/**
* @param ComponentInterface $source
* @param FormState $state
* @param $inputName
* @param string $validator
* @param ...$params
* @return bool
*/
public function validate(ComponentInterface $source, FormState $state, $inputName, $validator = Validator::HAS_VALUE, ...$params)
{
// if the input has no value (NULL), always return false
if ($state->hasValue($inputName, $source->getParent()) === false) {
return false;
}
// try to get the validator from the services
$validator = $state->getServices()->getValidators()->get($validator);
// get the current value for the target component
$sourceValue = $state->getValue($inputName, $source->getParent());
// return if the validator validates
return $validator->validate($sourceValue, $params);
}
