/* * Copyright 2015 - 2018 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.traccar.StringProtocolEncoder; import org.traccar.helper.Checksum; import org.traccar.helper.Log; import org.traccar.model.Command; import java.util.Map; public class MeitrackProtocolEncoder extends StringProtocolEncoder { private Object formatCommand(Command command, char dataId, String content) { String uniqueId = getUniqueId(command.getDeviceId()); int length = 1 + uniqueId.length() + 1 + content.length() + 5; String result = String.format("@@%c%02d,%s,%s*", dataId, length, uniqueId, content); result += Checksum.sum(result) + "\r\n"; return result; } @Override protected Object encodeCommand(Command command) { Map<String, Object> attributes = command.getAttributes(); switch (command.getType()) { case Command.TYPE_POSITION_SINGLE: return formatCommand(command, 'Q', "A10"); case Command.TYPE_ENGINE_STOP: return formatCommand(command, 'M', "C01,0,12222"); case Command.TYPE_ENGINE_RESUME: return formatCommand(command, 'M', "C01,0,02222"); case Command.TYPE_ALARM_ARM: return formatCommand(command, 'M', "C01,0,22122"); case Command.TYPE_ALARM_DISARM: return formatCommand(command, 'M', "C01,0,22022"); case Command.TYPE_REQUEST_PHOTO: int index = command.getInteger(Command.KEY_INDEX); return formatCommand(command, 'D', "D03," + (index > 0 ? index : 1) + ",camera_picture.jpg"); case Command.TYPE_SEND_SMS: return formatCommand(command, 'f', "C02,0," + attributes.get(Command.KEY_PHONE) + "," + attributes.get(Command.KEY_MESSAGE)); default: Log.warning(new UnsupportedOperationException(command.getType())); break; } return null; } }