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98 lines
2.8 KiB
PHP
98 lines
2.8 KiB
PHP
<?php declare(strict_types=1);
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/*
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* This file is part of Composer.
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*
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* (c) Nils Adermann <naderman@naderman.de>
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* Jordi Boggiano <j.boggiano@seld.be>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Composer\Question;
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use Composer\Pcre\Preg;
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use Symfony\Component\Console\Exception\InvalidArgumentException;
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use Symfony\Component\Console\Question\Question;
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/**
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* Represents a yes/no question
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* Enforces strict responses rather than non-standard answers counting as default
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* Based on Symfony\Component\Console\Question\ConfirmationQuestion
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*
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* @author Theo Tonge <theo@theotonge.co.uk>
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*/
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class StrictConfirmationQuestion extends Question
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{
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/** @var non-empty-string */
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private $trueAnswerRegex;
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/** @var non-empty-string */
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private $falseAnswerRegex;
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/**
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* Constructor.s
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*
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* @param string $question The question to ask to the user
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* @param bool $default The default answer to return, true or false
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* @param non-empty-string $trueAnswerRegex A regex to match the "yes" answer
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* @param non-empty-string $falseAnswerRegex A regex to match the "no" answer
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*/
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public function __construct(string $question, bool $default = true, string $trueAnswerRegex = '/^y(?:es)?$/i', string $falseAnswerRegex = '/^no?$/i')
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{
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parent::__construct($question, (bool) $default);
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$this->trueAnswerRegex = $trueAnswerRegex;
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$this->falseAnswerRegex = $falseAnswerRegex;
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$this->setNormalizer($this->getDefaultNormalizer());
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$this->setValidator($this->getDefaultValidator());
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}
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/**
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* Returns the default answer normalizer.
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*
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* @return callable
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*/
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private function getDefaultNormalizer(): callable
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{
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$default = $this->getDefault();
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$trueRegex = $this->trueAnswerRegex;
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$falseRegex = $this->falseAnswerRegex;
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return function ($answer) use ($default, $trueRegex, $falseRegex) {
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if (is_bool($answer)) {
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return $answer;
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}
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if (empty($answer) && !empty($default)) {
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return $default;
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}
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if (Preg::isMatch($trueRegex, $answer)) {
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return true;
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}
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if (Preg::isMatch($falseRegex, $answer)) {
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return false;
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}
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return null;
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};
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}
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/**
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* Returns the default answer validator.
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*
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* @return callable
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*/
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private function getDefaultValidator(): callable
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{
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return function ($answer): bool {
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if (!is_bool($answer)) {
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throw new InvalidArgumentException('Please answer yes, y, no, or n.');
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}
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return $answer;
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};
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}
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}
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