/**
* Get filter value for reset current filter state
*
* @param string $filterValue Filter value
* @return null|string
*/
public function getResetFilterValue($filterValue)
{
$separator = Mage::helper('oggetto_filter/data')->getSeparator();
if (is_array($filterValue)) {
$currentFromPrice = $filterValue[0];
} else {
$currentFromPrice = explode('-', $filterValue)[0];
}
$priorIntervals = $this->getPriorIntervals();
$value = array();
if ($priorIntervals) {
foreach ($priorIntervals as $priorInterval) {
if ($priorInterval[0] !== $currentFromPrice) {
$value[] = implode('-', $priorInterval);
}
}
return !empty($params) ? implode($separator, $value) : null;
}
return parent::getResetValue();
}
