Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Console\Question;
Chris@0: 
Chris@0: /**
Chris@0:  * Represents a yes/no question.
Chris@0:  *
Chris@0:  * @author Fabien Potencier <fabien@symfony.com>
Chris@0:  */
Chris@0: class ConfirmationQuestion extends Question
Chris@0: {
Chris@0:     private $trueAnswerRegex;
Chris@0: 
Chris@0:     /**
Chris@0:      * @param string $question        The question to ask to the user
Chris@0:      * @param bool   $default         The default answer to return, true or false
Chris@0:      * @param string $trueAnswerRegex A regex to match the "yes" answer
Chris@0:      */
Chris@0:     public function __construct($question, $default = true, $trueAnswerRegex = '/^y/i')
Chris@0:     {
Chris@0:         parent::__construct($question, (bool) $default);
Chris@0: 
Chris@0:         $this->trueAnswerRegex = $trueAnswerRegex;
Chris@0:         $this->setNormalizer($this->getDefaultNormalizer());
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns the default answer normalizer.
Chris@0:      *
Chris@0:      * @return callable
Chris@0:      */
Chris@0:     private function getDefaultNormalizer()
Chris@0:     {
Chris@0:         $default = $this->getDefault();
Chris@0:         $regex = $this->trueAnswerRegex;
Chris@0: 
Chris@0:         return function ($answer) use ($default, $regex) {
Chris@17:             if (\is_bool($answer)) {
Chris@0:                 return $answer;
Chris@0:             }
Chris@0: 
Chris@0:             $answerIsTrue = (bool) preg_match($regex, $answer);
Chris@0:             if (false === $default) {
Chris@0:                 return $answer && $answerIsTrue;
Chris@0:             }
Chris@0: 
Chris@17:             return '' === $answer || $answerIsTrue;
Chris@0:         };
Chris@0:     }
Chris@0: }