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 module = {
    id: 1, name: "Web Development",
    description: "Web Development using NodeJS",
    course: "CS 5610 Web Development",
};
const todos = [
    { id: 1, title: "Task 1", completed: false, description: "Create a NodeJS server with ExpressJS", due: "2021-09-09" },
    { id: 2, title: "Task 2", completed: true, description: "Description", due: "2021-09-09"},
    { id: 3, title: "Task 3", completed: false, description: "Description", due: "2021-09-09"},
    { id: 4, title: "Task 4", completed: true, description: "Description", due: "2021-09-09" },
  ]; 
  
const Lab5 = (app) => {
      app.get("/a5/welcome", (req, res) => {
        res.send("Welcome to Assignment 5");
      });   
      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/multiply/:a/:b", (req, res) => {
        const { a, b } = req.params;
        const sum = parseInt(a) * parseInt(b);
        res.send(sum.toString());
      });
      app.get("/a5/divide/:a/:b", (req, res) => {
        const { a, b } = req.params;
        const sum = parseInt(a) / parseInt(b);
        res.send(sum.toString());
      });    
      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;
            case "multiply":
            result = parseInt(a) * parseInt(b);
            break;
            case "divide":
            result = parseInt(a) / parseInt(b);
            break;
            default:
            result = "Invalid operation";
        }
        res.send(result.toString());
      });    
      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/assignment/score/:newScore", (req, res) => {
        const { newScore } = req.params;
        assignment.score = newScore;
        res.json(assignment);
      });
      app.get("/a5/assignment/completed/:newCompleted", (req, res) => {
        const { newCompleted } = req.params;
        assignment.completed = newCompleted;
        res.json(assignment);
      });
      app.get("/a5/module", (req, res) => {
        res.json(module);
      });    
      app.get("/a5/module/name", (req, res) => {
        res.json(module.name);
      });
      app.get("/a5/module/name/:newName", (req, res) => {
        const { newName } = req.params;
        module.name = newName;
        res.json(module);
      });
      app.get("/a5/module/description/:newDescription", (req, res) => {
        const { newDescription } = req.params;
        module.description = newDescription;
        res.json(module);
      });    
      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/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));
        const todoIndex = todos.indexOf(todo);
        if (todoIndex !== -1) {
          todos.splice(todoIndex, 1);
        }
        res.json(todos);
      });
      app.get("/a5/todos/:id/description/:description", (req, res) => {
        const { id, description } = req.params;
        const todo = todos.find((t) => t.id === parseInt(id));
        todo.description = description;
        res.json(todo);
      }); 
      app.get("/a5/todos/:id/completed/:completed", (req, res) => {
        const { id, completed } = req.params;
        const todo = todos.find((t) => t.id === parseInt(id));
        todo.completed = completed;
        res.json(todos);
      }); 
      app.delete("/a5/todos/:id", (req, res) => {
        const { id } = req.params;
        const todo = todos.find((t) => t.id === parseInt(id));
        if (!todo) {
          res.status(404)
            .json({ message: `Unable to delete Todo with ID ${id}` });
          return;
        }    
        todos.splice(todos.indexOf(todo), 1);
        res.sendStatus(200);
      });          
      app.get("/a5/todos/:id", (req, res) => {
        const { id } = req.params;
        const todo = todos.find((t) => t.id === parseInt(id));
        res.json(todo);
      });
      app.put("/a5/todos/:id", (req, res) => {
        const { id } = req.params;
        const todo = todos.find((t) => t.id === parseInt(id));
        if (!todo) {
          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.get("/a5/todos", (req, res) => {
        const { completed } = req.query;
        if (completed !== undefined) {
          const completedBool = completed === "true";
          const completedTodos = todos.filter(
            (t) => t.completed === completedBool);
          res.json(completedTodos);
        return;
        }
        res.json(todos);
      });
      app.post("/a5/todos", (req, res) => {
        const newTodo = {
          ...req.body,
          id: new Date().getTime(),
        };
        todos.push(newTodo);
        res.json(newTodo);
      });
    
    
    
    };
export default Lab5;