62 lines
3.1 KiB
Python
62 lines
3.1 KiB
Python
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from decimal import Decimal
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from typing import Any
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from app.domain.enums import NormalizationStatus, ValueType
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from app.domain.models import AttributeDefinition, AttributeStatement
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from app.errors import AppError
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class ManualNormalizer:
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version = "manual-v1"
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def validate(self, definition: AttributeDefinition, statement: AttributeStatement) -> AttributeStatement:
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if statement.normalization_status == NormalizationStatus.UNKNOWN:
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if statement.normalized_value is not None:
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raise AppError(
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422,
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"NORMALIZATION_INCONSISTENT",
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"unknown statements must not have a normalized_value",
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)
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return statement
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if statement.normalization_status != NormalizationStatus.NORMALIZED:
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raise AppError(422, "NORMALIZATION_STATUS", "unsupported normalization_status")
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if statement.normalized_value is None:
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raise AppError(422, "NORMALIZATION_MISSING", "normalized_value is required")
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_assert_type(definition, statement.normalized_value)
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if definition.value_type == ValueType.NUMBER:
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number = Decimal(str(statement.normalized_value))
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if definition.key == "weight_kg" and number <= 0:
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raise AppError(422, "VALUE_RANGE", "weight_kg must be > 0")
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if definition.minimum is not None and number < definition.minimum:
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raise AppError(422, "VALUE_RANGE", f"{definition.key} is below the minimum")
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if definition.maximum is not None and number > definition.maximum:
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raise AppError(422, "VALUE_RANGE", f"{definition.key} is above the maximum")
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if definition.canonical_unit and statement.unit != definition.canonical_unit:
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raise AppError(
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422,
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"UNIT_MISMATCH",
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"unit must match the canonical unit",
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{"expected": definition.canonical_unit, "actual": statement.unit},
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)
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if definition.canonical_unit is None and statement.unit not in {None, ""}:
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raise AppError(422, "UNIT_MISMATCH", "this attribute has no canonical unit")
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return statement
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def _assert_type(definition: AttributeDefinition, value: Any) -> None:
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if definition.value_type == ValueType.NUMBER:
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if isinstance(value, bool) or not isinstance(value, (int, float, Decimal)):
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raise AppError(422, "TYPE_MISMATCH", "normalized_value must be a number")
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return
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if definition.value_type == ValueType.STRING:
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if not isinstance(value, str):
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raise AppError(422, "TYPE_MISMATCH", "normalized_value must be a string")
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return
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if definition.value_type == ValueType.BOOLEAN:
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if not isinstance(value, bool):
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raise AppError(422, "TYPE_MISMATCH", "normalized_value must be a boolean")
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return
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if definition.value_type == ValueType.STRING_LIST:
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if not isinstance(value, list) or any(not isinstance(item, str) for item in value):
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raise AppError(422, "TYPE_MISMATCH", "normalized_value must be a list of strings")
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