class NegotiationBrowserDeleteForm

class NegotiationBrowserDeleteForm extends ConfirmFormBase {
    use ConfigFormBaseTrait;
    
    /**
     * The browser language code to be deleted.
     *
     * @var string
     */
    protected $browserLangcode;
    
    /**
     * {@inheritdoc}
     */
    protected function getEditableConfigNames() {
        return [
            'language.mappings',
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getQuestion() {
        return $this->t('Are you sure you want to delete %browser_langcode?', [
            '%browser_langcode' => $this->browserLangcode,
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCancelUrl() {
        return new Url('language.negotiation_browser');
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'language_negotiation_configure_browser_delete_form';
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state, $browser_langcode = NULL) {
        $this->browserLangcode = $browser_langcode;
        $form = parent::buildForm($form, $form_state);
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        $this->config('language.mappings')
            ->clear('map.' . $this->browserLangcode)
            ->save();
        $args = [
            '%browser' => $this->browserLangcode,
        ];
        $this->logger('language')
            ->notice('The browser language detection mapping for the %browser browser language code has been deleted.', $args);
        $this->messenger()
            ->addStatus($this->t('The mapping for the %browser browser language code has been deleted.', $args));
        $form_state->setRedirect('language.negotiation_browser');
    }

}