Adding a node as a step to a Course object

gistfile1.txt

/**
 * Adds a new step to a course
 * @param $course_id NID of the Course Node to add the step to
 * @param $step_node_id NID of the node to add as a step
 */
function my_module_add_existing_step_to_course($course_id, $step_node_id) {
  $node = node_load($course_id);
  $course = course_get_course($node);

  $new_weight = count($course->getObjects());

  global $user;

  $node_to_add = node_load($step_node_id);
  $node_type = $node_to_add->type;

  $module_types = array(
    'course_module' => 'course_content',
    'quiz' => 'course_quiz',
  );

  $module_type = $module_types[$node_type];

  $newObject = course_get_course_object($module_type, $node_type);
  $newObject->setUser($user);
  $newObject->setCourse($course);
  $newObject->setCourse($node->nid);
  $newObject->setModule($module_type);
  $newObject->setComponent($node_type);


  $newObject->setInstanceId($node_to_add->nid);
  $newObject->setOption('title', $node_to_add->title);
  $newObject->setOption('required', TRUE);
  $newObject->setOption('enabled', TRUE);
  $newObject->setOption('hidden', FALSE);

  $newObject->setOption('weight', $new_weight);

  $newObject->setOption(
    'plugins', array(
      'access' =>
        array(
          'conditional' =>
            array(
              'conditional_type' => 'completed',
              'conditional_time' => 0,
              'conditional_object' => $step_node_id,
              'conditional_hidden' => 0,
            )
        )
    )
  );

  $newObject->save();
}