[cros] user_manager component - move UserManagerBase and UserManager

chrome/browser/chromeos/login/users/user_manager.h

-// 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 CHROME_BROWSER_CHROMEOS_LOGIN_USERS_USER_MANAGER_H_
-#define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_USER_MANAGER_H_
-
-#include <string>
-
-#include "chrome/browser/chromeos/login/user_flow.h"
-#include "components/user_manager/user.h"
-
-class PrefRegistrySimple;
-
-namespace chromeos {
-
-class MultiProfileUserController;
-class RemoveUserDelegate;
-class UserImageManager;
-class SupervisedUserManager;
-
-// Interface for UserManagerBase - provides a mechanism for discovering users
-// who have logged into this Chrome OS device before and updating that list.
-class UserManager {
- public:
-  // Interface that observers of UserManager must implement in order
-  // to receive notification when local state preferences is changed
-  class Observer {
-   public:
-    // Called when the local state preferences is changed.
-    virtual void LocalStateChanged(UserManager* user_manager);
-
-   protected:
-    virtual ~Observer();
-  };
-
-  // TODO(nkostylev): Refactor and move this observer out of UserManager.
-  // Observer interface that defines methods used to notify on user session /
-  // active user state changes. Default implementation is empty.
-  class UserSessionStateObserver {
-   public:
-    // Called when active user has changed.
-    virtual void ActiveUserChanged(const user_manager::User* active_user);
-
-    // Called when another user got added to the existing session.
-    virtual void UserAddedToSession(const user_manager::User* added_user);
-
-    // Called right before notifying on user change so that those who rely
-    // on user_id hash would be accessing up-to-date value.
-    virtual void ActiveUserHashChanged(const std::string& hash);
-
-   protected:
-    virtual ~UserSessionStateObserver();
-  };
-
-  // Data retrieved from user account.
-  class UserAccountData {
-   public:
-    UserAccountData(const base::string16& display_name,
-                    const base::string16& given_name,
-                    const std::string& locale);
-    ~UserAccountData();
-    const base::string16& display_name() const { return display_name_; }
-    const base::string16& given_name() const { return given_name_; }
-    const std::string& locale() const { return locale_; }
-
-   private:
-    const base::string16 display_name_;
-    const base::string16 given_name_;
-    const std::string locale_;
-
-    DISALLOW_COPY_AND_ASSIGN(UserAccountData);
-  };
-
-  // Creates the singleton instance. This method is not thread-safe and must be
-  // called from the main UI thread.
-  static void Initialize();
-
-  // Checks whether the singleton instance has been created already. This method
-  // is not thread-safe and must be called from the main UI thread.
-  static bool IsInitialized();
-
-  // Shuts down the UserManager. After this method has been called, the
-  // singleton has unregistered itself as an observer but remains available so
-  // that other classes can access it during their shutdown. This method is not
-  // thread-safe and must be called from the main UI thread.
-  virtual void Shutdown() = 0;
-
-  // Destroys the singleton instance. Always call Shutdown() first. This method
-  // is not thread-safe and must be called from the main UI thread.
-  static void Destroy();
-
-  // Returns the singleton instance or |NULL| if the singleton has either not
-  // been created yet or is already destroyed. This method is not thread-safe
-  // and must be called from the main UI thread.
-  static UserManager* Get();
-
-  // Registers user manager preferences.
-  static void RegisterPrefs(PrefRegistrySimple* registry);
-
-  virtual ~UserManager();
-
-  virtual MultiProfileUserController* GetMultiProfileUserController() = 0;
-  virtual UserImageManager* GetUserImageManager(const std::string& user_id) = 0;
-  virtual SupervisedUserManager* GetSupervisedUserManager() = 0;
-
-  // Returns a list of users who have logged into this device previously. This
-  // is sorted by last login date with the most recent user at the beginning.
-  virtual const user_manager::UserList& GetUsers() const = 0;
-
-  // Returns list of users admitted for logging in into multi-profile session.
-  // Users that have a policy that prevents them from being added to the
-  // multi-profile session will still be part of this list as long as they
-  // are regular users (i.e. not a public session/supervised etc.).
-  // Returns an empty list in case when primary user is not a regular one or
-  // has a policy that prohibids it to be part of multi-profile session.
-  virtual user_manager::UserList GetUsersAdmittedForMultiProfile() const = 0;
-
-  // Returns a list of users who are currently logged in.
-  virtual const user_manager::UserList& GetLoggedInUsers() const = 0;
-
-  // Returns a list of users who are currently logged in in the LRU order -
-  // so the active user is the first one in the list. If there is no user logged
-  // in, the current user will be returned.
-  virtual const user_manager::UserList& GetLRULoggedInUsers() const = 0;
-
-  // Returns a list of users who can unlock the device.
-  // This list is based on policy and whether user is able to do unlock.
-  // Policy:
-  // * If user has primary-only policy then it is the only user in unlock users.
-  // * Otherwise all users with unrestricted policy are added to this list.
-  // All users that are unable to perform unlock are excluded from this list.
-  virtual user_manager::UserList GetUnlockUsers() const = 0;
-
-  // Returns the email of the owner user. Returns an empty string if there is
-  // no owner for the device.
-  virtual const std::string& GetOwnerEmail() const = 0;
-
-  // Indicates that a user with the given |user_id| has just logged in. The
-  // persistent list is updated accordingly if the user is not ephemeral.
-  // |browser_restart| is true when reloading Chrome after crash to distinguish
-  // from normal sign in flow.
-  // |username_hash| is used to identify homedir mount point.
-  virtual void UserLoggedIn(const std::string& user_id,
-                            const std::string& username_hash,
-                            bool browser_restart) = 0;
-
-  // Switches to active user identified by |user_id|. User has to be logged in.
-  virtual void SwitchActiveUser(const std::string& user_id) = 0;
-
-  // Called when browser session is started i.e. after
-  // browser_creator.LaunchBrowser(...) was called after user sign in.
-  // When user is at the image screen IsUserLoggedIn() will return true
-  // but IsSessionStarted() will return false. During the kiosk splash screen,
-  // we perform additional initialization after the user is logged in but
-  // before the session has been started.
-  // Fires NOTIFICATION_SESSION_STARTED.
-  virtual void SessionStarted() = 0;
-
-  // Removes the user from the device. Note, it will verify that the given user
-  // isn't the owner, so calling this method for the owner will take no effect.
-  // Note, |delegate| can be NULL.
-  virtual void RemoveUser(const std::string& user_id,
-                          RemoveUserDelegate* delegate) = 0;
-
-  // Removes the user from the persistent list only. Also removes the user's
-  // picture.
-  virtual void RemoveUserFromList(const std::string& user_id) = 0;
-
-  // Returns true if a user with the given user id is found in the persistent
-  // list or currently logged in as ephemeral.
-  virtual bool IsKnownUser(const std::string& user_id) const = 0;
-
-  // Returns the user with the given user id if found in the persistent
-  // list or currently logged in as ephemeral. Returns |NULL| otherwise.
-  virtual const user_manager::User* FindUser(
-      const std::string& user_id) const = 0;
-
-  // Returns the user with the given user id if found in the persistent
-  // list or currently logged in as ephemeral. Returns |NULL| otherwise.
-  // Same as FindUser but returns non-const pointer to User object.
-  virtual user_manager::User* FindUserAndModify(const std::string& user_id) = 0;
-
-  // Returns the logged-in user.
-  // TODO(nkostylev): Deprecate this call, move clients to GetActiveUser().
-  // http://crbug.com/230852
-  virtual const user_manager::User* GetLoggedInUser() const = 0;
-  virtual user_manager::User* GetLoggedInUser() = 0;
-
-  // Returns the logged-in user that is currently active within this session.
-  // There could be multiple users logged in at the the same but for now
-  // we support only one of them being active.
-  virtual const user_manager::User* GetActiveUser() const = 0;
-  virtual user_manager::User* GetActiveUser() = 0;
-
-  // Returns the primary user of the current session. It is recorded for the
-  // first signed-in user and does not change thereafter.
-  virtual const user_manager::User* GetPrimaryUser() const = 0;
-
-  // Saves user's oauth token status in local state preferences.
-  virtual void SaveUserOAuthStatus(
-      const std::string& user_id,
-      user_manager::User::OAuthTokenStatus oauth_token_status) = 0;
-
-  // Saves a flag indicating whether online authentication against GAIA should
-  // be enforced during the user's next sign-in.
-  virtual void SaveForceOnlineSignin(const std::string& user_id,
-                                     bool force_online_signin) = 0;
-
-  // Saves user's displayed name in local state preferences.
-  // Ignored If there is no such user.
-  virtual void SaveUserDisplayName(const std::string& user_id,
-                                   const base::string16& display_name) = 0;
-
-  // Updates data upon User Account download.
-  virtual void UpdateUserAccountData(const std::string& user_id,
-                                     const UserAccountData& account_data) = 0;
-
-  // Returns the display name for user |user_id| if it is known (was
-  // previously set by a |SaveUserDisplayName| call).
-  // Otherwise, returns an empty string.
-  virtual base::string16 GetUserDisplayName(
-      const std::string& user_id) const = 0;
-
-  // Saves user's displayed (non-canonical) email in local state preferences.
-  // Ignored If there is no such user.
-  virtual void SaveUserDisplayEmail(const std::string& user_id,
-                                    const std::string& display_email) = 0;
-
-  // Returns the display email for user |user_id| if it is known (was
-  // previously set by a |SaveUserDisplayEmail| call).
-  // Otherwise, returns |user_id| itself.
-  virtual std::string GetUserDisplayEmail(
-      const std::string& user_id) const = 0;
-
-  // Returns true if current user is an owner.
-  virtual bool IsCurrentUserOwner() const = 0;
-
-  // Returns true if current user is not existing one (hasn't signed in before).
-  virtual bool IsCurrentUserNew() const = 0;
-
-  // Returns true if data stored or cached for the current user outside that
-  // user's cryptohome (wallpaper, avatar, OAuth token status, display name,
-  // display email) is ephemeral.
-  virtual bool IsCurrentUserNonCryptohomeDataEphemeral() const = 0;
-
-  // Returns true if the current user's session can be locked (i.e. the user has
-  // a password with which to unlock the session).
-  virtual bool CanCurrentUserLock() const = 0;
-
-  // Returns true if at least one user has signed in.
-  virtual bool IsUserLoggedIn() const = 0;
-
-  // Returns true if we're logged in as a regular user.
-  virtual bool IsLoggedInAsRegularUser() const = 0;
-
-  // Returns true if we're logged in as a demo user.
-  virtual bool IsLoggedInAsDemoUser() const = 0;
-
-  // Returns true if we're logged in as a public account.
-  virtual bool IsLoggedInAsPublicAccount() const = 0;
-
-  // Returns true if we're logged in as a Guest.
-  virtual bool IsLoggedInAsGuest() const = 0;
-
-  // Returns true if we're logged in as a supervised user.
-  virtual bool IsLoggedInAsSupervisedUser() const = 0;
-
-  // Returns true if we're logged in as a kiosk app.
-  virtual bool IsLoggedInAsKioskApp() const = 0;
-
-  // Returns true if we're logged in as the stub user used for testing on Linux.
-  virtual bool IsLoggedInAsStub() const = 0;
-
-  // Returns true if we're logged in and browser has been started i.e.
-  // browser_creator.LaunchBrowser(...) was called after sign in
-  // or restart after crash.
-  virtual bool IsSessionStarted() const = 0;
-
-  // Returns true if data stored or cached for the user with the given user id
-  // address outside that user's cryptohome (wallpaper, avatar, OAuth token
-  // status, display name, display email) is to be treated as ephemeral.
-  virtual bool IsUserNonCryptohomeDataEphemeral(
-      const std::string& user_id) const = 0;
-
-  // Method that allows to set |flow| for user identified by |user_id|.
-  // Flow should be set before login attempt.
-  // Takes ownership of the |flow|, |flow| will be deleted in case of login
-  // failure.
-  virtual void SetUserFlow(const std::string& user_id, UserFlow* flow) = 0;
-
-  // Return user flow for current user. Returns instance of DefaultUserFlow if
-  // no flow was defined for current user, or user is not logged in.
-  // Returned value should not be cached.
-  virtual UserFlow* GetCurrentUserFlow() const = 0;
-
-  // Return user flow for user identified by |user_id|. Returns instance of
-  // DefaultUserFlow if no flow was defined for user.
-  // Returned value should not be cached.
-  virtual UserFlow* GetUserFlow(const std::string& user_id) const = 0;
-
-  // Resets user flow for user identified by |user_id|.
-  virtual void ResetUserFlow(const std::string& user_id) = 0;
-
-  virtual void AddObserver(Observer* obs) = 0;
-  virtual void RemoveObserver(Observer* obs) = 0;
-
-  virtual void AddSessionStateObserver(UserSessionStateObserver* obs) = 0;
-  virtual void RemoveSessionStateObserver(UserSessionStateObserver* obs) = 0;
-
-  virtual void NotifyLocalStateChanged() = 0;
-
-  // Returns true if supervised users allowed.
-  virtual bool AreSupervisedUsersAllowed() const = 0;
-
- private:
-  friend class ScopedUserManagerEnabler;
-
-  // Sets the singleton to the given |user_manager|, taking ownership. Returns
-  // the previous value of the singleton, passing ownership.
-  static UserManager* SetForTesting(UserManager* user_manager);
-};
-
-// Helper class for unit tests. Initializes the UserManager singleton to the
-// given |user_manager| and tears it down again on destruction. If the singleton
-// had already been initialized, its previous value is restored after tearing
-// down |user_manager|.
-class ScopedUserManagerEnabler {
- public:
-  // Takes ownership of |user_manager|.
-  explicit ScopedUserManagerEnabler(UserManager* user_manager);
-  ~ScopedUserManagerEnabler();
-
- private:
-  UserManager* previous_user_manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedUserManagerEnabler);
-};
-
-// Helper class for unit tests. Initializes the UserManager singleton on
-// construction and tears it down again on destruction.
-class ScopedTestUserManager {
- public:
-  ScopedTestUserManager();
-  ~ScopedTestUserManager();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScopedTestUserManager);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_USER_MANAGER_H_