work_time-1.0.x-dev/modules/fingerprint/src/Form/FingerprintConfigForm.php

<?php

namespace Drupal\fingerprint\Form;

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

/**
 * Configuration form for a work time fingerprint entity type.
 */
class FingerprintConfigForm extends ConfigFormBase {

  /**
   * Name of the config.
   *
   * @var string
   */
  public static $configName = 'fingerprint.settings';

  /**
   * {@inheritdoc}
   */
  protected function getEditableConfigNames() {
    return [self::$configName];
  }

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'fingerprint_settings';
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {

    $config = $this->config(self::$configName);
    $form['shift'] = [
      '#title' => $this->t('Shift schedule'),
      '#description' => $this->t('Enter schedule hour in/out time, Example "08:00-17:30,5:00-14:30,14:00-22:30,... Format H:i"'),
      '#type' => 'textarea',
      '#default_value' => $config->get('shift'),
    ];
    $form['shift_night'] = [
      '#title' => $this->t('Night shift begin'),
      '#description' => $this->t('Hours begin night shift, Example: 19:00'),
      '#type' => 'textfield',
      '#default_value' => $config->get('shift_night'),
    ];
    $form['actions'] = [
      '#type' => 'actions',
    ];

    $form['actions']['submit'] = [
      '#type' => 'submit',
      '#value' => $this->t('Save'),
    ];

    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    // Retrieve the configuration.
    $this->config(self::$configName)
      // Set the submitted configuration setting.
      ->set('shift', $form_state->getValue('shift'))
      ->set('shift_night', $form_state->getValue('shift_night'))
      ->save();
    $this->messenger()
      ->addStatus($this->t('The configuration has been updated.'));
  }

}