class AccountSettingsForm

class AccountSettingsForm extends ConfigFormBase {
    
    /**
     * The module handler.
     *
     * @var \Drupal\Core\Extension\ModuleHandlerInterface
     */
    protected $moduleHandler;
    
    /**
     * The role storage used when changing the admin role.
     *
     * @var \Drupal\user\RoleStorageInterface
     */
    protected $roleStorage;
    
    /**
     * Constructs a \Drupal\user\AccountSettingsForm object.
     *
     * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
     *   The factory for configuration objects.
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
     *   The module handler.
     * @param \Drupal\user\RoleStorageInterface $role_storage
     *   The role storage.
     */
    public function __construct(ConfigFactoryInterface $config_factory, ModuleHandlerInterface $module_handler, RoleStorageInterface $role_storage) {
        parent::__construct($config_factory);
        $this->moduleHandler = $module_handler;
        $this->roleStorage = $role_storage;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('config.factory'), $container->get('module_handler'), $container->get('entity_type.manager')
            ->getStorage('user_role'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'user_admin_settings';
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getEditableConfigNames() {
        return [
            'system.site',
            'user.mail',
            'user.settings',
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state) {
        $form = parent::buildForm($form, $form_state);
        $config = $this->config('user.settings');
        $mail_config = $this->config('user.mail');
        $site_config = $this->config('system.site');
        $form['#attached']['library'][] = 'user/drupal.user.admin';
        // Settings for anonymous users.
        $form['anonymous_settings'] = [
            '#type' => 'details',
            '#title' => $this->t('Anonymous users'),
            '#open' => TRUE,
        ];
        $form['anonymous_settings']['anonymous'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Name'),
            '#default_value' => $config->get('anonymous'),
            '#description' => $this->t('The name used to indicate anonymous users.'),
            '#required' => TRUE,
        ];
        // @todo Remove this check once language settings are generalized.
        if ($this->moduleHandler
            ->moduleExists('content_translation')) {
            $form['language'] = [
                '#type' => 'details',
                '#title' => $this->t('Language settings'),
                '#open' => TRUE,
                '#tree' => TRUE,
            ];
            $form_state->set([
                'content_translation',
                'key',
            ], 'language');
            $form['language'] += content_translation_enable_widget('user', 'user', $form, $form_state);
        }
        // User registration settings.
        $form['registration_cancellation'] = [
            '#type' => 'details',
            '#title' => $this->t('Registration and cancellation'),
            '#open' => TRUE,
        ];
        $form['registration_cancellation']['user_register'] = [
            '#type' => 'radios',
            '#title' => $this->t('Who can register accounts?'),
            '#default_value' => $config->get('register'),
            '#options' => [
                UserInterface::REGISTER_ADMINISTRATORS_ONLY => $this->t('Administrators only'),
                UserInterface::REGISTER_VISITORS => $this->t('Visitors'),
                UserInterface::REGISTER_VISITORS_ADMINISTRATIVE_APPROVAL => $this->t('Visitors, but administrator approval is required'),
            ],
        ];
        $form['registration_cancellation']['user_email_verification'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Require email verification when a visitor creates an account'),
            '#default_value' => $config->get('verify_mail'),
            '#description' => $this->t('New users will be required to validate their email address prior to logging into the site, and will be assigned a system-generated password. With this setting disabled, users will be logged in immediately upon registering, and may select their own passwords during registration.'),
        ];
        $form['registration_cancellation']['user_password_strength'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Enable password strength indicator'),
            '#default_value' => $config->get('password_strength'),
        ];
        $form['registration_cancellation']['user_cancel_method'] = [
            '#type' => 'radios',
            '#title' => $this->t('When cancelling a user account'),
            '#default_value' => $config->get('cancel_method'),
            '#description' => $this->t('Users with the %select-cancel-method or %administer-users <a href=":permissions-url">permissions</a> can override this default method.', [
                '%select-cancel-method' => $this->t('Select method for cancelling account'),
                '%administer-users' => $this->t('Administer users'),
                ':permissions-url' => Url::fromRoute('user.admin_permissions')->toString(),
            ]),
        ];
        $form['registration_cancellation']['user_cancel_method'] += user_cancel_methods();
        foreach (Element::children($form['registration_cancellation']['user_cancel_method']) as $key) {
            // All account cancellation methods that specify #access cannot be
            // configured as default method.
            // @see hook_user_cancel_methods_alter()
            if (isset($form['registration_cancellation']['user_cancel_method'][$key]['#access'])) {
                $form['registration_cancellation']['user_cancel_method'][$key]['#access'] = FALSE;
            }
        }
        // Default notifications address.
        $form['mail_notification_address'] = [
            '#type' => 'email',
            '#title' => $this->t('Notification email address'),
            '#default_value' => $site_config->get('mail_notification'),
            '#description' => $this->t("The email address to be used as the 'from' address for all account notifications listed below. If <em>'Visitors, but administrator approval is required'</em> is selected above, a notification email will also be sent to this address for any new registrations. Leave empty to use the default system email address <em>(%site-email).</em>", [
                '%site-email' => $site_config->get('mail'),
            ]),
            '#maxlength' => 180,
        ];
        $form['email'] = [
            '#type' => 'vertical_tabs',
            '#title' => $this->t('Emails'),
        ];
        // These email tokens are shared for all settings, so just define
        // the list once to help ensure they stay in sync.
        $email_token_help = $this->t('Available variables are: [site:name], [site:url], [user:display-name], [user:account-name], [user:mail], [site:login-url], [site:url-brief], [user:edit-url], [user:one-time-login-url], [user:cancel-url].');
        $form['email_admin_created'] = [
            '#type' => 'details',
            '#title' => $this->t('Welcome (new user created by administrator)'),
            '#open' => $config->get('register') == UserInterface::REGISTER_ADMINISTRATORS_ONLY,
            '#description' => $this->t('Edit the welcome email messages sent to new member accounts created by an administrator.') . ' ' . $email_token_help,
            '#group' => 'email',
        ];
        $form['email_admin_created']['user_mail_register_admin_created_subject'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Subject'),
            '#default_value' => $mail_config->get('register_admin_created.subject'),
            '#maxlength' => 180,
        ];
        $form['email_admin_created']['user_mail_register_admin_created_body'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Body'),
            '#default_value' => $mail_config->get('register_admin_created.body'),
            '#rows' => 15,
        ];
        $form['email_pending_approval'] = [
            '#type' => 'details',
            '#title' => $this->t('Welcome (awaiting approval)'),
            '#open' => $config->get('register') == UserInterface::REGISTER_VISITORS_ADMINISTRATIVE_APPROVAL,
            '#description' => $this->t('Edit the welcome email messages sent to new members upon registering, when administrative approval is required.') . ' ' . $email_token_help,
            '#group' => 'email',
        ];
        $form['email_pending_approval']['user_mail_register_pending_approval_subject'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Subject'),
            '#default_value' => $mail_config->get('register_pending_approval.subject'),
            '#maxlength' => 180,
        ];
        $form['email_pending_approval']['user_mail_register_pending_approval_body'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Body'),
            '#default_value' => $mail_config->get('register_pending_approval.body'),
            '#rows' => 8,
        ];
        $form['email_pending_approval_admin'] = [
            '#type' => 'details',
            '#title' => $this->t('Admin (user awaiting approval)'),
            '#open' => $config->get('register') == UserInterface::REGISTER_VISITORS_ADMINISTRATIVE_APPROVAL,
            '#description' => $this->t('Edit the email notifying the site administrator that there are new members awaiting administrative approval.') . ' ' . $email_token_help,
            '#group' => 'email',
        ];
        $form['email_pending_approval_admin']['register_pending_approval_admin_subject'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Subject'),
            '#default_value' => $mail_config->get('register_pending_approval_admin.subject'),
            '#maxlength' => 180,
        ];
        $form['email_pending_approval_admin']['register_pending_approval_admin_body'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Body'),
            '#default_value' => $mail_config->get('register_pending_approval_admin.body'),
            '#rows' => 8,
        ];
        $form['email_no_approval_required'] = [
            '#type' => 'details',
            '#title' => $this->t('Welcome (no approval required)'),
            '#open' => $config->get('register') == UserInterface::REGISTER_VISITORS,
            '#description' => $this->t('Edit the welcome email messages sent to new members upon registering, when no administrator approval is required.') . ' ' . $email_token_help,
            '#group' => 'email',
        ];
        $form['email_no_approval_required']['user_mail_register_no_approval_required_subject'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Subject'),
            '#default_value' => $mail_config->get('register_no_approval_required.subject'),
            '#maxlength' => 180,
        ];
        $form['email_no_approval_required']['user_mail_register_no_approval_required_body'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Body'),
            '#default_value' => $mail_config->get('register_no_approval_required.body'),
            '#rows' => 15,
        ];
        $form['email_password_reset'] = [
            '#type' => 'details',
            '#title' => $this->t('Password recovery'),
            '#description' => $this->t('Edit the email messages sent to users who request a new password.') . ' ' . $email_token_help,
            '#group' => 'email',
            '#weight' => 10,
        ];
        $form['email_password_reset']['user_mail_password_reset_subject'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Subject'),
            '#default_value' => $mail_config->get('password_reset.subject'),
            '#maxlength' => 180,
        ];
        $form['email_password_reset']['user_mail_password_reset_body'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Body'),
            '#default_value' => $mail_config->get('password_reset.body'),
            '#rows' => 12,
        ];
        $form['email_activated'] = [
            '#type' => 'details',
            '#title' => $this->t('Account activation'),
            '#description' => $this->t('Enable and edit email messages sent to users upon account activation (when an administrator activates an account of a user who has already registered, on a site where administrative approval is required).') . ' ' . $email_token_help,
            '#group' => 'email',
        ];
        $form['email_activated']['user_mail_status_activated_notify'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Notify user when account is activated'),
            '#default_value' => $config->get('notify.status_activated'),
        ];
        $form['email_activated']['settings'] = [
            '#type' => 'container',
            '#states' => [
                // Hide the additional settings when this email is disabled.
'invisible' => [
                    'input[name="user_mail_status_activated_notify"]' => [
                        'checked' => FALSE,
                    ],
                ],
            ],
        ];
        $form['email_activated']['settings']['user_mail_status_activated_subject'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Subject'),
            '#default_value' => $mail_config->get('status_activated.subject'),
            '#maxlength' => 180,
        ];
        $form['email_activated']['settings']['user_mail_status_activated_body'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Body'),
            '#default_value' => $mail_config->get('status_activated.body'),
            '#rows' => 15,
        ];
        $form['email_blocked'] = [
            '#type' => 'details',
            '#title' => $this->t('Account blocked'),
            '#description' => $this->t('Enable and edit email messages sent to users when their accounts are blocked.') . ' ' . $email_token_help,
            '#group' => 'email',
        ];
        $form['email_blocked']['user_mail_status_blocked_notify'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Notify user when account is blocked'),
            '#default_value' => $config->get('notify.status_blocked'),
        ];
        $form['email_blocked']['settings'] = [
            '#type' => 'container',
            '#states' => [
                // Hide the additional settings when the blocked email is disabled.
'invisible' => [
                    'input[name="user_mail_status_blocked_notify"]' => [
                        'checked' => FALSE,
                    ],
                ],
            ],
        ];
        $form['email_blocked']['settings']['user_mail_status_blocked_subject'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Subject'),
            '#default_value' => $mail_config->get('status_blocked.subject'),
            '#maxlength' => 180,
        ];
        $form['email_blocked']['settings']['user_mail_status_blocked_body'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Body'),
            '#default_value' => $mail_config->get('status_blocked.body'),
            '#rows' => 3,
        ];
        $form['email_cancel_confirm'] = [
            '#type' => 'details',
            '#title' => $this->t('Account cancellation confirmation'),
            '#description' => $this->t('Edit the email messages sent to users when they attempt to cancel their accounts.') . ' ' . $email_token_help,
            '#group' => 'email',
        ];
        $form['email_cancel_confirm']['user_mail_cancel_confirm_subject'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Subject'),
            '#default_value' => $mail_config->get('cancel_confirm.subject'),
            '#maxlength' => 180,
        ];
        $form['email_cancel_confirm']['user_mail_cancel_confirm_body'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Body'),
            '#default_value' => $mail_config->get('cancel_confirm.body'),
            '#rows' => 3,
        ];
        $form['email_canceled'] = [
            '#type' => 'details',
            '#title' => $this->t('Account canceled'),
            '#description' => $this->t('Enable and edit email messages sent to users when their accounts are canceled.') . ' ' . $email_token_help,
            '#group' => 'email',
        ];
        $form['email_canceled']['user_mail_status_canceled_notify'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Notify user when account is canceled'),
            '#default_value' => $config->get('notify.status_canceled'),
        ];
        $form['email_canceled']['settings'] = [
            '#type' => 'container',
            '#states' => [
                // Hide the settings when the cancel notify checkbox is disabled.
'invisible' => [
                    'input[name="user_mail_status_canceled_notify"]' => [
                        'checked' => FALSE,
                    ],
                ],
            ],
        ];
        $form['email_canceled']['settings']['user_mail_status_canceled_subject'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Subject'),
            '#default_value' => $mail_config->get('status_canceled.subject'),
            '#maxlength' => 180,
        ];
        $form['email_canceled']['settings']['user_mail_status_canceled_body'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Body'),
            '#default_value' => $mail_config->get('status_canceled.body'),
            '#rows' => 3,
        ];
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        parent::submitForm($form, $form_state);
        $this->config('user.settings')
            ->set('anonymous', $form_state->getValue('anonymous'))
            ->set('register', $form_state->getValue('user_register'))
            ->set('password_strength', $form_state->getValue('user_password_strength'))
            ->set('verify_mail', $form_state->getValue('user_email_verification'))
            ->set('cancel_method', $form_state->getValue('user_cancel_method'))
            ->set('notify.status_activated', $form_state->getValue('user_mail_status_activated_notify'))
            ->set('notify.status_blocked', $form_state->getValue('user_mail_status_blocked_notify'))
            ->set('notify.status_canceled', $form_state->getValue('user_mail_status_canceled_notify'))
            ->save();
        $this->config('user.mail')
            ->set('cancel_confirm.body', $form_state->getValue('user_mail_cancel_confirm_body'))
            ->set('cancel_confirm.subject', $form_state->getValue('user_mail_cancel_confirm_subject'))
            ->set('password_reset.body', $form_state->getValue('user_mail_password_reset_body'))
            ->set('password_reset.subject', $form_state->getValue('user_mail_password_reset_subject'))
            ->set('register_admin_created.body', $form_state->getValue('user_mail_register_admin_created_body'))
            ->set('register_admin_created.subject', $form_state->getValue('user_mail_register_admin_created_subject'))
            ->set('register_no_approval_required.body', $form_state->getValue('user_mail_register_no_approval_required_body'))
            ->set('register_no_approval_required.subject', $form_state->getValue('user_mail_register_no_approval_required_subject'))
            ->set('register_pending_approval.body', $form_state->getValue('user_mail_register_pending_approval_body'))
            ->set('register_pending_approval.subject', $form_state->getValue('user_mail_register_pending_approval_subject'))
            ->set('register_pending_approval_admin.body', $form_state->getValue('register_pending_approval_admin_body'))
            ->set('register_pending_approval_admin.subject', $form_state->getValue('register_pending_approval_admin_subject'))
            ->set('status_activated.body', $form_state->getValue('user_mail_status_activated_body'))
            ->set('status_activated.subject', $form_state->getValue('user_mail_status_activated_subject'))
            ->set('status_blocked.body', $form_state->getValue('user_mail_status_blocked_body'))
            ->set('status_blocked.subject', $form_state->getValue('user_mail_status_blocked_subject'))
            ->set('status_canceled.body', $form_state->getValue('user_mail_status_canceled_body'))
            ->set('status_canceled.subject', $form_state->getValue('user_mail_status_canceled_subject'))
            ->save();
        $this->config('system.site')
            ->set('mail_notification', $form_state->getValue('mail_notification_address'))
            ->save();
    }

}