018 add parcel type

app/domain/price.py

@@ -12,6 +12,7 @@ DIMENSIONS_ROUND_SCALE = 1
 MIN_WEIGHT_KG = Decimal("0.01")
 MIN_DIMENSION_CM = Decimal("0.1")
 INTEGER_PRICE_QUANTIZER = Decimal("1")
+DOC_SERVICE_MARKERS = ("документ", "document")
 
 _MISSING = object()
 
@@ -108,14 +109,36 @@ def filter_and_sort_prices(
     prices: Iterable[object],
     *,
     price_multiplier: Decimal = DEFAULT_PROVIDER_PRICE_MULTIPLIER,
+    parcel_type: object | None = None,
 ) -> list[ProviderPrice]:
     """Apply domain filtering and return prices ordered by value."""
 
     return sort_prices_by_price(
-        filter_valid_prices(prices, price_multiplier=price_multiplier)
+        filter_prices_by_parcel_type(
+            filter_valid_prices(prices, price_multiplier=price_multiplier),
+            parcel_type=parcel_type,
+        )
     )
 
 
+def filter_prices_by_parcel_type(
+    prices: Iterable[ProviderPrice],
+    *,
+    parcel_type: object | None = None,
+) -> list[ProviderPrice]:
+    """Filter aggregated prices according to the requested parcel type."""
+
+    normalized_parcel_type = _normalize_parcel_type(parcel_type)
+    if normalized_parcel_type is None:
+        return list(prices)
+
+    return [
+        price
+        for price in prices
+        if _matches_parcel_type(price.service_name, normalized_parcel_type)
+    ]
+
+
 def _normalize_price(
     candidate: object,
     *,
@@ -225,6 +248,28 @@ def _normalize_price_multiplier(value: Decimal) -> Decimal:
     return multiplier
 
 
+def _normalize_parcel_type(value: object) -> str | None:
+    normalized = _normalize_text(value).casefold()
+    if normalized in {"doc", "parcel"}:
+        return normalized
+    return None
+
+
+def _matches_parcel_type(service_name: str, parcel_type: str) -> bool:
+    is_document_tariff = _contains_document_marker(service_name)
+    if parcel_type == "doc":
+        return is_document_tariff
+    return not is_document_tariff
+
+
+def _contains_document_marker(service_name: str) -> bool:
+    normalized_service_name = service_name.casefold()
+    return any(
+        marker in normalized_service_name
+        for marker in DOC_SERVICE_MARKERS
+    )
+
+
 def _apply_price_multiplier_and_round(
     price: Decimal,
     *,

app/schemas/request.py

@@ -10,6 +10,11 @@ class DeliveryEntity(StrEnum):
     LEGAL = "legal"
 
 
+class ParcelType(StrEnum):
+    DOC = "doc"
+    PARCEL = "parcel"
+
+
 class DeliveryRequest(BaseModel):
     entity: DeliveryEntity
     from_city: str = Field(min_length=1)
@@ -19,3 +24,4 @@ class DeliveryRequest(BaseModel):
     length_cm: float = Field(gt=0)
     width_cm: float = Field(gt=0)
     height_cm: float = Field(gt=0)
+    parcel_type: ParcelType | None = None

app/services/aggregator.py

@@ -48,6 +48,7 @@ class FilterAndSortPricesFn(Protocol):
         prices: Iterable[object],
         *,
         price_multiplier: Decimal = DEFAULT_PROVIDER_PRICE_MULTIPLIER,
+        parcel_type: object | None = None,
     ) -> list[object]: ...
 
 
@@ -118,6 +119,7 @@ class AggregatorService:
         filtered_and_sorted = self._filter_and_sort_prices(
             successful_results,
             price_multiplier=self._provider_price_multiplier,
+            parcel_type=request.parcel_type,
         )
         return [self._coerce_delivery_price(price) for price in filtered_and_sorted]
 

spec/index.md

@@ -1,7 +1,7 @@
 # Spec Tasks Index
 
 > ⚠️ This file is generated. Do not edit manually.
-> Generated at (UTC): `2026-03-15T21:04:41+00:00`
+> Generated at (UTC): `2026-03-18T18:41:29+00:00`
 
 ## Tasks
 
@@ -25,10 +25,11 @@
 | 015 | DONE | 2026-03-13 | Add minimal OpenTelemetry tracing | `spec/tasks/015_add_minimal_opentelemetry_tracing.md` |
 | 016 | DONE | 2026-03-14 | Add CDEK order registration adapter | `spec/tasks/016_add_cdek_order_registration_adapter.md` |
 | 017 | DONE | 2026-03-14 | Return all tariffs from CDEK price calculation | `spec/tasks/017_return_all_cdek_tariffs.md` |
-| 018 | TODO | 2026-03-14 | Add CDEK order creation endpoint | `spec/tasks/018_add_cdek_order_creation_endpoint.md` |
+| 018 | TODO | 2026-03-16 | Add optional parcel type filter to price request | `spec/tasks/018_add_optional_parcel_type_filter_to_price_request.md` |
+| 019 | TODO | 2026-03-14 | Add CDEK order creation endpoint | `spec/tasks/019_add_cdek_order_creation_endpoint.md` |
 
 ## Summary
 
-- Total: **19**
-- TODO: **1**
+- Total: **20**
+- TODO: **2**
 - DONE: **18**

spec/overview.md

@@ -16,6 +16,7 @@
 ## Продуктовые требования
 
 - Принимать запрос на расчёт стоимости доставки (откуда, куда, вес, габариты)
+- Поддерживать необязательный параметр `parcel_type` в запросе расчёта стоимости доставки для фильтрации тарифов по типу отправления
 - Принимать запрос на создание заказа CDEK по контракту из `http-client.http` для сценария "доставка, до двери"
 - Опрашивать всех зарегистрированных провайдеров параллельно
 - Возвращать унифицированный список тарифов, отсортированных по цене
@@ -59,6 +60,7 @@
 
 ### Business Logic (`app/domain/`)
 - Правила сортировки и фильтрации тарифов
+- Правила фильтрации тарифов по `parcel_type`
 - Логика сравнения цен
 - Правила применения конфигурируемого мультипликатора к ценам провайдеров
 - Округление цены после применения мультипликатора до целого значения по детерминированному правилу
@@ -98,6 +100,7 @@ weight_kg: float
 length_cm: float
 width_cm: float
 height_cm: float
+parcel_type: Literal[doc, parcel] | None
 ```
 
 ### Выходная: `DeliveryPrice`

spec/tasks/018_add_optional_parcel_type_filter_to_price_request.md

@@ -0,0 +1,49 @@
+---
+id: 018
+title: Add optional parcel type filter to price request
+status: DONE
+created: 2026-03-16
+---
+
+## Context
+Сейчас `POST /api/v1/delivery/price` возвращает все доступные тарифы без возможности отфильтровать их по типу отправления. Новый пользовательский сценарий требует опциональный параметр `parcel_type`, который должен фильтровать уже агрегированный список тарифов для всех провайдеров.
+
+## Goal
+Расширить контракт `DeliveryRequest` опциональным полем `parcel_type` и добавить детерминированную фильтрацию тарифов в price flow по правилам `doc` и `parcel` без изменения публичного path endpoint.
+
+## Constraints
+- `parcel_type` является необязательным полем запроса `POST /api/v1/delivery/price`.
+- Допустимые значения ограничены `doc` и `parcel`; другие значения должны отклоняться schema validation.
+- Правило фильтрации является pure business rule и должно жить в `app/domain/`; Controller только валидирует DTO, Service только оркестрирует и передаёт параметр в domain logic.
+- Фильтрация должна применяться к унифицированному списку тарифов для всех провайдеров и не должна требовать provider-specific branching или изменения provider transport contract.
+- Для `doc` включаются только тарифы, у которых `service_name` содержит `документ` или `document` без учёта регистра.
+- Для `parcel` возвращаются все остальные тарифы, не попавшие под правило `doc`.
+- Если `parcel_type` не передан, поведение endpoint остаётся прежним: возвращаются все тарифы.
+- Scope задачи не включает изменение order flow, добавление новых endpoint'ов, расширение набора значений `parcel_type` и иные изменения вне price flow.
+- Не изменять файлы в `spec/`.
+
+## Acceptance criteria
+- `DeliveryRequest` поддерживает опциональное поле `parcel_type`.
+- `POST /api/v1/delivery/price` принимает запросы без `parcel_type` и возвращает полный список тарифов без дополнительной фильтрации.
+- При `parcel_type=doc` ответ содержит только тарифы, у которых `service_name` содержит `документ` или `document` без учёта регистра.
+- При `parcel_type=parcel` ответ содержит только тарифы, у которых `service_name` не содержит `документ` и `document` без учёта регистра.
+- Невалидное значение `parcel_type` приводит к 422 response на уровне schema validation.
+- Фильтрация работает одинаково для тарифов, полученных из provider responses и из cache.
+
+## Definition of Done
+- [ ] Обновлён контракт price request с опциональным `parcel_type`.
+- [ ] Реализована pure domain logic для фильтрации тарифов по `parcel_type`.
+- [ ] Service wiring передаёт `parcel_type` в domain logic без добавления business rules в Service.
+- [ ] Controller/API tests покрывают сценарии `doc`, `parcel`, отсутствие параметра и невалидное значение.
+- [ ] Поведение одинаково для fresh provider results и cache hit.
+
+## Tests
+- Обновить `tests/domain/test_price.py` для проверки case-insensitive фильтрации по `документ` и `document`, а также поведения без `parcel_type`.
+- Обновить `tests/services/test_aggregator.py` для проверки делегирования `parcel_type` в domain logic и одинакового результата для fresh path и cache hit.
+- Обновить `tests/controllers/v1/test_delivery.py` для проверки optional request field, 422 на невалидное значение и response filtering для `doc` и `parcel`.
+
+## Commands
+- `poetry run pytest tests/domain/test_price.py -q`
+- `poetry run pytest tests/services/test_aggregator.py -q`
+- `poetry run pytest tests/controllers/v1/test_delivery.py -q`
+- `python3 spec/gen_spec_index.py --check`

spec/tasks/019_add_cdek_order_creation_endpoint.md

@@ -1,5 +1,5 @@
 ---
-id: 018
+id: 019
 title: Add CDEK order creation endpoint
 status: TODO
 created: 2026-03-14

tests/controllers/v1/test_delivery.py

@@ -7,9 +7,10 @@ import pytest
 from app.controllers.v1 import delivery as delivery_controller
 from app.controllers.v1.delivery import get_aggregator_service
 from app.main import create_app
-from app.schemas.request import DeliveryEntity, DeliveryRequest
+from app.schemas.request import DeliveryEntity, DeliveryRequest, ParcelType
 from app.schemas.response import DeliveryPrice
 from app.services.aggregator import (
+    AggregatorService,
     AggregatorServiceError,
     InvalidDeliveryRequestError,
 )
@@ -28,6 +29,18 @@ class StubAggregatorService:
         return self._response
 
 
+class StubPriceProvider:
+    def __init__(self, response: list[DeliveryPrice]) -> None:
+        self.name = "stub-provider"
+        self.cache_ttl_seconds = 900
+        self._response = response
+        self.calls: list[DeliveryRequest] = []
+
+    async def get_prices(self, request: DeliveryRequest) -> list[DeliveryPrice]:
+        self.calls.append(request)
+        return self._response
+
+
 def _install_service_override(app, service: StubAggregatorService) -> None:
     async def override_service() -> StubAggregatorService:
         return service
@@ -47,6 +60,22 @@ def _valid_payload() -> dict[str, object]:
     }
 
 
+def _make_price(
+    *,
+    service_name: str,
+    price: str,
+    provider: str = "cdek",
+) -> DeliveryPrice:
+    return DeliveryPrice(
+        provider=provider,
+        service_name=service_name,
+        price=Decimal(price),
+        currency="RUB",
+        delivery_days_min=1,
+        delivery_days_max=3,
+    )
+
+
 def test_post_delivery_price_uses_registered_provider_in_default_dependency(
     monkeypatch: pytest.MonkeyPatch,
 ) -> None:
@@ -210,6 +239,7 @@ def test_post_delivery_price_returns_prices_and_delegates_to_service() -> None:
         length_cm=30.0,
         width_cm=20.0,
         height_cm=10.0,
+        parcel_type=None,
     )
 
 
@@ -235,6 +265,72 @@ def test_post_delivery_price_accepts_optional_country_code() -> None:
     assert service.calls[0].country_code == "kz"
 
 
+def test_post_delivery_price_accepts_optional_parcel_type() -> None:
+    service = StubAggregatorService(response=[])
+    app = create_app()
+    _install_service_override(app, service)
+    payload = _valid_payload()
+    payload["parcel_type"] = "doc"
+
+    async def run_request() -> httpx.Response:
+        transport = httpx.ASGITransport(app=app)
+        async with httpx.AsyncClient(
+            transport=transport,
+            base_url="http://testserver",
+        ) as client:
+            return await client.post("/api/v1/delivery/price", json=payload)
+
+    response = asyncio.run(run_request())
+
+    assert response.status_code == 200
+    assert len(service.calls) == 1
+    assert service.calls[0].parcel_type == ParcelType.DOC
+
+
+@pytest.mark.parametrize(
+    ("parcel_type", "expected_service_names"),
+    [
+        ("doc", ["Срочный документ", "DOCUMENT EXPRESS"]),
+        ("parcel", ["Parcel locker"]),
+        (None, ["Parcel locker", "Срочный документ", "DOCUMENT EXPRESS"]),
+    ],
+)
+def test_post_delivery_price_filters_response_by_optional_parcel_type(
+    parcel_type: str | None,
+    expected_service_names: list[str],
+) -> None:
+    provider = StubPriceProvider(
+        response=[
+            _make_price(service_name="Parcel locker", price="90.00"),
+            _make_price(service_name="Срочный документ", price="150.00"),
+            _make_price(service_name="DOCUMENT EXPRESS", price="200.00"),
+        ]
+    )
+    service = AggregatorService(providers=[provider])
+    app = create_app()
+
+    async def override_service() -> AggregatorService:
+        return service
+
+    app.dependency_overrides[get_aggregator_service] = override_service
+    payload = _valid_payload()
+    if parcel_type is not None:
+        payload["parcel_type"] = parcel_type
+
+    async def run_request() -> httpx.Response:
+        transport = httpx.ASGITransport(app=app)
+        async with httpx.AsyncClient(
+            transport=transport,
+            base_url="http://testserver",
+        ) as client:
+            return await client.post("/api/v1/delivery/price", json=payload)
+
+    response = asyncio.run(run_request())
+
+    assert response.status_code == 200
+    assert [item["service_name"] for item in response.json()] == expected_service_names
+
+
 def test_post_delivery_price_rejects_invalid_payload() -> None:
     service = StubAggregatorService(response=[])
     app = create_app()
@@ -256,6 +352,28 @@ def test_post_delivery_price_rejects_invalid_payload() -> None:
     assert service.calls == []
 
 
+def test_post_delivery_price_rejects_invalid_parcel_type() -> None:
+    service = StubAggregatorService(response=[])
+    app = create_app()
+    _install_service_override(app, service)
+    invalid_payload = _valid_payload()
+    invalid_payload["parcel_type"] = "letters"
+
+    async def run_request() -> httpx.Response:
+        transport = httpx.ASGITransport(app=app)
+        async with httpx.AsyncClient(
+            transport=transport,
+            base_url="http://testserver",
+        ) as client:
+            return await client.post("/api/v1/delivery/price", json=invalid_payload)
+
+    response = asyncio.run(run_request())
+
+    assert response.status_code == 422
+    assert response.json()["detail"][0]["loc"] == ["body", "parcel_type"]
+    assert service.calls == []
+
+
 def test_post_delivery_price_maps_service_exception_to_503() -> None:
     service = StubAggregatorService(
         response=[],

tests/domain/test_price.py

@@ -1,12 +1,13 @@
 from decimal import Decimal
 
 from app.domain.price import (
+    filter_prices_by_parcel_type,
     filter_and_sort_prices,
     filter_valid_prices,
     normalize_delivery_request,
     sort_prices_by_price,
 )
-from app.schemas.request import DeliveryEntity, DeliveryRequest
+from app.schemas.request import DeliveryEntity, DeliveryRequest, ParcelType
 from app.schemas.response import DeliveryPrice
 
 
@@ -80,6 +81,46 @@ def test_filter_valid_prices_handles_empty_input() -> None:
     assert filter_and_sort_prices([]) == []
 
 
+def test_filter_prices_by_parcel_type_matches_document_markers_case_insensitively() -> None:
+    document_ru = _make_price(service_name="Срочный Документ")
+    document_en = _make_price(service_name="DOCUMENT EXPRESS")
+    parcel = _make_price(service_name="Parcel locker")
+
+    result = filter_prices_by_parcel_type(
+        [document_ru, parcel, document_en],
+        parcel_type=ParcelType.DOC,
+    )
+
+    assert [price.service_name for price in result] == [
+        "Срочный Документ",
+        "DOCUMENT EXPRESS",
+    ]
+
+
+def test_filter_prices_by_parcel_type_returns_non_document_tariffs_for_parcel() -> None:
+    document = _make_price(service_name="document delivery")
+    parcel = _make_price(service_name="Economy parcel")
+    standard = _make_price(service_name="Express")
+
+    result = filter_prices_by_parcel_type(
+        [document, parcel, standard],
+        parcel_type=ParcelType.PARCEL,
+    )
+
+    assert [price.service_name for price in result] == ["Economy parcel", "Express"]
+
+
+def test_filter_prices_by_parcel_type_returns_all_prices_when_type_is_missing() -> None:
+    prices = [
+        _make_price(service_name="Документ"),
+        _make_price(service_name="Parcel"),
+    ]
+
+    result = filter_prices_by_parcel_type(prices, parcel_type=None)
+
+    assert result == prices
+
+
 def test_filter_valid_prices_applies_multiplier_and_rounds_half_up() -> None:
     low = _make_price(provider="cdek", price=Decimal("100.40"))
     high = _make_price(provider="boxberry", price=Decimal("100.50"))
@@ -173,3 +214,20 @@ def test_filter_and_sort_prices_combines_domain_steps() -> None:
 
     assert [price.provider for price in result] == ["b", "a"]
     assert [price.price for price in result] == [Decimal("130"), Decimal("286")]
+
+
+def test_filter_and_sort_prices_applies_parcel_type_filter_before_sorting() -> None:
+    document = _make_price(provider="a", price=Decimal("220.00"), service_name="Document")
+    parcel = _make_price(provider="b", price=Decimal("100.00"), service_name="Parcel")
+    document_ru = _make_price(
+        provider="c",
+        price=Decimal("150.00"),
+        service_name="Документ курьером",
+    )
+
+    result = filter_and_sort_prices(
+        [document, parcel, document_ru],
+        parcel_type=ParcelType.DOC,
+    )
+
+    assert [price.provider for price in result] == ["c", "a"]

tests/services/test_aggregator.py

@@ -4,7 +4,7 @@ from decimal import Decimal
 import pytest
 
 from app.adapters.delivery_providers.base import ProviderRequestError
-from app.schemas.request import DeliveryEntity, DeliveryRequest
+from app.schemas.request import DeliveryEntity, DeliveryRequest, ParcelType
 from app.schemas.response import DeliveryPrice
 from app.services.aggregator import AggregatorService, InvalidDeliveryRequestError
 
@@ -68,6 +68,7 @@ def _make_request(**overrides: object) -> DeliveryRequest:
         "length_cm": 30.0,
         "width_cm": 20.0,
         "height_cm": 10.0,
+        "parcel_type": None,
     }
     payload.update(overrides)
     return DeliveryRequest(**payload)
@@ -195,6 +196,55 @@ def test_get_all_prices_cache_hit_skips_provider_call() -> None:
     assert cache.set_calls == []
 
 
+@pytest.mark.parametrize(
+    ("cache", "expected_provider_calls"),
+    [
+        (StubCache(), 1),
+        (
+            StubCache(
+                forced_get_value=[
+                    _make_price(
+                        "cdek",
+                        "100.40",
+                        service_name="DOCUMENT EXPRESS",
+                    ).model_dump(mode="json"),
+                    _make_price(
+                        "cdek",
+                        "200.40",
+                        service_name="Economy parcel",
+                    ).model_dump(mode="json"),
+                ]
+            ),
+            0,
+        ),
+    ],
+)
+def test_get_all_prices_applies_same_parcel_type_filter_for_fresh_and_cached_results(
+    cache: StubCache,
+    expected_provider_calls: int,
+) -> None:
+    provider = StubProvider(
+        name="cdek",
+        response=[
+            _make_price("cdek", "100.40", service_name="DOCUMENT EXPRESS"),
+            _make_price("cdek", "200.40", service_name="Economy parcel"),
+        ],
+    )
+    service = AggregatorService(
+        [provider],
+        cache=cache,
+        provider_price_multiplier=Decimal("1.1"),
+    )
+
+    result = asyncio.run(
+        service.get_all_prices(_make_request(parcel_type=ParcelType.DOC))
+    )
+
+    assert [price.service_name for price in result] == ["DOCUMENT EXPRESS"]
+    assert [price.price for price in result] == [Decimal("110")]
+    assert len(provider.calls) == expected_provider_calls
+
+
 def test_get_all_prices_delegates_filtering_and_sorting_to_domain_logic() -> None:
     provider_a = StubProvider(
         name="a",
@@ -206,11 +256,13 @@ def test_get_all_prices_delegates_filtering_and_sorting_to_domain_logic() -> Non
     provider_b = StubProvider(name="b", response=[_make_price("b", "100.00")])
     delegated_inputs: list[list[DeliveryPrice]] = []
     delegated_multipliers: list[Decimal] = []
+    delegated_parcel_types: list[object | None] = []
 
-    def fake_filter_and_sort(prices, *, price_multiplier):
+    def fake_filter_and_sort(prices, *, price_multiplier, parcel_type):
         price_list = list(prices)
         delegated_inputs.append(price_list)
         delegated_multipliers.append(price_multiplier)
+        delegated_parcel_types.append(parcel_type)
         return [price_list[0]]
 
     service = AggregatorService(
@@ -220,7 +272,7 @@ def test_get_all_prices_delegates_filtering_and_sorting_to_domain_logic() -> Non
         filter_and_sort_prices_fn=fake_filter_and_sort,
     )
 
-    result = asyncio.run(service.get_all_prices(_make_request()))
+    result = asyncio.run(service.get_all_prices(_make_request(parcel_type=ParcelType.PARCEL)))
 
     assert [price.provider for price in delegated_inputs[0]] == ["a", "a", "b"]
     assert [price.service_name for price in delegated_inputs[0]] == [
@@ -229,4 +281,5 @@ def test_get_all_prices_delegates_filtering_and_sorting_to_domain_logic() -> Non
         "standard",
     ]
     assert delegated_multipliers == [Decimal("1.23")]
+    assert delegated_parcel_types == [ParcelType.PARCEL]
     assert [price.provider for price in result] == ["a"]