social_event_max_enroll.module in Open Social 8.7

The Social Event Max Enroll module.

File

modules/social_features/social_event/modules/social_event_max_enroll/social_event_max_enroll.module

<?php

/**
 * @file
 * The Social Event Max Enroll module.
 */
use Drupal\Core\Form\FormStateInterface;
use Drupal\node\NodeInterface;
use Drupal\views\Plugin\views\cache\CachePluginBase;
use Drupal\views\ViewExecutable;

/**
 * Implements hook_views_post_render().
 *
 * Alter "Event enrollments" views. Add number of spots left.
 */
function social_event_max_enroll_views_post_render(ViewExecutable $view, &$output, CachePluginBase $cache) {
  if ($view->current_display === 'event_enrollments' && $view
    ->id() === 'event_enrollments' && isset($output['#rows']) && !empty($view->args[0])) {
    $nid = $view->args[0];
    $node = \Drupal::entityTypeManager()
      ->getStorage('node')
      ->load($nid);
    $event_max_enroll_service = \Drupal::service('social_event_max_enroll.service');

    // Add spots left counter to the block title.
    if ($event_max_enroll_service
      ->isEnabled($node)) {

      // Count how many spots left.
      $left = $event_max_enroll_service
        ->getEnrollmentsLeft($node);
      $title_suffix = \Drupal::translation()
        ->formatPlural($left, '(1 spot left)', '(@count spots left)');
      $view->header['result']->options['content'] .= ' ' . $title_suffix;
    }
  }
}

/**
 * Implements hook_form_alter().
 *
 * Check and display "Allow anonymous enrollments" checkbox for public events.
 */
function social_event_max_enroll_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  switch ($form_id) {

    // Alter the Node Event forms.
    case 'node_event_form':
    case 'node_event_edit_form':
      $config = \Drupal::config('social_event_max_enroll.settings');

      // Hide checkbox if feature is disabled globally.
      $form['field_event_max_enroll']['#access'] = $config
        ->get('max_enroll');
      $form['field_event_max_enroll_num']['#access'] = $config
        ->get('max_enroll');

      // Hide checkbox if event enrollment is disabled for event.
      $state = [
        ':input[name="field_event_enroll[value]"]' => [
          'checked' => TRUE,
        ],
      ];
      $fields = [
        'field_event_max_enroll',
        'field_event_max_enroll_num',
      ];
      foreach ($fields as $field) {
        $form[$field]['#states'] = [
          'visible' => $state,
        ];
      }

      // Show the checkbox only when max enroll is enabled.
      if ($config
        ->get('max_enroll_required')) {
        $form['field_event_max_enroll']['widget']['value']['#default_value'] = TRUE;
        $form['field_event_max_enroll']['widget']['value']['#disabled'] = TRUE;
        $form['field_event_max_enroll']['widget']['value']['#required'] = TRUE;
        $form['field_event_max_enroll_num']['widget'][0]['value']['#required'] = TRUE;
      }
      else {
        $form['field_event_max_enroll_num']['#states']['visible'][] = [
          ':input[name="field_event_max_enroll[value]"]' => [
            'checked' => TRUE,
          ],
        ];
      }
      break;

    // Alter the Event Enrollments forms.
    case 'enroll_action_form':
    case 'event_an_enroll_action_form':

      // We can't use dependency injection, because service is optional.
      $event_max_enroll_service = \Drupal::service('social_event_max_enroll.service');
      $node = \Drupal::routeMatch()
        ->getParameter('node');
      if ($node instanceof NodeInterface && $event_max_enroll_service
        ->isEnabled($node)) {

        // Count how many spots are left.
        $left = $event_max_enroll_service
          ->getEnrollmentsLeft($node);
        if ($left < 1) {
          $enrollments = FALSE;

          // Only load enrollments for authenticated users.
          if (\Drupal::currentUser()
            ->isAuthenticated()) {
            $enrollments = \Drupal::entityTypeManager()
              ->getStorage('event_enrollment')
              ->loadByProperties([
              'field_event' => $node
                ->id(),
              'user_id' => \Drupal::currentUser()
                ->id(),
            ]);
          }
          $an_enrollments = FALSE;

          // If Social Event AN Enroll module is enabled, check if the current
          // visitor is enrolled to the event.
          if (\Drupal::service('module_handler')
            ->moduleExists('social_event_an_enroll') && \Drupal::service('social_event_an_enroll.service')
            ->isEnrolled()) {
            $an_enrollments = TRUE;
          }

          // If this user or visitor is not enrolled to the event, show that
          // there are no more spots left.
          if (!$enrollments && !$an_enrollments) {
            if ($form_id === 'enroll_action_form') {
              $form['enroll_for_this_event']['#value'] = t('No spots left');
              $form['enroll_for_this_event']['#disabled'] = TRUE;
            }
            elseif ($form_id === 'event_an_enroll_action_form' && !isset($form['enroll_for_this_event'])) {
              $form['event_enrollment'] = [
                '#type' => 'submit',
                '#value' => t('No spots left'),
                '#disabled' => TRUE,
                '#attributes' => [
                  'class' => [
                    'btn',
                    'btn-accent',
                    'btn-lg',
                    'btn-raised',
                    'brand-bg-accent',
                    'waves-effect',
                  ],
                ],
              ];
            }
          }
        }
      }
      break;
  }
}

/**
 * Override variables for the social page hero data.
 */
function social_event_max_enroll_preprocess_page_hero_data(array &$variables) {
  $event_max_enroll_service = \Drupal::service('social_event_max_enroll.service');
  $node = $variables['node'];

  // Add spots left counter to the hero block.
  if ($event_max_enroll_service
    ->isEnabled($node)) {
    $total = $event_max_enroll_service
      ->getEnrollmentsNumber($node);
    $left = $event_max_enroll_service
      ->getEnrollmentsLeft($node);

    // Get the string for how many spots are left.
    $spots_left = \Drupal::translation()
      ->formatPlural($left, '(1 spot left)', '(@count spots left)');

    // Combine and display the amount people who enrolled and the spots left
    // strings.
    $variables['title_suffix'] = \Drupal::translation()
      ->formatPlural($total, '@total person has enrolled @spots_left', '@total people have enrolled @spots_left', [
      '@total' => $total,
      '@spots_left' => $spots_left,
    ]);
  }
}

Functions

Name	Description
social_event_max_enroll_form_alter	Implements hook_form_alter().
social_event_max_enroll_preprocess_page_hero_data	Override variables for the social page hero data.
social_event_max_enroll_views_post_render	Implements hook_views_post_render().