504 lines
19 KiB
PHP
504 lines
19 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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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 Symfony\Component\Console\Helper;
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use Symfony\Component\Console\Cursor;
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use Symfony\Component\Console\Exception\MissingInputException;
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use Symfony\Component\Console\Exception\RuntimeException;
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use Symfony\Component\Console\Formatter\OutputFormatter;
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use Symfony\Component\Console\Formatter\OutputFormatterStyle;
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use Symfony\Component\Console\Input\InputInterface;
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use Symfony\Component\Console\Input\StreamableInputInterface;
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use Symfony\Component\Console\Output\ConsoleOutputInterface;
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use Symfony\Component\Console\Output\ConsoleSectionOutput;
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use Symfony\Component\Console\Output\OutputInterface;
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use Symfony\Component\Console\Question\ChoiceQuestion;
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use Symfony\Component\Console\Question\Question;
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use Symfony\Component\Console\Terminal;
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use function Symfony\Component\String\s;
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/**
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* The QuestionHelper class provides helpers to interact with the user.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class QuestionHelper extends \Symfony\Component\Console\Helper\Helper
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{
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/**
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* @var resource|null
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*/
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private $inputStream;
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private static $stty = \true;
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private static $stdinIsInteractive;
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/**
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* Asks a question to the user.
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*
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* @return mixed The user answer
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*
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* @throws RuntimeException If there is no data to read in the input stream
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*/
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public function ask(InputInterface $input, OutputInterface $output, Question $question)
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{
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if ($output instanceof ConsoleOutputInterface) {
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$output = $output->getErrorOutput();
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}
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if (!$input->isInteractive()) {
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return $this->getDefaultAnswer($question);
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}
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if ($input instanceof StreamableInputInterface && ($stream = $input->getStream())) {
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$this->inputStream = $stream;
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}
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try {
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if (!$question->getValidator()) {
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return $this->doAsk($output, $question);
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}
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$interviewer = function () use($output, $question) {
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return $this->doAsk($output, $question);
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};
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return $this->validateAttempts($interviewer, $output, $question);
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} catch (MissingInputException $exception) {
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$input->setInteractive(\false);
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if (null === ($fallbackOutput = $this->getDefaultAnswer($question))) {
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throw $exception;
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}
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return $fallbackOutput;
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function getName()
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{
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return 'question';
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}
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/**
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* Prevents usage of stty.
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*/
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public static function disableStty()
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{
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self::$stty = \false;
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}
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/**
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* Asks the question to the user.
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*
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* @return mixed
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*
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* @throws RuntimeException In case the fallback is deactivated and the response cannot be hidden
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*/
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private function doAsk(OutputInterface $output, Question $question)
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{
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$this->writePrompt($output, $question);
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$inputStream = $this->inputStream ?: \STDIN;
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$autocomplete = $question->getAutocompleterCallback();
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if (null === $autocomplete || !self::$stty || !Terminal::hasSttyAvailable()) {
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$ret = \false;
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if ($question->isHidden()) {
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try {
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$hiddenResponse = $this->getHiddenResponse($output, $inputStream, $question->isTrimmable());
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$ret = $question->isTrimmable() ? \trim($hiddenResponse) : $hiddenResponse;
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} catch (RuntimeException $e) {
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if (!$question->isHiddenFallback()) {
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throw $e;
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}
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}
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}
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if (\false === $ret) {
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$isBlocked = \stream_get_meta_data($inputStream)['blocked'] ?? \true;
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if (!$isBlocked) {
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\stream_set_blocking($inputStream, \true);
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}
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$ret = $this->readInput($inputStream, $question);
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if (!$isBlocked) {
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\stream_set_blocking($inputStream, \false);
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}
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if (\false === $ret) {
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throw new MissingInputException('Aborted.');
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}
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if ($question->isTrimmable()) {
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$ret = \trim($ret);
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}
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}
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} else {
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$autocomplete = $this->autocomplete($output, $question, $inputStream, $autocomplete);
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$ret = $question->isTrimmable() ? \trim($autocomplete) : $autocomplete;
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}
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if ($output instanceof ConsoleSectionOutput) {
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$output->addContent($ret);
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}
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$ret = \strlen($ret) > 0 ? $ret : $question->getDefault();
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if ($normalizer = $question->getNormalizer()) {
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return $normalizer($ret);
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}
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return $ret;
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}
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/**
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* @return mixed
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*/
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private function getDefaultAnswer(Question $question)
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{
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$default = $question->getDefault();
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if (null === $default) {
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return $default;
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}
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if ($validator = $question->getValidator()) {
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return \call_user_func($question->getValidator(), $default);
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} elseif ($question instanceof ChoiceQuestion) {
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$choices = $question->getChoices();
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if (!$question->isMultiselect()) {
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return $choices[$default] ?? $default;
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}
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$default = \explode(',', $default);
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foreach ($default as $k => $v) {
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$v = $question->isTrimmable() ? \trim($v) : $v;
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$default[$k] = $choices[$v] ?? $v;
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}
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}
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return $default;
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}
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/**
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* Outputs the question prompt.
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*/
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protected function writePrompt(OutputInterface $output, Question $question)
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{
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$message = $question->getQuestion();
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if ($question instanceof ChoiceQuestion) {
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$output->writeln(\array_merge([$question->getQuestion()], $this->formatChoiceQuestionChoices($question, 'info')));
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$message = $question->getPrompt();
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}
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$output->write($message);
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}
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/**
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* @return string[]
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*/
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protected function formatChoiceQuestionChoices(ChoiceQuestion $question, string $tag)
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{
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$messages = [];
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$maxWidth = \max(\array_map([__CLASS__, 'width'], \array_keys($choices = $question->getChoices())));
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foreach ($choices as $key => $value) {
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$padding = \str_repeat(' ', $maxWidth - self::width($key));
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$messages[] = \sprintf(" [<{$tag}>%s{$padding}</{$tag}>] %s", $key, $value);
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}
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return $messages;
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}
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/**
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* Outputs an error message.
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*/
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protected function writeError(OutputInterface $output, \Exception $error)
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{
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if (null !== $this->getHelperSet() && $this->getHelperSet()->has('formatter')) {
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$message = $this->getHelperSet()->get('formatter')->formatBlock($error->getMessage(), 'error');
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} else {
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$message = '<error>' . $error->getMessage() . '</error>';
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}
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$output->writeln($message);
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}
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/**
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* Autocompletes a question.
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*
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* @param resource $inputStream
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*/
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private function autocomplete(OutputInterface $output, Question $question, $inputStream, callable $autocomplete) : string
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{
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$cursor = new Cursor($output, $inputStream);
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$fullChoice = '';
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$ret = '';
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$i = 0;
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$ofs = -1;
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$matches = $autocomplete($ret);
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$numMatches = \count($matches);
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$sttyMode = \shell_exec('stty -g');
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$isStdin = 'php://stdin' === (\stream_get_meta_data($inputStream)['uri'] ?? null);
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$r = [$inputStream];
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$w = [];
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// Disable icanon (so we can fread each keypress) and echo (we'll do echoing here instead)
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\shell_exec('stty -icanon -echo');
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// Add highlighted text style
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$output->getFormatter()->setStyle('hl', new OutputFormatterStyle('black', 'white'));
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// Read a keypress
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while (!\feof($inputStream)) {
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while ($isStdin && 0 === @\stream_select($r, $w, $w, 0, 100)) {
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// Give signal handlers a chance to run
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$r = [$inputStream];
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}
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$c = \fread($inputStream, 1);
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// as opposed to fgets(), fread() returns an empty string when the stream content is empty, not false.
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if (\false === $c || '' === $ret && '' === $c && null === $question->getDefault()) {
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\shell_exec('stty ' . $sttyMode);
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throw new MissingInputException('Aborted.');
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} elseif ("" === $c) {
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// Backspace Character
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if (0 === $numMatches && 0 !== $i) {
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--$i;
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$cursor->moveLeft(s($fullChoice)->slice(-1)->width(\false));
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$fullChoice = self::substr($fullChoice, 0, $i);
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}
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if (0 === $i) {
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$ofs = -1;
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$matches = $autocomplete($ret);
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$numMatches = \count($matches);
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} else {
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$numMatches = 0;
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}
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// Pop the last character off the end of our string
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$ret = self::substr($ret, 0, $i);
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} elseif ("\x1b" === $c) {
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// Did we read an escape sequence?
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$c .= \fread($inputStream, 2);
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// A = Up Arrow. B = Down Arrow
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if (isset($c[2]) && ('A' === $c[2] || 'B' === $c[2])) {
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if ('A' === $c[2] && -1 === $ofs) {
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$ofs = 0;
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}
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if (0 === $numMatches) {
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continue;
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}
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$ofs += 'A' === $c[2] ? -1 : 1;
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$ofs = ($numMatches + $ofs) % $numMatches;
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}
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} elseif (\ord($c) < 32) {
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if ("\t" === $c || "\n" === $c) {
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if ($numMatches > 0 && -1 !== $ofs) {
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$ret = (string) $matches[$ofs];
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// Echo out remaining chars for current match
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$remainingCharacters = \substr($ret, \strlen(\trim($this->mostRecentlyEnteredValue($fullChoice))));
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$output->write($remainingCharacters);
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$fullChoice .= $remainingCharacters;
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$i = \false === ($encoding = \mb_detect_encoding($fullChoice, null, \true)) ? \strlen($fullChoice) : \mb_strlen($fullChoice, $encoding);
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$matches = \array_filter($autocomplete($ret), function ($match) use($ret) {
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return '' === $ret || \str_starts_with($match, $ret);
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});
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$numMatches = \count($matches);
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$ofs = -1;
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}
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if ("\n" === $c) {
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$output->write($c);
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break;
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}
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$numMatches = 0;
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}
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continue;
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} else {
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if ("\x80" <= $c) {
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$c .= \fread($inputStream, ["\xc0" => 1, "\xd0" => 1, "\xe0" => 2, "\xf0" => 3][$c & "\xf0"]);
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}
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$output->write($c);
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$ret .= $c;
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$fullChoice .= $c;
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++$i;
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$tempRet = $ret;
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if ($question instanceof ChoiceQuestion && $question->isMultiselect()) {
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$tempRet = $this->mostRecentlyEnteredValue($fullChoice);
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}
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$numMatches = 0;
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$ofs = 0;
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foreach ($autocomplete($ret) as $value) {
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// If typed characters match the beginning chunk of value (e.g. [AcmeDe]moBundle)
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if (\str_starts_with($value, $tempRet)) {
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$matches[$numMatches++] = $value;
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}
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}
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}
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$cursor->clearLineAfter();
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if ($numMatches > 0 && -1 !== $ofs) {
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$cursor->savePosition();
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// Write highlighted text, complete the partially entered response
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$charactersEntered = \strlen(\trim($this->mostRecentlyEnteredValue($fullChoice)));
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$output->write('<hl>' . OutputFormatter::escapeTrailingBackslash(\substr($matches[$ofs], $charactersEntered)) . '</hl>');
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$cursor->restorePosition();
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}
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}
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// Reset stty so it behaves normally again
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\shell_exec('stty ' . $sttyMode);
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return $fullChoice;
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}
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private function mostRecentlyEnteredValue(string $entered) : string
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{
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// Determine the most recent value that the user entered
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if (!\str_contains($entered, ',')) {
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return $entered;
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}
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$choices = \explode(',', $entered);
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if ('' !== ($lastChoice = \trim($choices[\count($choices) - 1]))) {
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return $lastChoice;
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}
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return $entered;
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}
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/**
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* Gets a hidden response from user.
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*
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* @param resource $inputStream The handler resource
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* @param bool $trimmable Is the answer trimmable
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*
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* @throws RuntimeException In case the fallback is deactivated and the response cannot be hidden
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*/
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private function getHiddenResponse(OutputInterface $output, $inputStream, bool $trimmable = \true) : string
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{
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if ('\\' === \DIRECTORY_SEPARATOR) {
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$exe = __DIR__ . '/../Resources/bin/hiddeninput.exe';
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// handle code running from a phar
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if ('phar:' === \substr(__FILE__, 0, 5)) {
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$tmpExe = \sys_get_temp_dir() . '/hiddeninput.exe';
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\copy($exe, $tmpExe);
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$exe = $tmpExe;
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}
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$sExec = \shell_exec('"' . $exe . '"');
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$value = $trimmable ? \rtrim($sExec) : $sExec;
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$output->writeln('');
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if (isset($tmpExe)) {
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\unlink($tmpExe);
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}
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return $value;
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}
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if (self::$stty && Terminal::hasSttyAvailable()) {
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$sttyMode = \shell_exec('stty -g');
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\shell_exec('stty -echo');
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} elseif ($this->isInteractiveInput($inputStream)) {
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throw new RuntimeException('Unable to hide the response.');
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}
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$value = \fgets($inputStream, 4096);
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if (self::$stty && Terminal::hasSttyAvailable()) {
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\shell_exec('stty ' . $sttyMode);
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}
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if (\false === $value) {
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throw new MissingInputException('Aborted.');
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}
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if ($trimmable) {
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$value = \trim($value);
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}
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$output->writeln('');
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return $value;
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}
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/**
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* Validates an attempt.
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*
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* @param callable $interviewer A callable that will ask for a question and return the result
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*
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* @return mixed The validated response
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*
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* @throws \Exception In case the max number of attempts has been reached and no valid response has been given
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*/
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private function validateAttempts(callable $interviewer, OutputInterface $output, Question $question)
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{
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$error = null;
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$attempts = $question->getMaxAttempts();
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while (null === $attempts || $attempts--) {
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if (null !== $error) {
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$this->writeError($output, $error);
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}
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try {
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return $question->getValidator()($interviewer());
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} catch (RuntimeException $e) {
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throw $e;
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} catch (\Exception $error) {
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}
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}
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throw $error;
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}
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private function isInteractiveInput($inputStream) : bool
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{
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if ('php://stdin' !== (\stream_get_meta_data($inputStream)['uri'] ?? null)) {
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return \false;
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}
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if (null !== self::$stdinIsInteractive) {
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return self::$stdinIsInteractive;
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}
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return self::$stdinIsInteractive = @\stream_isatty(\fopen('php://stdin', 'r'));
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}
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/**
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* Reads one or more lines of input and returns what is read.
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*
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* @param resource $inputStream The handler resource
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* @param Question $question The question being asked
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*
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* @return string|false The input received, false in case input could not be read
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*/
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private function readInput($inputStream, Question $question)
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{
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if (!$question->isMultiline()) {
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$cp = $this->setIOCodepage();
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$ret = \fgets($inputStream, 4096);
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return $this->resetIOCodepage($cp, $ret);
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}
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$multiLineStreamReader = $this->cloneInputStream($inputStream);
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if (null === $multiLineStreamReader) {
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return \false;
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}
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$ret = '';
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$cp = $this->setIOCodepage();
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while (\false !== ($char = \fgetc($multiLineStreamReader))) {
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if (\PHP_EOL === "{$ret}{$char}") {
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break;
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}
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$ret .= $char;
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}
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return $this->resetIOCodepage($cp, $ret);
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}
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/**
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* Sets console I/O to the host code page.
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*
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* @return int Previous code page in IBM/EBCDIC format
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*/
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private function setIOCodepage() : int
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{
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if (\function_exists('sapi_windows_cp_set')) {
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$cp = \sapi_windows_cp_get();
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\sapi_windows_cp_set(\sapi_windows_cp_get('oem'));
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return $cp;
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}
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return 0;
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}
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/**
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* Sets console I/O to the specified code page and converts the user input.
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*
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* @param string|false $input
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*
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* @return string|false
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*/
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private function resetIOCodepage(int $cp, $input)
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{
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if (0 !== $cp) {
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\sapi_windows_cp_set($cp);
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if (\false !== $input && '' !== $input) {
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$input = \sapi_windows_cp_conv(\sapi_windows_cp_get('oem'), $cp, $input);
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}
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}
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return $input;
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}
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/**
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* Clones an input stream in order to act on one instance of the same
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* stream without affecting the other instance.
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*
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* @param resource $inputStream The handler resource
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*
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* @return resource|null The cloned resource, null in case it could not be cloned
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*/
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private function cloneInputStream($inputStream)
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{
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$streamMetaData = \stream_get_meta_data($inputStream);
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$seekable = $streamMetaData['seekable'] ?? \false;
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$mode = $streamMetaData['mode'] ?? 'rb';
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$uri = $streamMetaData['uri'] ?? null;
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if (null === $uri) {
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return null;
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}
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$cloneStream = \fopen($uri, $mode);
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// For seekable and writable streams, add all the same data to the
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// cloned stream and then seek to the same offset.
|
||
if (\true === $seekable && !\in_array($mode, ['r', 'rb', 'rt'])) {
|
||
$offset = \ftell($inputStream);
|
||
\rewind($inputStream);
|
||
\stream_copy_to_stream($inputStream, $cloneStream);
|
||
\fseek($inputStream, $offset);
|
||
\fseek($cloneStream, $offset);
|
||
}
|
||
return $cloneStream;
|
||
}
|
||
}
|