hyte-web-dev

Node.js & Express development continues

• Getting started with Node.js - Node.js official documentation
• Express.js - Express.js official documentation

Creating a REST API with mock data

1. Continue the Node project started last week (git checkout week1). Create a new git branch week2 and choose it (git checkout -b week2).
2. Make sure you have all packages (listed as dependencies in package.json) installed (npm install).
3. Create a new module file src/items.js
   • move the items mock data array from src/index.js to the new module file

   • create a new function getItems() in the module and export it

      const getItems = (req, res) => {
        res.json(items);
      }
      export {getItems};
     

   • import the getItems() function in src/index.js and use it to get the items data by modifying the GET /items endpoint

      import {getItems} from './items.js';
      ...
      app.get('/items', getItems);
     

   • do the same for the GET /items/:id and POST /items endpoints (create functions in src/items.js and import and use them in src/index.js)
4. Implement a functional simple example REST API endpoints for the item mock data in src/items.js. For example:
   • Adding an item should push a new item object to the mock data array
     • See the example of reading POST body data in JSON format
   • Deleting an item should delete the item object with matching id
   • Invalid http requests should be responded with appropriate messages and status codes

5. Create a new module file src/users.js and add the following mock data to it:

    const users = [
      {
        id: 1,
        username: "johndoe",
        password: "password1",
        email: "johndoe@example.com"
      },
      {
        id: 2,
        username: "janedoe",
        password: "password2",
        email: "janedoe@example.com"
      },
      {
        id: 3,
        username: "bobsmith",
        password: "password3",
        email: "bobsmith@example.com"
      }
    ];
   

6. Design and implement API endpoints for users resource using the mock data provided
   • figure out and add correct status codes and corresponding messages or data to the responses
   • use POST method to create a new user
   • use GET method to get a specific user
   • create a dummy login endpoint using POST method
     • check that the username and password match and return a success message if they do or an error message if they don’t
7. Import and use the users module in src/index.js to register the new endpoints

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Week assignment 2

Follow the teacher’s example (“Creating a REST API with mock data” section above, link to the example code is in Oma). Implement TODOs marked in code comments in the teacher’s lecture example code. See assignment details in Oma.