Support database region

api/s32_region_util.py

@@ -0,0 +1,15 @@
+
+def from_postgis_polygon(polygon: str) -> list[tuple[float, float]]:
+    boundary = polygon.lower().removeprefix('polygon((').removesuffix('))').split(',')
+    xys = []
+    for pt in boundary:
+        xy = pt.split(' ')
+        xys.append((float(xy[0]), float(xy[1])))
+    return xys
+
+
+def to_postgis_polygon(boundary: list[tuple[float, float]]) -> str:
+    polygon = ''
+    for pt in boundary:
+        polygon += f'{pt[0]} {pt[1]},'
+    return f'polygon(({polygon[:-1]}))'