Раис Юсупалиев
677 lines
24 KiB
Python
677 lines
24 KiB
Python
"""Aggregator service orchestrating providers, cache and domain rules."""
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import asyncio
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import hashlib
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import json
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from collections.abc import Iterable, Mapping, Sequence
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from contextlib import AbstractAsyncContextManager
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from decimal import Decimal
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from typing import Protocol
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import structlog
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from app.adapters.address_suggestions.base import (
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AddressSuggestionClientError,
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AddressSuggestionProvider,
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AddressSuggestionRequestError,
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)
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from app.adapters.delivery_providers.base import (
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DeliveryProvider,
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ProviderClientError,
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ProviderRequestError,
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)
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from app.adapters.delivery_providers.cdek.order_mapper import (
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CDEKOrderRegistrationResult,
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)
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from app.adapters.tbank.base import (
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TBankPaymentAdapterError,
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TBankPaymentNotificationTokenError,
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TBankPaymentRequestError,
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)
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from app.domain.payment_notifications import (
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TBankPaymentNotificationAction,
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resolve_tbank_payment_notification_action,
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)
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from app.domain.price import (
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DEFAULT_PROVIDER_PRICE_MULTIPLIER,
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DEFAULT_WEIGHT_ROUND_SCALE,
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NormalizedDeliveryRequest,
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calculate_expected_payment_amount_kopecks,
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filter_and_sort_prices,
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is_init_payment_price_valid,
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normalize_delivery_request,
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)
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from app.repositories.order import OrderData
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from app.schemas.payment import (
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InitPaymentRequest,
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InitPaymentResponse,
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TBankPaymentNotification,
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)
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from app.schemas.request import AddressSuggestRequest, DeliveryCalculationRequest
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from app.schemas.response import AddressSuggestion, DeliveryPrice
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logger = structlog.get_logger(__name__)
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class AggregatorServiceError(RuntimeError):
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"""Base exception for AggregatorService failures."""
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class InvalidDeliveryRequestError(AggregatorServiceError):
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"""Raised when provider rejects delivery request as invalid."""
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class UnsupportedAddressSuggestionCountryError(AggregatorServiceError):
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"""Raised when address suggestions are not configured for a country."""
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class InvalidAddressSuggestRequestError(AggregatorServiceError):
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"""Raised when provider rejects address suggestion payload."""
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class AddressSuggestionsUnavailableError(AggregatorServiceError):
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"""Raised when address suggestions cannot be completed."""
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class InvalidInitPaymentRequestError(AggregatorServiceError):
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"""Raised when provider rejects payment init payload as invalid."""
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class InitPaymentUnavailableError(AggregatorServiceError):
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"""Raised when payment initialization cannot be completed."""
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class InvalidTBankPaymentNotificationError(AggregatorServiceError):
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"""Raised when a TBank payment notification is invalid."""
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class TBankPaymentNotificationProcessingError(AggregatorServiceError):
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"""Raised when a TBank payment notification cannot be processed."""
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class PriceCacheProtocol(Protocol):
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async def get(self, key: str) -> object | None: ...
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async def set(self, key: str, value: object, ttl: int | None = None) -> None: ...
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class PaymentAdapterProtocol(Protocol):
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async def create_payment_link(self, order_uuid: str, amount_kopecks: int) -> str: ...
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def verify_payment_notification(
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self,
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notification: TBankPaymentNotification,
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) -> None: ...
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class PaymentPriceValidationAdapterProtocol(Protocol):
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async def get_payment_price(
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self,
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request: InitPaymentRequest,
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) -> DeliveryPrice | None: ...
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class OrderRegistrationAdapterProtocol(Protocol):
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async def register_order(
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self, request: InitPaymentRequest
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) -> CDEKOrderRegistrationResult: ...
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class OrderRepositoryProtocol(Protocol):
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def session(self) -> AbstractAsyncContextManager[object]: ...
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async def create_order(self, session: object, order_data: OrderData) -> object: ...
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async def get_order_by_order_uuid(
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self,
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session: object,
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order_uuid: str,
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) -> object | None: ...
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async def mark_payment_status(
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self,
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session: object,
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order_uuid: str,
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status: str,
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payment_id: int,
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) -> object | None: ...
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async def mark_cdek_order_registered(
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self,
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session: object,
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order_uuid: str,
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cdek_order_uuid: str,
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) -> object | None: ...
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class FilterAndSortPricesFn(Protocol):
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def __call__(
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self,
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prices: Iterable[object],
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*,
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price_multiplier: Decimal = DEFAULT_PROVIDER_PRICE_MULTIPLIER,
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parcel_type: object | None = None,
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) -> list[object]: ...
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class AggregatorService:
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def __init__(
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self,
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providers: Sequence[DeliveryProvider],
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cache: PriceCacheProtocol | None = None,
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payment_adapter: PaymentAdapterProtocol | None = None,
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payment_price_validation_adapter: (
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PaymentPriceValidationAdapterProtocol | None
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) = None,
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order_repository: OrderRepositoryProtocol | None = None,
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order_registration_adapter: OrderRegistrationAdapterProtocol | None = None,
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address_suggestion_providers: Sequence[AddressSuggestionProvider] = (),
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address_suggestion_country_to_provider: Mapping[str, str] | None = None,
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*,
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weight_round_scale: int = DEFAULT_WEIGHT_ROUND_SCALE,
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provider_price_multiplier: Decimal = DEFAULT_PROVIDER_PRICE_MULTIPLIER,
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filter_and_sort_prices_fn: FilterAndSortPricesFn = filter_and_sort_prices,
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) -> None:
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self._providers = tuple(providers)
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self._cache = cache
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self._payment_adapter = payment_adapter
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self._payment_price_validation_adapter = payment_price_validation_adapter
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self._order_repository = order_repository
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self._order_registration_adapter = order_registration_adapter
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self._weight_round_scale = weight_round_scale
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self._provider_price_multiplier = provider_price_multiplier
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self._filter_and_sort_prices = filter_and_sort_prices_fn
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self._address_suggestion_providers: dict[str, AddressSuggestionProvider] = {
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provider.name: provider for provider in address_suggestion_providers
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}
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self._address_suggestion_country_to_provider = (
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address_suggestion_country_to_provider or {}
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)
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async def get_all_prices(
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self, request: DeliveryCalculationRequest
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) -> list[DeliveryPrice]:
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normalized_request = normalize_delivery_request(
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request, weight_round_scale=self._weight_round_scale
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)
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provider_request = self._to_provider_request(normalized_request)
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provider_results = await asyncio.gather(
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*(
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self._get_provider_prices(
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provider=provider,
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request=provider_request,
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cache_key=self._build_cache_key(
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provider_name=provider.name,
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request=normalized_request,
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),
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)
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for provider in self._providers
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),
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return_exceptions=True,
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)
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successful_results = [
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price
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for provider_prices in provider_results
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if isinstance(provider_prices, list)
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for price in provider_prices
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]
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provider_errors = [
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error
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for error in provider_results
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if isinstance(error, Exception)
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]
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if (
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not successful_results
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and provider_errors
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and any(isinstance(error, ProviderRequestError) for error in provider_errors)
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):
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raise InvalidDeliveryRequestError(
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"Delivery request is invalid for configured providers."
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)
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filtered_and_sorted = self._filter_and_sort_prices(
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successful_results,
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price_multiplier=self._provider_price_multiplier,
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parcel_type=request.parcel_type,
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)
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return [self._coerce_delivery_price(price) for price in filtered_and_sorted]
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async def suggest_addresses(
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self, request: AddressSuggestRequest
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) -> list[AddressSuggestion]:
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provider = self._resolve_address_suggestion_provider(request.country_code)
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try:
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suggestions = await provider.suggest(request)
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except AddressSuggestionRequestError as exc:
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raise InvalidAddressSuggestRequestError(
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"Address suggestion request is invalid for the configured provider."
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) from exc
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except AddressSuggestionClientError as exc:
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raise AddressSuggestionsUnavailableError(
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"Address suggestions are temporarily unavailable."
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) from exc
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return [self._coerce_address_suggestion(item) for item in suggestions]
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async def init_payment(self, request: InitPaymentRequest) -> InitPaymentResponse:
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if self._payment_adapter is None:
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raise InitPaymentUnavailableError("Payment adapter is not configured.")
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await self._validate_init_payment_price(request)
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try:
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payment_url = await self._payment_adapter.create_payment_link(
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order_uuid=request.order_uuid,
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amount_kopecks=request.system_data.tariff.price,
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)
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except TBankPaymentRequestError as exc:
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logger.exception(
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"payment_init_rejected",
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order_uuid=request.order_uuid,
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provider_status_code=exc.status_code,
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provider_error_code=exc.error_code,
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provider_error_message=exc.provider_message,
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provider_error_details=exc.details,
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)
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raise InvalidInitPaymentRequestError(
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"Payment init request is invalid for the configured provider."
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) from exc
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except TBankPaymentAdapterError as exc:
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raise InitPaymentUnavailableError(
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"Payment initialization is temporarily unavailable."
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) from exc
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except Exception as exc:
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raise InitPaymentUnavailableError(
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"Payment initialization is temporarily unavailable."
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) from exc
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await self._persist_order(request=request, payment_url=payment_url)
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return InitPaymentResponse(payment_url=payment_url)
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async def _validate_init_payment_price(
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self,
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request: InitPaymentRequest,
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) -> None:
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if self._payment_price_validation_adapter is None:
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raise InitPaymentUnavailableError(
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"Payment price validation adapter is not configured."
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)
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tariff_code = request.system_data.tariff.tariff_code
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requested_price = request.system_data.tariff.price
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try:
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provider_price = await self._payment_price_validation_adapter.get_payment_price(
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request
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)
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except ProviderRequestError as exc:
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logger.warning(
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"init_payment_price_validation_request_rejected",
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order_uuid=request.order_uuid,
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tariff_code=tariff_code,
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requested_price_kopecks=requested_price,
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error=str(exc),
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)
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raise InvalidInitPaymentRequestError(
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"Payment init request is invalid for CDEK price validation."
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) from exc
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except ProviderClientError as exc:
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logger.warning(
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"init_payment_price_validation_unavailable",
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order_uuid=request.order_uuid,
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tariff_code=tariff_code,
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requested_price_kopecks=requested_price,
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error=str(exc),
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)
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raise InitPaymentUnavailableError(
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"Payment price validation is temporarily unavailable."
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) from exc
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except Exception as exc:
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logger.exception(
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"init_payment_price_validation_unexpected_error",
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order_uuid=request.order_uuid,
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tariff_code=tariff_code,
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requested_price_kopecks=requested_price,
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)
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raise InitPaymentUnavailableError(
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"Payment price validation is temporarily unavailable."
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) from exc
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if provider_price is None:
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logger.warning(
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"init_payment_price_validation_tariff_not_found",
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order_uuid=request.order_uuid,
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tariff_code=tariff_code,
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requested_price_kopecks=requested_price,
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)
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raise InvalidInitPaymentRequestError(
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"CDEK did not return the requested tariff for payment validation."
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)
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expected_amount_kopecks = calculate_expected_payment_amount_kopecks(
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provider_price,
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price_multiplier=self._provider_price_multiplier,
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)
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if not is_init_payment_price_valid(
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requested_price,
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provider_price,
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price_multiplier=self._provider_price_multiplier,
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):
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logger.warning(
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"init_payment_price_mismatch",
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order_uuid=request.order_uuid,
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tariff_code=tariff_code,
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requested_price_kopecks=requested_price,
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expected_price_kopecks=expected_amount_kopecks,
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provider_currency=getattr(provider_price, "currency", None),
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provider_price=str(getattr(provider_price, "price", None)),
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)
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raise InvalidInitPaymentRequestError(
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"Payment amount does not match CDEK validated delivery price."
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)
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async def handle_tbank_payment_notification(
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self,
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notification: TBankPaymentNotification,
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) -> str:
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if self._payment_adapter is None:
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raise TBankPaymentNotificationProcessingError(
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"Payment adapter is not configured."
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)
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try:
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self._payment_adapter.verify_payment_notification(notification)
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except TBankPaymentNotificationTokenError as exc:
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raise InvalidTBankPaymentNotificationError(
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"TBank payment notification token is invalid."
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) from exc
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except TBankPaymentAdapterError as exc:
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raise TBankPaymentNotificationProcessingError(
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"TBank payment notification verification failed."
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) from exc
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action = resolve_tbank_payment_notification_action(
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status=notification.Status,
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success=notification.Success,
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error_code=notification.ErrorCode,
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)
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order = await self._load_order_and_mark_payment_status(notification)
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if action is TBankPaymentNotificationAction.ACKNOWLEDGE_ONLY:
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return "OK"
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existing_cdek_order_uuid = getattr(order, "cdek_order_uuid", None)
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if existing_cdek_order_uuid:
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return "OK"
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registration_result = await self._register_cdek_order(order)
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await self._save_cdek_order_uuid(
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order_uuid=notification.OrderId,
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cdek_order_uuid=registration_result.order_uuid,
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)
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return "OK"
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async def _load_order_and_mark_payment_status(
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self,
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notification: TBankPaymentNotification,
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) -> object:
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if self._order_repository is None:
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raise TBankPaymentNotificationProcessingError(
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"Order repository is not configured."
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)
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try:
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async with self._order_repository.session() as session:
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order = await self._order_repository.get_order_by_order_uuid(
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session,
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notification.OrderId,
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)
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if order is None:
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logger.warning(
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"tbank_payment_notification_order_not_found",
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order_uuid=notification.OrderId,
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)
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raise TBankPaymentNotificationProcessingError(
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"Order was not found for TBank payment notification."
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)
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updated_order = await self._order_repository.mark_payment_status(
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session,
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notification.OrderId,
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notification.Status,
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notification.PaymentId,
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)
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if updated_order is None:
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logger.warning(
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"tbank_payment_notification_order_not_found",
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order_uuid=notification.OrderId,
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)
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raise TBankPaymentNotificationProcessingError(
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"Order was not found for TBank payment notification."
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)
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return order
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except TBankPaymentNotificationProcessingError:
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raise
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except Exception as exc:
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logger.exception(
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"tbank_payment_notification_order_update_failed",
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order_uuid=notification.OrderId,
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payment_status=notification.Status,
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tbank_payment_id=notification.PaymentId,
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)
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raise TBankPaymentNotificationProcessingError(
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"TBank payment notification order update failed."
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) from exc
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async def _register_cdek_order(
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self, order: object
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) -> CDEKOrderRegistrationResult:
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if self._order_registration_adapter is None:
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raise TBankPaymentNotificationProcessingError(
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"CDEK order registration adapter is not configured."
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)
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try:
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request = self._to_init_payment_request_from_order(order)
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return await self._order_registration_adapter.register_order(request)
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except Exception as exc:
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logger.exception(
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"cdek_order_registration_failed",
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order_uuid=getattr(order, "order_uuid", None),
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)
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raise TBankPaymentNotificationProcessingError(
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"CDEK order registration failed."
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) from exc
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async def _save_cdek_order_uuid(
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self,
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*,
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order_uuid: str,
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cdek_order_uuid: str,
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) -> None:
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if self._order_repository is None:
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raise TBankPaymentNotificationProcessingError(
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"Order repository is not configured."
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)
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try:
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async with self._order_repository.session() as session:
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order = await self._order_repository.mark_cdek_order_registered(
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session,
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order_uuid,
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cdek_order_uuid,
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)
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if order is None:
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logger.warning(
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"cdek_order_uuid_order_not_found",
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order_uuid=order_uuid,
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cdek_order_uuid=cdek_order_uuid,
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)
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raise TBankPaymentNotificationProcessingError(
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"Order was not found while saving CDEK order UUID."
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)
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except TBankPaymentNotificationProcessingError:
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raise
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except Exception as exc:
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logger.exception(
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"cdek_order_uuid_persistence_failed",
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order_uuid=order_uuid,
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cdek_order_uuid=cdek_order_uuid,
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)
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raise TBankPaymentNotificationProcessingError(
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"CDEK order UUID persistence failed."
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) from exc
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async def _persist_order(
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self,
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*,
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request: InitPaymentRequest,
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payment_url: str,
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) -> None:
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if self._order_repository is None:
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return
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try:
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async with self._order_repository.session() as session:
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await self._order_repository.create_order(
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session,
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self._to_order_data(request=request, payment_url=payment_url),
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)
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except Exception:
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logger.exception(
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"order_persistence_failed",
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order_uuid=request.order_uuid,
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)
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|
@staticmethod
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def _to_order_data(
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*,
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request: InitPaymentRequest,
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payment_url: str,
|
|
) -> OrderData:
|
|
return OrderData(
|
|
order_uuid=request.order_uuid,
|
|
payment_url=payment_url,
|
|
price=request.system_data.tariff.price,
|
|
tariff_code=request.system_data.tariff.tariff_code,
|
|
account_email=request.account_email,
|
|
payload=request.model_dump(mode="json", by_alias=True),
|
|
)
|
|
|
|
@staticmethod
|
|
def _to_init_payment_request_from_order(order: object) -> InitPaymentRequest:
|
|
payload = getattr(order, "payload")
|
|
return InitPaymentRequest.model_validate(payload)
|
|
|
|
async def _get_provider_prices(
|
|
self,
|
|
*,
|
|
provider: DeliveryProvider,
|
|
request: DeliveryCalculationRequest,
|
|
cache_key: str,
|
|
) -> list[DeliveryPrice]:
|
|
cached_prices = await self._get_cached_prices(cache_key)
|
|
if cached_prices is not None:
|
|
return cached_prices
|
|
|
|
fresh_prices = await provider.get_prices(request)
|
|
await self._set_cached_prices(
|
|
cache_key,
|
|
fresh_prices,
|
|
ttl=getattr(provider, "cache_ttl_seconds", None),
|
|
)
|
|
return fresh_prices
|
|
|
|
async def _get_cached_prices(self, cache_key: str) -> list[DeliveryPrice] | None:
|
|
if self._cache is None:
|
|
return None
|
|
try:
|
|
payload = await self._cache.get(cache_key)
|
|
except Exception:
|
|
return None
|
|
if payload is None:
|
|
return None
|
|
try:
|
|
return self._coerce_delivery_prices(payload)
|
|
except Exception:
|
|
return None
|
|
|
|
async def _set_cached_prices(
|
|
self,
|
|
cache_key: str,
|
|
payload: list[DeliveryPrice],
|
|
*,
|
|
ttl: int | None,
|
|
) -> None:
|
|
if self._cache is None:
|
|
return
|
|
try:
|
|
await self._cache.set(cache_key, payload, ttl=ttl)
|
|
except Exception:
|
|
return
|
|
|
|
@staticmethod
|
|
def _to_provider_request(
|
|
request: NormalizedDeliveryRequest,
|
|
) -> DeliveryCalculationRequest:
|
|
return DeliveryCalculationRequest(
|
|
entity=request.entity,
|
|
from_city=request.from_city,
|
|
to_city=request.to_city,
|
|
weight_kg=request.weight_kg,
|
|
length_cm=request.length_cm,
|
|
width_cm=request.width_cm,
|
|
height_cm=request.height_cm,
|
|
)
|
|
|
|
@staticmethod
|
|
def _build_cache_key(provider_name: str, request: NormalizedDeliveryRequest) -> str:
|
|
cache_payload = {
|
|
"provider": provider_name,
|
|
"entity": request.entity,
|
|
"from_city": request.from_city,
|
|
"to_city": request.to_city,
|
|
"weight_kg": str(request.weight_kg),
|
|
"length_cm": str(request.length_cm),
|
|
"width_cm": str(request.width_cm),
|
|
"height_cm": str(request.height_cm),
|
|
}
|
|
serialized_payload = json.dumps(
|
|
cache_payload,
|
|
ensure_ascii=True,
|
|
sort_keys=True,
|
|
separators=(",", ":"),
|
|
)
|
|
cache_hash = hashlib.sha256(serialized_payload.encode("utf-8")).hexdigest()
|
|
return f"delivery-price:{provider_name}:{cache_hash}"
|
|
|
|
@staticmethod
|
|
def _coerce_delivery_price(value: object) -> DeliveryPrice:
|
|
return DeliveryPrice.model_validate(value, from_attributes=True)
|
|
|
|
@classmethod
|
|
def _coerce_delivery_prices(cls, value: object) -> list[DeliveryPrice]:
|
|
if not isinstance(value, list):
|
|
raise TypeError("Cached delivery prices must be a list.")
|
|
return [cls._coerce_delivery_price(item) for item in value]
|
|
|
|
@staticmethod
|
|
def _coerce_address_suggestion(value: object) -> AddressSuggestion:
|
|
return AddressSuggestion.model_validate(value, from_attributes=True)
|
|
|
|
def _resolve_address_suggestion_provider(
|
|
self, country_code: str
|
|
) -> AddressSuggestionProvider:
|
|
provider_id = self._address_suggestion_country_to_provider.get(country_code)
|
|
if provider_id is None:
|
|
raise UnsupportedAddressSuggestionCountryError(
|
|
"Address suggestions are not configured for the requested country."
|
|
)
|
|
|
|
provider = self._address_suggestion_providers.get(provider_id)
|
|
if provider is None:
|
|
raise UnsupportedAddressSuggestionCountryError(
|
|
"Address suggestions are not configured for the requested country."
|
|
)
|
|
return provider
|