projectdocumentation-1.0.x-dev/src/Form/SalutationConfigurationForm.php

<?php

namespace Drupal\projectdocumentation\Form;

use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormStateInterface;

/**
 * Configuration form definition for the salutation message.
 */
class SalutationConfigurationForm extends ConfigFormBase {
  /**
   * {@inheritdoc}
   */
  protected function getEditableConfigNames() {
    return ['projectdocumentation.custom_salutation'];
  }
  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'salutation_configuration_form';
  }
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $config = $this->config('projectdocumentation.custom_salutation');
    $form['salutation'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Salutation'),
      '#description' => $this->t('Please provide the salutation you want to use.'),
      '#default_value' => $config->get('salutation'),
    );
    return parent::buildForm($form, $form_state);
  }
  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $this->config('projectdocumentation.custom_salutation')
      ->set('salutation', $form_state->getValue('salutation'))
      ->save();
    parent::submitForm($form, $form_state);
  }
}