/**
* Apply rules to src data recursively.
*
* @param array $src
* @param array $rules
* @param string $prefix
* @param RuleSet $injectedInstance
* @return array mixed
*/
public static function filter($src, $rules, $prefix = null, RuleSet $injectedInstance = null)
{
$result = array();
$ruleSet = $injectedInstance ?: self::instance();
foreach ($rules as $key => $rule) {
if (self::has($rule)) {
if (self::isList($rule)) {
if (is_array($src[$key])) {
$size = count($src[$key]);
if ($rule['max'] && $size > $rule['max']) {
$ruleSet->handle($src[$key], self::buildKey($key, $prefix), self::MESSAGE_ARRAY_SIZE_TOO_LARGE);
} elseif ($rule['min'] && $size < $rule['min']) {
$ruleSet->handle($src[$key], self::buildKey($key, $prefix), self::MESSAGE_ARRAY_SIZE_TOO_SMALL);
} else {
foreach ($src[$key] as $srcKey => $srcValue) {
$result[$key][$srcKey] = self::filter($srcValue, $rule['rules'], self::buildKey($key . "." . $srcKey, $prefix), $injectedInstance);
}
}
} else {
if ($rule['min']) {
$ruleSet->handle(null, self::buildKey($key, $prefix), self::MESSAGE_ARRAY_IS_INVALID);
} else {
// skip
}
}
} else {
if (is_array($src[$key])) {
$result[$key] = self::filter($src[$key], $rule['rules'], self::buildKey($key, $prefix), $injectedInstance);
} else {
if ($rule['required']) {
$ruleSet->handle(null, self::buildKey($key, $prefix), self::MESSAGE_ARRAY_IS_INVALID);
} else {
// skip
}
}
}
} else {
$objRule = Rule::instance();
$result[$key] = $objRule->load($rule)->apply($src[$key]);
if (!Rule::isValid($result[$key])) {
// Skip handle if default value is not null.
if ($objRule->defaulted(null) !== null) {
$result[$key] = $objRule->defaulted(null);
} elseif ($objRule->required(null) || strlen(trim($src[$key])) > 0) {
$ruleSet->handle($src[$key], self::buildKey($key, $prefix));
}
}
}
}
return $result;
}