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/*
* Copyright 2016 - 2019 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.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import org.traccar.StringProtocolEncoder;
import org.traccar.helper.DataConverter;
import org.traccar.model.Command;
import org.traccar.Protocol;
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 {
public WatchProtocolEncoder(Protocol protocol) {
super(protocol);
}
@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);
} else if (key.equals(Command.KEY_MESSAGE)) {
return DataConverter.printHex(value.toString().getBytes(StandardCharsets.UTF_16BE));
} else if (key.equals(Command.KEY_ENABLE)) {
return (boolean) value ? "1" : "0";
}
return null;
}
protected ByteBuf formatTextCommand(Channel channel, Command command, String format, String... keys) {
String content = formatCommand(command, format, this, keys);
ByteBuf buf = Unpooled.copiedBuffer(content, StandardCharsets.US_ASCII);
return formatBinaryCommand(channel, command, "", buf);
}
protected ByteBuf formatBinaryCommand(Channel channel, Command command, String textPrefix, ByteBuf data) {
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();
}
}
ByteBuf buf = Unpooled.buffer();
buf.writeByte('[');
buf.writeCharSequence(manufacturer, StandardCharsets.US_ASCII);
buf.writeByte('*');
buf.writeCharSequence(getUniqueId(command.getDeviceId()), StandardCharsets.US_ASCII);
buf.writeByte('*');
if (hasIndex) {
buf.writeCharSequence("0001", StandardCharsets.US_ASCII);
buf.writeByte('*');
}
buf.writeCharSequence(String.format("%04x", data.readableBytes() + textPrefix.length()),
StandardCharsets.US_ASCII);
buf.writeByte('*');
buf.writeCharSequence(textPrefix, StandardCharsets.US_ASCII);
buf.writeBytes(data);
buf.writeByte(']');
return buf;
}
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 ByteBuf 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 Unpooled.copiedBuffer(encodedData);
}
@Override
protected Object encodeCommand(Channel channel, Command command) {
switch (command.getType()) {
case Command.TYPE_CUSTOM:
return formatTextCommand(channel, command, command.getString(Command.KEY_DATA));
case Command.TYPE_POSITION_SINGLE:
return formatTextCommand(channel, command, "CR");
case Command.TYPE_SOS_NUMBER:
return formatTextCommand(channel, command, "SOS%s,%s", Command.KEY_INDEX, Command.KEY_PHONE);
case Command.TYPE_ALARM_SOS:
return formatTextCommand(channel, command, "SOSSMS,%s", Command.KEY_ENABLE);
case Command.TYPE_ALARM_BATTERY:
return formatTextCommand(channel, command, "LOWBAT,%s", Command.KEY_ENABLE);
case Command.TYPE_REBOOT_DEVICE:
return formatTextCommand(channel, command, "RESET");
case Command.TYPE_POWER_OFF:
return formatTextCommand(channel, command, "POWEROFF");
case Command.TYPE_ALARM_REMOVE:
return formatTextCommand(channel, command, "REMOVE,%s", Command.KEY_ENABLE);
case Command.TYPE_SILENCE_TIME:
return formatTextCommand(channel, command, "SILENCETIME,%s", Command.KEY_DATA);
case Command.TYPE_ALARM_CLOCK:
return formatTextCommand(channel, command, "REMIND,%s", Command.KEY_DATA);
case Command.TYPE_SET_PHONEBOOK:
return formatTextCommand(channel, command, "PHB,%s", Command.KEY_DATA);
case Command.TYPE_MESSAGE:
return formatTextCommand(channel, command, "MESSAGE,%s", Command.KEY_MESSAGE);
case Command.TYPE_VOICE_MESSAGE:
return formatBinaryCommand(channel, command, "TK,", getBinaryData(command));
case Command.TYPE_POSITION_PERIODIC:
return formatTextCommand(channel, command, "UPLOAD,%s", Command.KEY_FREQUENCY);
case Command.TYPE_SET_TIMEZONE:
return formatTextCommand(channel, command, "LZ,%s,%s", Command.KEY_LANGUAGE, Command.KEY_TIMEZONE);
case Command.TYPE_SET_INDICATOR:
return formatTextCommand(channel, command, "FLOWER,%s", Command.KEY_DATA);
default:
return null;
}
}
}
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