Lab5.js

const assignment = {
  id: 1,
  title: "NodeJS Assignment",
  description: "Create a NodeJS server with ExpressJS",
  due: "2021-10-10",
  completed: false,
  score: 0,
};

const todos = [
  { id: 1, title: "Task 1", completed: true },
  { id: 2, title: "Task 2", completed: false },
  { id: 3, title: "Task 3", completed: true },
  { id: 4, title: "Task 4", completed: false },
];

const Lab5 = (app) => {
  app.get("/a5/todos/:id/title/:title", (req, res) => {
    const { id, title } = req.params;
    const todo = todos.find((t) => t.id === parseInt(id));
    todo.title = title;
    res.json(todos);
  });

  app.get("/a5/todos/:id/delete", (req, res) => {
    const { id } = req.params;
    const todo = todos.find((t) => t.id === parseInt(id));
    todos.splice(todos.indexOf(todo), 1);
    res.json(todos);
  });

  app.put("/a5/todos/:id", (req, res) => {
    const { id } = req.params;
    const todo = todos.find((t) => t.id === parseInt(id));
    if (!todo) {
      res.res
        .status(404)
        .json({ message:
          `Unable to update Todo with ID ${id}` });
      return;
    }

    todo.title = req.body.title;
    todo.description = req.body.description;
    todo.due = req.body.due;
    todo.completed = req.body.completed;
    res.sendStatus(200);
  });

  app.delete("/a5/todos/:id", (req, res) => {
    const { id } = req.params;
    const todo = todos.find((t) => t.id === parseInt(id));
    if (!todo) {
      res.res
        .status(404)
        .json({ message:
          `Unable to delete Todo with ID ${id}` });
      return;
    }


    todos.splice(todos.indexOf(todo), 1);
    // res.json(todos);
    res.sendStatus(204);
  });

  app.post("/a5/todos", (req, res) => {
    const newTodo = {
      ...req.body,
      id: new Date().getTime(),
    };
    todos.push(newTodo);
    res.json(newTodo);
  });

  app.get("/a5/todos/create", (req, res) => {
    const newTodo = {
      id: new Date().getTime(),
      title: "New Task",
      completed: false,
    };
    todos.push(newTodo);
    res.json(todos);
  });
  app.get("/a5/todos/:id", (req, res) => {
    const { id } = req.params;
    const todo = todos.find((todo) => todo.id === parseInt(id));
    res.json(todo);
  });

  // http://localhost:3000/a5/todos?completed=true
  app.get("/a5/todos", (req, res) => {
    const { completed, due, assignedTo } = req.query;
    if (completed === "true") {
      const completedTodos = todos.filter((todo) => todo.completed);
      res.json(completedTodos);
      return;
    } else if (completed === "false") {
      const incompletedTodos = todos.filter((todo) => !todo.completed);
      res.json(incompletedTodos);
      return;
    }
    res.json(todos);
  });

  app.get("/a5/assignment", (req, res) => {
    res.json(assignment);
  });
  app.get("/a5/assignment/title", (req, res) => {
    res.json(assignment.title);
  });
  app.get("/a5/assignment/title/:newTitle", (req, res) => {
    const { newTitle } = req.params;
    assignment.title = newTitle;
    res.json(assignment);
  });

  app.get("/a5/calculator", (req, res) => {
    const { a, b, operation } = req.query;
    let result = 0;
    switch (operation) {
      case "add":
        result = parseInt(a) + parseInt(b);
        break;
      case "subtract":
        result = parseInt(a) - parseInt(b);
        break;
      default:
        result = "Invalid operation";
    }
    res.send(result.toString());
  });

  app.get("/a5/add/:a/:b", (req, res) => {
    const { a, b } = req.params;
    const sum = parseInt(a) + parseInt(b);
    res.send(sum.toString());
  });
  app.get("/a5/subtract/:a/:b", (req, res) => {
    const { a, b } = req.params;
    const sum = parseInt(a) - parseInt(b);
    res.send(sum.toString());
  });

  app.get("/a5/welcome", (req, res) => {
    res.send("Welcome to Assignment 5 !!!!!!");
  });
};
export default Lab5;