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45 lines
1.1 KiB
Python
45 lines
1.1 KiB
Python
"""Application service for listing Explore banners.
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ExploreBanner is the legacy contract name shared by the API, feature flag, and database model.
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"""
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from collections.abc import Sequence
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from datetime import datetime
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from typing import Any, NamedTuple, Protocol
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_DEFAULT_LANGUAGE = "en-US"
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class ExploreBannerRecord(NamedTuple):
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id: str
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content: dict[str, Any]
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link: str
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sort: int
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status: str
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created_at: datetime
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class ExploreBannerQuery(Protocol):
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def list_enabled(self, language: str) -> Sequence[ExploreBannerRecord]: ...
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class ExploreBannerQueryService:
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def __init__(
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self,
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*,
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banners: ExploreBannerQuery,
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enabled: bool,
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) -> None:
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self._banners = banners
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self._enabled = enabled
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def list_for_language(self, language: str) -> tuple[ExploreBannerRecord, ...]:
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if not self._enabled:
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return ()
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banners = tuple(self._banners.list_enabled(language))
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if banners or language == _DEFAULT_LANGUAGE:
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return banners
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return tuple(self._banners.list_enabled(_DEFAULT_LANGUAGE))
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