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/*
* Copyright 2021 - 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.protocol;
import com.google.inject.Inject;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageEncoder;
import org.traccar.Protocol;
import org.traccar.config.Config;
import org.traccar.config.Keys;
import java.util.List;
@ChannelHandler.Sharable
public class TaipPrefixEncoder extends MessageToMessageEncoder<ByteBuf> {
private final Protocol protocol;
private Config config;
public TaipPrefixEncoder(Protocol protocol) {
this.protocol = protocol;
}
@Inject
public void setConfig(Config config) {
this.config = config;
}
@Override
protected void encode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) {
if (config.getBoolean(Keys.PROTOCOL_PREFIX.withPrefix(protocol.getName()))) {
out.add(Unpooled.wrappedBuffer(Unpooled.wrappedBuffer(new byte[] {0x20, 0x20, 0x06, 0x00}), msg.retain()));
} else {
out.add(msg.retain());
}
}
}
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