feat: add project-scoped operations

app/services/reverse_geocoding.py

@@ -0,0 +1,72 @@
+import json
+from typing import Any
+
+import httpx
+
+from app.core.config import settings
+from app.domain.schemas.place_search import PlaceSearchItem, ReverseGeocodingRequest
+from app.domain.schemas.project_map_config import PlaceSearchConfig
+from app.services.place_search import PlaceSearchError, PlaceSearchScopeError, validate_place_scope
+
+
+async def reverse_geocode_tianditu(
+    request: ReverseGeocodingRequest,
+    *,
+    config: PlaceSearchConfig,
+    client: httpx.AsyncClient | None = None,
+) -> PlaceSearchItem:
+    if not config.enabled:
+        raise PlaceSearchError(503, "当前项目暂未配置地名搜索")
+    if not settings.TIANDITU_TOKEN:
+        raise PlaceSearchError(503, "地名搜索服务未配置")
+    params = {
+        "postStr": json.dumps({"lon": request.longitude, "lat": request.latitude, "ver": 1}),
+        "type": "geocode",
+        "tk": settings.TIANDITU_TOKEN,
+    }
+    try:
+        if client is not None:
+            response = await client.get(settings.TIANDITU_GEOCODER_URL, params=params)
+        else:
+            async with httpx.AsyncClient(timeout=settings.TIANDITU_SEARCH_TIMEOUT_SECONDS) as managed:
+                response = await managed.get(settings.TIANDITU_GEOCODER_URL, params=params)
+        response.raise_for_status()
+    except httpx.TimeoutException:
+        raise PlaceSearchError(504, "地图取点查询超时，请重新取点") from None
+    except httpx.HTTPError:
+        raise PlaceSearchError(502, "天地图反编码服务暂不可用，请重新取点") from None
+    try:
+        return _parse_reverse_response(response.json(), request, config)
+    except PlaceSearchScopeError:
+        raise PlaceSearchError(422, f"取点位置不在当前项目的地名搜索范围内（{config.region}）") from None
+    except (ValueError, TypeError, KeyError, AttributeError):
+        raise PlaceSearchError(502, "天地图返回了无效的反编码结果，请重新取点") from None
+
+
+def _parse_reverse_response(
+    payload: dict[str, Any], request: ReverseGeocodingRequest, config: PlaceSearchConfig,
+) -> PlaceSearchItem:
+    if str(payload.get("status")) != "0":
+        raise PlaceSearchError(502, "天地图反编码请求失败，请重新取点")
+    result = payload.get("result")
+    if not result:
+        raise PlaceSearchError(404, "该位置未找到地名或地址，请重新取点")
+    address = result.get("formatted_address")
+    if not isinstance(address, str) or not address.strip():
+        raise PlaceSearchError(404, "该位置未找到地名或地址，请重新取点")
+    component = result.get("addressComponent") or {}
+    validate_place_scope(
+        config, county_code=str(component.get("county_code") or ""),
+        county=str(component.get("county") or ""),
+        province_code=str(component.get("province_code") or ""),
+    )
+    name = component.get("poi") or component.get("road") or address
+    if not isinstance(name, str) or not name.strip():
+        raise ValueError("Invalid place name")
+    # A nearby POI can have a different center. Always retain the clicked point.
+    return PlaceSearchItem(
+        id=f"map:{request.longitude:.8f},{request.latitude:.8f}",
+        name=name.strip(), address=address.strip(), longitude=request.longitude, latitude=request.latitude,
+        category="附近地名" if component.get("poi") else "地址",
+        district=str(component.get("county") or config.region),
+    )