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EpcSimulation is the Simulation Overlay — a narrow all-optional partial mirror of EpcPropertyData/SapBuildingPart (wall surface first), targeting building parts by BuildingPartIdentifier (composition, not inheritance). apply_simulations(baseline, simulations) deep-copies the baseline, folds overlays in order (later wins on a shared field) via a generic non-None field write, and returns a throwaway EpcPropertyData for the calculator; the baseline is never mutated. Four behaviour tests (hand-built EPD from the 000490 fixture, no PDF): targeted-write-leaves-others-untouched, empty-overlay no-op, sequential last-wins, baseline-immutability. pyright strict clean. Slice 1 of the Modelling stage rebuild (ADR-0016). Closes #1153. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
34 lines
1.4 KiB
Python
34 lines
1.4 KiB
Python
"""The Overlay Applicator — folds an ordered set of Simulation Overlays onto
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a baseline EpcPropertyData and returns a new one for the calculator.
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Sequential fold: overlays are applied in order and a later overlay wins on a
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field it shares with an earlier one. The baseline is never mutated; the
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returned EpcPropertyData is throwaway (handed to the calculator for scoring,
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then discarded). See ADR-0016.
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"""
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import copy
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from dataclasses import fields
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from typing import Sequence
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from datatypes.epc.domain.epc_property_data import EpcPropertyData
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from domain.modelling.simulation import EpcSimulation
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def apply_simulations(
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baseline: EpcPropertyData, simulations: Sequence[EpcSimulation]
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) -> EpcPropertyData:
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"""Return a copy of ``baseline`` with every Simulation Overlay's non-``None``
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fields written onto the building part it targets, applied in order."""
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result: EpcPropertyData = copy.deepcopy(baseline)
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parts_by_id = {part.identifier: part for part in result.sap_building_parts}
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for simulation in simulations:
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for identifier, overlay in simulation.building_parts.items():
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part = parts_by_id[identifier]
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for overlay_field in fields(overlay):
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value = getattr(overlay, overlay_field.name)
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if value is not None:
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setattr(part, overlay_field.name, value)
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return result
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