campaign

src/modules/restaurants/providers/restaurant-wallet.service.ts

@@ -0,0 +1,49 @@
+import { BadRequestException, Injectable } from '@nestjs/common';
+import { EntityManager } from '@mikro-orm/postgresql';
+import { Restaurant } from '../entities/restaurant.entity';
+import { RestaurantCreditTransaction } from '../entities/restaurant-credit-transaction.entity';
+import {
+  RestaurantCreditTransactionReason,
+  RestaurantCreditTransactionType,
+} from '../interface/restaurant-credit-transaction.interface';
+
+@Injectable()
+export class RestaurantWalletService {
+  constructor(private readonly defaultEm: EntityManager) {}
+
+  async createTransaction(params: {
+    restaurant: Restaurant;
+    amount: number;
+    type: RestaurantCreditTransactionType;
+    reason: RestaurantCreditTransactionReason;
+    insufficientBalanceMessage?: string;
+    em?: EntityManager;
+  }): Promise<void> {
+    const { restaurant, amount, type, reason, insufficientBalanceMessage, em = this.defaultEm } = params;
+
+    if (amount <= 0) {
+      return;
+    }
+
+    const currentCredit = Number(restaurant.credit ?? 0);
+    if (type === RestaurantCreditTransactionType.DEBIT && currentCredit < amount) {
+      throw new BadRequestException(insufficientBalanceMessage ?? 'اعتبار کیف پول رستوران کافی نیست');
+    }
+
+    const newBalance =
+      type === RestaurantCreditTransactionType.DEBIT ? currentCredit - amount : currentCredit + amount;
+
+    restaurant.credit = newBalance;
+
+    const creditTransaction = em.create(RestaurantCreditTransaction, {
+      restaurant,
+      amount,
+      balance: newBalance,
+      type,
+      reason,
+    });
+
+    await em.persistAndFlush([restaurant, creditTransaction]);
+  }
+
+}