/**
* 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;
};
}
/**
* Make a part of the pattern
*
* @param Regex $rule
* @return string
*/
protected static function makePart(self $rule)
{
if ($rule->is_original && $rule->types(self::TYPE_NORMAL)) {
return $rule->piece;
}
$core = $rule->is_number || $rule->is_original ? $rule->piece : $rule->piece . Straw::getConfigure('sub_characters');
$repeat = self::makeRepeatPattern($rule->length);
return sprintf('[%s]{%s,%s}', $core, $repeat[0], $repeat[1]);
}
/**
* Add regex rule
*
* @param string|string[] $key
* @param string|string[] $default
* @param int $type
* @return Regex
*/
private function addRegex($key, $default, $type)
{
return $default || $this->existsSource($key) ? $this->register(Regex::create($key, $default, $type)) : self::getDummy('regex');
}
