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xSenny

Sep 24th, 2024 (edited)

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from abc import ABC, abstractmethod
from typing import List, Dict, Tuple, Set
class LibraryItem(ABC):
def __init__(self, title: str, id: int):
self._title = title
self._id = id
@abstractmethod
def get_details(self) -> str:
pass
@abstractmethod
def borrow(self) -> None:
pass
@abstractmethod
def return_item(self) -> None:
pass
class Book(LibraryItem):
def __init__(self, title: str, id: int, author: str):
super().__init__(title, id)
self._author = author
self._is_borrowed = False
def get_details(self) -> str:
return f"Book Title: {self._title}, ID: {self._id}, Author: {self._author}"
def borrow(self) -> None:
if not self._is_borrowed:
self._is_borrowed = True
else:
print("This book is already borrowed.")
def return_item(self) -> None:
if self._is_borrowed:
self._is_borrowed = False
else:
print("This book was not borrowed.")
class Magazine(LibraryItem):
def __init__(self, title: str, id: int, issue_number: int):
super().__init__(title, id)
self._issue_number = issue_number
self._is_borrowed = False
def get_details(self) -> str:
return f"Magazine Title: {self._title}, ID: {self._id}, Issue Number: {self._issue_number}"
def borrow(self) -> None:
if not self._is_borrowed:
self._is_borrowed = True
else:
print("This magazine is already borrowed.")
def return_item(self) -> None:
if self._is_borrowed:
self._is_borrowed = False
else:
print("This magazine was not borrowed.")
def display_item_details(items: List[LibraryItem]) -> None:
for item in items:
print(item.get_details())
class Library:
def __init__(self):
self.items: List[LibraryItem] = []
self.borrowed_items: Dict[int, LibraryItem] = {}
self.available_ids: Set[int] = set()
def add_item(self, item: LibraryItem) -> None:
self.items.append(item)
self.available_ids.add(item._id)
def borrow_item(self, item_id: int) -> None:
for item in self.items:
if item._id == item_id:
item.borrow()
self.borrowed_items[item_id] = item
self.available_ids.discard(item_id)
return
print("Item not found.")
def return_item(self, item_id: int) -> None:
if item_id in self.borrowed_items:
item = self.borrowed_items[item_id]
item.return_item()
del self.borrowed_items[item_id]
self.available_ids.add(item_id)
else:
print("Item was not borrowed.")
def display_all_items(self) -> None:
display_item_details(self.items)
def main():
library = Library()
book1 = Book("1984", 1, "George Orwell")
magazine1 = Magazine("National Geographic", 2, 2023)
library.add_item(book1)
library.add_item(magazine1)
print("All Library Items:")
library.display_all_items()
print("\nBorrowing Item ID 1 (1984):")
library.borrow_item(1)
print("\nBorrowing Item ID 2 (National Geographic):")
library.borrow_item(2)
print("\nAll Library Items After Borrowing:")
library.display_all_items()
print("\nReturning Item ID 1 (1984):")
library.return_item(1)
print("\nFinal Library Items:")
library.display_all_items()
main()

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