From 770bf1293d272fccc57f76445b34323d916b54d5 Mon Sep 17 00:00:00 2001
From: Daniel Roth <daniel_roth@hotmail.co.uk>
Date: Thu, 16 Apr 2026 14:09:36 +0000
Subject: [PATCH] =?UTF-8?q?Load=20BuildingMeasurements=20from=20SiteNotes?=
 =?UTF-8?q?=20JSON=20=F0=9F=9F=A9?=
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---
 backend/documents_parser/extractor.py | 58 ++++++++++++++++++++++++++-
 1 file changed, 57 insertions(+), 1 deletion(-)

diff --git a/backend/documents_parser/extractor.py b/backend/documents_parser/extractor.py
index 44ddb65f..fc2ca2ac 100644
--- a/backend/documents_parser/extractor.py
+++ b/backend/documents_parser/extractor.py
@@ -5,9 +5,12 @@ from datatypes.epc.surveys.pashub_rdsap_site_notes import (
     BuildingConstruction,
     BuildingMeasurements,
     ExtensionConstruction,
+    ExtensionMeasurements,
     FloorConstruction,
+    FloorMeasurement,
     General,
     MainBuildingConstruction,
+    MainBuildingMeasurements,
     PasHubRdSapSiteNotes,
 )
 
@@ -185,7 +188,60 @@ class PasHubRdSapSiteNotesExtractor:
         )
 
     def extract_building_measurements(self) -> BuildingMeasurements:
-        raise NotImplementedError
+        bm_section = self._section("Building Measurements", "Roof Space")
+
+        extension_markers = []
+        i = 1
+        while f"Extension {i}" in bm_section:
+            extension_markers.append(f"Extension {i}")
+            i += 1
+
+        main_start = bm_section.index("Main Building")
+        main_end = (
+            bm_section.index(extension_markers[0])
+            if extension_markers
+            else len(bm_section)
+        )
+        main_floors = self._parse_floor_measurements(bm_section[main_start:main_end])
+
+        extensions = []
+        for n, marker in enumerate(extension_markers):
+            ext_start = bm_section.index(marker)
+            ext_end = (
+                bm_section.index(extension_markers[n + 1])
+                if n + 1 < len(extension_markers)
+                else len(bm_section)
+            )
+            extensions.append(
+                ExtensionMeasurements(
+                    id=n + 1,
+                    floors=self._parse_floor_measurements(bm_section[ext_start:ext_end]),
+                )
+            )
+
+        return BuildingMeasurements(
+            main_building=MainBuildingMeasurements(floors=main_floors),
+            extensions=extensions if extensions else None,
+        )
+
+    def _parse_floor_measurements(self, data: List[str]) -> List[FloorMeasurement]:
+        floors = []
+        i = 0
+        while i < len(data):
+            if data[i].startswith("Floor") and i + 4 < len(data):
+                floors.append(
+                    FloorMeasurement(
+                        name=data[i],
+                        area_m2=float(data[i + 1]),
+                        height_m=float(data[i + 2]),
+                        heat_loss_perimeter_m=float(data[i + 3]),
+                        pwl_m=float(data[i + 4]),
+                    )
+                )
+                i += 5
+            else:
+                i += 1
+        return floors
 
     def _parse_floor_construction(self, data: List[str]) -> FloorConstruction:
         return FloorConstruction(