unenrolled-courses.php

<?php

add_shortcode('mpcs-unenrolled-courses', function() {
  $unenrolled_courses = array();
  $current_user = MeprUtils::get_currentuserinfo();
  $mepr_user = new MeprUser($current_user->ID);

  $courses = get_posts(array('post_type' => 'mpcs-course', 'post_status' => 'publish', 'posts_per_page' => '-1', 'orderby'=> 'title', 'order' => 'ASC'));

  if(false == MeprUtils::is_logged_in_and_an_admin()) {
    $courses = array_filter($courses, function($course) use ( $mepr_user ) {
      return true == \MeprRule::is_locked_for_user($mepr_user, $course);
    });
  }

  $courses_ids = array_map(function($c) {
    return is_object($c) ? $c->ID : $c['ID'];
  }, $courses);

  if (empty($courses_ids)) {
    $courses_ids = array ( 0 );
  }

  $course_query = new \WP_Query(array('post_type' => 'mpcs-course', 'post_status' => 'publish', 'posts_per_page' => '-1', 'orderby'=> 'post__in', 'order' => 'ASC', 'post__in' => $courses_ids));
  $course_posts = $course_query->get_posts();

  foreach ($course_posts as $course) {
    $unenrolled_courses[] = $course;
  }

  $content = '<ul>';
  foreach($unenrolled_courses as $course) {
    $content .= '<li>' . $course->post_title . '</li>';
  }
  $content .= '</ul>';

  return $content;

});