120 lines
2.9 KiB
PHP
120 lines
2.9 KiB
PHP
<?php
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namespace Symfony\Components\Console\Helper;
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use Symfony\Components\Console\Output\OutputInterface;
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/*
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* This file is part of the symfony framework.
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*
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* (c) Fabien Potencier <fabien.potencier@symfony-project.com>
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*
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* This source file is subject to the MIT license that is bundled
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* with this source code in the file LICENSE.
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*/
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/**
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* The Dialog class provides helpers to interact with the user.
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*
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* @package symfony
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* @subpackage console
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* @author Fabien Potencier <fabien.potencier@symfony-project.com>
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*/
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class DialogHelper extends Helper
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{
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/**
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* Asks a question to the user.
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*
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* @param OutputInterface $output
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* @param string|array $question The question to ask
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* @param string $default The default answer if none is given by the user
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*
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* @param string The user answer
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*/
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public function ask(OutputInterface $output, $question, $default = null)
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{
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// @codeCoverageIgnoreStart
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$output->writeln($question);
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$ret = trim(fgets(STDIN));
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return $ret ? $ret : $default;
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// @codeCoverageIgnoreEnd
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}
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/**
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* Asks a confirmation to the user.
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*
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* The question will be asked until the user answer by nothing, yes, or no.
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*
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* @param OutputInterface $output
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* @param string|array $question The question to ask
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* @param Boolean $default The default answer if the user enters nothing
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*
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* @param Boolean true if the user has confirmed, false otherwise
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*/
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public function askConfirmation(OutputInterface $output, $question, $default = true)
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{
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// @codeCoverageIgnoreStart
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$answer = 'z';
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while ($answer && !in_array(strtolower($answer[0]), array('y', 'n')))
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{
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$answer = $this->ask($output, $question);
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}
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if (false === $default)
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{
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return $answer && 'y' == strtolower($answer[0]);
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}
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else
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{
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return !$answer || 'y' == strtolower($answer[0]);
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}
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// @codeCoverageIgnoreEnd
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}
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/**
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* Asks for a value and validates the response.
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*
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* @param OutputInterface $output
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* @param string|array $question
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* @param Closure $validator
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* @param integer $attempts Max number of times to ask before giving up (false by default, which means infinite)
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*
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* @return mixed
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*/
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public function askAndValidate(OutputInterface $output, $question, \Closure $validator, $attempts = false)
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{
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// @codeCoverageIgnoreStart
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$error = null;
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while (false === $attempts || $attempts--)
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{
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if (null !== $error)
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{
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$output->writeln($this->getHelperSet()->get('formatter')->formatBlock($error->getMessage(), 'error'));
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}
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$value = $this->ask($output, $question, null);
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try
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{
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return $validator($value);
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}
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catch (\Exception $error)
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{
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}
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}
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throw $error;
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// @codeCoverageIgnoreEnd
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}
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/**
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* Returns the helper's canonical name
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*/
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public function getName()
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{
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return 'dialog';
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}
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}
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