定位获取城市功能，需要微信地图的key？

apps/h5-user/src/lib/region-data.ts

@@ -70,6 +70,31 @@ export const DEFAULT_REGION: RegionSelection = {
   district: '金水区',
 };
 
+export const FALLBACK_CITY_REGION: RegionSelection = {
+  province: '河南省',
+  city: '郑州市',
+  district: REGION_ALL,
+};
+
+export function regionFromGeo(province: string, city: string, district?: string): RegionSelection {
+  const cityName = city.endsWith('市') ? city : `${city}市`;
+  const provinceInTree = PROVINCES.includes(province) ? province : DEFAULT_REGION.province;
+  const cities = getCities(provinceInTree);
+  const matchedCity = cities.includes(cityName)
+    ? cityName
+    : cities.find((c) => c.replace(/市$/, '') === city.replace(/市$/, '')) ?? cityName;
+  const districts = getDistricts(provinceInTree, matchedCity);
+  const districtName =
+    district && districts.includes(district)
+      ? district
+      : REGION_ALL;
+  return normalizeRegionSelection({
+    province: provinceInTree,
+    city: cities.includes(matchedCity) ? matchedCity : matchedCity,
+    district: districtName,
+  });
+}
+
 /** 校验已选地区是否仍存在于数据源中 */
 export function normalizeRegionSelection(selection: RegionSelection): RegionSelection {
   if (selection.province === REGION_ALL) {