3 files changed, 70 insertions, 16 deletions
diff --git a/src/org/traccar/BasePipelineFactory.java b/src/org/traccar/BasePipelineFactory.java
index 33f778885..620c4729a 100644
--- a/src/org/traccar/BasePipelineFactory.java
+++ b/src/org/traccar/BasePipelineFactory.java
@@ -30,6 +30,7 @@ import org.jboss.netty.channel.SimpleChannelHandler;
 import org.jboss.netty.handler.logging.LoggingHandler;
 import org.jboss.netty.handler.timeout.IdleStateHandler;
 import org.traccar.events.CommandResultEventHandler;
+import org.traccar.events.FuelDropEventHandler;
 import org.traccar.events.GeofenceEventHandler;
 import org.traccar.events.IgnitionEventHandler;
 import org.traccar.events.MaintenanceEventHandler;
@@ -55,6 +56,7 @@ public abstract class BasePipelineFactory implements ChannelPipelineFactory {
 
     private CommandResultEventHandler commandResultEventHandler;
     private OverspeedEventHandler overspeedEventHandler;
+    private FuelDropEventHandler fuelDropEventHandler;
     private MotionEventHandler motionEventHandler;
     private GeofenceEventHandler geofenceEventHandler;
     private AlertEventHandler alertEventHandler;
@@ -153,25 +155,12 @@ public abstract class BasePipelineFactory implements ChannelPipelineFactory {
 
         if (Context.getConfig().getBoolean("event.enable")) {
             commandResultEventHandler = new CommandResultEventHandler();
-
-            if (Context.getConfig().getBoolean("event.overspeedHandler")) {
-                overspeedEventHandler = new OverspeedEventHandler();
-            }
-
-            if (Context.getConfig().getBoolean("event.motionHandler")) {
-                motionEventHandler = new MotionEventHandler();
-            }
-        }
-        if (Context.getConfig().getBoolean("event.geofenceHandler")) {
+            overspeedEventHandler = new OverspeedEventHandler();
+            fuelDropEventHandler = new FuelDropEventHandler();
+            motionEventHandler = new MotionEventHandler();
             geofenceEventHandler = new GeofenceEventHandler();
-        }
-        if (Context.getConfig().getBoolean("event.alertHandler")) {
             alertEventHandler = new AlertEventHandler();
-        }
-        if (Context.getConfig().getBoolean("event.ignitionHandler")) {
             ignitionEventHandler = new IgnitionEventHandler();
-        }
-        if (Context.getConfig().getBoolean("event.maintenanceHandler")) {
             maintenanceEventHandler = new MaintenanceEventHandler();
         }
     }
@@ -236,6 +225,10 @@ public abstract class BasePipelineFactory implements ChannelPipelineFactory {
             pipeline.addLast("OverspeedEventHandler", overspeedEventHandler);
         }
 
+        if (fuelDropEventHandler != null) {
+            pipeline.addLast("FuelDropEventHandler", fuelDropEventHandler);
+        }
+
         if (motionEventHandler != null) {
             pipeline.addLast("MotionEventHandler", motionEventHandler);
         }
diff --git a/src/org/traccar/events/FuelDropEventHandler.java b/src/org/traccar/events/FuelDropEventHandler.java
new file mode 100644
index 000000000..dfdbf7d7a
--- /dev/null
+++ b/src/org/traccar/events/FuelDropEventHandler.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.events;
+
+import org.traccar.BaseEventHandler;
+import org.traccar.Context;
+import org.traccar.model.Device;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+import java.util.Collection;
+import java.util.Collections;
+
+public class FuelDropEventHandler extends BaseEventHandler {
+
+    public static final String ATTRIBUTE_FUEL_DROP_THRESHOLD = "fuelDropThreshold";
+
+    @Override
+    protected Collection<Event> analyzePosition(Position position) {
+
+        Device device = Context.getIdentityManager().getDeviceById(position.getDeviceId());
+        if (device == null) {
+            return null;
+        }
+        if (!Context.getIdentityManager().isLatestPosition(position) || !position.getValid()) {
+            return null;
+        }
+
+        double fuelDropThreshold = Context.getDeviceManager()
+                .lookupAttributeDouble(device.getId(), ATTRIBUTE_FUEL_DROP_THRESHOLD, 0, false);
+
+        Position lastPosition = Context.getIdentityManager().getLastPosition(position.getDeviceId());
+        if (position.getAttributes().containsKey(Position.KEY_FUEL_LEVEL)
+                && lastPosition != null && lastPosition.getAttributes().containsKey(Position.KEY_FUEL_LEVEL)) {
+
+            double drop = lastPosition.getDouble(Position.KEY_FUEL_LEVEL) - position.getDouble(Position.KEY_FUEL_LEVEL);
+            if (drop >= fuelDropThreshold) {
+                Event event = new Event(Event.TYPE_DEVICE_FUEL_DROP, position.getDeviceId(), position.getId());
+                event.set(ATTRIBUTE_FUEL_DROP_THRESHOLD, fuelDropThreshold);
+                return Collections.singleton(event);
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/model/Event.java b/src/org/traccar/model/Event.java
index 96b371896..6a24d91c6 100644
--- a/src/org/traccar/model/Event.java
+++ b/src/org/traccar/model/Event.java
@@ -47,6 +47,7 @@ public class Event extends Message {
     public static final String TYPE_DEVICE_STOPPED = "deviceStopped";
 
     public static final String TYPE_DEVICE_OVERSPEED = "deviceOverspeed";
+    public static final String TYPE_DEVICE_FUEL_DROP = "deviceFuelDrop";
 
     public static final String TYPE_GEOFENCE_ENTER = "geofenceEnter";
     public static final String TYPE_GEOFENCE_EXIT = "geofenceExit";