This program is a simple RESTful CRUD (Create, Read, Update, Delete) API for a library management system using the Go programming language and the Gin web framework. Gin is a high-performance HTTP web framework that makes it easy to build robust APIs. It demonstrates how to build an API server with endpoints for managing a collection of books. The program uses the Gin package to handle HTTP routing, middleware, and JSON encoding/decoding.

The source code can be found at: URL GitHub

• Create a new book
• Retrieve all books
• Retrieve a single book by ID
• Update a book by ID
• Delete a book by ID
• Check out a book
• Return a book

To run this program, you will need to install the Gin web framework package:

go get -u github.com/gin-gonic/gin

The program uses two main data structures:

• book: Represents a book with the following fields:
  • ID: Unique identifier for the book
  • Title: Title of the book
  • Author: Author of the book
  • Quantity: Number of copies of the book in the library

The API has the following endpoints:

• GET /books: Retrieve all books
• GET /books/:id: Retrieve a single book by ID
• PUT /books: Create a new book
• PATCH /checkout: Check out a book
• PATCH /return: Return a book
• DELETE /books/:id: Delete a book by ID

To run the program, execute the following command:

go run main.go

The API will start listening on port 8080. The Gin framework provides efficient request handling, easy middleware integration, and graceful error handling, making the development process smooth and enjoyable.