<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Console\Question;
/**
* Represents a yes/no question.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class ConfirmationQuestion extends Question
{
private $trueAnswerRegex;
/**
* Constructor.
*
* @param string $question The question to ask to the user
* @param bool $default The default answer to return, true or false
* @param string $trueAnswerRegex A regex to match the "yes" answer
*/
public function __construct($question, $default = true, $trueAnswerRegex = '/^y/i')
{
parent::__construct($question, (bool) $default);
$this->trueAnswerRegex = $trueAnswerRegex;
$this->setNormalizer($this->getDefaultNormalizer());
}
/**
* Returns the default answer normalizer.
*
* @return callable
*/
private function getDefaultNormalizer()
{
$default = $this->getDefault();
$regex = $this->trueAnswerRegex;
return function ($answer) use ($default, $regex) {
if (is_bool($answer)) {
return $answer;
}
$answerIsTrue = (bool) preg_match($regex, $answer);
if (false === $default) {
return $answer && $answerIsTrue;
}
return !$answer || $answerIsTrue;
};
}
}
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