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/*
* Copyright 2016 - 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 io.netty.channel.Channel;
import org.traccar.StringProtocolEncoder;
import org.traccar.helper.DataConverter;
import org.traccar.model.Command;
import java.nio.charset.StandardCharsets;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.TimeZone;
public class WatchProtocolEncoder extends StringProtocolEncoder implements StringProtocolEncoder.ValueFormatter {
@Override
public String formatValue(String key, Object value) {
if (key.equals(Command.KEY_TIMEZONE)) {
double offset = TimeZone.getTimeZone((String) value).getRawOffset() / 3600000.0;
DecimalFormat fmt = new DecimalFormat("+#.##;-#.##", DecimalFormatSymbols.getInstance(Locale.US));
return fmt.format(offset);
}
return null;
}
protected String formatCommand(Channel channel, Command command, String format, String... keys) {
boolean hasIndex = false;
String manufacturer = "CS";
if (channel != null) {
WatchProtocolDecoder decoder = channel.pipeline().get(WatchProtocolDecoder.class);
if (decoder != null) {
hasIndex = decoder.getHasIndex();
manufacturer = decoder.getManufacturer();
}
}
String content = formatCommand(command, format, this, keys);
if (hasIndex) {
return String.format("[%s*%s*0001*%04x*%s]",
manufacturer, getUniqueId(command.getDeviceId()), content.length(), content);
} else {
return String.format("[%s*%s*%04x*%s]",
manufacturer, getUniqueId(command.getDeviceId()), content.length(), content);
}
}
private int getEnableFlag(Command command) {
if (command.getBoolean(Command.KEY_ENABLE)) {
return 1;
} else {
return 0;
}
}
private static Map<Byte, Byte> mapping = new HashMap<>();
static {
mapping.put((byte) 0x7d, (byte) 0x01);
mapping.put((byte) 0x5B, (byte) 0x02);
mapping.put((byte) 0x5D, (byte) 0x03);
mapping.put((byte) 0x2C, (byte) 0x04);
mapping.put((byte) 0x2A, (byte) 0x05);
}
private String getBinaryData(Command command) {
byte[] data = DataConverter.parseHex(command.getString(Command.KEY_DATA));
int encodedLength = data.length;
for (byte b : data) {
if (mapping.containsKey(b)) {
encodedLength += 1;
}
}
int index = 0;
byte[] encodedData = new byte[encodedLength];
for (byte b : data) {
Byte replacement = mapping.get(b);
if (replacement != null) {
encodedData[index] = 0x7D;
index += 1;
encodedData[index] = replacement;
} else {
encodedData[index] = b;
}
index += 1;
}
return new String(encodedData, StandardCharsets.US_ASCII);
}
@Override
protected Object encodeCommand(Channel channel, Command command) {
switch (command.getType()) {
case Command.TYPE_CUSTOM:
return formatCommand(channel, command, command.getString(Command.KEY_DATA));
case Command.TYPE_POSITION_SINGLE:
return formatCommand(channel, command, "RG");
case Command.TYPE_SOS_NUMBER:
return formatCommand(channel, command, "SOS{%s},{%s}", Command.KEY_INDEX, Command.KEY_PHONE);
case Command.TYPE_ALARM_SOS:
return formatCommand(channel, command, "SOSSMS," + getEnableFlag(command));
case Command.TYPE_ALARM_BATTERY:
return formatCommand(channel, command, "LOWBAT," + getEnableFlag(command));
case Command.TYPE_REBOOT_DEVICE:
return formatCommand(channel, command, "RESET");
case Command.TYPE_ALARM_REMOVE:
return formatCommand(channel, command, "REMOVE," + getEnableFlag(command));
case Command.TYPE_SILENCE_TIME:
return formatCommand(channel, command, "SILENCETIME,{%s}", Command.KEY_DATA);
case Command.TYPE_ALARM_CLOCK:
return formatCommand(channel, command, "REMIND,{%s}", Command.KEY_DATA);
case Command.TYPE_SET_PHONEBOOK:
return formatCommand(channel, command, "PHB,{%s}", Command.KEY_DATA);
case Command.TYPE_VOICE_MESSAGE:
return formatCommand(channel, command, "TK,{%s}", getBinaryData(command));
case Command.TYPE_POSITION_PERIODIC:
return formatCommand(channel, command, "UPLOAD,{%s}", Command.KEY_FREQUENCY);
case Command.TYPE_SET_TIMEZONE:
return formatCommand(channel, command, "LZ,,{%s}", Command.KEY_TIMEZONE);
case Command.TYPE_SET_INDICATOR:
return formatCommand(channel, command, "FLOWER,{%s}", Command.KEY_DATA);
default:
return null;
}
}
}
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