.env.example

@@ -1,4 +0,0 @@
-DB_USER=
-DB_NAME=
-DB_PASSWORD=
-DB_HOST=

.vscode/launch.json

@@ -1,15 +0,0 @@
-{
-    // Use IntelliSense to learn about possible attributes.
-    // Hover to view descriptions of existing attributes.
-    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "name": "Python Debugger: Current File",
-            "type": "debugpy",
-            "request": "launch",
-            "program": "${workspaceFolder}/src/app.py",
-            "console": "integratedTerminal"
-        }
-    ]
-}

README.md

@@ -36,10 +36,4 @@ My solution will use the following tech stack:
 4. **SqlAlchemy** for database management
 5. **`python-dotenv`** for configurability
 
-The problem in question will be demonstrated on a library application
+The problem in question will be demonstrated on a library application
-
-## Sources
-1. [Qt documentation for pyside2](https://doc.qt.io/qtforpython-5/PySide2/QtWidgets)
-1. [Qt documentation for PySide6](https://doc.qt.io/qtforpython-6/PySide6/QtWidgets/)
-2. [Pythontutorial.net](https://www.pythontutorial.net/pyqt/pyqt-qtoolbar/)
-3. [Docs.sqlalchemy.org](https://docs.sqlalchemy.org/)

requirements.txt

@@ -1,13 +1,11 @@
 greenlet==3.1.1
 mypy==1.14.1
 mypy-extensions==1.0.0
-mysql-connector-python==9.1.0
 PySide6==6.8.1
 PySide6_Addons==6.8.1
 PySide6_Essentials==6.8.1
 python-dotenv==1.0.1
 shiboken2==5.13.2
 shiboken6==6.8.1
-SQLAlchemy==2.0.36
 sqlalchemy-stubs==0.4
 typing_extensions==4.12.2

src/app.py

@@ -1,39 +1,56 @@
-import sys
+# import sys
-from PySide6 import QtWidgets, QtCore
+# from PySide6.QtGui import QGuiApplication
+# from PySide6.QtQml import QQmlApplicationEngine
+
+# if __name__ == "__main__":
+#     app = QGuiApplication(sys.argv)
+#     engine = QQmlApplicationEngine()
+#     engine.addImportPath(sys.path[0])
+#     engine.loadFromModule("ui", "Main")
+#     if not engine.rootObjects():
+#         sys.exit(-1)
+#     exit_code = app.exec()
+#     del engine
+#     sys.exit(exit_code)
 
 
-from ui.dashboard import LibraryDashboard
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
 
+from models.book import Book, BookStatusEnum
+from models.author import Author
 
-if __name__ == "__main__":
+# Replace with your MySQL database credentials
-    app = QtWidgets.QApplication([])
+DATABASE_URI = 'mysql+mysqlconnector://username:password@localhost:3306/library'
-    window = LibraryDashboard()
-    window.show()
-    sys.exit(app.exec())
 
-# from sqlalchemy import create_engine
+# Create the engine
-# from sqlalchemy.orm import sessionmaker
+engine = create_engine(DATABASE_URI, echo=True)
 
-# from models.book import Book, BookStatusEnum
+# Create a configured session class
-# from models.author import Author
+SessionLocal = sessionmaker(bind=engine)
 
-# # Replace with your MySQL database credentials
+# Create a session instance
-# DATABASE_URI = 'mysql+mysqlconnector://username:password@localhost:3306/library'
+session = SessionLocal()
 
-# # Create the engine
+new_author = Author(first_name="John", last_name="Doe")
-# engine = create_engine(DATABASE_URI)
 
-# from models.base import Base
+session.add(new_author)
-# Base.metadata.create_all(engine)
+session.commit()
 
-# # Create a configured session class
+new_book = Book(
-# SessionLocal = sessionmaker(bind=engine)
+    title="Sample Book",
+    description="A fascinating tale.",
+    year_published="2023",
+    isbn="1234567890123",
+    status='available',
+    author_id=new_author.id
+)
 
-# # Create a session instance
+session.add(new_book)
-# session = SessionLocal()
+session.commit()
 
-# books = session.query(Book).all()
+books = session.query(Book).all()
-# for book in books:
+for book in books:
-#     print(book.title, book.author.first_name)
+    print(book.title, book.author.first_name)
 
-# session.close()
+session.close()

src/models/__init__.py

@@ -1,10 +1,7 @@
-from .base import Base
 from .author import Author
-from .book import Book
 from .book_category import BookCategory
+from .book import Book
 from .book_category_link import BookCategoryLink
 from .member import Member
 from .librarian import Librarian
-from .loan import Loan
+from .loan import Loan
-
-__all__ = ["Author", "Book", "BookCategory", "BookCategoryLink", "Member", "Librarian", "Loan"]

src/models/author.py

@@ -1,17 +1,15 @@
 from sqlalchemy import Column, Integer, String, TIMESTAMP, UniqueConstraint, func
 from sqlalchemy.orm import relationship
+from sqlalchemy.ext.declarative import declarative_base
 
-from .base import Base
+Base = declarative_base()
 
 
 class Author(Base):
-    __tablename__ = 'author'
+    __tablename__  = 'author'
     __table_args__ = (UniqueConstraint('id'),)
 
-    id = Column(Integer, primary_key=True, autoincrement=True)
+    id           = Column(Integer, primary_key=True, autoincrement=True)
-    first_name = Column(String(50), nullable=False)
+    first_name   = Column(String(50), nullable=False)
-    last_name = Column(String(50), nullable=False)
+    last_name    = Column(String(50), nullable=False)
     last_updated = Column(TIMESTAMP, nullable=False, server_default=func.now())
-
-    # Reference 'Book' as a string to avoid direct import
-    books = relationship('Book', back_populates='author')

src/models/base.py

@@ -1,3 +0,0 @@
-from sqlalchemy.ext.declarative import declarative_base
-
-Base = declarative_base()

src/models/book.py

@@ -2,8 +2,12 @@ import enum
 
 from sqlalchemy import Column, Integer, String, TIMESTAMP, Text, ForeignKey, Enum, UniqueConstraint, func
 from sqlalchemy.orm import relationship
+from sqlalchemy.ext.declarative import declarative_base
 
-from .base import Base
+from .author import Author
+from .book_category import BookCategory
+
+Base = declarative_base()
 
 
 class BookStatusEnum(enum.Enum):
@@ -11,20 +15,18 @@ class BookStatusEnum(enum.Enum):
     borrowed = 'borrowed'
     reserved = 'reserved'
 
-
 class Book(Base):
-    __tablename__ = 'book'
+    __tablename__  = 'book'
     __table_args__ = (UniqueConstraint('isbn'),)
 
-    id = Column(Integer, primary_key=True, autoincrement=True)
+    id             = Column(Integer, primary_key=True, autoincrement=True)
-    author_id = Column(Integer, ForeignKey('author.id'), nullable=False)
+    author_id      = Column(Integer, ForeignKey('author.id'), nullable=False)
-    title = Column(String(100), nullable=False)
+    title          = Column(String(100), nullable=False)
-    description = Column(Text, nullable=False)
+    description    = Column(Text, nullable=False)
     year_published = Column(String(4), nullable=False)
-    isbn = Column(String(13), nullable=False, unique=True)
+    isbn           = Column(String(13), nullable=False, unique=True)
-    status = Column(Enum(BookStatusEnum), nullable=False, default=BookStatusEnum.available)
+    status         = Column(Enum(BookStatusEnum), nullable=False, default=BookStatusEnum.available)
-    created_at = Column(TIMESTAMP, nullable=False, server_default=func.now())
+    created_at     = Column(TIMESTAMP, nullable=False, server_default=func.now())
-    last_updated = Column(TIMESTAMP, nullable=False, server_default=func.now())
+    last_updated   = Column(TIMESTAMP, nullable=False, server_default=func.now())
 
-    # Reference 'Author' as a string to avoid direct import
+    author = relationship('Author', backref='books')
-    author = relationship('Author', back_populates='books')

src/models/book_category.py

@@ -1,7 +1,9 @@
 from sqlalchemy import Column, Integer, String, TIMESTAMP, ForeignKey, UniqueConstraint, func
 from sqlalchemy.orm import relationship
+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()
 
-from .base import Base
 
 class BookCategory(Base):
     __tablename__  = 'book_category'

src/models/book_category_link.py

@@ -1,9 +1,12 @@
 from sqlalchemy import Column, Integer, ForeignKey
 from sqlalchemy.orm import relationship
+from sqlalchemy.ext.declarative import declarative_base
+
 
 from .book import Book
 from .book_category import BookCategory
-from .base import Base
+
+Base = declarative_base()
 
 class BookCategoryLink(Base):
     __tablename__ = 'book_category_link'

src/models/librarian.py

@@ -2,8 +2,10 @@ import enum
 
 from sqlalchemy import Column, Integer, String, TIMESTAMP, Text, ForeignKey, Enum, UniqueConstraint, func
 from sqlalchemy.orm import relationship
+from sqlalchemy.ext.declarative import declarative_base
 
-from .base import Base
+
+Base = declarative_base()
 
 
 class LibrarianStatusEnum(enum.Enum):

src/models/loan.py

@@ -2,12 +2,14 @@ import enum
 
 from sqlalchemy import Column, Integer, String, TIMESTAMP, Text, ForeignKey, Enum, UniqueConstraint, Float, func
 from sqlalchemy.orm import relationship
+from sqlalchemy.ext.declarative import declarative_base
 
-from .base import Base
 from .book import Book
 from .member import Member
 from .librarian import Librarian
 
+Base = declarative_base()
+
 
 class LoanStatusEnum(enum.Enum):
     borrowed = 'borrowed'

src/models/member.py

@@ -2,14 +2,13 @@ import enum
 
 from sqlalchemy import Column, Integer, String, TIMESTAMP, Text, ForeignKey, Enum, UniqueConstraint, func
 from sqlalchemy.orm import relationship
-
+from sqlalchemy.ext.declarative import declarative_base
-from .base import Base
-
 
 class MemberStatusEnum(enum.Enum):
     active = 'active'
     inactive = 'inactive'
 
+Base = declarative_base()
 
 class Member(Base):
     __tablename__  = 'member'

src/ui/Main.qml

@@ -0,0 +1,32 @@
+import QtQuick
+import QtQuick.Controls
+import QtQuick.Layouts
+
+Window {
+    width: 300
+    height: 200
+    visible: true
+    title: "Hello World"
+
+    readonly property list<string> texts: ["Hallo Welt", "Hei maailma", "Hola Mundo", "Привет мир"]
+
+    function setText() {
+        var i = Math.round(Math.random() * 3);
+        text.text = texts[i];
+    }
+
+    ColumnLayout {
+        anchors.fill: parent
+
+        Text {
+            id: text
+            text: "Hello World"
+            Layout.alignment: Qt.AlignHCenter
+        }
+        Button {
+            text: "Click me"
+            Layout.alignment: Qt.AlignHCenter
+            onClicked: setText()
+        }
+    }
+}

src/ui/dashboard.py

@@ -1,125 +0,0 @@
-from PySide6.QtGui import QGuiApplication, QAction
-from PySide6.QtQml import QQmlApplicationEngine
-from PySide6 import QtWidgets, QtCore
-
-from ui.settings import SettingsDialog
-
-class LibraryDashboard(QtWidgets.QMainWindow):
-    def __init__(self):
-        super().__init__()
-
-        # Set up main window properties
-        self.setWindowTitle("Library Dashboard")
-        self.setGeometry(100, 100, 400, 400)
-
-        # Set up menu bar
-        self.create_menu_bar()
-
-        # Central widget and layout
-        central_widget = QtWidgets.QWidget()
-        self.setCentralWidget(central_widget)
-        main_layout = QtWidgets.QVBoxLayout(central_widget)
-
-        # Title label
-        title_label = QtWidgets.QLabel("Library Dashboard", self)
-        title_label.setAlignment(QtCore.Qt.AlignCenter)
-        title_label.setStyleSheet("font-size: 20px; font-weight: bold; color: #0078D4;")
-        main_layout.addWidget(title_label)
-
-        # Available books list
-        available_label = QtWidgets.QLabel("Available Books")
-        available_label.setStyleSheet("font-size: 16px;")
-        main_layout.addWidget(available_label)
-
-        self.available_books_list = QtWidgets.QListWidget()
-        self.available_books_list.addItems(["Book One", "Book Two", "Book Three", "Book Four","Book One", "Book Two", "Book Three", "Book Four","Book One", "Book Two", "Book Three", "Book Four"])
-        self.available_books_list.itemClicked.connect(self.edit_book)
-        main_layout.addWidget(self.available_books_list)
-
-        # Borrowed books list
-        borrowed_label = QtWidgets.QLabel("Currently Borrowed Books")
-        borrowed_label.setStyleSheet("font-size: 16px;")
-        main_layout.addWidget(borrowed_label)
-
-        self.borrowed_books_list = QtWidgets.QListWidget()
-        self.borrowed_books_list.addItems(["Book Two", "Book Four"])
-        self.borrowed_books_list.itemClicked.connect(self.return_book)
-        main_layout.addWidget(self.borrowed_books_list)
-
-        # Buttons for actions
-        button_layout = QtWidgets.QHBoxLayout()
-        register_member_button = QtWidgets.QPushButton("Add New Member")
-        register_member_button.clicked.connect(self.register_member)
-        button_layout.addWidget(register_member_button)
-
-        add_borrow_record_button = QtWidgets.QPushButton("Add Borrow Record")
-        add_borrow_record_button.clicked.connect(self.add_borrow_record)
-        button_layout.addWidget(add_borrow_record_button)
-
-        main_layout.addLayout(button_layout)
-
-    # Slots for button actions
-    def edit_book(self, item):
-        QtWidgets.QMessageBox.information(self, "Edit Book", f"Edit details for '{item.text()}'.")
-
-    def return_book(self, item):
-        QtWidgets.QMessageBox.information(self, "Return Book", f"Mark '{item.text()}' as returned.")
-
-    def register_member(self):
-        QtWidgets.QMessageBox.information(self, "Add Member", "Open dialog to register a new member.")
-
-    def add_borrow_record(self):
-        QtWidgets.QMessageBox.information(self, "Add Borrow Record", "Open dialog to add a borrow record.")
-
-    def create_menu_bar(self):
-        # Create the menu bar
-        menu_bar = self.menuBar()
-
-        # File menu
-        file_menu = menu_bar.addMenu("File")
-
-        import_action = QAction("Import", self)
-        import_action.triggered.connect(self.import_data)
-        file_menu.addAction(import_action)
-
-
-        export_action = QAction("Export", self)
-        export_action.triggered.connect(self.export_data)
-        file_menu.addAction(export_action)
-
-        file_menu.addSeparator()
-
-        exit_action = QAction("Exit", self)
-        exit_action.triggered.connect(self.close)
-        file_menu.addAction(exit_action)
-
-        # Edit menu
-        edit_menu = menu_bar.addMenu("Edit")
-
-        preferences = QAction("Preferences", self)
-        preferences.triggered.connect(self.edit_preferences)
-        edit_menu.addAction(preferences)
-
-        # Help menu
-        help_menu = menu_bar.addMenu("Help")
-        about_action = QAction("About", self)
-        about_action.triggered.connect(self.about)
-        help_menu.addAction(about_action)
-
-    # Menu action slots
-    def edit_preferences(self):
-        dialog = SettingsDialog(parent=self)
-        if dialog.exec() == QtWidgets.QDialog.Accepted:
-            print("Settings were saved.")
-
-    def open_file(self):
-        QtWidgets.QMessageBox.information(self, "Open File", "Open an existing file.")
-
-    def import_data(self):
-        pass
-
-    def export_data(self):
-        pass
-
-    def about(self):
-        QtWidgets.QMessageBox.information(self, "About", "Library Dashboard v1.0\nDeveloped by You.")

src/ui/qmldir

@@ -0,0 +1,2 @@
+module Example
+Main 254.0 Main.qml

src/ui/settings.py

@@ -1,71 +0,0 @@
-import sys
-
-from PySide6 import QtWidgets
-
-class SettingsDialog(QtWidgets.QDialog):
-    def __init__(self, parent=None):
-        super().__init__(parent)
-
-        self.setWindowTitle("Settings")
-        self.setMinimumSize(400, 300)
-
-        # Position the dialog relative to the parent (main window)
-        if parent:
-            x = parent.geometry().x() + parent.geometry().width() // 2 - self.width() // 2
-            y = parent.geometry().y() + parent.geometry().height() // 2 - self.height() // 2
-            self.move(x, y)
-
-        # Create layout
-        layout = QtWidgets.QVBoxLayout(self)
-
-        # Checkbox: Enable Notifications
-        self.notifications_checkbox = QtWidgets.QCheckBox("Enable Notifications")
-        layout.addWidget(self.notifications_checkbox)
-
-        # Checkbox: Dark Mode
-        self.dark_mode_checkbox = QtWidgets.QCheckBox("Enable Dark Mode")
-        layout.addWidget(self.dark_mode_checkbox)
-
-        # Dropdown: Language Selection
-        self.language_label = QtWidgets.QLabel("Language:")
-        layout.addWidget(self.language_label)
-
-        self.language_dropdown = QtWidgets.QComboBox()
-        self.language_dropdown.addItems(["English", "Spanish", "French", "German"])
-        layout.addWidget(self.language_dropdown)
-
-        # Dropdown: Theme Selection
-        self.theme_label = QtWidgets.QLabel("Theme:")
-        layout.addWidget(self.theme_label)
-
-        self.theme_dropdown = QtWidgets.QComboBox()
-        self.theme_dropdown.addItems(["Light", "Dark", "System Default"])
-        layout.addWidget(self.theme_dropdown)
-
-        # Buttons
-        button_layout = QtWidgets.QHBoxLayout()
-        
-        self.save_button = QtWidgets.QPushButton("Save")
-        self.save_button.clicked.connect(self.save_settings)
-        button_layout.addWidget(self.save_button)
-
-        self.cancel_button = QtWidgets.QPushButton("Cancel")
-        self.cancel_button.clicked.connect(self.reject)
-        button_layout.addWidget(self.cancel_button)
-
-        layout.addLayout(button_layout)
-
-    def save_settings(self):
-        # Example of how to fetch settings
-        notifications = self.notifications_checkbox.isChecked()
-        dark_mode = self.dark_mode_checkbox.isChecked()
-        language = self.language_dropdown.currentText()
-        theme = self.theme_dropdown.currentText()
-
-        print("Settings Saved:")
-        print(f"Notifications: {notifications}")
-        print(f"Dark Mode: {dark_mode}")
-        print(f"Language: {language}")
-        print(f"Theme: {theme}")
-
-        self.accept()