AvailabilityDetector: set maximum distance to 150 meters (fixes #4)

app/src/main/java/net/vonforst/evmap/api/availability/AvailabilityDetector.kt

@@ -18,6 +18,8 @@ interface AvailabilityDetector {
 }
 
 abstract class BaseAvailabilityDetector(private val client: OkHttpClient) : AvailabilityDetector {
+    protected val radius = 150  // max radius in meters
+
     protected suspend fun httpGet(url: String): String {
         val request = Request.Builder().url(url).build()
         val response = client.newCall(request).await()

app/src/main/java/net/vonforst/evmap/api/availability/ChargecloudAvailabilityDetector.kt

@@ -8,8 +8,6 @@ import okhttp3.OkHttpClient
 import org.json.JSONObject
 import java.io.IOException
 
-private const val radius = 200  // max radius in meters
-
 class ChargecloudAvailabilityDetector(
     client: OkHttpClient,
     private val operatorId: String

app/src/main/java/net/vonforst/evmap/api/availability/NewMotionAvailabilityDetector.kt

@@ -99,6 +99,16 @@ class NewMotionAvailabilityDetector(client: OkHttpClient, baseUrl: String? = nul
             distanceBetween(marker.coordinates.latitude, marker.coordinates.longitude, lat, lng)
         } ?: throw AvailabilityDetectorException("no candidates found.")
 
+        if (distanceBetween(
+                nearest.coordinates.latitude,
+                nearest.coordinates.longitude,
+                lat,
+                lng
+            ) > radius
+        ) {
+            throw AvailabilityDetectorException("no candidates found")
+        }
+
         // combine related stations
         markers = markers.filter { marker ->
             distanceBetween(