class User

class User extends ContentEntityBase implements UserInterface {
    use EntityChangedTrait;
    
    /**
     * Stores a reference for a reusable anonymous user entity.
     *
     * @var \Drupal\user\UserInterface
     */
    protected static $anonymousUser;
    
    /**
     * {@inheritdoc}
     */
    public function isNew() {
        return !empty($this->enforceIsNew) || $this->id() === NULL;
    }
    
    /**
     * {@inheritdoc}
     */
    public function label() {
        return $this->getDisplayName();
    }
    
    /**
     * {@inheritdoc}
     */
    public function preSave(EntityStorageInterface $storage) {
        parent::preSave($storage);
        // Make sure that the authenticated/anonymous roles are not persisted.
        foreach ($this->get('roles') as $index => $item) {
            if (in_array($item->target_id, [
                RoleInterface::ANONYMOUS_ID,
                RoleInterface::AUTHENTICATED_ID,
            ])) {
                $this->get('roles')
                    ->offsetUnset($index);
            }
        }
        // Store account cancellation information.
        foreach ([
            'user_cancel_method',
            'user_cancel_notify',
        ] as $key) {
            if (isset($this->{$key})) {
                \Drupal::service('user.data')->set('user', $this->id(), substr($key, 5), $this->{$key});
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function postSave(EntityStorageInterface $storage, $update = TRUE) {
        parent::postSave($storage, $update);
        if ($update) {
            $session_manager = \Drupal::service('session_manager');
            // If the password has been changed, delete all open sessions for the
            // user and recreate the current one.
            if ($this->pass->value != $this->original->pass->value) {
                $session_manager->delete($this->id());
                if ($this->id() == \Drupal::currentUser()->id()) {
                    \Drupal::service('session')->migrate();
                }
            }
            // If the user was blocked, delete the user's sessions to force a logout.
            if ($this->original->status->value != $this->status->value && $this->status->value == 0) {
                $session_manager->delete($this->id());
            }
            // Send emails after we have the new user object.
            if ($this->status->value != $this->original->status->value) {
                // The user's status is changing; conditionally send notification email.
                $op = $this->status->value == 1 ? 'status_activated' : 'status_blocked';
                _user_mail_notify($op, $this);
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public static function postDelete(EntityStorageInterface $storage, array $entities) {
        parent::postDelete($storage, $entities);
        $uids = array_keys($entities);
        \Drupal::service('user.data')->delete(NULL, $uids);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getRoles($exclude_locked_roles = FALSE) {
        $roles = [];
        // Users with an ID always have the authenticated user role.
        if (!$exclude_locked_roles) {
            if ($this->isAuthenticated()) {
                $roles[] = RoleInterface::AUTHENTICATED_ID;
            }
            else {
                $roles[] = RoleInterface::ANONYMOUS_ID;
            }
        }
        foreach ($this->get('roles') as $role) {
            if ($role->target_id) {
                $roles[] = $role->target_id;
            }
        }
        return $roles;
    }
    
    /**
     * {@inheritdoc}
     */
    public function hasRole($rid) {
        return in_array($rid, $this->getRoles());
    }
    
    /**
     * {@inheritdoc}
     */
    public function addRole($rid) {
        if (in_array($rid, [
            RoleInterface::AUTHENTICATED_ID,
            RoleInterface::ANONYMOUS_ID,
        ])) {
            throw new \InvalidArgumentException('Anonymous or authenticated role ID must not be assigned manually.');
        }
        $roles = $this->getRoles(TRUE);
        $roles[] = $rid;
        $this->set('roles', array_unique($roles));
    }
    
    /**
     * {@inheritdoc}
     */
    public function removeRole($rid) {
        $this->set('roles', array_diff($this->getRoles(TRUE), [
            $rid,
        ]));
    }
    
    /**
     * {@inheritdoc}
     */
    public function hasPermission($permission) {
        // User #1 has all privileges.
        if ((int) $this->id() === 1) {
            return TRUE;
        }
        return $this->getRoleStorage()
            ->isPermissionInRoles($permission, $this->getRoles());
    }
    
    /**
     * {@inheritdoc}
     */
    public function getPassword() {
        return $this->get('pass')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setPassword($password) {
        $this->get('pass')->value = $password;
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getEmail() {
        return $this->get('mail')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setEmail($mail) {
        $this->get('mail')->value = $mail;
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCreatedTime() {
        return $this->get('created')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getLastAccessedTime() {
        return $this->get('access')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setLastAccessTime($timestamp) {
        $this->get('access')->value = $timestamp;
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getLastLoginTime() {
        return $this->get('login')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setLastLoginTime($timestamp) {
        $this->get('login')->value = $timestamp;
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function isActive() {
        return $this->get('status')->value == 1;
    }
    
    /**
     * {@inheritdoc}
     */
    public function isBlocked() {
        return $this->get('status')->value == 0;
    }
    
    /**
     * {@inheritdoc}
     */
    public function activate() {
        $this->get('status')->value = 1;
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function block() {
        $this->get('status')->value = 0;
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getTimeZone() {
        return $this->get('timezone')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getPreferredLangcode($fallback_to_default = TRUE) {
        $language_list = $this->languageManager()
            ->getLanguages();
        $preferred_langcode = $this->get('preferred_langcode')->value;
        if (!empty($preferred_langcode) && isset($language_list[$preferred_langcode])) {
            return $language_list[$preferred_langcode]->getId();
        }
        else {
            return $fallback_to_default ? $this->languageManager()
                ->getDefaultLanguage()
                ->getId() : '';
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function getPreferredAdminLangcode($fallback_to_default = TRUE) {
        $language_list = $this->languageManager()
            ->getLanguages();
        $preferred_langcode = $this->get('preferred_admin_langcode')->value;
        if (!empty($preferred_langcode) && isset($language_list[$preferred_langcode])) {
            return $language_list[$preferred_langcode]->getId();
        }
        else {
            return $fallback_to_default ? $this->languageManager()
                ->getDefaultLanguage()
                ->getId() : '';
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function getInitialEmail() {
        return $this->get('init')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function isAuthenticated() {
        return $this->id() > 0;
    }
    
    /**
     * {@inheritdoc}
     */
    public function isAnonymous() {
        return $this->id() == 0;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getAccountName() {
        return $this->get('name')->value ?: '';
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDisplayName() {
        $name = $this->getAccountName() ?: \Drupal::config('user.settings')->get('anonymous');
        \Drupal::moduleHandler()->alter('user_format_name', $name, $this);
        return $name;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setUsername($username) {
        $this->set('name', $username);
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setExistingPassword($password) {
        $this->get('pass')->existing = $password;
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function checkExistingPassword(UserInterface $account_unchanged) {
        $existing = $this->get('pass')->existing;
        return $existing !== NULL && strlen($existing) > 0 && \Drupal::service('password')->check(trim($existing), $account_unchanged->getPassword());
    }
    
    /**
     * Returns an anonymous user entity.
     *
     * @return \Drupal\user\UserInterface
     *   An anonymous user entity.
     */
    public static function getAnonymousUser() {
        if (!isset(static::$anonymousUser)) {
            // @todo Use the entity factory once available, see
            //   https://www.drupal.org/node/1867228.
            $entity_type_manager = \Drupal::entityTypeManager();
            $entity_type = $entity_type_manager->getDefinition('user');
            $class = $entity_type->getClass();
            static::$anonymousUser = new $class([
                'uid' => [
                    LanguageInterface::LANGCODE_DEFAULT => 0,
                ],
                'name' => [
                    LanguageInterface::LANGCODE_DEFAULT => '',
                ],
                // Explicitly set the langcode to ensure that field definitions do not
                // need to be fetched to figure out a default.
'langcode' => [
                    LanguageInterface::LANGCODE_DEFAULT => LanguageInterface::LANGCODE_NOT_SPECIFIED,
                ],
            ], $entity_type->id());
        }
        return clone static::$anonymousUser;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
        
        /** @var \Drupal\Core\Field\BaseFieldDefinition[] $fields */
        $fields = parent::baseFieldDefinitions($entity_type);
        $fields['uid']->setLabel(t('User ID'))
            ->setDescription(t('The user ID.'));
        $fields['uuid']->setDescription(t('The user UUID.'));
        $fields['langcode']->setLabel(t('Language code'))
            ->setDescription(t('The user language code.'))
            ->setDisplayOptions('form', [
            'region' => 'hidden',
        ]);
        $fields['preferred_langcode'] = BaseFieldDefinition::create('language')->setLabel(t('Preferred language code'))
            ->setDescription(t("The user's preferred language code for receiving emails and viewing the site."))
            ->addPropertyConstraints('value', [
            'AllowedValues' => [
                'callback' => __CLASS__ . '::getAllowedConfigurableLanguageCodes',
            ],
        ]);
        $fields['preferred_admin_langcode'] = BaseFieldDefinition::create('language')->setLabel(t('Preferred admin language code'))
            ->setDescription(t("The user's preferred language code for viewing administration pages."))
            ->setDefaultValue([
            0 => [
                'value' => NULL,
            ],
        ])
            ->addPropertyConstraints('value', [
            'AllowedValues' => [
                'callback' => __CLASS__ . '::getAllowedConfigurableLanguageCodes',
            ],
        ]);
        // The name should not vary per language. The username is the visual
        // identifier for a user and needs to be consistent in all languages.
        $fields['name'] = BaseFieldDefinition::create('string')->setLabel(t('Name'))
            ->setDescription(t('The name of this user.'))
            ->setRequired(TRUE)
            ->setConstraints([
            // No Length constraint here because the UserName constraint also covers
            // that.
'UserName' => [],
            'UserNameUnique' => [],
        ]);
        $fields['name']->getItemDefinition()
            ->setClass('\\Drupal\\user\\UserNameItem');
        $fields['pass'] = BaseFieldDefinition::create('password')->setLabel(t('Password'))
            ->setDescription(t('The password of this user (hashed).'))
            ->addConstraint('ProtectedUserField');
        $fields['mail'] = BaseFieldDefinition::create('email')->setLabel(t('Email'))
            ->setDescription(t('The email of this user.'))
            ->setDefaultValue('')
            ->addConstraint('UserMailUnique')
            ->addConstraint('UserMailRequired')
            ->addConstraint('ProtectedUserField');
        $fields['timezone'] = BaseFieldDefinition::create('string')->setLabel(t('Timezone'))
            ->setDescription(t('The timezone of this user.'))
            ->setSetting('max_length', 32)
            ->addPropertyConstraints('value', [
            'AllowedValues' => [
                'callback' => __CLASS__ . '::getAllowedTimezones',
            ],
        ]);
        $fields['timezone']->getItemDefinition()
            ->setClass(TimeZoneItem::class);
        $fields['status'] = BaseFieldDefinition::create('boolean')->setLabel(t('User status'))
            ->setDescription(t('Whether the user is active or blocked.'))
            ->setDefaultValue(FALSE);
        $fields['status']->getItemDefinition()
            ->setClass(StatusItem::class);
        $fields['created'] = BaseFieldDefinition::create('created')->setLabel(t('Created'))
            ->setDescription(t('The time that the user was created.'));
        $fields['changed'] = BaseFieldDefinition::create('changed')->setLabel(t('Changed'))
            ->setDescription(t('The time that the user was last edited.'))
            ->setTranslatable(TRUE);
        $fields['access'] = BaseFieldDefinition::create('timestamp')->setLabel(t('Last access'))
            ->setDescription(t('The time that the user last accessed the site.'))
            ->setDefaultValue(0);
        $fields['login'] = BaseFieldDefinition::create('timestamp')->setLabel(t('Last login'))
            ->setDescription(t('The time that the user last logged in.'))
            ->setDefaultValue(0);
        $fields['init'] = BaseFieldDefinition::create('email')->setLabel(t('Initial email'))
            ->setDescription(t('The email address used for initial account creation.'))
            ->setDefaultValue('');
        $fields['roles'] = BaseFieldDefinition::create('entity_reference')->setLabel(t('Roles'))
            ->setCardinality(BaseFieldDefinition::CARDINALITY_UNLIMITED)
            ->setDescription(t('The roles the user has.'))
            ->setSetting('target_type', 'user_role');
        return $fields;
    }
    
    /**
     * Returns the role storage object.
     *
     * @return \Drupal\user\RoleStorageInterface
     *   The role storage object.
     */
    protected function getRoleStorage() {
        return \Drupal::entityTypeManager()->getStorage('user_role');
    }
    
    /**
     * Defines allowed timezones for the field's AllowedValues constraint.
     *
     * @return string[]
     *   The allowed values.
     */
    public static function getAllowedTimezones() {
        return array_keys(system_time_zones());
    }
    
    /**
     * Defines allowed configurable language codes for AllowedValues constraints.
     *
     * @return string[]
     *   The allowed values.
     */
    public static function getAllowedConfigurableLanguageCodes() {
        return array_keys(\Drupal::languageManager()->getLanguages(LanguageInterface::STATE_CONFIGURABLE));
    }

}