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/*
* Copyright 2017 - 2022 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.handler.events;
import io.netty.channel.ChannelHandler;
import org.traccar.config.Keys;
import org.traccar.helper.model.AttributeUtil;
import org.traccar.helper.model.PositionUtil;
import org.traccar.model.Device;
import org.traccar.model.Event;
import org.traccar.model.Position;
import org.traccar.session.cache.CacheManager;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.Map;
@Singleton
@ChannelHandler.Sharable
public class FuelEventHandler extends BaseEventHandler {
private final CacheManager cacheManager;
@Inject
public FuelEventHandler(CacheManager cacheManager) {
this.cacheManager = cacheManager;
}
@Override
protected Map<Event, Position> analyzePosition(Position position) {
Device device = cacheManager.getObject(Device.class, position.getDeviceId());
if (device == null) {
return null;
}
if (!PositionUtil.isLatest(cacheManager, position)) {
return null;
}
if (position.hasAttribute(Position.KEY_FUEL_LEVEL)) {
Position lastPosition = cacheManager.getPosition(position.getDeviceId());
if (lastPosition != null && lastPosition.hasAttribute(Position.KEY_FUEL_LEVEL)) {
double before = lastPosition.getDouble(Position.KEY_FUEL_LEVEL);
double after = position.getDouble(Position.KEY_FUEL_LEVEL);
double change = after - before;
if (change > 0) {
double threshold = AttributeUtil.lookup(
cacheManager, Keys.EVENT_FUEL_INCREASE_THRESHOLD, position.getDeviceId());
if (change >= threshold) {
return Map.of(new Event(Event.TYPE_DEVICE_FUEL_INCREASE, position), position);
}
} else if (change < 0) {
double threshold = AttributeUtil.lookup(
cacheManager, Keys.EVENT_FUEL_DROP_THRESHOLD, position.getDeviceId());
if (Math.abs(change) >= threshold) {
return Map.of(new Event(Event.TYPE_DEVICE_FUEL_DROP, position), position);
}
}
}
}
return null;
}
}
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