function &instance($section_id)
{
static $lookup = false;
if (!$lookup) {
$lookup = new AMPContentLookup_LinksBySection($section_id);
} else {
$lookup->_addCriteriaSection($section_id);
$lookup->init();
}
return $lookup->dataset;
}
function makeCriteriaSection($value)
{
if (!is_numeric($value)) {
return false;
}
$related_links =& AMPContentLookup_LinksBySection::instance($value);
$simple_crit = 'type=' . $value;
if (!$related_links) {
return $simple_crit;
}
return '( ' . $simple_crit . ' OR id in( ' . join(',', array_keys($related_links)) . '))';
}
