Key Features

1. Book Addition

• Add New Book: Register a book that’s not already in the system with endpoint /api/add-new-book.
• Add Copies to Existing Book: Update the inventory of an existing book with endpoint /api/add-book.

2. Fetch Book Details

• Get Book by ID: Retrieve book details by its ID with endpoint /api/book/{id}.
• Get All Books: List all registered books via /api/book-list.
• Get Number of Books Available by ID: Use /api/number-of-books/{id} to find the available count.

3. Update Book Details

Update book information using the endpoint /api/books/{id}.

4. Selling Books

• Sell a Single Book: Endpoint /api/sell-book/{id} sells one copy of a book by its ID.
• Sell Multiple Books: Use /api/sell-books to process multiple book sales.

5. Advanced Search

• Search by Category and Keyword: /api/books?keyword=keyword&category=category searches books based on category and keyword.
• Get Sales Data: /api/number-of-books?keyword=keyword&category=category retrieves the number of books sold per category.