70 lines
1.7 KiB
Python
70 lines
1.7 KiB
Python
"""
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Service layer data transfer objects.
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These dataclasses represent the data returned by service functions,
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providing explicit types instead of raw dicts or ORM objects.
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"""
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from dataclasses import dataclass
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from datetime import datetime
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@dataclass(frozen=True)
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class AssetData:
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"""Plain data extracted from an Asset ORM object."""
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hash: str
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size_bytes: int | None
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mime_type: str | None
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@dataclass(frozen=True)
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class AssetInfoData:
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"""Plain data extracted from an AssetInfo ORM object."""
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id: str
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name: str
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user_metadata: dict | None
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preview_id: str | None
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created_at: datetime
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updated_at: datetime
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last_access_time: datetime | None
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@dataclass(frozen=True)
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class AssetDetailResult:
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"""Result from get_asset_detail and similar operations."""
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info: AssetInfoData
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asset: AssetData | None
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tags: list[str]
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@dataclass(frozen=True)
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class RegisterAssetResult:
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"""Result from register_existing_asset."""
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info: AssetInfoData
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asset: AssetData
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tags: list[str]
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created: bool
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def extract_info_data(info) -> AssetInfoData:
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"""Extract plain data from an AssetInfo ORM object."""
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return AssetInfoData(
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id=info.id,
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name=info.name,
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user_metadata=info.user_metadata,
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preview_id=info.preview_id,
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created_at=info.created_at,
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updated_at=info.updated_at,
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last_access_time=info.last_access_time,
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)
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def extract_asset_data(asset) -> AssetData | None:
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"""Extract plain data from an Asset ORM object."""
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if asset is None:
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return None
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return AssetData(
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hash=asset.hash,
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size_bytes=asset.size_bytes,
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mime_type=asset.mime_type,
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)
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