function do_course_toggle($id)
{
$this->build_course_list();
if (isset($this->courses[$id])) {
if ($this->courses[$id]->include_source == 'page_courses') {
$course = new entity($id);
$rels = $course->get_left_relationships_info();
foreach ($rels['course_template_to_page'] as $rel) {
if ($rel['entity_b'] == $this->get_source_page_id()) {
delete_relationship($rel['id']);
return true;
break;
}
}
} else {
if ($this->courses[$id]->include_source == 'categories') {
$course = new entity($id);
$rels = $course->get_left_relationships_info();
$cats = $this->get_page_categories();
foreach ($rels['course_template_to_category'] as $rel) {
if (isset($cats[$rel['entity_b']])) {
delete_relationship($rel['id']);
return true;
break;
}
}
}
}
} else {
if ($this->params['get_page_courses']) {
return create_relationship($id, $this->get_source_page_id(), relationship_id_of('course_template_to_page'), false, false);
} else {
if ($this->params['get_courses_by_page_categories']) {
if ($cats = $this->get_page_categories()) {
// For now we're just attaching the first page category we find to the course;
// a better, future interface would allow the user to pick the category.
$cat_id = key($cats);
return create_relationship($id, $cat_id, relationship_id_of('course_template_to_category'), false, false);
}
}
}
}
return false;
}
