/**
* Returns all tag sets.
*
* @param string|null $indexBy
* @return array
*/
public function getAllTagSets($indexBy = null)
{
if (!$this->_fetchedAllTagSets) {
$tagSetRecords = TagSetRecord::model()->ordered()->findAll();
$this->_tagSetsById = TagSetModel::populateModels($tagSetRecords, 'id');
$this->_fetchedAllTagSets = true;
}
if ($indexBy == 'id') {
return $this->_tagSetsById;
} else {
if (!$indexBy) {
return array_values($this->_tagSetsById);
} else {
$tagSets = array();
foreach ($this->_tagSetsById as $set) {
$tagSets[$set->{$indexBy}] = $set;
}
return $tagSets;
}
}
}
