Library Web Service

About

The Library Web Service is a full-stack application designed to manage a library's authors and books. This project serves as a practical implementation of a GraphQL API using the Spring Boot framework in Java for the backend, and a simple webpage using HTML, CSS, and JavaScript for the frontend.

Objective

The primary objective of this project is to learn and implement GraphQL in a real-world application. By building this Library Web Service, we aim to:

• Understand the fundamentals of GraphQL and how it differs from REST APIs.
• Gain hands-on experience with Spring Boot for creating a GraphQL server.
• Develop a responsive and interactive frontend using HTML, CSS, and JavaScript.
• Learn how to make API calls to a GraphQL server and handle responses effectively.

The Server (Backend)

The backend is implemented as a GraphQL API which follows the given schema for Queries (to fetch data) & Mutations (to modify data):

# To fetch data
type Query {
	authors: [Author]
	authorById(id: ID!): Author
	
	books: [Book]
	bookById(id: ID!): Book
}

# To modify data
type Mutation {
	addAuthor(author: AuthorInput!): Author

	addBook(book: BookInput!): Book
	updateBook(id: ID!, book: BookInput!): Book
	deleteBook(id: ID!): Boolean
}

# Input type definition
# '!' indicates required field
input BookInput {
	title: String!	
	pageCount: Int
	authorId: ID!
}

input AuthorInput {
	name: String!
}

type Author {
	id: ID!		
	name: String!
	books: [Book]
}

type Book {
	id: ID!
	title: String!
	pageCount: Int
	author: Author!
}

The Client (Frontend)

The frontend is designed as a single-page application, featuring the following previews:

Preview-1

Preview-2