mohammedjameel24/techolution_assignment

Techolution_Assignment

Redesigned Library Management System Documentation

1. Object-Oriented Design (models.py)

We've introduced three classes to represent essential entities in our system:

• Book: Represents a book with attributes like title, author, and ISBN.
• User: Represents a library user with a name and user ID.
• Checkout: Represents a book checkout, associating a user with an ISBN.

2. File-Based Storage (storage.py)

We've refactored the storage mechanism using JSON files:

• save_to_json(filename, data): Saves data (e.g., books, users) to a JSON file.
• load_from_json(filename): Loads data from a JSON file or returns an empty list if the file doesn't exist.

3. User Input via CLI (main.py)

The main script (main.py) provides a user-friendly CLI interface:

• Users can add books, list books, add users, and check out books.
• The main_menu() function displays available options.

4. Error Handling and Input Validation

We've implemented basic error handling and input validation:

• Invalid choices are handled gracefully.
• Users are prompted for input (e.g., title, author, ISBN, user name, user ID).

5. Modularity and Scalability

Our design allows for easy extension and modification:

• New item types (e.g., DVDs, magazines) can be added by creating additional classes.
• Features like due dates, late fees, etc., can be incorporated without major changes.

Refactored Code Overview

• book.py: Manages books.
  • BookManagement class handles book-related operations.
  • Methods: add_book(title, author, isbn), list_books().
• user.py: Manages users.
  • UserManagement class handles user-related operations.
  • Methods: add_user(name, user_id), list_users().
• checkout.py: Manages book checkouts.
  • CheckoutManagement class handles checkout-related operations.
  • Methods: checkout_book(user_id, isbn), list_checkouts().
• main.py: Main script for user interaction.
  • Displays menu options and invokes relevant methods.