Build an E-Commerce Order API

Problem/Feature Description

An e-commerce company needs a REST API for their order management system. The API is built with Express and TypeScript. A Vue.js storefront on a separate domain will call this API. The service runs behind a single nginx proxy in their data center.

The API needs the following endpoints:

• GET /api/products -- list all products
• GET /api/products/:id -- get a single product
• POST /api/orders -- place a new order (accepts items array with productId and quantity, plus customerEmail)
• GET /api/orders/:id -- get order details
• GET /api/orders -- list orders (supports ?status=pending filter)

Use in-memory arrays for products and orders. Products should have id, name, price, and stock fields. Orders should have id, items, customerEmail, total, status, and createdAt. When an order is placed, validate that products exist and have sufficient stock, then decrement stock accordingly.

Output Specification

Produce:

• app.ts -- Express application with all middleware and route setup
• routes/products.ts -- Router module for product endpoints
• routes/orders.ts -- Router module for order endpoints
• package.json -- With all required dependencies