Create db service and example

Author: Patzi275

src/api/controllers/tasks.ts

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+import { Request, Response } from "express";
+import { Task } from "../../models/task";
+
+let tasks: Task[] = [];
+
+export const createTask = (req: Request, res: Response) => {
+ const task: Task = {
+ id: tasks.length + 1,
+ title: req.body.title,
+ description: req.body.description,
+ completed: false
+ };
+
+ tasks.push(task);
+ res.status(201).json(task);
+};
+
+export const getAllTasks = (req: Request, res: Response) => {
+ res.json(tasks);
+};
+
+export const getTask = (req: Request, res: Response) => {
+ const task = tasks.find((t) => t.id === parseInt(req.params.id));
+
+ if (!task) {
+ res.status(404).send('Task not found');
+ } else {
+ res.json(task);
+ }
+};
+
+export const updateTask = (req: Request, res: Response) => {
+ const task = tasks.find((t) => t.id === parseInt(req.params.id));
+
+ if (!task) {
+ res.status(404).send('Task not found');
+ } else {
+ task.title = req.body.title || task.title;
+ task.description = req.body.description || task.description;
+ task.completed = req.body.completed || task.completed;
+
+ res.json(task);
+ }
+};
+
+export const deleteTask = (req: Request, res: Response) => {
+ const index = tasks.findIndex((t) => t.id === parseInt(req.params.id));
+
+ if (index === -1) {
+ res.status(404).send('Task not found');
+ } else {
+ tasks.splice(index, 1);
+ res.status(204).send();
+ }
+};

src/api/routes/tasks.ts

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+import { Router } from "express";
+import { createTask, deleteTask, getAllTasks, getTask, updateTask } from "../controllers/tasks";
+
+const router = Router();
+
+router.post('/', createTask);
+router.get('/', getAllTasks);
+router.get('/:id', getTask);
+router.put('/:id', updateTask);
+router.delete('/:id', deleteTask);
+
+export default router;

src/app.ts

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+import express, { Request, Response } from 'express';
+import tasksRoutes from './api/routes/tasks';
+
+const app = express();
+
+app.use(express.json());
+app.use('/tasks', tasksRoutes);
+
+app.get('/', (req: Request, res: Response) => {
+ res.send('Hello, TypeScript Express!');
+});
+
+
+export default app;

src/models/task.ts

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+export interface Task {
+ id: number;
+ title: string;
+ description: string;
+ completed: boolean;
+}

src/server.ts

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+import app from './app';
+import { port } from './config/server.config';
+import db from './services/db';
+
+const initApp = async () => {
+ console.log('Database connection...');
+
+ app.listen(port || 3000, () => {
+ console.log(`Server running at http://localhost:${port}`);
+ });
+
+ try {
+ await db.authenticate();
+ console.log("Database connection has been established successfully.");
+ } catch (error) {
+ console.error("Unable to connect to the database:", error);
+ }
+};
+
+initApp();

src/services/db.ts

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+import { Sequelize } from "sequelize-typescript";
+import dbConfig from "../config/db.config";
+
+const db = new Sequelize({
+ database: dbConfig.DATABASE,
+ username: dbConfig.USER,
+ password: dbConfig.PASSWORD,
+ host: dbConfig.HOST,
+ dialect: "mysql",
+ pool: {
+ max: 5,
+ min: 0,
+ acquire: 30000,
+ idle: 10000
+ }
+});
+
+export default db;