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<?php
namespace ipl\Validator;
/**
* Validator that uses a callback for the actual validation
*
* # Example Usage
* ```
* $dedup = new CallbackValidator(function ($value, CallbackValidator $validator) {
* if (already_exists_in_database($value)) {
* $validator->addMessage('Record already exists in database');
*
* return false;
* }
*
* return true;
* });
*
* $dedup->isValid($id);
* ```
*/
class CallbackValidator extends BaseValidator
{
/** @var callable Validation callback */
protected $callback;
/**
* Create a new callback validator
*
* @param callable $callback Validation callback
*/
public function __construct(callable $callback)
{
$this->callback = $callback;
}
public function isValid($value)
{
// Multiple isValid() calls must not stack validation messages
$this->clearMessages();
return call_user_func($this->callback, $value, $this);
}
}
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