Add custom exceptions handling

app/exceptions/__init__.py

@@ -0,0 +1,120 @@
+# app/exceptions/__init__.py
+"""
+Custom exception classes for the LetzShop API.
+
+This module provides frontend-friendly exceptions with consistent error codes,
+messages, and HTTP status mappings.
+"""
+
+from .base import (
+    LetzShopException,
+    ValidationException,
+    AuthenticationException,
+    AuthorizationException,
+    ResourceNotFoundException,
+    ConflictException,
+    BusinessLogicException,
+    ExternalServiceException,
+    RateLimitException,
+)
+
+from .auth import (
+    InvalidCredentialsException,
+    TokenExpiredException,
+    InsufficientPermissionsException,
+    UserNotActiveException,
+    AdminRequiredException,
+)
+
+from .product import (
+    ProductNotFoundException,
+    ProductAlreadyExistsException,
+    InvalidProductDataException,
+    ProductValidationException,
+)
+
+from .stock import (
+    StockNotFoundException,
+    InsufficientStockException,
+    InvalidStockOperationException,
+    StockValidationException,
+)
+
+from .shop import (
+    ShopNotFoundException,
+    ShopAlreadyExistsException,
+    ShopNotActiveException,
+    ShopNotVerifiedException,
+    UnauthorizedShopAccessException,
+    InvalidShopDataException,
+)
+
+from .marketplace import (
+    MarketplaceImportException,
+    ImportJobNotFoundException,
+    ImportJobNotOwnedException,
+    InvalidImportDataException,
+    ImportJobCannotBeCancelledException,
+    ImportJobCannotBeDeletedException,
+)
+
+from .admin import (
+    UserNotFoundException,
+    UserStatusChangeException,
+    ShopVerificationException,
+    AdminOperationException,
+)
+
+__all__ = [
+    # Base exceptions
+    "LetzShopException",
+    "ValidationException",
+    "AuthenticationException",
+    "AuthorizationException",
+    "ResourceNotFoundException",
+    "ConflictException",
+    "BusinessLogicException",
+    "ExternalServiceException",
+    "RateLimitException",
+
+    # Auth exceptions
+    "InvalidCredentialsException",
+    "TokenExpiredException",
+    "InsufficientPermissionsException",
+    "UserNotActiveException",
+    "AdminRequiredException",
+
+    # Product exceptions
+    "ProductNotFoundException",
+    "ProductAlreadyExistsException",
+    "InvalidProductDataException",
+    "ProductValidationException",
+
+    # Stock exceptions
+    "StockNotFoundException",
+    "InsufficientStockException",
+    "InvalidStockOperationException",
+    "StockValidationException",
+
+    # Shop exceptions
+    "ShopNotFoundException",
+    "ShopAlreadyExistsException",
+    "ShopNotActiveException",
+    "ShopNotVerifiedException",
+    "UnauthorizedShopAccessException",
+    "InvalidShopDataException",
+
+    # Marketplace exceptions
+    "MarketplaceImportException",
+    "ImportJobNotFoundException",
+    "ImportJobNotOwnedException",
+    "InvalidImportDataException",
+    "ImportJobCannotBeCancelledException",
+    "ImportJobCannotBeDeletedException",
+
+    # Admin exceptions
+    "UserNotFoundException",
+    "UserStatusChangeException",
+    "ShopVerificationException",
+    "AdminOperationException",
+]