Switch location bias from a point to a bounding box for improved autocomplete accuracy and validation.

server/src/routes/maps.ts

@@ -39,8 +39,13 @@ router.post('/autocomplete', authenticate, async (req: Request, res: Response) =
     return res.status(400).json({ error: 'Input is required' });
   }
 
-  if (locationBias && (!Number.isFinite(locationBias.lat) || !Number.isFinite(locationBias.lng))) {
-    return res.status(400).json({ error: 'Invalid locationBias: lat and lng must be finite numbers' });
+  if (locationBias) {
+    const { low, high } = locationBias;
+    if (!low || !high
+      || !Number.isFinite(low.lat) || !Number.isFinite(low.lng)
+      || !Number.isFinite(high.lat) || !Number.isFinite(high.lng)) {
+      return res.status(400).json({ error: 'Invalid locationBias: low and high must have finite lat and lng' });
+    }
   }
 
   try {
@@ -48,7 +53,7 @@ router.post('/autocomplete', authenticate, async (req: Request, res: Response) =
       authReq.user.id,
       input,
       lang as string,
-      locationBias as { lat: number; lng: number } | undefined,
+      locationBias as { low: { lat: number; lng: number }; high: { lat: number; lng: number } } | undefined,
     );
     res.json(result);
   } catch (err: unknown) {

server/src/services/mapsService.ts

@@ -319,7 +319,7 @@ export async function autocompletePlaces(
   userId: number,
   input: string,
   lang?: string,
-  locationBias?: { lat: number; lng: number },
+  locationBias?: { low: { lat: number; lng: number }; high: { lat: number; lng: number } },
 ): Promise<{ suggestions: { placeId: string; mainText: string; secondaryText: string }[]; source: string }> {
   const apiKey = getMapsKey(userId);
 
@@ -333,9 +333,9 @@ export async function autocompletePlaces(
   };
   if (locationBias) {
     body.locationBias = {
-      circle: {
-        center: { latitude: locationBias.lat, longitude: locationBias.lng },
-        radius: 50000.0,
+      rectangle: {
+        low: { latitude: locationBias.low.lat, longitude: locationBias.low.lng },
+        high: { latitude: locationBias.high.lat, longitude: locationBias.high.lng },
       },
     };
   }