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/*
* 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.protocol;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponse;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.jboss.netty.handler.codec.http.HttpVersion;
import org.jboss.netty.handler.codec.http.HttpHeaders;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.model.Position;
import javax.json.Json;
import javax.json.JsonArray;
import javax.json.JsonNumber;
import javax.json.JsonObject;
import java.io.StringReader;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.LinkedList;
import java.util.Date;
public class FlespiProtocolDecoder extends BaseProtocolDecoder {
private final String protocolName;
public FlespiProtocolDecoder(FlespiProtocol protocol) {
super(protocol);
protocolName = protocol.getName();
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
HttpRequest request = (HttpRequest) msg;
JsonArray result = Json.createReader(new StringReader(request.getContent().toString(StandardCharsets.UTF_8)))
.readArray();
List<Position> positions = new LinkedList<>();
for (int i = 0; i < result.size(); i++) {
JsonObject message = result.getJsonObject(i);
String ident = message.getString("ident");
if (ident == null) {
continue;
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, ident);
if (deviceSession == null) {
continue;
}
Position position = new Position();
position.setDeviceId(deviceSession.getDeviceId());
decodePosition(message, position);
positions.add(position);
}
sendResponse(channel, HttpResponseStatus.OK);
return positions;
}
private void sendResponse(Channel channel, HttpResponseStatus status) {
if (channel != null) {
HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, status);
response.headers().add(HttpHeaders.Names.CONTENT_LENGTH, 0);
channel.write(response);
}
}
private void decodePosition(JsonObject object, Position position) {
position.setProtocol(protocolName);
position.setTime(new Date((long) object.getJsonNumber("timestamp").doubleValue() * 1000));
JsonNumber lat = object.getJsonNumber("position.latitude");
JsonNumber lon = object.getJsonNumber("position.longitude");
position.setLatitude(lat != null ? lat.doubleValue() : 0);
position.setLongitude(lon != null ? lon.doubleValue() : 0);
JsonNumber speed = object.getJsonNumber("position.speed");
position.setSpeed(speed != null ? speed.doubleValue() : 0);
JsonNumber course = object.getJsonNumber("position.direction");
position.setCourse(course != null ? course.doubleValue() : 0);
JsonNumber altitude = object.getJsonNumber("position.altitude");
position.setAltitude(altitude != null ? altitude.doubleValue() : 0);
int satellites = object.getInt("position.satellites", 0);
position.setValid(object.getBoolean("position.valid", true));
position.set(Position.KEY_SATELLITES, satellites);
if (object.getBoolean("alarm.event.trigger", false)) {
position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
}
}
}
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