-requests.repository.ts

@@ -56,7 +56,33 @@ export class MoneyRequestsRepository {
     }
     return this.moneyRequestRepository.findOne({
       where: whereCondition,
-      relations: ['junior', 'junior.customer', 'junior.customer.user', 'junior.customer.user.profilePicture'],
+      relations: [
+        'junior',
+        'junior.customer',
+        'junior.customer.user',
+        'junior.customer.user.profilePicture',
+      ],
+    });
+  }
+
+  findByIdWithAllRelations(id: string, userId?: string, role?: Roles): Promise<MoneyRequest | null> {
+    const whereCondition: any = { id };
+    if (role === Roles.JUNIOR) {
+      whereCondition.juniorId = userId;
+    } else {
+      whereCondition.guardianId = userId;
+    }
+    return this.moneyRequestRepository.findOne({
+      where: whereCondition,
+      relations: [
+        'junior',
+        'junior.customer',
+        'junior.customer.user',
+        'junior.customer.user.profilePicture',
+        'guardian',
+        'guardian.customer',
+        'guardian.customer.user',
+      ],
     });
   }
 

src/money-request/services/money-requests.service.ts

@@ -1,6 +1,13 @@
 import { BadRequestException, Injectable, Logger } from '@nestjs/common';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import { Transactional } from 'typeorm-transactional';
 import { Roles } from '~/auth/enums';
+import { NOTIFICATION_EVENTS } from '~/common/modules/notification/constants/event-names.constant';
+import {
+  IMoneyRequestApprovedEvent,
+  IMoneyRequestCreatedEvent,
+  IMoneyRequestDeclinedEvent,
+} from '~/common/modules/notification/interfaces/notification-events.interface';
 import { OciService } from '~/document/services';
 import { Junior } from '~/junior/entities/junior.entity';
 import { JuniorService } from '~/junior/services';
@@ -16,10 +23,19 @@ export class MoneyRequestsService {
     private readonly moneyRequestsRepository: MoneyRequestsRepository,
     private readonly juniorService: JuniorService,
     private readonly ociService: OciService,
+    private readonly eventEmitter: EventEmitter2,
   ) {}
   async createMoneyRequest(juniorId: string, body: CreateMoneyRequestDto) {
     const junior = await this.juniorService.findJuniorById(juniorId);
     const moneyRequest = await this.moneyRequestsRepository.createMoneyRequest(junior.id, junior.guardianId, body);
+    const moneyRequestWithRelations = await this.moneyRequestsRepository.findByIdWithAllRelations(moneyRequest.id);
+
+    const event: IMoneyRequestCreatedEvent = {
+      moneyRequest: moneyRequestWithRelations!,
+      timestamp: new Date(),
+    };
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.MONEY_REQUEST_CREATED, event);
+
     return this.findById(moneyRequest.id);
   }
 
@@ -63,6 +79,13 @@ export class MoneyRequestsService {
         moneyRequest.guardianId,
       ),
     ]);
+
+    const updatedMoneyRequest = await this.moneyRequestsRepository.findByIdWithAllRelations(id, guardianId, Roles.GUARDIAN);
+    const event: IMoneyRequestApprovedEvent = {
+      moneyRequest: updatedMoneyRequest!,
+      timestamp: new Date(),
+    };
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.MONEY_REQUEST_APPROVED, event);
   }
 
   async rejectMoneyRequest(
@@ -85,6 +108,14 @@ export class MoneyRequestsService {
     }
 
     await this.moneyRequestsRepository.rejectMoneyRequest(id, rejectionReasondto?.rejectionReason);
+
+    const updatedMoneyRequest = await this.moneyRequestsRepository.findByIdWithAllRelations(id, guardianId, Roles.GUARDIAN);
+    const event: IMoneyRequestDeclinedEvent = {
+      moneyRequest: updatedMoneyRequest!,
+      rejectionReason: rejectionReasondto?.rejectionReason,
+      timestamp: new Date(),
+    };
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.MONEY_REQUEST_DECLINED, event);
   }
 
   private async prepareJuniorImages(juniors: Junior[]) {

src/user/repositories/device.repository.ts

@@ -11,6 +11,10 @@ export class DeviceRepository {
     return this.deviceRepository.findOne({ where: { deviceId, userId } });
   }
 
+  findByDeviceId(deviceId: string) {
+    return this.deviceRepository.findOne({ where: { deviceId } });
+  }
+
   createDevice(data: Partial<Device>) {
     return this.deviceRepository.save(data);
   }

src/user/services/device.service.ts

@@ -10,6 +10,11 @@ export class DeviceService {
     return this.deviceRepository.findUserDeviceById(deviceId, userId);
   }
 
+  findByDeviceId(deviceId: string) {
+    this.logger.log(`Finding device with id ${deviceId} (any user)`);
+    return this.deviceRepository.findByDeviceId(deviceId);
+  }
+
   createDevice(data: Partial<Device>) {
     this.logger.log(`Creating device with data ${JSON.stringify(data)}`);
     return this.deviceRepository.createDevice(data);