Раис Юсупалиев
67 lines
2.2 KiB
Python
67 lines
2.2 KiB
Python
"""Delivery API controller skeleton."""
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from fastapi import APIRouter, Depends, HTTPException, Request, status
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from app.adapters.delivery_providers.cdek import CDEKProvider
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from app.config import Settings
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from app.controllers.http_client import build_controller_http_client
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from app.repositories.cache.redis_cache import PriceCache
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from app.schemas.request import DeliveryRequest
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from app.schemas.response import DeliveryPrice
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from app.services.aggregator import AggregatorService, AggregatorServiceError
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router = APIRouter(prefix="/delivery", tags=["delivery"])
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_AGGREGATOR_SERVICE_STATE_KEY = "aggregator_service"
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def _build_aggregator_service(settings: Settings) -> AggregatorService:
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http_client = build_controller_http_client(
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timeout_seconds=settings.adapter.cdek_timeout_seconds
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)
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providers = (
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CDEKProvider.from_adapter_config(
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http_client=http_client,
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adapter_config=settings.adapter,
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),
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)
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cache = PriceCache.from_repository_config(settings.repository)
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service = AggregatorService(
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providers=providers,
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cache=cache,
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weight_round_scale=settings.business_logic.weight_round_scale,
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)
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return service
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async def get_aggregator_service(request: Request) -> AggregatorService:
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cached_service = getattr(request.app.state, _AGGREGATOR_SERVICE_STATE_KEY, None)
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if cached_service is not None:
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return cached_service
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settings = request.app.state.settings
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service = _build_aggregator_service(settings)
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setattr(request.app.state, _AGGREGATOR_SERVICE_STATE_KEY, service)
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return service
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@router.post(
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"/price",
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response_model=list[DeliveryPrice],
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)
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async def get_delivery_price(
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delivery_request: DeliveryRequest,
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service: AggregatorService = Depends(get_aggregator_service),
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) -> list[DeliveryPrice]:
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try:
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return await service.get_all_prices(delivery_request)
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except AggregatorServiceError as exc:
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raise HTTPException(
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status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
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detail={
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"code": "aggregator_service_error",
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"message": "Delivery price aggregation is temporarily unavailable.",
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},
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) from exc
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