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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.
#include <map>
#include <set>
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/synchronization/lock.h"
#include "base/time/time.h"
#include "components/user_manager/user.h"
#include "components/user_manager/user_id.h"
#include "components/user_manager/user_manager.h"
#include "components/user_manager/user_manager_export.h"
#include "components/user_manager/user_type.h"
class PrefService;
class PrefRegistrySimple;
namespace base {
class DictionaryValue;
class ListValue;
class TaskRunner;
namespace user_manager {
class RemoveUserDelegate;
// Base implementation of the UserManager interface.
class USER_MANAGER_EXPORT UserManagerBase : public UserManager {
// Creates UserManagerBase with |task_runner| for UI thread and
// |blocking_task_runner| for SequencedWorkerPool.
UserManagerBase(scoped_refptr<base::TaskRunner> task_runner,
scoped_refptr<base::TaskRunner> blocking_task_runner);
~UserManagerBase() override;
// Registers UserManagerBase preferences.
static void RegisterPrefs(PrefRegistrySimple* registry);
// UserManager implementation:
void Shutdown() override;
const UserList& GetUsers() const override;
const UserList& GetLoggedInUsers() const override;
const UserList& GetLRULoggedInUsers() const override;
const std::string& GetOwnerEmail() const override;
void UserLoggedIn(const std::string& user_id,
const std::string& user_id_hash,
bool browser_restart) override;
void SwitchActiveUser(const std::string& user_id) override;
void SwitchToLastActiveUser() override;
void SessionStarted() override;
void RemoveUser(const std::string& user_id,
RemoveUserDelegate* delegate) override;
void RemoveUserFromList(const std::string& user_id) override;
bool IsKnownUser(const std::string& user_id) const override;
const User* FindUser(const std::string& user_id) const override;
User* FindUserAndModify(const std::string& user_id) override;
const User* GetLoggedInUser() const override;
User* GetLoggedInUser() override;
const User* GetActiveUser() const override;
User* GetActiveUser() override;
const User* GetPrimaryUser() const override;
void SaveUserOAuthStatus(const std::string& user_id,
User::OAuthTokenStatus oauth_token_status) override;
void SaveForceOnlineSignin(const std::string& user_id,
bool force_online_signin) override;
void SaveUserDisplayName(const std::string& user_id,
const base::string16& display_name) override;
base::string16 GetUserDisplayName(const std::string& user_id) const override;
void SaveUserDisplayEmail(const std::string& user_id,
const std::string& display_email) override;
std::string GetUserDisplayEmail(const std::string& user_id) const override;
void SaveUserType(const std::string& user_id,
const UserType& user_type) override;
void UpdateUserAccountData(const std::string& user_id,
const UserAccountData& account_data) override;
bool IsCurrentUserOwner() const override;
bool IsCurrentUserNew() const override;
bool IsCurrentUserNonCryptohomeDataEphemeral() const override;
bool CanCurrentUserLock() const override;
bool IsUserLoggedIn() const override;
bool IsLoggedInAsUserWithGaiaAccount() const override;
bool IsLoggedInAsChildUser() const override;
bool IsLoggedInAsPublicAccount() const override;
bool IsLoggedInAsGuest() const override;
bool IsLoggedInAsSupervisedUser() const override;
bool IsLoggedInAsKioskApp() const override;
bool IsLoggedInAsStub() const override;
bool IsSessionStarted() const override;
bool IsUserNonCryptohomeDataEphemeral(
const std::string& user_id) const override;
void AddObserver(UserManager::Observer* obs) override;
void RemoveObserver(UserManager::Observer* obs) override;
void AddSessionStateObserver(
UserManager::UserSessionStateObserver* obs) override;
void RemoveSessionStateObserver(
UserManager::UserSessionStateObserver* obs) override;
void NotifyLocalStateChanged() override;
void ChangeUserChildStatus(User* user, bool is_child) override;
bool FindKnownUserPrefs(const UserID& user_id,
const base::DictionaryValue** out_value) override;
void UpdateKnownUserPrefs(const UserID& user_id,
const base::DictionaryValue& values,
bool clear) override;
bool GetKnownUserStringPref(const UserID& user_id,
const std::string& path,
std::string* out_value) override;
void SetKnownUserStringPref(const UserID& user_id,
const std::string& path,
const std::string& in_value) override;
bool GetKnownUserBooleanPref(const UserID& user_id,
const std::string& path,
bool* out_value) override;
void SetKnownUserBooleanPref(const UserID& user_id,
const std::string& path,
const bool in_value) override;
bool GetKnownUserIntegerPref(const UserID& user_id,
const std::string& path,
int* out_value) override;
void SetKnownUserIntegerPref(const UserID& user_id,
const std::string& path,
const int in_value) override;
void UpdateGaiaID(const UserID& user_id, const std::string& gaia_id) override;
bool FindGaiaID(const UserID& user_id, std::string* out_value) override;
void UpdateUsingSAML(const std::string& user_id,
const bool using_saml) override;
bool FindUsingSAML(const std::string& user_id) override;
void SetKnownUserDeviceId(const UserID& user_id,
const std::string& device_id) override;
std::string GetKnownUserDeviceId(const UserID& user_id) override;
void SetKnownUserGAPSCookie(const UserID& user_id,
const std::string& gaps_cookie) override;
std::string GetKnownUserGAPSCookie(const UserID& user_id) override;
void UpdateReauthReason(const std::string& user_id,
const int reauth_reason) override;
bool FindReauthReason(const std::string& user_id, int* out_value) override;
virtual void SetIsCurrentUserNew(bool is_new);
// TODO(xiyuan): Figure out a better way to expose this info.
virtual bool HasPendingBootstrap(const std::string& user_id) const;
// Helper function that copies users from |users_list| to |users_vector| and
// |users_set|. Duplicates and users already present in |existing_users| are
// skipped.
static void ParseUserList(const base::ListValue& users_list,
const std::set<std::string>& existing_users,
std::vector<std::string>* users_vector,
std::set<std::string>* users_set);
// Returns true if trusted device policies have successfully been retrieved
// and ephemeral users are enabled.
virtual bool AreEphemeralUsersEnabled() const = 0;
// Adds |user| to users list, and adds it to front of LRU list. It is assumed
// that there is no user with same id.
virtual void AddUserRecord(User* user);
// Returns true if user may be removed.
virtual bool CanUserBeRemoved(const User* user) const;
// A wrapper around C++ delete operator. Deletes |user|, and when |user|
// equals to active_user_, active_user_ is reset to NULL.
virtual void DeleteUser(User* user);
// Returns the locale used by the application.
virtual const std::string& GetApplicationLocale() const = 0;
// Returns "Local State" PrefService instance.
virtual PrefService* GetLocalState() const = 0;
// Loads |users_| from Local State if the list has not been loaded yet.
// Subsequent calls have no effect. Must be called on the UI thread.
virtual void EnsureUsersLoaded();
// Handle OAuth token |status| change for |user_id|.
virtual void HandleUserOAuthTokenStatusChange(
const std::string& user_id,
User::OAuthTokenStatus status) const = 0;
// Returns true if device is enterprise managed.
virtual bool IsEnterpriseManaged() const = 0;
// Helper function that copies users from |users_list| to |users_vector| and
// |users_set|. Duplicates and users already present in |existing_users| are
// skipped.
// Loads public accounts from the Local state and fills in
// |public_sessions_set|.
virtual void LoadPublicAccounts(
std::set<std::string>* public_sessions_set) = 0;
// Notifies that user has logged in.
virtual void NotifyOnLogin();
// Notifies observers that another user was added to the session.
// If |user_switch_pending| is true this means that user has not been fully
// initialized yet like waiting for profile to be loaded.
virtual void NotifyUserAddedToSession(const User* added_user,
bool user_switch_pending);
// Performs any additional actions before user list is loaded.
virtual void PerformPreUserListLoadingActions() = 0;
// Performs any additional actions after user list is loaded.
virtual void PerformPostUserListLoadingActions() = 0;
// Performs any additional actions after UserLoggedIn() execution has been
// completed.
// |browser_restart| is true when reloading Chrome after crash to distinguish
// from normal sign in flow.
virtual void PerformPostUserLoggedInActions(bool browser_restart) = 0;
// Implementation for RemoveUser method. It is synchronous. It is called from
// RemoveUserInternal after owner check.
virtual void RemoveNonOwnerUserInternal(const std::string& user_email,
RemoveUserDelegate* delegate);
// Removes a regular or supervised user from the user list.
// Returns the user if found or NULL otherwise.
// Also removes the user from the persistent user list.
User* RemoveRegularOrSupervisedUserFromList(const std::string& user_id);
// Implementation for RemoveUser method. This is an asynchronous part of the
// method, that verifies that owner will not get deleted, and calls
// |RemoveNonOwnerUserInternal|.
virtual void RemoveUserInternal(const std::string& user_email,
RemoveUserDelegate* delegate);
// Removes data stored or cached outside the user's cryptohome (wallpaper,
// avatar, OAuth token status, display name, display email).
virtual void RemoveNonCryptohomeData(const std::string& user_id);
// Check for a particular user type.
// Returns true if |user_id| represents demo app.
virtual bool IsDemoApp(const std::string& user_id) const = 0;
// Returns true if |user_id| represents kiosk app.
virtual bool IsKioskApp(const std::string& user_id) const = 0;
// Returns true if |user_id| represents public account that has been marked
// for deletion.
virtual bool IsPublicAccountMarkedForRemoval(
const std::string& user_id) const = 0;
// These methods are called when corresponding user type has signed in.
// Indicates that the demo account has just logged in.
virtual void DemoAccountLoggedIn() = 0;
// Indicates that a user just logged in as guest.
virtual void GuestUserLoggedIn();
// Indicates that a kiosk app robot just logged in.
virtual void KioskAppLoggedIn(const std::string& app_id) = 0;
// Indicates that a user just logged into a public session.
virtual void PublicAccountUserLoggedIn(User* user) = 0;
// Indicates that a regular user just logged in.
virtual void RegularUserLoggedIn(const std::string& user_id);
// Indicates that a regular user just logged in as ephemeral.
virtual void RegularUserLoggedInAsEphemeral(const std::string& user_id);
// Indicates that a supervised user just logged in.
virtual void SupervisedUserLoggedIn(const std::string& user_id) = 0;
// Should be called when regular user was removed.
virtual void OnUserRemoved(const std::string& user_id) = 0;
// Getters/setters for private members.
virtual void SetCurrentUserIsOwner(bool is_current_user_owner);
virtual bool GetEphemeralUsersEnabled() const;
virtual void SetEphemeralUsersEnabled(bool enabled);
virtual void SetOwnerEmail(const std::string& owner_user_id);
virtual const std::string& GetPendingUserSwitchID() const;
virtual void SetPendingUserSwitchID(const std::string& user_id);
// The logged-in user that is currently active in current session.
// NULL until a user has logged in, then points to one
// of the User instances in |users_|, the |guest_user_| instance or an
// ephemeral user instance.
User* active_user_;
// The primary user of the current session. It is recorded for the first
// signed-in user and does not change thereafter.
User* primary_user_;
// List of all known users. User instances are owned by |this|. Regular users
// are removed by |RemoveUserFromList|, public accounts by
// |UpdateAndCleanUpPublicAccounts|.
UserList users_;
// List of all users that are logged in current session. These point to User
// instances in |users_|. Only one of them could be marked as active.
UserList logged_in_users_;
// A list of all users that are logged in the current session. In contrast to
// |logged_in_users|, the order of this list is least recently used so that
// the active user should always be the first one in the list.
UserList lru_logged_in_users_;
// Stages of loading user list from preferences. Some methods can have
// different behavior depending on stage.
// Returns a list of users who have logged into this device previously.
// Same as GetUsers but used if you need to modify User from that list.
UserList& GetUsersAndModify();
// Returns the user with the given email address if found in the persistent
// list. Returns |NULL| otherwise.
const User* FindUserInList(const std::string& user_id) const;
// Returns |true| if user with the given id is found in the persistent list.
// Returns |false| otherwise. Does not trigger user loading.
bool UserExistsInList(const std::string& user_id) const;
// Same as FindUserInList but returns non-const pointer to User object.
User* FindUserInListAndModify(const std::string& user_id);
// Reads user's oauth token status from local state preferences.
User::OAuthTokenStatus LoadUserOAuthStatus(const std::string& user_id) const;
// Read a flag indicating whether online authentication against GAIA should
// be enforced during the user's next sign-in from local state preferences.
bool LoadForceOnlineSignin(const std::string& user_id) const;
// Notifies observers that merge session state had changed.
void NotifyMergeSessionStateChanged();
// Notifies observers that active user has changed.
void NotifyActiveUserChanged(const User* active_user);
// Notifies observers that active user_id hash has changed.
void NotifyActiveUserHashChanged(const std::string& hash);
// Update the global LoginState.
void UpdateLoginState();
// Insert |user| at the front of the LRU user list.
void SetLRUUser(User* user);
// Sends metrics in response to a user with gaia account (regular) logging in.
void SendGaiaUserLoginMetrics(const std::string& user_id);
// Sets account locale for user with id |user_id|.
virtual void UpdateUserAccountLocale(const std::string& user_id,
const std::string& locale);
// Updates user account after locale was resolved.
void DoUpdateAccountLocale(const std::string& user_id,
scoped_ptr<std::string> resolved_locale);
// Removes all user preferences associated with |user_id|.
void RemoveKnownUserPrefs(const UserID& user_id);
// Indicates stage of loading user from prefs.
UserLoadStage user_loading_stage_;
// True if SessionStarted() has been called.
bool session_started_;
// Cached flag of whether currently logged-in user is owner or not.
// May be accessed on different threads, requires locking.
bool is_current_user_owner_;
mutable base::Lock is_current_user_owner_lock_;
// Cached flag of whether the currently logged-in user existed before this
// login.
bool is_current_user_new_;
// Cached flag of whether the currently logged-in user is a regular user who
// logged in as ephemeral. Storage of persistent information is avoided for
// such users by not adding them to the persistent user list, not downloading
// their custom avatars and mounting their cryptohomes using tmpfs. Defaults
// to |false|.
bool is_current_user_ephemeral_regular_user_;
// Cached flag indicating whether the ephemeral user policy is enabled.
// Defaults to |false| if the value has not been read from trusted device
// policy yet.
bool ephemeral_users_enabled_;
// Cached name of device owner. Defaults to empty string if the value has not
// been read from trusted device policy yet.
std::string owner_email_;
base::ObserverList<UserManager::Observer> observer_list_;
// TODO(nkostylev): Merge with session state refactoring CL.
// Time at which this object was created.
base::TimeTicks manager_creation_time_;
// ID of the user just added to the session that needs to be activated
// as soon as user's profile is loaded.
std::string pending_user_switch_;
// ID of the user that was active in the previous session.
// Preference value is stored here before first user signs in
// because pref will be overidden once session restore starts.
std::string last_session_active_user_;
bool last_session_active_user_initialized_;
// TaskRunner for UI thread.
scoped_refptr<base::TaskRunner> task_runner_;
// TaskRunner for SequencedWorkerPool.
scoped_refptr<base::TaskRunner> blocking_task_runner_;
base::WeakPtrFactory<UserManagerBase> weak_factory_;
} // namespace user_manager