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- 06.01.2017
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SymfonyQuestionHelper.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Console\Helper;
013
014 use Symfony\Component\Console\Exception\LogicException;
015 use Symfony\Component\Console\Input\InputInterface;
016 use Symfony\Component\Console\Output\OutputInterface;
017 use Symfony\Component\Console\Question\ChoiceQuestion;
018 use Symfony\Component\Console\Question\ConfirmationQuestion;
019 use Symfony\Component\Console\Question\Question;
020 use Symfony\Component\Console\Style\SymfonyStyle;
021 use Symfony\Component\Console\Formatter\OutputFormatter;
022
023 /**
024 * Symfony Style Guide compliant question helper.
025 *
026 * @author Kevin Bond <kevinbond@gmail.com>
027 */
028 class SymfonyQuestionHelper extends QuestionHelper
029 {
030 /**
031 * {@inheritdoc}
032 */
033 public function ask(InputInterface $input, OutputInterface $output, Question $question)
034 {
035 $validator = $question->getValidator();
036 $question->setValidator(function ($value) use ($validator) {
037 if (null !== $validator) {
038 $value = $validator($value);
039 } else {
040 // make required
041 if (!is_array($value) && !is_bool($value) && 0 === strlen($value)) {
042 throw new LogicException('A value is required.');
043 }
044 }
045
046 return $value;
047 });
048
049 return parent::ask($input, $output, $question);
050 }
051
052 /**
053 * {@inheritdoc}
054 */
055 protected function writePrompt(OutputInterface $output, Question $question)
056 {
057 $text = OutputFormatter::escape($question->getQuestion());
058 $default = $question->getDefault();
059
060 switch (true) {
061 case null === $default:
062 $text = sprintf(' <info>%s</info>:', $text);
063
064 break;
065
066 case $question instanceof ConfirmationQuestion:
067 $text = sprintf(' <info>%s (yes/no)</info> [<comment>%s</comment>]:', $text, $default ? 'yes' : 'no');
068
069 break;
070
071 case $question instanceof ChoiceQuestion && $question->isMultiselect():
072 $choices = $question->getChoices();
073 $default = explode(',', $default);
074
075 foreach ($default as $key => $value) {
076 $default[$key] = $choices[trim($value)];
077 }
078
079 $text = sprintf(' <info>%s</info> [<comment>%s</comment>]:', $text, OutputFormatter::escape(implode(', ', $default)));
080
081 break;
082
083 case $question instanceof ChoiceQuestion:
084 $choices = $question->getChoices();
085 $text = sprintf(' <info>%s</info> [<comment>%s</comment>]:', $text, OutputFormatter::escape($choices[$default]));
086
087 break;
088
089 default:
090 $text = sprintf(' <info>%s</info> [<comment>%s</comment>]:', $text, OutputFormatter::escape($default));
091 }
092
093 $output->writeln($text);
094
095 if ($question instanceof ChoiceQuestion) {
096 $width = max(array_map('strlen', array_keys($question->getChoices())));
097
098 foreach ($question->getChoices() as $key => $value) {
099 $output->writeln(sprintf(" [<comment>%-${width}s</comment>] %s", $key, $value));
100 }
101 }
102
103 $output->write(' > ');
104 }
105
106 /**
107 * {@inheritdoc}
108 */
109 protected function writeError(OutputInterface $output, \Exception $error)
110 {
111 if ($output instanceof SymfonyStyle) {
112 $output->newLine();
113 $output->error($error->getMessage());
114
115 return;
116 }
117
118 parent::writeError($output, $error);
119 }
120 }
121