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* Order Service
*
* Centralized business logic for order operations.
* Wraps order utilities with a clean service API.
*/
import { prisma } from '@/lib/prisma';
import { Prisma, OrderStatus, Order } from '@prisma/client';
import { logger } from '@/lib/logging';
import {
calculateOrderTotals,
calculateLineItemTotal,
calculateDiscountAmount,
validateOrderItems,
validateShippingAddress,
validateOrderData,
canTransitionStatus,
getAllowedStatusTransitions,
validateStatusTransition,
formatOrderNumber,
parseOrderNumber,
isOrderCancellable,
isOrderModifiable,
getOrderStatusDisplay,
getOrderStatusColor,
validatePromoCode,
isPromoCodeExpired,
isPromoCodeLimitReached,
OrderItem,
OrderCalculation,
CreateOrderData,
OrderValidationResult,
TAX_RATE,
FREE_SHIPPING_THRESHOLD,
STANDARD_SHIPPING_COST
} from '@/lib/ecommerce/orders';
/**
* Order with items and product details
*/
export interface OrderWithItems extends Order {
items: Array<{
id: number;
productId: number;
quantity: number;
price: number;
product: {
id: number;
title: string;
images: Array<{ url: string; thumbnailUrl: string }>;
};
}>;
}
/**
* Order list filters
*/
export interface OrderFilters {
userId?: number;
status?: OrderStatus;
startDate?: Date;
endDate?: Date;
}
/**
* Pagination options
*/
export interface PaginationOptions {
page?: number;
limit?: number;
}
export class OrderService {
// Re-export constants
static readonly TAX_RATE = TAX_RATE;
static readonly FREE_SHIPPING_THRESHOLD = FREE_SHIPPING_THRESHOLD;
static readonly STANDARD_SHIPPING_COST = STANDARD_SHIPPING_COST;
// ============================================================================
// ORDER RETRIEVAL
// ============================================================================
/**
* Get order by ID
*/
static async getById(orderId: number): Promise<OrderWithItems | null> {
return prisma.order.findUnique({
where: { id: orderId },
include: {
items: {
include: {
product: {
include: {
images: true
}
}
}
}
}
}) as Promise<OrderWithItems | null>;
}
/**
* Get orders for a user
*/
static async getByUserId(
userId: number,
pagination?: PaginationOptions
): Promise<{ orders: OrderWithItems[]; total: number }> {
const { page = 1, limit = 10 } = pagination || {};
const skip = (page - 1) * limit;
const [orders, total] = await Promise.all([
prisma.order.findMany({
where: { userId },
include: {
items: {
include: {
product: {
include: {
images: true
}
}
}
}
},
orderBy: { createdAt: 'desc' },
skip,
take: limit
}),
prisma.order.count({ where: { userId } }),
]);
return { orders: orders as OrderWithItems[], total };
}
/**
* Get orders with filters (admin)
*/
static async getOrders(
filters?: OrderFilters,
pagination?: PaginationOptions
): Promise<{ orders: OrderWithItems[]; total: number }> {
const { page = 1, limit = 10 } = pagination || {};
const skip = (page - 1) * limit;
const where: Prisma.OrderWhereInput = {};
if (filters?.userId) {
where.userId = filters.userId;
}
if (filters?.status) {
where.status = filters.status;
}
if (filters?.startDate || filters?.endDate) {
where.createdAt = {};
if (filters.startDate) {
where.createdAt.gte = filters.startDate;
}
if (filters.endDate) {
where.createdAt.lte = filters.endDate;
}
}
const [orders, total] = await Promise.all([
prisma.order.findMany({
where,
include: {
items: {
include: {
product: {
include: {
images: true
}
}
}
}
},
orderBy: { createdAt: 'desc' },
skip,
take: limit
}),
prisma.order.count({ where }),
]);
return { orders: orders as OrderWithItems[], total };
}
// ============================================================================
// ORDER CREATION
// ============================================================================
/**
* Create a new order
*/
static async create(data: CreateOrderData): Promise<OrderWithItems> {
// Validate order data
const validation = validateOrderData(data);
if (!validation.valid) {
throw new Error(`Invalid order data: ${validation.errors.join(', ')}`);
}
// Calculate totals
const totals = calculateOrderTotals(data.items, data.discountAmount || 0);
try {
const order = await prisma.order.create({
data: {
userId: data.userId,
status: 'PROCESSING',
total: totals.total,
shippingAddress: data.shippingAddress,
billingAddress: data.billingAddress || data.shippingAddress,
appliedPromoCode: data.appliedPromoCode,
discountAmount: totals.discount,
items: {
createMany: {
data: data.items.map((item) => ({
productId: item.productId,
quantity: item.quantity,
price: item.price
}))
}
}
},
include: {
items: {
include: {
product: {
include: {
images: true
}
}
}
}
}
});
logger.info(`Order ${order.id} created for user ${data.userId}`, {
category: 'ORDER',
orderId: order.id,
userId: data.userId,
});
return order as OrderWithItems;
} catch (error) {
logger.error('Failed to create order', error instanceof Error ? error : new Error(String(error)), {
category: 'ORDER',
});
throw new Error('Failed to create order');
}
}
// ============================================================================
// ORDER STATUS MANAGEMENT
// ============================================================================
/**
* Update order status
*/
static async updateStatus(
orderId: number,
newStatus: OrderStatus
): Promise<Order> {
const order = await prisma.order.findUnique({
where: { id: orderId }
});
if (!order) {
throw new Error(`Order ${orderId} not found`);
}
const validation = validateStatusTransition(order.status, newStatus);
if (!validation.valid) {
throw new Error(`Invalid status transition: ${validation.errors.join(', ')}`);
}
const updatedOrder = await prisma.order.update({
where: { id: orderId },
data: { status: newStatus }
});
logger.info(`Order ${orderId} status changed from ${order.status} to ${newStatus}`, {
category: 'ORDER',
orderId,
oldStatus: order.status,
newStatus,
});
return updatedOrder;
}
/**
* Cancel an order
*/
static async cancel(orderId: number): Promise<Order> {
const order = await prisma.order.findUnique({
where: { id: orderId }
});
if (!order) {
throw new Error(`Order ${orderId} not found`);
}
if (!isOrderCancellable(order.status)) {
throw new Error(
`Cannot cancel order with status ${order.status}. Order must be PROCESSING or SHIPPED.`
);
}
const cancelledOrder = await prisma.order.update({
where: { id: orderId },
data: { status: 'CANCELLED' }
});
logger.info(`Order ${orderId} cancelled`, {
category: 'ORDER',
orderId,
});
return cancelledOrder;
}
// ============================================================================
// ORDER CALCULATIONS (Static utilities)
// ============================================================================
/**
* Calculate order totals
*/
static calculateTotals(
items: OrderItem[],
discountAmount: number = 0
): OrderCalculation {
return calculateOrderTotals(items, discountAmount);
}
/**
* Calculate line item total
*/
static calculateLineItem(price: number, quantity: number): number {
return calculateLineItemTotal(price, quantity);
}
/**
* Calculate discount from percentage
*/
static calculateDiscount(subtotal: number, percentage: number): number {
return calculateDiscountAmount(subtotal, percentage);
}
// ============================================================================
// VALIDATION (Static utilities)
// ============================================================================
/**
* Validate order items
*/
static validateItems(items: OrderItem[]): OrderValidationResult {
return validateOrderItems(items);
}
/**
* Validate shipping address
*/
static validateAddress(address: string): OrderValidationResult {
return validateShippingAddress(address);
}
/**
* Validate promo code format
*/
static validatePromoCode(code: string): OrderValidationResult {
return validatePromoCode(code);
}
/**
* Check if promo code is expired
*/
static isPromoExpired(endDate: Date): boolean {
return isPromoCodeExpired(endDate);
}
/**
* Check if promo code limit is reached
*/
static isPromoLimitReached(usedCount: number, limit: number | null): boolean {
return isPromoCodeLimitReached(usedCount, limit);
}
// ============================================================================
// STATUS HELPERS (Static utilities)
// ============================================================================
/**
* Check if status transition is valid
*/
static canTransition(from: OrderStatus, to: OrderStatus): boolean {
return canTransitionStatus(from, to);
}
/**
* Get allowed transitions for current status
*/
static getAllowedTransitions(status: OrderStatus): OrderStatus[] {
return getAllowedStatusTransitions(status);
}
/**
* Check if order can be cancelled
*/
static isCancellable(status: OrderStatus): boolean {
return isOrderCancellable(status);
}
/**
* Check if order can be modified
*/
static isModifiable(status: OrderStatus): boolean {
return isOrderModifiable(status);
}
// ============================================================================
// DISPLAY HELPERS (Static utilities)
// ============================================================================
/**
* Format order ID to order number
*/
static formatNumber(orderId: number): string {
return formatOrderNumber(orderId);
}
/**
* Parse order number to ID
*/
static parseNumber(orderNumber: string): number | null {
return parseOrderNumber(orderNumber);
}
/**
* Get status display text
*/
static getStatusDisplay(status: OrderStatus): string {
return getOrderStatusDisplay(status);
}
/**
* Get status color for UI
*/
static getStatusColor(status: OrderStatus): string {
return getOrderStatusColor(status);
}
}
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