Isaac's Library Module

This node module provides essential functionality for a library book borrowing service. With this module, book readers can create accounts and borrow books with ease.

Installation

Before starting, make sure you have downloaded and installed Node.js. This node module has been tested with Node.js v16.17.0.

Install iz-library with the npm install command:

npm install iz-library

If you have cloned this module from GitHub, install the module dependencies with the npm install command.

Getting Started

Start by requiring the module in your project:

const library = require('iz-library')

If you have cloned this module from GitHub, include the module with require as follows:

const library = require('./IsaacKoh_Library');

Books

1. Add Book(s)

Takes in an object and adds the specified number of books to the library. The object has to have a name, author and quantity.

const newBook = library.books.add({
    name: 'The New Book',
    author: 'Francis Mellow',
    quantity: 2
});
console.log(newBook);

2. Get all Books

Returns an array of all books currently in the library. The array will not include books that have been borrowed.

const allBooks = library.books.getAll();
console.log(JSON.stringify(allBooks, null, 2));

3. Search Book by Name

Returns an array of all books with names containing the search text. It is not case-sensitive.

const nameSearch = library.books.searchName('the M');
console.log(JSON.stringify(nameSearch, null, 2));

4. Get borrowed Books

Returns an array of all books borrowed from the library.

const allBorrowed = library.books.getAllBorrowed();
console.log(JSON.stringify(allBorrowed, null, 2));

5. Get Books borrowed by User

Takes in a user_id and returns an array containing all books borrowed by the user.

const userBorrows = library.books.getUserBorrows("b2b1b3b4-3a3a-4b4b-9c9c-2d2d2d2d2d2d");
console.log(JSON.stringify(userBorrows, null, 2));

6. Borrow Book

Takes in a userId, bookName and quantity. The quantity specifies the number of said book to borrow.

const borrowBook = library.books.borrow("b2b1b3b4-3a3a-4b4b-9c9c-2d2d2d2d2d2d", "The Secret Code", 2);
console.log(JSON.stringify(borrowBook, null, 2));

• Each user can only borrow up to 2 of the same book

7. Return Book

Takes in a userId, bookName and quantity. The quantity specifies the number of said book to return.

const returnBook = library.books.returnBook("b2b1b3b4-3a3a-4b4b-9c9c-2d2d2d2d2d2d", "The Secret Code", 1);
console.log(JSON.stringify(returnBook, null, 2));

Users

1. Register

Takes in an object and adds it as a new user to the library. Each object has to have an email, username and password.

const newUser = library.users.register({
    email: '[email protected]',
    username: 'bob',
    password: 'p@ssw0rd'
});
console.log(JSON.stringify(newUser, null, 2));

• Each email is unique to an account
• Usernames cannot contain whitespaces
• Passwords have to be at least 8 characters long, containing an alphabet, number and symbol

2. Log in

Authenticates user based on their email and password. Returns an array containing a message and an object containing the user data if the provided credentials are valid.

const loginUser = library.users.login('[email protected]', 'p@ssw0rd');
console.log(JSON.stringify(loginUser, null, 2));

3. Get User by ID

Takes in a userId and returns an object containing specified user data.

const userById = library.users.getById("c5c6c7c8-1b1b-4c4c-7d7d-3e3e3e3e3e3e");
console.log(JSON.stringify(userById, null, 2));

4. Get User by Email

Takes in an email and returns an object containing specified user data.

const userByEmail = library.users.getByEmail("[email protected]");
console.log(JSON.stringify(userByEmail, null, 2));