Implement OpenCellID location provider

2 files changed, 45 insertions, 3 deletions

diff --git a/src/org/traccar/location/LocationProvider.java b/src/org/traccar/location/LocationProvider.java
index cbc9663f8..2bff1a7ca 100644
--- a/src/org/traccar/location/LocationProvider.java
+++ b/src/org/traccar/location/LocationProvider.java
@@ -21,7 +21,9 @@ public interface LocationProvider {
 
     interface LocationProviderCallback {
 
-        void onResult(double latitude, double longitude);
+        void onSuccess(double latitude, double longitude);
+
+        void onFailure();
 
     }
 
diff --git a/src/org/traccar/location/OpenCellIdLocationProvider.java b/src/org/traccar/location/OpenCellIdLocationProvider.java
index 22456c482..2339585ad 100644
--- a/src/org/traccar/location/OpenCellIdLocationProvider.java
+++ b/src/org/traccar/location/OpenCellIdLocationProvider.java
@@ -15,10 +15,50 @@
  */
 package org.traccar.location;
 
+import com.ning.http.client.AsyncCompletionHandler;
+import com.ning.http.client.Response;
+import org.traccar.Context;
+
+import javax.json.Json;
+import javax.json.JsonObject;
+import javax.json.JsonReader;
+
 public class OpenCellIdLocationProvider extends BaseLocationProvider {
 
-    protected void getLocation(int mcc, int mnc, long lac, long cid, LocationProviderCallback callback) {
-        // TODO
+    private String url;
+
+    public OpenCellIdLocationProvider(String key) {
+        this("http://opencellid.org/cell/get", key);
+    }
+
+    public OpenCellIdLocationProvider(String url, String key) {
+        this.url = url + "?format=json&mcc=%d&mnc=%d&lac=%d&cellid=%d&key=" + key;
+    }
+
+    protected void getLocation(int mcc, int mnc, long lac, long cid, final LocationProviderCallback callback) {
+        String x = String.format(url, mcc, mnc, lac, cid);
+        Context.getAsyncHttpClient().prepareGet(String.format(url, mcc, mnc, lac, cid))
+                .execute(new AsyncCompletionHandler() {
+                    @Override
+                    public Object onCompleted(Response response) throws Exception {
+                        try (JsonReader reader = Json.createReader(response.getResponseBodyAsStream())) {
+                            JsonObject json = reader.readObject();
+                            if (json.containsKey("lat") && json.containsKey("lon")) {
+                                callback.onSuccess(
+                                        json.getJsonNumber("lat").doubleValue(),
+                                        json.getJsonNumber("lon").doubleValue());
+                            } else {
+                                callback.onFailure();
+                            }
+                        }
+                        return null;
+                    }
+
+                    @Override
+                    public void onThrowable(Throwable t) {
+                        callback.onFailure();
+                    }
+                });
     }
 
 }