WM | SQL | Saleh Yousef | sprint-3 | E-Commerce-API

E-Commerce-API/app.js

@@ -1,8 +1,145 @@
 const express = require("express");
 const app = express();
-// Your code to run the server should go here
-// Don't hardcode your DB password in the code or upload it to GitHub! Never ever do this ever.
-// Use environment variables instead:
-// https://www.codementor.io/@parthibakumarmurugesan/what-is-env-how-to-set-up-and-run-a-env-file-in-node-1pnyxw9yxj
+app.use(express.json());// Middleware to parse JSON bodies
 
+let customers = [     
+        {
+            id: 1,
+            name: "Alice Smith",
+            address: "456 Oak St",
+            city: "Liverpool",
+            country: "UK" 
+        },
+        {
+            id: 2,
+            name: "Lee Adam",
+            address: "321 Sea St",
+            city: "Birmingham",
+            country: "UK"
+        }
+];
+
+let orders = [{ id:1, orderDate:"2025-12-01", orderReference:"REF123", customerId:1, orderItem:"Cups", quantity:4 },
+             { id:1, orderDate:"2025-12-01", orderReference:"REF123", customerId:1, orderItem:"Plates", quantity:2 }];
+
+let items = [
+  { id: 1, orderId: 1, productName: "Cups", unitPrice: 10, supplierName: "MS", quantity: 10 },
+  { id: 2, orderId: 1, productName: "Plates", unitPrice: 12, supplierName: "MS", quantity: 10 }
+];
+
+
+app.get("/products", (req, res) => {
+  res.status(200).json([
+    { name: "laptop",price: 2500, supplierName: "Dell" },
+    { name: "phone",price: 800, supplierName: "Apple" },
+    { name: "tablet",price: 600, supplierName: "Samsung" },
+  ]); 
+});
+
+app.get("/customers/:id", (req, res) => {
+    const custId = parseInt(req.params.id) // Simulate fetching from DB
+    res.json({
+        id: custId,
+        name: "John Doe",
+        address: "123 Main St",
+        city: "Anytown",
+        country: "USA"
+    });
+});
+
+app.post("/customers", (req, res) => {
+    const newCustomer = req.body;//
+    newCustomer.id = 2; // Simulate DB generated ID
+    res.status(201).json(newCustomer); // Return created customer
+})
+
+app.post("/products", (req, res) => {
+    const newProduct = req.body;
+    newProduct.id = 4;
+    res.status(201).json(newProduct);
+});
+
+app.post("/product-availability", (req, res) => {
+  const { productId, supplierId, price } = req.body;
+
+  if (!Number.isInteger(price) || price <= 0) {
+    return res.status(400).json({ error: "Price must be a positive integer" });
+  } 
+
+  const validSupplierIds = [1, 2, 3]; // Simulated existing supplier IDs
+  if (!validSupplierIds.includes(supplierId)) {
+    return res.status(404).json({ error: "Supplier not found" });
+  }
+
+  const validProductIds = [1, 2, 3]; // Simulated existing product IDs
+  if (!validProductIds.includes(productId)) {
+    return res.status(404).json({ error: "Product not found" });
+  }
+  const newAvailability = {
+    id: 1, // Simulated DB generated ID
+    productId,
+    supplierId,
+    price,
+  };
+
+  res.status(201).json(newAvailability);
+});
+
+app.post("/customers/:customerId/orders", (req, res) => {
+    const customerId = parseInt(req.params.customerId);
+    const newOrder = req.body;
+    newOrder.id = 1;
+    newOrder.customerId = customerId;
+
+     if (customerId !== 1) {
+        return res.status(404).json({ error: "Customer not found" });
+    }
+    res.status(201).json(newOrder);
+});
+
+app.put("/customers/:customerId", (req, res) => {
+  const customerId = Number(req.params.customerId);
+  const { name, address, city, country } = req.body;
+
+  const customer = customers.find((customer) => customer.id === customerId);
+  customer.name = name;
+  customer.address = address;
+  customer.city = city;
+  customer.country = country;
+
+  return res.status(200).json(customer);
+});
+
+app.delete("/orders/:orderId", (req, res) => {
+    const orderId = parseInt(req.params.orderId);
+    const orderIndex = orders.findIndex(order => order.id === orderId);
+    orders.splice(orderIndex, 1);
+     return res.status(204).send();
+});
+
+app.delete("/customers/:customerId", (req, res) => {
+    const customerId = parseInt(req.params.customerId);
+    const hasOrders = orders.find(order => order.customerId === customerId);
+    if (hasOrders) {
+        return res.status(400).json({ error: "Cannot delete customer with existing orders" });
+    }
+    customers = customers.find(customer => customer.id !== customerId);
+    return res.status(204).send();
+});
+
+app.get("/customers/:customerId/orders", (req, res) => {
+    const customerId = parseInt(req.params.customerId);
+    const customerOrders = orders.filter(order => order.customerId === customerId)
+        .map(order => ({
+            id: order.id,
+            orderDate: order.orderDate,
+            referenceNumber: order.orderReference,
+            productName: order.orderItem,
+            unitPrice: items.find(item => item.productName === order.orderItem).unitPrice,
+            supplierName: items.find(item => item.productName === order.orderItem).supplierName,
+            quantity: order.quantity,
+            items: items.filter(item => item.orderId === order.id)
+        }));
+    res.status(200).json(customerOrders);
+});
 module.exports = app;