--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Console\Helper;
+
+use Symfony\Component\Console\Exception\LogicException;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Question\ChoiceQuestion;
+use Symfony\Component\Console\Question\ConfirmationQuestion;
+use Symfony\Component\Console\Question\Question;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Console\Formatter\OutputFormatter;
+
+/**
+ * Symfony Style Guide compliant question helper.
+ *
+ * @author Kevin Bond <kevinbond@gmail.com>
+ */
+class SymfonyQuestionHelper extends QuestionHelper
+{
+ /**
+ * {@inheritdoc}
+ */
+ public function ask(InputInterface $input, OutputInterface $output, Question $question)
+ {
+ $validator = $question->getValidator();
+ $question->setValidator(function ($value) use ($validator) {
+ if (null !== $validator) {
+ $value = $validator($value);
+ } else {
+ // make required
+ if (!is_array($value) && !is_bool($value) && 0 === strlen($value)) {
+ throw new LogicException('A value is required.');
+ }
+ }
+
+ return $value;
+ });
+
+ return parent::ask($input, $output, $question);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function writePrompt(OutputInterface $output, Question $question)
+ {
+ $text = OutputFormatter::escapeTrailingBackslash($question->getQuestion());
+ $default = $question->getDefault();
+
+ switch (true) {
+ case null === $default:
+ $text = sprintf(' <info>%s</info>:', $text);
+
+ break;
+
+ case $question instanceof ConfirmationQuestion:
+ $text = sprintf(' <info>%s (yes/no)</info> [<comment>%s</comment>]:', $text, $default ? 'yes' : 'no');
+
+ break;
+
+ case $question instanceof ChoiceQuestion && $question->isMultiselect():
+ $choices = $question->getChoices();
+ $default = explode(',', $default);
+
+ foreach ($default as $key => $value) {
+ $default[$key] = $choices[trim($value)];
+ }
+
+ $text = sprintf(' <info>%s</info> [<comment>%s</comment>]:', $text, OutputFormatter::escape(implode(', ', $default)));
+
+ break;
+
+ case $question instanceof ChoiceQuestion:
+ $choices = $question->getChoices();
+ $text = sprintf(' <info>%s</info> [<comment>%s</comment>]:', $text, OutputFormatter::escape($choices[$default]));
+
+ break;
+
+ default:
+ $text = sprintf(' <info>%s</info> [<comment>%s</comment>]:', $text, OutputFormatter::escape($default));
+ }
+
+ $output->writeln($text);
+
+ if ($question instanceof ChoiceQuestion) {
+ $width = max(array_map('strlen', array_keys($question->getChoices())));
+
+ foreach ($question->getChoices() as $key => $value) {
+ $output->writeln(sprintf(" [<comment>%-${width}s</comment>] %s", $key, $value));
+ }
+ }
+
+ $output->write(' > ');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function writeError(OutputInterface $output, \Exception $error)
+ {
+ if ($output instanceof SymfonyStyle) {
+ $output->newLine();
+ $output->error($error->getMessage());
+
+ return;
+ }
+
+ parent::writeError($output, $error);
+ }
+}