Professor6T9 Web SheLL

Windows NT WEB-23 10.0 build 17763 (Windows Server 2016) i586
Microsoft-IIS/10.0
103.118.16.173

File Name : QuestionHelper.php

<?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\Input\InputInterface;
use Symfony\Component\Console\Output\ConsoleOutputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Formatter\OutputFormatterStyle;
use Symfony\Component\Console\Question\Question;
use Symfony\Component\Console\Question\ChoiceQuestion;

/**
 * The QuestionHelper class provides helpers to interact with the user.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class QuestionHelper extends Helper
{
    private $inputStream;
    private static $shell;
    private static $stty;

/**
     * Asks a question to the user.
     *
     * @param InputInterface  $input    An InputInterface instance
     * @param OutputInterface $output   An OutputInterface instance
     * @param Question        $question The question to ask
     *
     * @return string The user answer
     *
     * @throws \RuntimeException If there is no data to read in the input stream
     */
    public function ask(InputInterface $input, OutputInterface $output, Question $question)
    {
        if ($output instanceof ConsoleOutputInterface) {
            $output = $output->getErrorOutput();
        }

if (!$input->isInteractive()) {
            return $question->getDefault();
        }

if (!$question->getValidator()) {
            return $this->doAsk($output, $question);
        }

$that = $this;

$interviewer = function () use ($output, $question, $that) {
            return $that->doAsk($output, $question);
        };

return $this->validateAttempts($interviewer, $output, $question);
    }

/**
     * Sets the input stream to read from when interacting with the user.
     *
     * This is mainly useful for testing purpose.
     *
     * @param resource $stream The input stream
     *
     * @throws \InvalidArgumentException In case the stream is not a resource
     */
    public function setInputStream($stream)
    {
        if (!is_resource($stream)) {
            throw new \InvalidArgumentException('Input stream must be a valid resource.');
        }

$this->inputStream = $stream;
    }

/**
     * Returns the helper's input stream.
     *
     * @return resource
     */
    public function getInputStream()
    {
        return $this->inputStream;
    }

/**
     * {@inheritdoc}
     */
    public function getName()
    {
        return 'question';
    }

/**
     * Asks the question to the user.
     *
     * This method is public for PHP 5.3 compatibility, it should be private.
     *
     * @param OutputInterface $output
     * @param Question        $question
     *
     * @return bool|mixed|null|string
     *
     * @throws \Exception
     * @throws \RuntimeException
     */
    public function doAsk(OutputInterface $output, Question $question)
    {
        $this->writePrompt($output, $question);

$inputStream = $this->inputStream ?: STDIN;
        $autocomplete = $question->getAutocompleterValues();

if (null === $autocomplete || !$this->hasSttyAvailable()) {
            $ret = false;
            if ($question->isHidden()) {
                try {
                    $ret = trim($this->getHiddenResponse($output, $inputStream));
                } catch (\RuntimeException $e) {
                    if (!$question->isHiddenFallback()) {
                        throw $e;
                    }
                }
            }

if (false === $ret) {
                $ret = fgets($inputStream, 4096);
                if (false === $ret) {
                    throw new \RuntimeException('Aborted');
                }
                $ret = trim($ret);
            }
        } else {
            $ret = trim($this->autocomplete($output, $question, $inputStream));
        }

$ret = strlen($ret) > 0 ? $ret : $question->getDefault();

if ($normalizer = $question->getNormalizer()) {
            return $normalizer($ret);
        }

return $ret;
    }

/**
     * Outputs the question prompt.
     *
     * @param OutputInterface $output
     * @param Question        $question
     */
    protected function writePrompt(OutputInterface $output, Question $question)
    {
        $message = $question->getQuestion();

if ($question instanceof ChoiceQuestion) {
            $width = max(array_map('strlen', array_keys($question->getChoices())));

$messages = (array) $question->getQuestion();
            foreach ($question->getChoices() as $key => $value) {
                $messages[] = sprintf("  [<info>%-${width}s</info>] %s", $key, $value);
            }

$output->writeln($messages);

$message = $question->getPrompt();
        }

$output->write($message);
    }

/**
     * Outputs an error message.
     *
     * @param OutputInterface $output
     * @param \Exception      $error
     */
    protected function writeError(OutputInterface $output, \Exception $error)
    {
        if (null !== $this->getHelperSet() && $this->getHelperSet()->has('formatter')) {
            $message = $this->getHelperSet()->get('formatter')->formatBlock($error->getMessage(), 'error');
        } else {
            $message = '<error>'.$error->getMessage().'</error>';
        }

$output->writeln($message);
    }

/**
     * Autocompletes a question.
     *
     * @param OutputInterface $output
     * @param Question        $question
     *
     * @return string
     */
    private function autocomplete(OutputInterface $output, Question $question, $inputStream)
    {
        $autocomplete = $question->getAutocompleterValues();
        $ret = '';

$i = 0;
        $ofs = -1;
        $matches = $autocomplete;
        $numMatches = count($matches);

$sttyMode = shell_exec('stty -g');

// Disable icanon (so we can fread each keypress) and echo (we'll do echoing here instead)
        shell_exec('stty -icanon -echo');

// Add highlighted text style
        $output->getFormatter()->setStyle('hl', new OutputFormatterStyle('black', 'white'));

// Read a keypress
        while (!feof($inputStream)) {
            $c = fread($inputStream, 1);

// Backspace Character
            if ("\177" === $c) {
                if (0 === $numMatches && 0 !== $i) {
                    --$i;
                    // Move cursor backwards
                    $output->write("\033[1D");
                }

if ($i === 0) {
                    $ofs = -1;
                    $matches = $autocomplete;
                    $numMatches = count($matches);
                } else {
                    $numMatches = 0;
                }

// Pop the last character off the end of our string
                $ret = substr($ret, 0, $i);
            } elseif ("\033" === $c) {
                // Did we read an escape sequence?
                $c .= fread($inputStream, 2);

// A = Up Arrow. B = Down Arrow
                if (isset($c[2]) && ('A' === $c[2] || 'B' === $c[2])) {
                    if ('A' === $c[2] && -1 === $ofs) {
                        $ofs = 0;
                    }

if (0 === $numMatches) {
                        continue;
                    }

$ofs += ('A' === $c[2]) ? -1 : 1;
                    $ofs = ($numMatches + $ofs) % $numMatches;
                }
            } elseif (ord($c) < 32) {
                if ("\t" === $c || "\n" === $c) {
                    if ($numMatches > 0 && -1 !== $ofs) {
                        $ret = $matches[$ofs];
                        // Echo out remaining chars for current match
                        $output->write(substr($ret, $i));
                        $i = strlen($ret);
                    }

if ("\n" === $c) {
                        $output->write($c);
                        break;
                    }

$numMatches = 0;
                }

continue;
            } else {
                $output->write($c);
                $ret .= $c;
                ++$i;

$numMatches = 0;
                $ofs = 0;

foreach ($autocomplete as $value) {
                    // If typed characters match the beginning chunk of value (e.g. [AcmeDe]moBundle)
                    if (0 === strpos($value, $ret) && $i !== strlen($value)) {
                        $matches[$numMatches++] = $value;
                    }
                }
            }

// Erase characters from cursor to end of line
            $output->write("\033[K");

if ($numMatches > 0 && -1 !== $ofs) {
                // Save cursor position
                $output->write("\0337");
                // Write highlighted text
                $output->write('<hl>'.substr($matches[$ofs], $i).'</hl>');
                // Restore cursor position
                $output->write("\0338");
            }
        }

// Reset stty so it behaves normally again
        shell_exec(sprintf('stty %s', $sttyMode));

return $ret;
    }

/**
     * Gets a hidden response from user.
     *
     * @param OutputInterface $output An Output instance
     *
     * @return string The answer
     *
     * @throws \RuntimeException In case the fallback is deactivated and the response cannot be hidden
     */
    private function getHiddenResponse(OutputInterface $output, $inputStream)
    {
        if ('\\' === DIRECTORY_SEPARATOR) {
            $exe = __DIR__.'/../Resources/bin/hiddeninput.exe';

// handle code running from a phar
            if ('phar:' === substr(__FILE__, 0, 5)) {
                $tmpExe = sys_get_temp_dir().'/hiddeninput.exe';
                copy($exe, $tmpExe);
                $exe = $tmpExe;
            }

$value = rtrim(shell_exec($exe));
            $output->writeln('');

if (isset($tmpExe)) {
                unlink($tmpExe);
            }

return $value;
        }

if ($this->hasSttyAvailable()) {
            $sttyMode = shell_exec('stty -g');

shell_exec('stty -echo');
            $value = fgets($inputStream, 4096);
            shell_exec(sprintf('stty %s', $sttyMode));

if (false === $value) {
                throw new \RuntimeException('Aborted');
            }

$value = trim($value);
            $output->writeln('');

return $value;
        }

if (false !== $shell = $this->getShell()) {
            $readCmd = $shell === 'csh' ? 'set mypassword = $<' : 'read -r mypassword';
            $command = sprintf("/usr/bin/env %s -c 'stty -echo; %s; stty echo; echo \$mypassword'", $shell, $readCmd);
            $value = rtrim(shell_exec($command));
            $output->writeln('');

return $value;
        }

throw new \RuntimeException('Unable to hide the response.');
    }

/**
     * Validates an attempt.
     *
     * @param callable        $interviewer A callable that will ask for a question and return the result
     * @param OutputInterface $output      An Output instance
     * @param Question        $question    A Question instance
     *
     * @return string The validated response
     *
     * @throws \Exception In case the max number of attempts has been reached and no valid response has been given
     */
    private function validateAttempts($interviewer, OutputInterface $output, Question $question)
    {
        $error = null;
        $attempts = $question->getMaxAttempts();
        while (null === $attempts || $attempts--) {
            if (null !== $error) {
                $this->writeError($output, $error);
            }

try {
                return call_user_func($question->getValidator(), $interviewer());
            } catch (\Exception $error) {
            }
        }

throw $error;
    }

/**
     * Returns a valid unix shell.
     *
     * @return string|bool The valid shell name, false in case no valid shell is found
     */
    private function getShell()
    {
        if (null !== self::$shell) {
            return self::$shell;
        }

self::$shell = false;

if (file_exists('/usr/bin/env')) {
            // handle other OSs with bash/zsh/ksh/csh if available to hide the answer
            $test = "/usr/bin/env %s -c 'echo OK' 2> /dev/null";
            foreach (array('bash', 'zsh', 'ksh', 'csh') as $sh) {
                if ('OK' === rtrim(shell_exec(sprintf($test, $sh)))) {
                    self::$shell = $sh;
                    break;
                }
            }
        }

return self::$shell;
    }

/**
     * Returns whether Stty is available or not.
     *
     * @return bool
     */
    private function hasSttyAvailable()
    {
        if (null !== self::$stty) {
            return self::$stty;
        }

exec('stty 2>&1', $output, $exitcode);

return self::$stty = $exitcode === 0;
    }
}

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	0/0	0777	2020-04-18 04:05:17
..	dir	-	0/0	0777	2020-04-18 04:05:02
DebugFormatterHelper.php	text/x-php	4.08 KB	0/0	0666	2015-11-19 07:32:15
DescriptorHelper.php	text/x-php	2.53 KB	0/0	0666	2015-11-19 07:32:15
DialogHelper.php	text/x-php	16.57 KB	0/0	0666	2015-11-19 07:32:15
FormatterHelper.php	text/x-php	2.27 KB	0/0	0666	2015-11-19 07:32:15
Helper.php	text/x-php	3.07 KB	0/0	0666	2015-11-19 07:32:15
HelperInterface.php	text/x-php	943 B	0/0	0666	2015-11-19 07:32:15
HelperSet.php	text/x-php	3.37 KB	0/0	0666	2015-11-19 07:32:15
InputAwareHelper.php	text/x-php	747 B	0/0	0666	2015-11-19 07:32:15
ProcessHelper.php	text/x-php	5 KB	0/0	0666	2015-11-19 07:32:15
ProgressBar.php	text/x-php	17.72 KB	0/0	0666	2015-11-19 07:32:15
ProgressHelper.php	text/x-php	12.14 KB	0/0	0666	2015-11-19 07:32:15
QuestionHelper.php	text/x-php	12.98 KB	0/0	0666	2015-11-19 07:32:15
SymfonyQuestionHelper.php	text/x-php	3.01 KB	0/0	0666	2015-11-19 07:32:15
Table.php	text/x-php	16.78 KB	0/0	0666	2015-11-19 07:32:15
TableCell.php	text/x-php	1.52 KB	0/0	0666	2015-11-19 07:32:15
TableHelper.php	text/x-php	6.05 KB	0/0	0666	2015-11-19 07:32:15
TableSeparator.php	text/x-php	610 B	0/0	0666	2015-11-19 07:32:15
TableStyle.php	text/x-php	5.06 KB	0/0	0666	2015-11-19 07:32:15

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