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dab2e759bf
Slice 3a (ADR-0020). PlanningRestrictions relocated out of the solid-wall generator into domain/geospatial/ as the shared, Property-level value object (three distinct flags + measure-specific blocks_external/blocks_internal). GeospatialRepository gains a non-abstract planning_restrictions_for defaulting to None (sources without the flags need not implement it); GeospatialS3Repository reads conservation_status/is_listed_building/is_heritage_building from the same Open-UPRN partition as the coordinates (legacy column names — to confirm in the S3 deep-dive). Shared _row_for helper dedups the partition lookup. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
35 lines
1.4 KiB
Python
35 lines
1.4 KiB
Python
"""A Property's planning protections, resolved from geospatial reference data.
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Three distinct flags (never the legacy collapsed `restricted_measures` boolean
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— ADR-0020): a conservation area, a listed building, a heritage building. They
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gate retrofit measures differently — a conservation area blocks external work
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only, while listed/heritage protect the fabric itself — so the
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measure-specific interpretation (`blocks_external` / `blocks_internal`) lives
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here as derived queries. Sourced onto the Property from the geospatial layer
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(co-located with the coordinates); defaults to unrestricted.
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"""
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from dataclasses import dataclass
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@dataclass(frozen=True)
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class PlanningRestrictions:
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"""The planning protections on a Property that gate wall insulation
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(ADR-0019). Defaults to unrestricted."""
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in_conservation_area: bool = False
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is_listed: bool = False
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is_heritage: bool = False
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@property
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def blocks_external(self) -> bool:
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"""External wall insulation is blocked by any protection (it alters the
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external appearance / protected fabric)."""
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return self.in_conservation_area or self.is_listed or self.is_heritage
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@property
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def blocks_internal(self) -> bool:
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"""Internal wall insulation is blocked only where the fabric itself is
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protected — a listed or heritage building, not a plain conservation
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area."""
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return self.is_listed or self.is_heritage
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