first commit

models.py

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+from dataclasses import dataclass
+from datetime import datetime
+from typing import Optional
+
+@dataclass
+class Address:
+    """Address information for tax calculations"""
+    province: str
+    city: str
+    postal_code: str
+    country: str = "Canada"
+
+@dataclass
+class Receipt:
+    id: str
+    file_name: str
+    upload_date: datetime
+    receipt_date: datetime
+    amount: float
+    tax: float
+    vendor: str
+    category: str
+    description: str
+    # Tax rule fields
+    billing_address: Optional[Address] = None
+    shipping_address: Optional[Address] = None
+    currency: str = "CAD"
+    is_meals_entertainment: bool = False
+    
+@dataclass
+class Transaction:
+    id: str
+    transaction_date: datetime
+    amount: float
+    vendor: str
+    notes: str
+    # Tax rule fields
+    currency: str = "CAD"
+    fx_rate: Optional[float] = None
+    
+@dataclass
+class Asset:
+    """Asset for depreciation calculations"""
+    id: str
+    name: str
+    purchase_date: datetime
+    purchase_amount: float
+    useful_life_years: int
+    residual_value: float
+    cca_rate: float  # Capital Cost Allowance rate
+    asset_class: str
+    
+@dataclass
+class Match:
+    receipt: Receipt
+    transaction: Transaction
+    confidence_score: float
+    match_reason: str
+    tax_analysis: Optional[dict] = None