// Copyright 2015 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 BLIMP_NET_PACKET_READER_H_
#define BLIMP_NET_PACKET_READER_H_

#include "blimp/net/blimp_net_export.h"
#include "net/base/completion_callback.h"
#include "net/base/io_buffer.h"

namespace blimp {

// Interface to describe a reader which can read variable-length data packets
// from a connection.
class BLIMP_NET_EXPORT PacketReader {
 public:
  virtual ~PacketReader() {}

  // Reads a packet from the connection.
  // Passes net::OK to |cb| if the read operation executed successfully.
  // Sets |buf.offset()| to the received message's size, and invokes |cb| with
  // net::OK result on success.
  // All other values indicate errors.
  // |callback| will not be invoked if |this| is deleted.
  virtual void ReadPacket(const scoped_refptr<net::GrowableIOBuffer>& buf,
                          const net::CompletionCallback& cb) = 0;
};

}  // namespace blimp

#endif  // BLIMP_NET_PACKET_READER_H_