From 6ec22b7a68b5334e215662e4cb83a20f9a1cad18 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Wed, 18 Nov 2015 14:01:00 +1300
Subject: Implement OpenCellID location provider

---
 src/org/traccar/location/LocationProvider.java     |  4 +-
 .../location/OpenCellIdLocationProvider.java       | 44 +++++++++++++++++++++-
 .../org/traccar/location/LocationProviderTest.java | 15 +++++---
 3 files changed, 55 insertions(+), 8 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();
+                    }
+                });
     }
 
 }
diff --git a/test/org/traccar/location/LocationProviderTest.java b/test/org/traccar/location/LocationProviderTest.java
index c4aedbb09..b7280cfea 100644
--- a/test/org/traccar/location/LocationProviderTest.java
+++ b/test/org/traccar/location/LocationProviderTest.java
@@ -24,20 +24,25 @@ public class LocationProviderTest {
     }
 
     public void testOpenCellId() {
-        OpenCellIdLocationProvider locationProvider = new OpenCellIdLocationProvider();
+        OpenCellIdLocationProvider locationProvider = new OpenCellIdLocationProvider("fake");
 
         Map<String, Object> attributes = new HashMap<>();
-        attributes.put(Event.KEY_MCC, 250);
+        attributes.put(Event.KEY_MCC, 260);
         attributes.put(Event.KEY_MNC, 2);
-        attributes.put(Event.KEY_LAC, 4711);
-        attributes.put(Event.KEY_CID, 7989334);
+        attributes.put(Event.KEY_LAC, 10250);
+        attributes.put(Event.KEY_CID, 26511);
 
         locationProvider.getLocation(attributes, new LocationProvider.LocationProviderCallback() {
             @Override
-            public void onResult(double latitude, double longitude) {
+            public void onSuccess(double latitude, double longitude) {
                 Assert.assertEquals(60.07254, latitude, 0.00001);
                 Assert.assertEquals(30.30996, longitude, 0.00001);
             }
+
+            @Override
+            public void onFailure() {
+                Assert.fail();
+            }
         });
     }
 
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