Раис Юсупалиев
65 lines
2.1 KiB
Python
65 lines
2.1 KiB
Python
"""CDEK response mapper to unified delivery schema."""
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from decimal import Decimal
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from typing import Any
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from app.schemas.response import DeliveryPrice
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class CDEKMappingError(ValueError):
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"""Raised when CDEK response cannot be mapped."""
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def map_cdek_response(payload: dict[str, Any]) -> list[DeliveryPrice]:
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tariffs = _get_tariffs(payload)
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payload_currency = payload.get("currency")
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return [
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_map_tariff(tariff, payload_currency=payload_currency)
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for tariff in tariffs
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]
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def _map_tariff(
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tariff: dict[str, Any],
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*,
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payload_currency: object,
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) -> DeliveryPrice:
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service_name = tariff.get("tariff_name") or tariff.get("tariff_code")
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if service_name is None:
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raise CDEKMappingError("CDEK tariff_name is missing.")
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raw_price = tariff.get("delivery_sum")
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if raw_price is None:
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raise CDEKMappingError("CDEK delivery_sum is missing.")
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period_min = tariff.get("period_min")
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if period_min is None:
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raise CDEKMappingError("CDEK period_min is missing.")
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period_max = tariff.get("period_max", period_min)
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raw_currency = tariff.get("currency") or payload_currency or "RUB"
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try:
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return DeliveryPrice(
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provider="cdek",
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service_name=str(service_name),
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price=Decimal(str(raw_price)),
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currency=str(raw_currency).upper(),
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delivery_days_min=int(period_min),
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delivery_days_max=int(period_max),
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)
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except (ArithmeticError, TypeError, ValueError) as exc:
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raise CDEKMappingError("CDEK response fields have invalid values.") from exc
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def _get_tariffs(payload: dict[str, Any]) -> list[dict[str, Any]]:
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tariff_codes = payload.get("tariff_codes")
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if not isinstance(tariff_codes, list) or not tariff_codes:
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raise CDEKMappingError("CDEK response must include non-empty tariff_codes.")
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tariffs: list[dict[str, Any]] = []
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for tariff in tariff_codes:
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if not isinstance(tariff, dict):
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raise CDEKMappingError("CDEK tariff entry must be an object.")
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tariffs.append(tariff)
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return tariffs
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