add discount

src/modules/orders/dto/admin-create-order.dto.ts

@@ -25,10 +25,10 @@ export class AdminOrderItemDto {
 }
 
 export class AdminCreateOrderDto {
-  @ApiProperty({ description: 'User ID to create the order for' })
+  @ApiPropertyOptional({ description: 'User ID to create the order for' })
   @IsString()
-  @IsNotEmpty()
-  userId: string;
+  @IsOptional()
+  userId?: string;
 
   @ApiProperty({ type: [AdminOrderItemDto], description: 'Order items' })
   @IsArray()
@@ -47,6 +47,12 @@ export class AdminCreateOrderDto {
   @IsNotEmpty()
   paymentMethodId: string;
 
+  @ApiPropertyOptional({ description: 'Extra discount amount to apply on the order', minimum: 0 })
+  @IsOptional()
+  @IsNumber()
+  @Min(0)
+  discountAmount?: number;
+
   @ApiPropertyOptional({ description: 'Order description or notes' })
   @IsOptional()
   @IsString()

src/modules/orders/providers/orders.service.ts

@@ -67,7 +67,6 @@ export class OrdersService {
   async checkout(userId: string, restaurantId: string) {
     const cart = await this.cartService.findOneOrFail(userId, restaurantId);
     const validated = await this.validateCartForOrder(userId, restaurantId, cart);
-console.log(cart);
 
     const order = await this.em.transactional(async em => {
       const order = em.create(Order, {
@@ -148,7 +147,7 @@ console.log(cart);
   }
 
   async createOrderForUser(restaurantId: string, dto: AdminCreateOrderDto): Promise<Order> {
-    const user = await this.getUserOrFail(dto.userId);
+    const user = dto.userId ? await this.getUserOrFail(dto.userId) : null;
 
     const [restaurant, delivery] = await Promise.all([
       this.getRestaurantOrFail(restaurantId),
@@ -162,7 +161,7 @@ console.log(cart);
 
     const userAddress =
       delivery.method === DeliveryMethodEnum.DeliveryCourier
-        ? await this.resolveUserAddressForOrder(user, dto.addressId!)
+        ? await this.resolveUserAddressForOrder(user!, dto.addressId!)
         : null;
 
     const orderItemsData = await this.buildOrderItemsDataFromDto(dto.items, restaurantId);
@@ -170,7 +169,12 @@ console.log(cart);
     const subTotal = orderItemsData.reduce((sum, item) => sum + item.unitPrice * item.quantity, 0);
     const itemsDiscount = orderItemsData.reduce((sum, item) => sum + item.discount * item.quantity, 0);
     const deliveryFee = delivery.deliveryFeeType === DeliveryFeeTypeEnum.FIXED ? Number(delivery.deliveryFee) : 0;
-    const totalDiscount = itemsDiscount;
+    const adminDiscount = dto.discountAmount ?? 0;
+    const maxDiscount = subTotal - itemsDiscount;
+    if (adminDiscount > maxDiscount) {
+      throw new BadRequestException(OrderMessage.DISCOUNT_AMOUNT_EXCEEDS_ORDER_TOTAL);
+    }
+    const totalDiscount = itemsDiscount + adminDiscount;
     const total = subTotal - totalDiscount + deliveryFee;
     const totalItems = orderItemsData.reduce((sum, item) => sum + item.quantity, 0);
 
@@ -182,7 +186,7 @@ console.log(cart);
         userAddress,
         carAddress: delivery.method === DeliveryMethodEnum.DeliveryCar ? (dto.carAddress ?? null) : null,
         paymentMethod,
-        couponDiscount: 0,
+        couponDiscount: adminDiscount,
         couponDetail: null,
         itemsDiscount,
         totalDiscount,
@@ -222,7 +226,7 @@ console.log(cart);
       await this.inventoryService.deductFromInventory(em, bulkReserveFoodDto);
       await em.flush();
 
-      this.logger.debug(`Admin created order ${order.id} for user ${user.id} (restaurant: ${restaurantId})`);
+      this.logger.debug(`Admin created order ${order.id} for user ${user?.id || 'anonymous'} (restaurant: ${restaurantId})`);
       return order;
     });
 
@@ -639,6 +643,10 @@ console.log(cart);
     if (delivery.method === DeliveryMethodEnum.DeliveryCar && !dto.carAddress) {
       throw new BadRequestException(OrderMessage.CAR_ADDRESS_REQUIRED);
     }
+
+    if (delivery.method === DeliveryMethodEnum.DeliveryCourier && !dto.userId) {
+      throw new BadRequestException(OrderMessage.USER_REQUIRED);
+    }
   }