protected function _genChangeFreq($a)
{
// calculate the date which is closest to now
$iDiffMin = PHP_INT_MAX;
$aDateFields = array('Date', 'EventStart', 'EventEnd');
foreach ($aDateFields as $sField) {
$iDiff = abs(time() - $a[$sField]);
if ($iDiff < $iDiffMin) {
$iDiffMin = $iDiff;
}
}
if ($iDiffMin != PHP_INT_MAX) {
$a[$this->_aQueryParts['field_date']] = time() - $iDiffMin;
}
return parent::_genChangeFreq($a);
}
