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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_PAIRING_PROTO_DECODER_H_
#define COMPONENTS_PAIRING_PROTO_DECODER_H_
#include <deque>
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "components/pairing/message_buffer.h"
namespace net {
class IOBuffer;
}
namespace pairing_api {
class CompleteSetup;
class ConfigureHost;
class Error;
class HostStatus;
class PairDevices;
} // namespace pairing_api
namespace pairing_chromeos {
// A ProtoDecoder collects data from a series of IOBuffers and decodes Proto
// buffers from the data. The decoded messages are then forwarded to an
// observer.
class ProtoDecoder {
public:
typedef scoped_refptr<net::IOBuffer> IOBufferRefPtr;
class Observer {
public:
virtual ~Observer() {}
virtual void OnHostStatusMessage(
const pairing_api::HostStatus& message) = 0;
virtual void OnConfigureHostMessage(
const pairing_api::ConfigureHost& message) = 0;
virtual void OnPairDevicesMessage(
const pairing_api::PairDevices& message) = 0;
virtual void OnCompleteSetupMessage(
const pairing_api::CompleteSetup& message) = 0;
virtual void OnErrorMessage(
const pairing_api::Error& message) = 0;
protected:
Observer() {}
private:
DISALLOW_COPY_AND_ASSIGN(Observer);
};
explicit ProtoDecoder(Observer* observer);
~ProtoDecoder();
// Decodes the data from an io_buffer, and sends out events for any complete
// messages.
bool DecodeIOBuffer(int size, IOBufferRefPtr io_buffer);
// Convenience functions for serializing messages into an IOBuffer.
static IOBufferRefPtr SendHostStatus(const pairing_api::HostStatus& message,
int* size);
static IOBufferRefPtr SendConfigureHost(
const pairing_api::ConfigureHost& message, int* size);
static IOBufferRefPtr SendPairDevices(const pairing_api::PairDevices& message,
int* size);
static IOBufferRefPtr SendCompleteSetup(
const pairing_api::CompleteSetup& message, int* size);
static IOBufferRefPtr SendError(const pairing_api::Error& message, int* size);
private:
static IOBufferRefPtr SendMessage(uint8_t message_type,
const std::string& message,
int* size);
Observer* observer_;
MessageBuffer message_buffer_;
int next_message_type_;
int next_message_size_;
DISALLOW_COPY_AND_ASSIGN(ProtoDecoder);
};
} // namespace pairing_chromeos
#endif // COMPONENTS_PAIRING_PROTO_DECODER_H_
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