updates

Backend/src/models/__init__.py

@@ -16,6 +16,8 @@ from .favorite import Favorite
 from .audit_log import AuditLog
 from .cookie_policy import CookiePolicy
 from .cookie_integration_config import CookieIntegrationConfig
+from .system_settings import SystemSettings
+from .invoice import Invoice, InvoiceItem
 
 __all__ = [
     "Role",
@@ -36,5 +38,8 @@ __all__ = [
     "AuditLog",
     "CookiePolicy",
     "CookieIntegrationConfig",
+    "SystemSettings",
+    "Invoice",
+    "InvoiceItem",
 ]
 

Backend/src/models/booking.py

@@ -35,6 +35,7 @@ class Booking(Base):
     user = relationship("User", back_populates="bookings")
     room = relationship("Room", back_populates="bookings")
     payments = relationship("Payment", back_populates="booking", cascade="all, delete-orphan")
+    invoices = relationship("Invoice", back_populates="booking", cascade="all, delete-orphan")
     service_usages = relationship("ServiceUsage", back_populates="booking", cascade="all, delete-orphan")
     checkin_checkout = relationship("CheckInCheckOut", back_populates="booking", uselist=False)
 

Backend/src/models/invoice.py

@@ -0,0 +1,100 @@
+from sqlalchemy import Column, Integer, String, DateTime, Numeric, Text, Enum, ForeignKey, Boolean
+from sqlalchemy.orm import relationship
+from datetime import datetime
+import enum
+from ..config.database import Base
+
+
+class InvoiceStatus(str, enum.Enum):
+    draft = "draft"
+    sent = "sent"
+    paid = "paid"
+    overdue = "overdue"
+    cancelled = "cancelled"
+
+
+class Invoice(Base):
+    __tablename__ = "invoices"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    invoice_number = Column(String(50), unique=True, nullable=False, index=True)
+    booking_id = Column(Integer, ForeignKey("bookings.id"), nullable=False)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    
+    # Invoice details
+    issue_date = Column(DateTime, default=datetime.utcnow, nullable=False)
+    due_date = Column(DateTime, nullable=False)
+    paid_date = Column(DateTime, nullable=True)
+    
+    # Amounts
+    subtotal = Column(Numeric(10, 2), nullable=False, default=0.00)
+    tax_rate = Column(Numeric(5, 2), nullable=False, default=0.00)  # Tax percentage
+    tax_amount = Column(Numeric(10, 2), nullable=False, default=0.00)
+    discount_amount = Column(Numeric(10, 2), nullable=False, default=0.00)
+    total_amount = Column(Numeric(10, 2), nullable=False)
+    amount_paid = Column(Numeric(10, 2), nullable=False, default=0.00)
+    balance_due = Column(Numeric(10, 2), nullable=False)
+    
+    # Status
+    status = Column(Enum(InvoiceStatus), nullable=False, default=InvoiceStatus.draft)
+    
+    # Company/Organization information (for admin to manage)
+    company_name = Column(String(200), nullable=True)
+    company_address = Column(Text, nullable=True)
+    company_phone = Column(String(50), nullable=True)
+    company_email = Column(String(100), nullable=True)
+    company_tax_id = Column(String(100), nullable=True)
+    company_logo_url = Column(String(500), nullable=True)
+    
+    # Customer information (snapshot at invoice creation)
+    customer_name = Column(String(200), nullable=False)
+    customer_email = Column(String(100), nullable=False)
+    customer_address = Column(Text, nullable=True)
+    customer_phone = Column(String(50), nullable=True)
+    customer_tax_id = Column(String(100), nullable=True)
+    
+    # Additional information
+    notes = Column(Text, nullable=True)
+    terms_and_conditions = Column(Text, nullable=True)
+    payment_instructions = Column(Text, nullable=True)
+    
+    # Metadata
+    created_by_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    updated_by_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)
+    
+    # Relationships
+    booking = relationship("Booking", back_populates="invoices")
+    user = relationship("User", foreign_keys=[user_id], backref="invoices")
+    created_by = relationship("User", foreign_keys=[created_by_id])
+    updated_by = relationship("User", foreign_keys=[updated_by_id])
+    items = relationship("InvoiceItem", back_populates="invoice", cascade="all, delete-orphan")
+
+
+class InvoiceItem(Base):
+    __tablename__ = "invoice_items"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    invoice_id = Column(Integer, ForeignKey("invoices.id"), nullable=False)
+    
+    # Item details
+    description = Column(String(500), nullable=False)
+    quantity = Column(Numeric(10, 2), nullable=False, default=1.00)
+    unit_price = Column(Numeric(10, 2), nullable=False)
+    tax_rate = Column(Numeric(5, 2), nullable=False, default=0.00)
+    discount_amount = Column(Numeric(10, 2), nullable=False, default=0.00)
+    line_total = Column(Numeric(10, 2), nullable=False)
+    
+    # Optional reference to booking items
+    room_id = Column(Integer, ForeignKey("rooms.id"), nullable=True)
+    service_id = Column(Integer, ForeignKey("services.id"), nullable=True)
+    
+    # Metadata
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
+    
+    # Relationships
+    invoice = relationship("Invoice", back_populates="items")
+    room = relationship("Room")
+    service = relationship("Service")
+

Backend/src/models/payment.py

@@ -11,6 +11,7 @@ class PaymentMethod(str, enum.Enum):
     debit_card = "debit_card"
     bank_transfer = "bank_transfer"
     e_wallet = "e_wallet"
+    stripe = "stripe"
 
 
 class PaymentType(str, enum.Enum):

Backend/src/models/room.py

@@ -22,6 +22,9 @@ class Room(Base):
     status = Column(Enum(RoomStatus), nullable=False, default=RoomStatus.available)
     price = Column(Numeric(10, 2), nullable=False)
     featured = Column(Boolean, nullable=False, default=False)
+    capacity = Column(Integer, nullable=True)  # Room-specific capacity, overrides room_type capacity
+    room_size = Column(String(50), nullable=True)  # e.g., "1 Room", "2 Rooms", "50 sqm"
+    view = Column(String(100), nullable=True)  # e.g., "City View", "Ocean View", etc.
     images = Column(JSON, nullable=True)
     amenities = Column(JSON, nullable=True)
     description = Column(Text, nullable=True)

Backend/src/models/system_settings.py

@@ -0,0 +1,21 @@
+from sqlalchemy import Column, Integer, String, DateTime, Text, ForeignKey
+from sqlalchemy.orm import relationship
+from datetime import datetime
+from ..config.database import Base
+
+
+class SystemSettings(Base):
+    """
+    System-wide settings controlled by administrators.
+    Stores key-value pairs for platform configuration like currency, etc.
+    """
+    __tablename__ = "system_settings"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    key = Column(String(100), unique=True, nullable=False, index=True)
+    value = Column(Text, nullable=False)
+    description = Column(Text, nullable=True)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)
+    updated_by_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    updated_by = relationship("User", lazy="joined")
+

Backend/src/models/user.py

@@ -15,6 +15,7 @@ class User(Base):
     phone = Column(String(20), nullable=True)
     address = Column(Text, nullable=True)
     avatar = Column(String(255), nullable=True)
+    currency = Column(String(3), nullable=False, default='VND')  # ISO 4217 currency code
     is_active = Column(Boolean, nullable=False, default=True)
     created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
     updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)