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// Copyright (c) 2012 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_SYNC_DRIVER_DEVICE_INFO_H_
#define COMPONENTS_SYNC_DRIVER_DEVICE_INFO_H_

#include <string>

#include "base/basictypes.h"
#include "base/callback.h"
#include "sync/protocol/sync.pb.h"

namespace base {
class DictionaryValue;
}

namespace sync_driver {

// A class that holds information regarding the properties of a device.
class DeviceInfo {
 public:
  DeviceInfo(const std::string& guid,
             const std::string& client_name,
             const std::string& chrome_version,
             const std::string& sync_user_agent,
             const sync_pb::SyncEnums::DeviceType device_type,
             const std::string& signin_scoped_device_id);
  ~DeviceInfo();

  // Sync specific unique identifier for the device. Note if a device
  // is wiped and sync is set up again this id WILL be different.
  // The same device might have more than 1 guid if the device has multiple
  // accounts syncing.
  const std::string& guid() const;

  // The host name for the client.
  const std::string& client_name() const;

  // Chrome version string.
  const std::string& chrome_version() const;

  // The user agent is the combination of OS type, chrome version and which
  // channel of chrome(stable or beta). For more information see
  // |LocalDeviceInfoProviderImpl::MakeUserAgentForSyncApi|.
  const std::string& sync_user_agent() const;

  // Third party visible id for the device. See |public_id_| for more details.
  const std::string& public_id() const;

  // Device Type.
  sync_pb::SyncEnums::DeviceType device_type() const;

  // Device_id that is stable until user signs out. This device_id is used for
  // annotating login scoped refresh token.
  const std::string& signin_scoped_device_id() const;

  // Gets the OS in string form.
  std::string GetOSString() const;

  // Gets the device type in string form.
  std::string GetDeviceTypeString() const;

  // Compares this object's fields with another's.
  bool Equals(const DeviceInfo& other) const;

  // Apps can set ids for a device that is meaningful to them but
  // not unique enough so the user can be tracked. Exposing |guid|
  // would lead to a stable unique id for a device which can potentially
  // be used for tracking.
  void set_public_id(std::string id);

  // Converts the |DeviceInfo| values to a JS friendly DictionaryValue,
  // which extension APIs can expose to third party apps.
  base::DictionaryValue* ToValue();

 private:
  const std::string guid_;

  const std::string client_name_;

  const std::string chrome_version_;

  const std::string sync_user_agent_;

  const sync_pb::SyncEnums::DeviceType device_type_;

  std::string signin_scoped_device_id_;

  // Exposing |guid| would lead to a stable unique id for a device which
  // can potentially be used for tracking. Public ids are privacy safe
  // ids in that the same device will have different id for different apps
  // and they are also reset when app/extension is uninstalled.
  std::string public_id_;

  DISALLOW_COPY_AND_ASSIGN(DeviceInfo);
};

}  // namespace sync_driver

#endif  // COMPONENTS_SYNC_DRIVER_DEVICE_INFO_H_