Viewing file:  StrictConfirmationQuestion.php (2.6 KB) -rw-r--r--
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<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Composer\Question;
use Symfony\Component\Console\Exception\InvalidArgumentException;
use Symfony\Component\Console\Question\Question;
/**
* Represents a yes/no question
* Enforces strict responses rather than non-standard answers counting as default
* Based on Symfony\Component\Console\Question\ConfirmationQuestion
*
* @author Theo Tonge <theo@theotonge.co.uk>
*/
class StrictConfirmationQuestion extends Question
{
private $trueAnswerRegex;
private $falseAnswerRegex;
/**
* Constructor.s
*
* @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
* @param string $falseAnswerRegex A regex to match the "no" answer
*/
public function __construct($question, $default = true, $trueAnswerRegex = '/^y(?:es)?$/i', $falseAnswerRegex = '/^no?$/i')
{
parent::__construct($question, (bool) $default);
$this->trueAnswerRegex = $trueAnswerRegex;
$this->falseAnswerRegex = $falseAnswerRegex;
$this->setNormalizer($this->getDefaultNormalizer());
$this->setValidator($this->getDefaultValidator());
}
/**
* Returns the default answer normalizer.
*
* @return callable
*/
private function getDefaultNormalizer()
{
$default = $this->getDefault();
$trueRegex = $this->trueAnswerRegex;
$falseRegex = $this->falseAnswerRegex;
return function ($answer) use ($default, $trueRegex, $falseRegex) {
if (is_bool($answer)) {
return $answer;
}
if (empty($answer) && !empty($default)) {
return $default;
}
if (preg_match($trueRegex, $answer)) {
return true;
}
if (preg_match($falseRegex, $answer)) {
return false;
}
return null;
};
}
/**
* Returns the default answer validator.
*
* @return callable
*/
private function getDefaultValidator()
{
return function ($answer) {
if (!is_bool($answer)) {
throw new InvalidArgumentException('Please answer yes, y, no, or n.');
}
return $answer;
};
}
}
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