simple_multistep-8.x-1.x-dev/src/StepIndicator.php

<?php

namespace Drupal\simple_multistep;

use Drupal\Core\Form\FormStateInterface;

/**
 * The StepIndicator class.
 *
 * @package Drupal\simple_multistep
 */
class StepIndicator extends FormStep {

  /**
   * Constructor for StepIndicator.
   *
   * @param array $form
   *   Form settings.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   Form state object.
   * @param int $current_step
   *   Current step.
   */
  public function __construct(array $form, FormStateInterface $form_state, int $current_step) {
    parent::__construct($form, $form_state);

    $this->currentStep = $current_step;
  }

  /**
   * Create indicator.
   *
   * @return array
   *   Returns the steps label.
   */
  private function createIndicator(): array {
    $steps_label = [
      '#type' => 'item',
      '#weight' => -1,
    ];

    $markup = '<div class="multi-steps-label">';
    foreach ($this->steps as $step_number => $step) {
      $format_settings = $step->format_settings;
      if ($format_settings['show_step_title']) {
        $active = $this->currentStep === $step_number ? ' active' : '';
        $markup .= '<div id="step-label-' . $step_number . '" class="step-label' . $active . '">';
        $markup .= $step->label;
        $markup .= '</div>';
      }
    }
    $markup .= '</div>';

    $steps_label['#markup'] = $markup;

    return $steps_label;
  }

  /**
   * Get Indicator.
   *
   * @param array $form
   *   Reference to form.
   */
  public function render(array &$form) {
    $form['steps_label'] = $this->createIndicator();
  }

}