260719_9

B05_wf2_Route/B05_wf2_Route_Engine_Sections.py

@@ -33,6 +33,30 @@ def _load_route_polyline(project_root: Path, route_data_path: str) -> list[list[
     return [[float(c[0]), float(c[1]), float(c[2]) if len(c) > 2 else 0.0] for c in coords]
 
 
+def cross_filename(chainage_m: float) -> str:
+    """측점 chainage에 대응하는 횡단면 파일명(단일 규칙)."""
+    return f"cross_{int(round(float(chainage_m))):05d}m.json"
+
+
+def prune_stale_cross_files(cross_dir: Path, stations: list[Any]) -> set[str]:
+    """stations에 없는 잔재 cross_*.json을 삭제하고 유효 파일명 집합을 반환한다.
+
+    측점 정보가 비어 있으면 오삭제를 피하기 위해 아무것도 지우지 않고
+    빈 집합을 반환한다(호출부는 빈 집합이면 필터를 생략한다).
+    """
+    valid = {
+        cross_filename(station["chainage_m"])
+        for station in stations
+        if isinstance(station, dict) and isinstance(station.get("chainage_m"), (int, float))
+    }
+    if not valid:
+        return valid
+    for path in cross_dir.glob("cross_*.json"):
+        if path.name not in valid:
+            path.unlink(missing_ok=True)
+    return valid
+
+
 def _cross_summary(cross_section: dict[str, Any]) -> dict[str, Any]:
     """횡단면 상세에서 DB data 컬럼에 저장할 요약을 만든다."""
     samples = cross_section.get("samples", [])
@@ -101,8 +125,7 @@ def run_section_generation(
     cross_records: list[dict[str, Any]] = []
     for seq, cross_section in enumerate(result["cross_sections"]):
         chainage = float(cross_section["chainage_m"])
-        filename = f"cross_{int(round(chainage)):05d}m.json"
-        cross_file = cross_dir / filename
+        cross_file = cross_dir / cross_filename(chainage)
         atomic_write_json(cross_file, cross_section)
         cross_records.append(
             {