improvements-2.x-dev/modules/improvements_form/improvements_form.tracking_submit.inc

<?php

use Drupal\contact\MessageForm;
use Drupal\Core\Ajax\SettingsCommand;
use Drupal\Core\Form\FormStateInterface;

/**
 * @see improvements_form_form_alter()
 */
function improvements_form_tracking_submit_form_alter(array &$form, FormStateInterface $form_state, string $form_id): void {
  // Add tracking form submit
  if (!empty($form['#tracking_submit'])) {
    $form_object = $form_state->getFormObject();

    // For contact message form
    if ($form_object instanceof MessageForm && isset($form['actions']['submit'])) {
      $form['actions']['submit']['#submit'][] = 'improvements_form_tracking_submit';
    }
    // For other forms
    else {
      $form['#submit'][] = 'improvements_form_tracking_submit';
    }
  }
}

/**
 * Tracking forms submit callback.
 *
 * @see improvements_form_tracking_submit_form_alter()
 */
function improvements_form_tracking_submit(array $form, FormStateInterface $form_state): void {
  $session = \Drupal::request()->getSession();
  $submitted_forms = $session->get('submitted_forms', []);
  $form_id = $form_state->getFormObject()->getFormId();

  if (!in_array($form_id, $submitted_forms)) {
    $submitted_forms[] = $form_id;
  }

  $session->set('submitted_forms', $submitted_forms);
}

/**
 * Return submitted forms from session and clear session.
 */
function improvements_form_get_submitted_forms(): array {
  if ($session = \Drupal::request()->getSession()) {
    $submitted_forms = $session->get('submitted_forms', []);
    if ($submitted_forms) {
      $session->remove('submitted_forms');
    }
    return $submitted_forms;
  }
  return [];
}

/**
 * Implements hook_page_attachments().
 */
function improvements_form_page_attachments(array &$page): void {
  // Add to js info about submitted forms.
  // @TODO Add support page cache
  if ($submitted_forms = improvements_form_get_submitted_forms()) {
    $page['#attached']['drupalSettings']['submittedForms'] = $submitted_forms;
    $page['#attached']['library'][] = 'core/drupalSettings';
  }
}

/**
 * Implements hook_ajax_render_alter().
 */
function improvements_form_ajax_render_alter(array &$data): void {
  // Add submitted forms ids to drupalSettings
  if ($submitted_forms = improvements_form_get_submitted_forms()) {
    $command = new SettingsCommand(['submittedForms' => $submitted_forms]);
    $data[] = $command->render();
  }
}