Build a Bookstore REST API

Build an API for managing a bookstore inventory. The API allows listing books with pagination and filtering, fetching individual books, adding new books, updating existing books, and deleting books.

Endpoints

• GET /api/books

  • Query parameters: page (optional integer, minimum 1, default 1), limit (optional integer, min 1, max 50, default 10), genre (optional string), minPrice (optional number), maxPrice (optional number).
  • Responds with 200 OK and JSON:
    jsonCopy

    { "data": [ { "id": "1", "title": "The Hobbit", "author": "J.R.R. Tolkien", "genre": "fantasy", "price": 14.99, "stock": 25 } ], "pagination": { "page": 1, "limit": 10, "totalItems": 1, "totalPages": 1 } }
  • Returns 400 Bad Request with {"error": "Invalid query parameters"} if page or limit are not positive integers or if limit exceeds 50.

• GET /api/books/:id

  • Responds with 200 OK and the book object if found.
  • Responds with 404 Not Found and {"error": "Book not found"} if no book exists with that ID.

• POST /api/books

  • Accepts JSON body: title (required string), author (required string), genre (required string), price (required positive number), stock (required non-negative integer).
  • Responds with 201 Created, a Location header set to /api/books/:id, and the created book object.
  • Responds with 400 Bad Request and {"error": "Validation error"} if any required fields are missing, invalid, or empty strings.

• PUT /api/books/:id

  • Accepts JSON body replacing book fields: title, author, genre, price, stock (all required, same validation rules as POST).
  • Responds with 200 OK and the updated book object.
  • Responds with 404 Not Found and {"error": "Book not found"} if the book does not exist.
  • Responds with 400 Bad Request and {"error": "Validation error"} on invalid payload.

• DELETE /api/books/:id

  • Responds with 204 No Content on successful deletion.
  • Responds with 404 Not Found and {"error": "Book not found"} if the book does not exist.

Requirements

• The store exports pre-populated books in src/store.js as an array.
• Book IDs should be strings generated incrementally or deterministically (e.g., string representation of next auto-increment integer ID).
• Filtering by genre must be case-insensitive exact match.
• minPrice and maxPrice filters must filter books inclusively.
• Pagination results must be sorted deterministically by string id in ascending numerical order.