/**
* For Regex
*
* @param Regex $rule
* @return callable|null
*/
public static function regex(Regex $rule)
{
$filters = array();
$is_multiple = !$rule->types(Regex::TYPE_NORMAL);
$is_multiple and $filters[] = Cast::explode($rule);
if ($rule->types(Regex::TYPE_RANGE)) {
$filters[] = Cast::fillSide($rule);
$filters[] = Check::greaterThanOrEqual();
$rule->info('is_datetime') and $filters[] = Cast::datetime($rule);
}
if ($rule->info('is_number')) {
$filters[] = $is_multiple ? Check::numberMultiple($rule) : Check::number($rule);
}
$count = count($filters);
if (!$count) {
return null;
}
if ($count === 1) {
return $filters[0];
}
return function ($input) use($filters) {
foreach ($filters as $filter) {
$input = $filter($input);
if ($input === null) {
return null;
}
}
return $input;
};
}
/**
* Validate enum
*
* @param string|string[] $value
* @return string|null
*/
protected function validateEnum($value)
{
$enum = Check::enum($this->candidates);
return $enum($value);
}
