feat(map): derive station regions from GPS

station-navigation/server.py

@@ -28,6 +28,7 @@ OPEN_PLATFORM_BASE_URL = os.getenv("OPEN_PLATFORM_BASE_URL", "https://open.d.lno
 OPEN_PLATFORM_APP_KEY = os.getenv("OPEN_PLATFORM_APP_KEY", "").strip()
 UPSTREAM_TIMEOUT_SECONDS = float(os.getenv("UPSTREAM_TIMEOUT_SECONDS", "15"))
 STATION_CACHE_SECONDS = int(os.getenv("STATION_NAVIGATION_CACHE_SECONDS", "120"))
+VEHICLE_MAP_INTERNAL_BASE_URL = os.getenv("VEHICLE_MAP_INTERNAL_BASE_URL", "http://127.0.0.1:20800").rstrip("/")
 _cache_lock = threading.Lock()
 _cache = {}
 
@@ -91,27 +92,24 @@ def _cached(key, ttl_seconds, loader):
     return value
 
 
-def _public_station(station):
-    """Positive allowlist: do not add operational or hydrogen fields here."""
-    fields = (
-        "id", "name", "shortName", "province", "city", "district", "address",
-        "longitude", "latitude", "cooperative",
-    )
-    return {field: station.get(field) for field in fields if station.get(field) is not None}
-
-
 def _load_station_directory():
-    stations = _post_open_platform("/api/v1/hydrogen-stations/query", {})
-    directory = [_public_station(station) for station in stations]
-    return {
-        "status": "ok",
-        "asOf": time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()),
-        "summary": {
-            "totalStations": len(directory),
-            "cooperativeStations": sum(1 for station in directory if station.get("cooperative")),
-        },
-        "stations": directory,
-    }
+    """Use the operations map's GPS-resolved public station directory.
+
+    The map service owns reverse-geocoding and its persistent cache, keeping
+    the public navigation view and the operations view on identical boundaries.
+    """
+    request = Request(
+        VEHICLE_MAP_INTERNAL_BASE_URL + "/api/stations",
+        headers={"Accept": "application/json", "User-Agent": "lingniu-station-navigation/1.0"},
+    )
+    try:
+        with urlopen(request, timeout=UPSTREAM_TIMEOUT_SECONDS) as response:
+            payload = json.load(response)
+    except (HTTPError, URLError, ValueError) as exc:
+        raise RuntimeError("vehicle map station directory unavailable: {}".format(exc)) from exc
+    if payload.get("status") != "ok" or not isinstance(payload.get("stations"), list):
+        raise RuntimeError("vehicle map returned an invalid station directory")
+    return payload
 
 
 def _prewarm_station_directory_cache():