* * 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 */ class ConfirmationQuestion extends Question { private $trueAnswerRegex; /** * @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(string $question, bool $default = true, string $trueAnswerRegex = '/^y/i') { parent::__construct($question, $default); $this->trueAnswerRegex = $trueAnswerRegex; $this->setNormalizer($this->getDefaultNormalizer()); } /** * Returns the default answer normalizer. */ private function getDefaultNormalizer(): callable { $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; }; } }