// Copyright 2013 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 CHROME_BROWSER_CHROMEOS_LOGIN_SUPERVISED_USER_MANAGER_H_
#define CHROME_BROWSER_CHROMEOS_LOGIN_SUPERVISED_USER_MANAGER_H_

#include <string>

#include "base/basictypes.h"
#include "base/strings/string16.h"

class PrefRegistrySimple;

namespace chromeos {

class User;

// Base class for SupervisedUserManagerImpl - provides a mechanism for getting
// and setting specific values for supervised users, as well as additional
// lookup methods that make sense only for supervised users.
class SupervisedUserManager {
 public:
  // Registers user manager preferences.
  static void RegisterPrefs(PrefRegistrySimple* registry);

  SupervisedUserManager() {}
  virtual ~SupervisedUserManager() {}

  // Creates supervised user with given |display_name| and |local_user_id|
  // and persists that to user list. Also links this user identified by
  // |sync_user_id| to manager with a |manager_id|.
  // Returns created user, or existing user if there already
  // was locally managed user with such display name.
  // TODO(antrim): Refactor into a single struct to have only 1 getter.
  virtual const User* CreateUserRecord(
      const std::string& manager_id,
      const std::string& local_user_id,
      const std::string& sync_user_id,
      const base::string16& display_name) = 0;

  // Generates unique user ID for supervised user.
  virtual std::string GenerateUserId() = 0;

  // Returns the supervised user with the given |display_name| if found in
  // the persistent list. Returns |NULL| otherwise.
  virtual const User* FindByDisplayName(
      const base::string16& display_name) const = 0;

  // Returns the supervised user with the given |sync_id| if found in
  // the persistent list. Returns |NULL| otherwise.
  virtual const User* FindBySyncId(const std::string& sync_id) const = 0;

  // Returns sync_user_id for supervised user with |user_id| or empty string if
  // such user is not found or it doesn't have user_id defined.
  virtual std::string GetUserSyncId(const std::string& user_id) const = 0;

  // Returns the display name for manager of user |user_id| if it is known
  // (was previously set by a |SaveUserDisplayName| call).
  // Otherwise, returns a manager id.
  virtual base::string16 GetManagerDisplayName(
      const std::string& user_id) const = 0;

  // Returns the user id for manager of user |user_id| if it is known (user is
  // actually a managed user).
  // Otherwise, returns an empty string.
  virtual std::string GetManagerUserId(const std::string& user_id) const = 0;

  // Returns the display email for manager of user |user_id| if it is known
  // (user is actually a managed user).
  // Otherwise, returns an empty string.
  virtual std::string GetManagerDisplayEmail(const std::string& user_id)
      const = 0;

  // Create a record about starting supervised user creation transaction.
  virtual void StartCreationTransaction(const base::string16& display_name) = 0;

  // Add user id to supervised user creation transaction record.
  virtual void SetCreationTransactionUserId(const std::string& user_id) = 0;

  // Remove locally managed user creation transaction record.
  virtual void CommitCreationTransaction() = 0;

 private:
  DISALLOW_COPY_AND_ASSIGN(SupervisedUserManager);
};

}  // namespace chromeos

#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SUPERVISED_USER_MANAGER_H_