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utils/geo.py

@@ -1,21 +1,29 @@
-import requests
-def city_to_coordinates(city):
-    url = "https://nominatim.openstreetmap.org/search"
-
-    params = {
-        "q": city,
-        "format": "json",
-        "limit": 1
-    }
-
-    headers = {
-        "User-Agent": "PlantWise"
-    }
-
-    response = requests.get(url, params=params, headers=headers)
-    data = response.json()
-
-    if not data:
-        return None
-
-    return float(data[0]["lat"]), float(data[0]["lon"])
+import requests
+
+_geo_cache = {}
+
+def city_to_coordinates(city):
+    """Convert a city name to (lat, lon) using Open-Meteo's geocoding API."""
+    if city in _geo_cache:
+        return _geo_cache[city]
+
+    url = "https://geocoding-api.open-meteo.com/v1/search"
+    params = {
+        "name": city.strip(),
+        "count": 1,
+        "format": "json"
+    }
+
+    try:
+        response = requests.get(url, params=params, timeout=10)
+        response.raise_for_status()
+        data = response.json()
+        results = data.get("results")
+        if not results:
+            return None
+        coords = (results[0]["latitude"], results[0]["longitude"])
+        _geo_cache[city] = coords
+        return coords
+    except (requests.RequestException, ValueError) as e:
+        print(f"city_to_coordinates failed for '{city}': {e}")
+        return None