Swiften/StreamStack/CompressionLayer.h


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/*
 * Copyright (c) 2010 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#pragma once

#include <boost/noncopyable.hpp>
#include <Swiften/Base/boost_bsignals.h>

#include <Swiften/Base/SafeByteArray.h>
#include <Swiften/StreamStack/StreamLayer.h>
#include <Swiften/Compress/ZLibException.h>
#include <Swiften/Compress/ZLibCompressor.h>
#include <Swiften/Compress/ZLibDecompressor.h>

namespace Swift {
	class ZLibCompressor;
	class ZLibDecompressor;

	class CompressionLayer : public StreamLayer, boost::noncopyable {
		public:
			CompressionLayer() {}

			virtual void writeData(const SafeByteArray& data) {
				try {
					writeDataToChildLayer(compressor_.process(data));
				}
				catch (const ZLibException&) {
					onError();
				}
			}

			virtual void handleDataRead(const SafeByteArray& data) {
				try {
					writeDataToParentLayer(decompressor_.process(data));
				}
				catch (const ZLibException&) {
					onError();
				}
			}

		public:
			boost::signal<void ()> onError;

		private:
			ZLibCompressor compressor_;
			ZLibDecompressor decompressor_;
	};
}