1 files changed, 59 insertions, 0 deletions
diff --git a/src/org/traccar/DistanceHandler.java b/src/org/traccar/DistanceHandler.java
new file mode 100644
index 000000000..57dddfe87
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+++ b/src/org/traccar/DistanceHandler.java
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+/*
+ * Copyright 2015 Amila Silva
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar;
+
+import org.traccar.helper.DistanceCalculator;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+import java.math.BigDecimal;
+
+public class DistanceHandler extends BaseDataHandler {
+
+    private Position getLastPosition(long deviceId) {
+        if (Context.getConnectionManager() != null) {
+            return Context.getConnectionManager().getLastPosition(deviceId);
+        }
+        return null;
+    }
+
+    public Position calculateDistance(Position position) {
+
+        double distance = 0.0;
+
+        Position last = getLastPosition(position.getDeviceId());
+        if (last != null) {
+            if (last.getOther().containsKey(Event.KEY_DISTANCE)) {
+                distance = ((Number) last.getOther().get(Event.KEY_DISTANCE)).doubleValue();
+            }
+
+            distance += DistanceCalculator.distance(
+                    position.getLatitude(), position.getLongitude(),
+                    last.getLatitude(), last.getLongitude());
+
+            distance = BigDecimal.valueOf(distance).setScale(2).doubleValue();
+        }
+
+        position.set(Event.KEY_DISTANCE, distance);
+        return position;
+    }
+
+    @Override
+    protected Position handlePosition(Position position) {
+        return calculateDistance(position);
+    }
+
+}