Project 1: RESTful Todo Task Manager API

Build a Complete Task Manager REST API

In this interactive project, you will build a complete RESTful API for managing tasks with Express.

Project Architecture & Implementation

const express = require("express");
const app = express();
app.use(express.json());

let todos = [
  { id: 1, title: "Learn Event Loop", completed: true },
  { id: 2, title: "Master Express Middleware", completed: false }
];

// GET /api/todos - List all tasks with optional ?completed=true query filter
app.get("/api/todos", (req, res) => {
  const { completed } = req.query;
  let result = todos;

  if (completed !== undefined) {
    const isCompleted = completed === "true";
    result = todos.filter(t => t.completed === isCompleted);
  }

  res.status(200).json({ status: "success", count: result.length, data: result });
});

// POST /api/todos - Create a task
app.post("/api/todos", (req, res) => {
  const { title } = req.body;
  if (!title) {
    return res.status(400).json({ status: "fail", message: "Title is required" });
  }

  const newTodo = { id: Date.now(), title, completed: false };
  todos.push(newTodo);
  res.status(201).json({ status: "success", data: newTodo });
});

// PATCH /api/todos/:id - Toggle task completion status
app.patch("/api/todos/:id", (req, res) => {
  const todo = todos.find(t => t.id === Number(req.params.id));
  if (!todo) {
    return res.status(404).json({ status: "fail", message: "Task not found" });
  }

  if (req.body.completed !== undefined) {
    todo.completed = Boolean(req.body.completed);
  }
  if (req.body.title) {
    todo.title = req.body.title;
  }

  res.status(200).json({ status: "success", data: todo });
});

// DELETE /api/todos/:id - Remove task
app.delete("/api/todos/:id", (req, res) => {
  const index = todos.findIndex(t => t.id === Number(req.params.id));
  if (index === -1) {
    return res.status(404).json({ status: "fail", message: "Task not found" });
  }

  todos.splice(index, 1);
  res.status(200).json({ status: "success", message: "Task deleted successfully" });
});

TL;DR

• Implement full RESTful endpoints with GET, POST, PATCH, and DELETE.
• Filter collections with query string parameters.