/**
* Evaluate the contao 2 sorting flag into grouping mode.
*
* @param ListingConfigInterface|PropertyInterface $config The property to evaluate the flag for.
*
* @param int $flag The flag to be evaluated.
*
* @return void
*/
protected function evalFlagGrouping($config, $flag)
{
if ($flag < 0 || $flag > 12) {
return;
}
if ($flag <= 4) {
$config->setGroupingMode(ListingConfigInterface::GROUP_CHAR);
} elseif ($flag <= 6) {
$config->setGroupingMode(ListingConfigInterface::GROUP_DAY);
} elseif ($flag <= 8) {
$config->setGroupingMode(ListingConfigInterface::GROUP_MONTH);
} elseif ($flag <= 10) {
$config->setGroupingMode(ListingConfigInterface::GROUP_YEAR);
} else {
$config->setGroupingMode(ListingConfigInterface::GROUP_NONE);
}
}
