Khalim Conn-Kowlessar bd25a3c774 mapper: disambiguate SY system-built from B basement wall (both share code 6) ... RdSAP10 `wall_construction == 6` is canonically WALL_SYSTEM_BUILT — a WALL TYPE — but the gov-EPC basement heuristic hijacked it: Elmhurst lodges both "SY System build" and "B Basement wall" as code 6, and the API lodges basements as code 6 too, so a system-built wall was mis-flagged `main_wall_is_basement` → wrong RdSAP §5.17 / Table 23 u_basement_wall/u_basement_floor overrides, and downstream the solid-wall Recommendation Generator couldn't offer EWI/IWI on system-built walls. System-built stays the wall type on its canonical code 6; the basement signal moves OFF code 6 to a dedicated `is_basement` (SapAlternativeWall) / `wall_is_basement` (SapBuildingPart) Optional[bool] flag: - Elmhurst: `_elmhurst_wall_is_basement` sets it from the distinct "SY"/"B" labels (False for SY, True for B, None otherwise). - gov-EPC API: per-wall code 6 can't be told apart at lodging time, so `from_api_response` post-processes via `_clear_basement_flag_when_ system_built` — when the cert addendum marks the dwelling system-built, the code-6 basement heuristic is cleared. A genuine basement (no addendum signal) keeps the code-6 fallback. - `main_wall_is_basement` / `is_basement_wall` honour the flag when set, else fall back to the code-6 heuristic — so untouched API basements and the cert 000565 "B" cohort are unchanged. `EpcPropertyData.system_build` is a derived property over the wall type: the MAIN wall is system-built iff `wall_construction == 6` and it is not flagged basement. System-built lives on `wall_construction`; the basement attribute is separate. Acceptance: a system-built main wall (Elmhurst SY, or API addendum system_build) → wall_construction == 6, main_wall_is_basement is False, system_build is True; a genuine basement main wall → main_wall_is_basement is True, system_build is False. Full §4 suite green (2404 passed). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>		2026-06-04 19:39:18 +00:00
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epc	mapper: disambiguate SY system-built from B basement wall (both share code 6)	2026-06-04 19:39:18 +00:00
magicplan	typing and renaming 🟪	2026-05-07 13:26:49 +00:00
__init__.py	further breaking up code	2023-07-20 12:24:34 +01:00
datatypes.py	further breaking up code	2023-07-20 12:24:34 +01:00
enums.py	completed build of new demo portfolio - some fixed required still	2023-11-20 14:42:16 +00:00