Add address lookup using OpenStreetMap data

Integrate Nominatim API endpoint to geocode addresses with rate limiting and user-agent configuration.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: e5565357-90e1-419f-b9a8-6ee8394636df
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/6d543d2c-20b9-4ea6-93fe-70fe9b1d9f80/e5565357-90e1-419f-b9a8-6ee8394636df/TFybNy5

server/routes.ts

@@ -3303,6 +3303,68 @@ export async function registerRoutes(app: Express): Promise<Server> {
     }
   });
 
+  // ============= GEOCODING API (Nominatim/OSM) =============
+  
+  // Rate limiter semplice per rispettare 1 req/sec di Nominatim
+  let lastGeocodingRequest = 0;
+  
+  app.post("/api/geocode", isAuthenticated, async (req: any, res) => {
+    try {
+      const { address } = req.body;
+      
+      if (!address || typeof address !== 'string') {
+        return res.status(400).json({ message: "Address parameter required" });
+      }
+      
+      // Rispetta rate limit di 1 req/sec
+      const now = Date.now();
+      const timeSinceLastRequest = now - lastGeocodingRequest;
+      if (timeSinceLastRequest < 1000) {
+        const waitTime = 1000 - timeSinceLastRequest;
+        await new Promise(resolve => setTimeout(resolve, waitTime));
+      }
+      lastGeocodingRequest = Date.now();
+      
+      // Chiama Nominatim API
+      const nominatimUrl = new URL("https://nominatim.openstreetmap.org/search");
+      nominatimUrl.searchParams.set("q", address);
+      nominatimUrl.searchParams.set("format", "json");
+      nominatimUrl.searchParams.set("limit", "1");
+      nominatimUrl.searchParams.set("addressdetails", "1");
+      
+      const response = await fetch(nominatimUrl.toString(), {
+        headers: {
+          "User-Agent": "VigilanzaTurni/1.0 (Security Shift Management System)",
+        },
+      });
+      
+      if (!response.ok) {
+        throw new Error(`Nominatim API error: ${response.status}`);
+      }
+      
+      const data = await response.json();
+      
+      if (!data || data.length === 0) {
+        return res.status(404).json({ 
+          message: "Indirizzo non trovato. Prova a essere più specifico (es. Via, Città, Italia)" 
+        });
+      }
+      
+      const result = data[0];
+      
+      res.json({
+        latitude: result.lat,
+        longitude: result.lon,
+        displayName: result.display_name,
+        address: result.address,
+      });
+      
+    } catch (error) {
+      console.error("Error geocoding address:", error);
+      res.status(500).json({ message: "Errore durante la geocodifica dell'indirizzo" });
+    }
+  });
+
   const httpServer = createServer(app);
   return httpServer;
 }