JS Lab 2

2026-03-25 16:10:17 -04:00
parent f3667266a9
commit 942da76704
933 changed files with 149047 additions and 2 deletions
@@ -0,0 +1,104 @@
+import express from "express";
+import bodyParser from "body-parser";
+const { json } = bodyParser;
+import cors from "cors";
+import db from "./db.js";
+const _query = db.query.bind(db);
+import { join } from "path";
+import { fileURLToPath } from "url";
+
+const app = express();
+const PORT = 3000;
+
+app.use(cors());
+app.use(json());
+
+const filename = fileURLToPath(import.meta.url);
+const dirname = join(filename, "..");
+
+app.use(express.static(join(dirname, "public")));
+
+app.post("/add", (req,res) => {
+    const {customer_id, name, email, phone } = req.body;
+
+    if (!customer_id || !name || !email || !phone ) {
+        return res.status(400).json({ error: "All fields are required" });
+    }
+
+    const query = "INSERT INTO customers (customer_id, name, email, phone) VALUES (?, ?, ?, ?)";
+    _query(query, [customer_id, name, email, phone], (err, results) => {
+        if (err) {
+            console.error(err);
+            if (err.code === "ER_DUP_ENTRY") {
+                return res.status(400).json({ error: "Customer ID already exists" });
+            }
+            return res.status(500).json({ error: err.message });
+        }
+        res.join({ message: "Customer added successfully! "});
+    });
+});
+
+app.post("/find", (req, res) => {
+    const { customer_id } = req.body;
+
+    if (!customer_id) {
+        return res.status(400).json({ error: "Customer ID is required" });
+    }
+
+    const query = "SELECT * FROM customers WHERE customer_id = ?";
+    _query(query, [customer_id], (err, results) => {
+        if (err) {
+            console.error(err);
+            return res.status(500).json({ error: err.message });
+        }
+        if (results.length === 0) {
+            return res.status(404).json({ error: "Customer not found" });
+        }
+        res.json(results[0]);
+    });
+});
+
+app.post("/update", (req, res) => {
+    const { customer_id, name, email, phone } = req.body;
+
+    if (!customer_id || !name || !email || !phone ) {
+        return res.status(400).json({ error: "All fields are required" });
+    }
+
+    const query = "UPDATE customers SET name = ?, email = ?, phone = ? WHERE customer_id = ?";
+    _query(query, [name, email, phone, customer_id], (err, results) => {
+        if (err) {
+            console.error(err);
+            return res.status(500).json({ error: err.message });
+        }
+
+        if (results.affectedRows === 0) {
+            return res.status(404).json({ error: "Customer not found" });
+        }
+        res.json({ message: "Customer updated successfully!" });
+    });
+});
+
+app.post("/delete", (req, res) => {
+    const { customer_id } = req.body;
+    
+    if (!customer_id) {
+        return res.status(400).json({ error: "Customer ID is required" });
+    }
+
+    const query = "DELETE FROM customers WHERE customer_id = ?";
+    _query(query, [customer_id], (err, results) => {
+        if (err) {
+            console.error(err);
+            return res.status(500).json({ error: err.message });
+        }
+        if (results.affectedRows === 0) {
+            return res.status(404).json({ error: "Customer not found" });
+        }
+        res.json({ message: "Customer deleted successfully!" });
+    });
+});
+
+app.listen(PORT, () => {
+    console.log(`Server is running on http://localhost:${PORT}`);
+});