Initial commit

Author: BaseMax

.gitignore

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+# Based on https://raw.githubusercontent.com/github/gitignore/main/Node.gitignore
+
+# Logs
+
+logs
+_.log
+npm-debug.log_
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Caches
+
+.cache
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# Runtime data
+
+pids
+_.pid
+_.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+
+lib-cov
+
+# Coverage directory used by tools like istanbul
+
+coverage
+*.lcov
+
+# nyc test coverage
+
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+
+bower_components
+
+# node-waf configuration
+
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+
+build/Release
+
+# Dependency directories
+
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+
+web_modules/
+
+# TypeScript cache
+
+*.tsbuildinfo
+
+# Optional npm cache directory
+
+.npm
+
+# Optional eslint cache
+
+.eslintcache
+
+# Optional stylelint cache
+
+.stylelintcache
+
+# Microbundle cache
+
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+
+.node_repl_history
+
+# Output of 'npm pack'
+
+*.tgz
+
+# Yarn Integrity file
+
+.yarn-integrity
+
+# dotenv environment variable files
+
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+
+.parcel-cache
+
+# Next.js build output
+
+.next
+out
+
+# Nuxt.js build / generate output
+
+.nuxt
+dist
+
+# Gatsby files
+
+# Comment in the public line in if your project uses Gatsby and not Next.js
+
+# https://nextjs.org/blog/next-9-1#public-directory-support
+
+# public
+
+# vuepress build output
+
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+
+.temp
+
+# Docusaurus cache and generated files
+
+.docusaurus
+
+# Serverless directories
+
+.serverless/
+
+# FuseBox cache
+
+.fusebox/
+
+# DynamoDB Local files
+
+.dynamodb/
+
+# TernJS port file
+
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+
+.vscode-test
+
+# yarn v2
+
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store

README.md

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+# simple-api
+
+To install dependencies:
+
+```bash
+bun install
+```
+
+To run:
+
+```bash
+bun run src/app.ts
+```
+
+This project was created using `bun init` in bun v1.2.2. [Bun](https://bun.sh) is a fast all-in-one JavaScript runtime.

bun.lock

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+{
+  "name": "simple-api",
+  "author": "Max Base",
+  "module": "src/app.ts",
+  "type": "module",
+  "scripts": {
+    "dev": "bun run src/server.ts",
+    "build": "bun run tsc",
+    "start": "bun run dist/server.js"
+  },
+  "devDependencies": {
+    "@types/bun": "latest",
+    "@types/express": "^5.0.0",
+    "nodemon": "^3.1.9",
+    "ts-node": "^10.9.2"
+  },
+  "peerDependencies": {
+    "typescript": "^5.7.3"
+  },
+  "dependencies": {
+    "dotenv": "^16.4.7",
+    "express": "^4.21.2",
+    "sqlite3": "^5.1.7"
+  }
+}

database.sqlite

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+import express from "express";
+import type { Application } from "express";
+import userRoutes from "./routes/userRoutes";
+
+const app: Application = express();
+app.use(express.json());
+app.use("/users", userRoutes);
+
+export default app;

package.json

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+import sqlite3 from "sqlite3";
+
+export interface User {
+  id: number;
+  name: string;
+  email: string;
+}
+
+const db = new sqlite3.Database("database.sqlite");
+
+db.serialize(() => {
+  db.run(`
+    CREATE TABLE IF NOT EXISTS users (
+      id INTEGER PRIMARY KEY AUTOINCREMENT,
+      name TEXT NOT NULL,
+      email TEXT UNIQUE NOT NULL
+    )
+  `);
+});
+
+export function addUser(name: string, email: string, callback: (error: Error | null) => void): void {
+  db.run("INSERT INTO users (name, email) VALUES (?, ?)", [name, email], function (err) {
+    callback(err);
+  });
+}
+
+export function getUserById(id: number, callback: (error: Error | null, user?: User) => void): void {
+  db.get<User>("SELECT * FROM users WHERE id = ?", [id], (err, row) => {
+    callback(err, row ?? undefined);
+  });
+}
+
+export function getUsers(callback: (error: Error | null, users?: User[]) => void): void {
+    db.all<User>("SELECT * FROM users", (err, rows) => {
+      callback(err, rows ?? []);
+    });
+}
+
+export function getUserCount(callback: (error: Error | null, count?: number) => void): void {
+  db.get<{ count: number }>("SELECT COUNT(*) AS count FROM users", (err, row) => {
+    if (err) {
+      callback(err);
+      return;
+    }
+    callback(null, row?.count ?? 0);
+  });
+}
+
+export function deleteUser(id: number, callback: (error: Error | null, changes?: number) => void): void {
+  db.run("DELETE FROM users WHERE id = ?", [id], function (err) {
+    callback(err, this.changes ?? 0);
+  });
+}
+
+process.on("exit", () => db.close());

src/app.ts

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+import { Router } from "express";
+import type { Request, Response } from "express";
+import { getUsers, addUser, getUserById, getUserCount, deleteUser } from "../db/database";
+
+const router: Router = Router();
+
+router.get("/", (req: Request, res: Response): void => {
+  getUsers((err, users) => {
+    if (err) {
+      res.status(500).send({ success: false, error: err.message });
+      return;
+    }
+    res.json({ success: true, data: users });
+  });
+});
+
+router.get("/count", (req: Request, res: Response): void => {
+  getUserCount((err, count) => {
+    if (err) {
+      res.status(500).send({ success: false, error: err.message });
+      return;
+    }
+    res.json({ success: true, count });
+  });
+});
+
+router.get("/:id", (req: Request, res: Response): void => {
+  const userId = req.params.id;
+
+  if (!/^\d+$/.test(userId)) {
+    res.status(400).send({ success: false, error: "Invalid user ID. It must be a positive number." });
+    return;
+  }
+
+  getUserById(Number(userId), (err, user) => {
+    if (err) {
+      res.status(500).send({ success: false, error: err.message });
+      return;
+    }
+    if (!user) {
+      res.status(404).send({ success: false, error: "User not found" });
+      return;
+    }
+    res.json({ success: true, data: user });
+  });
+});
+
+
+router.post("/", (req: Request, res: Response): void => {
+  const { name, email } = req.body;
+  if (!name || !email) {
+    res.status(400).send({ success: false, error: "Missing name or email" });
+    return;
+  }
+
+  addUser(name, email, (err) => {
+    if (err) {
+      if (err.message.includes("UNIQUE constraint failed")) {
+        res.status(400).send({ success: false, error: "Email already exists" });
+      } else {
+        res.status(500).send({ success: false, error: err.message });
+      }
+      return;
+    }
+    res.json({ success: true, message: "User added successfully" });
+  });
+});
+
+router.delete("/:id", (req: Request, res: Response): void => {
+  const userId = req.params.id;
+
+  if (!/^\d+$/.test(userId)) {
+    res.status(400).send({ success: false, error: "Invalid user ID. It must be a positive number." });
+    return;
+  }
+
+  const userIdNumber: number = Number(userId);
+
+  deleteUser(userIdNumber, (err, changes) => {
+    if (err) {
+      res.status(500).send({ success: false, error: err.message });
+      return;
+    }
+    if (changes === 0) {
+      res.status(404).send({ success: false, error: "User not found or already deleted" });
+      return;
+    }
+    res.json({ success: true, message: "User deleted successfully" });
+  });
+});
+
+export default router;

src/db/database.ts

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+import "dotenv/config";
+import app from "./app";
+
+const PORT = process.env.PORT ? Number(process.env.PORT) : 3000;
+
+app.listen(PORT, () => {
+  console.log(`Server running on http://localhost:${PORT}`);
+});