Homework lection2 dmitriy shibishiy v2

library.json

@@ -0,0 +1 @@
+[{"title": "Nature", "author": "Various", "year": 2021}, {"title": "Nature", "author": "Various", "year": 2021}, {"title": "1984", "author": "George Orwell", "year": 1949}, {"title": "Nature", "author": "Various", "year": 2021}, {"title": "1984", "author": "George Orwell", "year": 1949}, {"title": "Nature", "author": "Various", "year": 2021}, {"title": "Nature", "author": "Various", "year": 2021}, {"title": "1984", "author": "George Orwell", "year": 1949}, {"title": "Nature", "author": "Various", "year": 2021}]

main.py

@@ -14,3 +14,4 @@ def print_hi(name):
     print_hi('PyCharm')
 
 # See PyCharm help at https://www.jetbrains.com/help/pycharm/
+

work1.py

@@ -0,0 +1,145 @@
+from pydantic import BaseModel
+from typing import List, Optional
+import json
+import os
+
+class BookModel(BaseModel):
+    title: str
+    author: str
+    year: int
+
+class Book:
+    def __init__(self, model: BookModel):
+        self._model = model
+
+    def __str__(self):
+        return f"{self._model.title} by {self._model.author} ({self._model.year})"
+########################################
+
+class Library:
+    def __init__(self):
+        self._books = []
+
+    def add_book(self, book: Book):
+        self._books.append(book)
+
+    def remove_book(self, book: Book):
+        self._books.remove(book)
+
+    def __iter__(self):
+        return iter(self._books)
+
+    def books_by_author(self, author: str):
+        for book in self._books:
+            if book._model.author == author:
+                yield book
+
+    def __str__(self):
+        return "\n".join(str(book) for book in self._books)
+
+from functools import wraps
+
+def log_action(action):
+    def decorator(func):
+        @wraps(func)
+        def wrapper(self, book: Book):
+            result = func(self, book)
+            print(f"{action} book: {book}")
+            return result
+        return wrapper
+    return decorator
+
+def check_book_exists(func):
+    @wraps(func)
+    def wrapper(self, book: Book):
+        if book in self._books:
+            return func(self, book)
+        else:
+            print(f"Book not found: {book}")
+    return wrapper
+
+class LibraryFileManager:
+    def __init__(self, filepath: str, library: Library):
+        self.filepath = filepath
+        self.library = library
+
+    def __enter__(self):
+        if os.path.exists(self.filepath):
+            with open(self.filepath, 'r') as file:
+                books_data = json.load(file)
+                for book_data in books_data:
+                    book_model = BookModel(**book_data)
+                    self.library.add_book(Book(book_model))
+        return self.library
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        with open(self.filepath, 'w') as file:
+            books_data = [book._model.dict() for book in self.library]
+            json.dump(books_data, file)
+
+
+class Journal(Book):
+    def __init__(self, model: BookModel, issue: int):
+        super().__init__(model)
+        self.issue = issue
+
+    def __str__(self):
+        return f"{self._model.title} by {self._model.author} (Issue {self.issue}, {self._model.year})"
+
+from abc import ABC, abstractmethod
+
+class Printable(ABC):
+    @abstractmethod
+    def print_details(self):
+        pass
+
+class BookWithPrint(Book, Printable):
+    def print_details(self):
+        print(f"Book: {self._model.title}, Author: {self._model.author}, Year: {self._model.year}")
+
+class JournalWithPrint(Journal, Printable):
+    def print_details(self):
+        print(f"Journal: {self._model.title}, Author: {self._model.author}, Issue: {self.issue}, Year: {self._model.year}")
+
+
+if __name__ == "__main__":
+    library = Library()
+
+    # Створення книги та журналу
+    book_model = BookModel(title="1984", author="George Orwell", year=1949)
+    book = BookWithPrint(book_model)
+
+    journal_model = BookModel(title="Nature", author="Various", year=2021)
+    journal = JournalWithPrint(journal_model, issue=102)
+
+    # Додавання книг до бібліотеки
+    library.add_book(book)
+    library.add_book(journal)
+
+    # Виведення списку книг у бібліотеці
+    print("Library books:")
+    print(library)
+
+    # Виведення книг по імені автора
+    print("\nBooks by George Orwell:")
+    for book in library.books_by_author("George Orwell"):
+        print(book)
+
+    # Збереження списку книг у файл
+    with LibraryFileManager("library.json", library):
+        pass
+
+    # Видалення книги з бібліотеки
+    library.remove_book(book)
+
+    # Виведення списку книг після видалення
+    print("\nLibrary books after removing:")
+    print(library)
+
+    # Додавання книг з файлу в бібліотеку
+    with LibraryFileManager("library.json", library):
+        pass
+
+    # Виведення списку книг після додавання з файлу
+    print("\nLibrary books after loading from file:")
+    print(library)