✨ feat: 예매 내역 삭제 시 좌석 반납

Issue Resolved: #254

Author: kyu4583

back/src/domains/booking/booking.module.ts

@@ -25,6 +25,6 @@ import { WaitingQueueService } from './service/waiting-queue.service';
     WaitingQueueService,
     EnterBookingService,
   ],
-  exports: [InBookingService],
+  exports: [BookingService, InBookingService],
 })
 export class BookingModule {}

back/src/domains/booking/service/booking.service.ts

@@ -155,6 +155,12 @@ export class BookingService {
     }
   }
 
+  async freeSeatsIfEventOpened(eventId: number, seats: [number, number][]) {
+    if (await this.openBookingService.isEventOpened(eventId)) {
+      await Promise.all(seats.map((seat) => this.bookingSeatsService.updateSeatDeleted(eventId, seat)));
+    }
+  }
+
   async getTimeMs(): Promise<ServerTimeDto> {
     try {
       return {

back/src/domains/reservation/repository/reservation.repository.ts

@@ -18,6 +18,15 @@ export class ReservationRepository {
     });
   }
 
+  async findReservationByIdMatchedUserId(userId: number, reservationId: number) {
+    return await this.ReservationRepository.findOne({
+      where: {
+        id: reservationId,
+        user: { id: userId },
+      },
+    });
+  }
+
   async deleteReservationByIdMatchedUserId(userId: number, reservationId: number) {
     return await this.ReservationRepository.softDelete({
       id: reservationId,

back/src/domains/reservation/service/reservation.service.ts

@@ -6,6 +6,7 @@ import { DataSource, In, QueryRunner } from 'typeorm';
 import { UserParamDto } from 'src/util/user-injection/userParamDto';
 
 import { AuthService } from '../../../auth/service/auth.service';
+import { BookingService } from '../../booking/service/booking.service';
 import { InBookingService } from '../../booking/service/in-booking.service';
 import { Event } from '../../event/entity/event.entity';
 import { Place } from '../../place/entity/place.entity';
@@ -32,6 +33,7 @@ export class ReservationService {
     @Inject() private readonly redisService: RedisService,
     @Inject() private readonly dataSource: DataSource,
     @Inject() private readonly authService: AuthService,
+    @Inject() private readonly bookingService: BookingService,
     @Inject() private readonly inBookingService: InBookingService,
     @Inject() private readonly userService: UserService,
   ) {
@@ -76,9 +78,17 @@ export class ReservationService {
   }
 
   async deleteReservation({ id }: UserParamDto, { reservationId }: ReservationIdDto) {
-    const result = await this.reservationRepository.deleteReservationByIdMatchedUserId(id, reservationId);
-    if (!result.affected)
+    const reservation = await this.reservationRepository.findReservationByIdMatchedUserId(id, reservationId);
+    if (!reservation) {
       throw new BadRequestException(`사용자의 해당 예매 내역[${reservationId}]가 존재하지 않습니다.`);
+    }
+
+    const eventId = (await reservation.event).id;
+    const reservedSeats = await reservation.reservedSeats;
+    const reservedSeatsData: [number, number][] = reservedSeats.map((seat) => [seat.row - 1, seat.col - 1]);
+    await this.bookingService.freeSeatsIfEventOpened(eventId, reservedSeatsData);
+
+    await this.reservationRepository.deleteReservationByIdMatchedUserId(id, reservationId);
   }
 
   validateReservationLength(seats: ReservationSeatInfoDto[]) {