update concurrentCapacity

src/modules/bookings/bookings.service.ts

@@ -388,6 +388,7 @@ export class BookingsService {
 
     const windows = await this.loadAvailabilityWindows(businessId);
     const busy = await this.loadBusyIntervals(businessId, dateYmd);
+    const concurrentCapacity = await this.getConcurrentCapacity(businessId);
 
     const slots = generateAvailableSlotStarts({
       dateYmd,
@@ -396,11 +397,21 @@ export class BookingsService {
       slotStepMinutes: 15,
       windows,
       busy,
+      concurrentCapacity,
     });
 
     return { date: dateYmd, slots, totalDurationMinutes };
   }
 
+  private async getConcurrentCapacity(businessId: string): Promise<number> {
+    const business = await this.businessRepo.findOne({
+      where: { id: businessId },
+      select: ['id', 'concurrentCapacity'],
+    });
+    const value = business?.concurrentCapacity ?? 1;
+    return Math.max(1, value);
+  }
+
   private async loadAvailabilityWindows(
     businessId: string,
   ): Promise<AvailabilityWindow[]> {
@@ -647,6 +658,7 @@ export class BookingsService {
       );
     }
 
+    const concurrentCapacity = await this.getConcurrentCapacity(businessId);
     const slots = generateAvailableSlotStarts({
       dateYmd,
       durationMinutes,
@@ -657,6 +669,7 @@ export class BookingsService {
         excludeBookingId,
         excludeBookingGroupId,
       }),
+      concurrentCapacity,
     });
 
     const scheduledMs = scheduledAt.getTime();

src/modules/businesses/dto/update-business.dto.ts

@@ -1,13 +1,16 @@
 import { ApiPropertyOptional } from '@nestjs/swagger';
 import {
   IsBoolean,
+  IsInt,
   IsLatitude,
   IsLongitude,
   IsOptional,
   IsString,
   IsUUID,
   Matches,
+  Max,
   MaxLength,
+  Min,
 } from 'class-validator';
 
 export class UpdateBusinessDto {
@@ -76,4 +79,16 @@ export class UpdateBusinessDto {
   @IsOptional()
   @IsBoolean()
   serviceClassesEnabled?: boolean;
+
+  @ApiPropertyOptional({
+    example: 1,
+    description: 'How many customers can be served at the same time',
+    minimum: 1,
+    maximum: 20,
+  })
+  @IsOptional()
+  @IsInt()
+  @Min(1)
+  @Max(20)
+  concurrentCapacity?: number;
 }