<h2>File Contents: /home/planet5/public_html/tracking/vendor/symfony/console/Helper/QuestionHelper.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/public_html/tracking/vendor/symfony/console/Helper/QuestionHelper.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * 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\RuntimeException;
use Symfony\Component\Console\Formatter\OutputFormatter;
use Symfony\Component\Console\Formatter\OutputFormatterStyle;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\StreamableInputInterface;
use Symfony\Component\Console\Output\ConsoleOutputInterface;
use Symfony\Component\Console\Output\OutputInterface;
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 &lt;fabien@symfony.com&gt;
 */
class QuestionHelper extends Helper
{
    private $inputStream;
    private static $shell;
    private static $stty;

    /**
     * Asks a question to the user.
     *
     * @return mixed 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-&gt;getErrorOutput();
        }

        if (!$input-&gt;isInteractive()) {
            if ($question instanceof ChoiceQuestion) {
                $choices = $question-&gt;getChoices();

                return $choices[$question-&gt;getDefault()];
            }

            return $question-&gt;getDefault();
        }

        if ($input instanceof StreamableInputInterface &amp;&amp; $stream = $input-&gt;getStream()) {
            $this-&gt;inputStream = $stream;
        }

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

        $interviewer = function () use ($output, $question) {
            return $this-&gt;doAsk($output, $question);
        };

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

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return &#039;question&#039;;
    }

    /**
     * Prevents usage of stty.
     */
    public static function disableStty()
    {
        self::$stty = false;
    }

    /**
     * Asks the question to the user.
     *
     * @return bool|mixed|null|string
     *
     * @throws RuntimeException In case the fallback is deactivated and the response cannot be hidden
     */
    private function doAsk(OutputInterface $output, Question $question)
    {
        $this-&gt;writePrompt($output, $question);

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

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

            if (false === $ret) {
                $ret = fgets($inputStream, 4096);
                if (false === $ret) {
                    throw new RuntimeException(&#039;Aborted&#039;);
                }
                $ret = trim($ret);
            }
        } else {
            $ret = trim($this-&gt;autocomplete($output, $question, $inputStream, is_array($autocomplete) ? $autocomplete : iterator_to_array($autocomplete, false)));
        }

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

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

        return $ret;
    }

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

        if ($question instanceof ChoiceQuestion) {
            $maxWidth = max(array_map(array($this, &#039;strlen&#039;), array_keys($question-&gt;getChoices())));

            $messages = (array) $question-&gt;getQuestion();
            foreach ($question-&gt;getChoices() as $key =&gt; $value) {
                $width = $maxWidth - $this-&gt;strlen($key);
                $messages[] = &#039;  [&lt;info&gt;&#039;.$key.str_repeat(&#039; &#039;, $width).&#039;&lt;/info&gt;] &#039;.$value;
            }

            $output-&gt;writeln($messages);

            $message = $question-&gt;getPrompt();
        }

        $output-&gt;write($message);
    }

    /**
     * Outputs an error message.
     */
    protected function writeError(OutputInterface $output, \Exception $error)
    {
        if (null !== $this-&gt;getHelperSet() &amp;&amp; $this-&gt;getHelperSet()-&gt;has(&#039;formatter&#039;)) {
            $message = $this-&gt;getHelperSet()-&gt;get(&#039;formatter&#039;)-&gt;formatBlock($error-&gt;getMessage(), &#039;error&#039;);
        } else {
            $message = &#039;&lt;error&gt;&#039;.$error-&gt;getMessage().&#039;&lt;/error&gt;&#039;;
        }

        $output-&gt;writeln($message);
    }

    /**
     * Autocompletes a question.
     *
     * @param OutputInterface $output
     * @param Question        $question
     * @param resource        $inputStream
     */
    private function autocomplete(OutputInterface $output, Question $question, $inputStream, array $autocomplete): string
    {
        $ret = &#039;&#039;;

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

        $sttyMode = shell_exec(&#039;stty -g&#039;);

        // Disable icanon (so we can fread each keypress) and echo (we&#039;ll do echoing here instead)
        shell_exec(&#039;stty -icanon -echo&#039;);

        // Add highlighted text style
        $output-&gt;getFormatter()-&gt;setStyle(&#039;hl&#039;, new OutputFormatterStyle(&#039;black&#039;, &#039;white&#039;));

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

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

                if (0 === $i) {
                    $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 (&quot;\033&quot; === $c) {
                // Did we read an escape sequence?
                $c .= fread($inputStream, 2);

                // A = Up Arrow. B = Down Arrow
                if (isset($c[2]) &amp;&amp; (&#039;A&#039; === $c[2] || &#039;B&#039; === $c[2])) {
                    if (&#039;A&#039; === $c[2] &amp;&amp; -1 === $ofs) {
                        $ofs = 0;
                    }

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

                    $ofs += (&#039;A&#039; === $c[2]) ? -1 : 1;
                    $ofs = ($numMatches + $ofs) % $numMatches;
                }
            } elseif (ord($c) &lt; 32) {
                if (&quot;\t&quot; === $c || &quot;\n&quot; === $c) {
                    if ($numMatches &gt; 0 &amp;&amp; -1 !== $ofs) {
                        $ret = $matches[$ofs];
                        // Echo out remaining chars for current match
                        $output-&gt;write(substr($ret, $i));
                        $i = strlen($ret);
                    }

                    if (&quot;\n&quot; === $c) {
                        $output-&gt;write($c);
                        break;
                    }

                    $numMatches = 0;
                }

                continue;
            } else {
                $output-&gt;write($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) &amp;&amp; $i !== strlen($value)) {
                        $matches[$numMatches++] = $value;
                    }
                }
            }

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

            if ($numMatches &gt; 0 &amp;&amp; -1 !== $ofs) {
                // Save cursor position
                $output-&gt;write(&quot;\0337&quot;);
                // Write highlighted text
                $output-&gt;write(&#039;&lt;hl&gt;&#039;.OutputFormatter::escapeTrailingBackslash(substr($matches[$ofs], $i)).&#039;&lt;/hl&gt;&#039;);
                // Restore cursor position
                $output-&gt;write(&quot;\0338&quot;);
            }
        }

        // Reset stty so it behaves normally again
        shell_exec(sprintf(&#039;stty %s&#039;, $sttyMode));

        return $ret;
    }

    /**
     * Gets a hidden response from user.
     *
     * @param OutputInterface $output      An Output instance
     * @param resource        $inputStream The handler resource
     *
     * @throws RuntimeException In case the fallback is deactivated and the response cannot be hidden
     */
    private function getHiddenResponse(OutputInterface $output, $inputStream): string
    {
        if (&#039;\\&#039; === DIRECTORY_SEPARATOR) {
            $exe = __DIR__.&#039;/../Resources/bin/hiddeninput.exe&#039;;

            // handle code running from a phar
            if (&#039;phar:&#039; === substr(__FILE__, 0, 5)) {
                $tmpExe = sys_get_temp_dir().&#039;/hiddeninput.exe&#039;;
                copy($exe, $tmpExe);
                $exe = $tmpExe;
            }

            $value = rtrim(shell_exec($exe));
            $output-&gt;writeln(&#039;&#039;);

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

            return $value;
        }

        if ($this-&gt;hasSttyAvailable()) {
            $sttyMode = shell_exec(&#039;stty -g&#039;);

            shell_exec(&#039;stty -echo&#039;);
            $value = fgets($inputStream, 4096);
            shell_exec(sprintf(&#039;stty %s&#039;, $sttyMode));

            if (false === $value) {
                throw new RuntimeException(&#039;Aborted&#039;);
            }

            $value = trim($value);
            $output-&gt;writeln(&#039;&#039;);

            return $value;
        }

        if (false !== $shell = $this-&gt;getShell()) {
            $readCmd = &#039;csh&#039; === $shell ? &#039;set mypassword = $&lt;&#039; : &#039;read -r mypassword&#039;;
            $command = sprintf(&quot;/usr/bin/env %s -c &#039;stty -echo; %s; stty echo; echo \$mypassword&#039;&quot;, $shell, $readCmd);
            $value = rtrim(shell_exec($command));
            $output-&gt;writeln(&#039;&#039;);

            return $value;
        }

        throw new RuntimeException(&#039;Unable to hide the response.&#039;);
    }

    /**
     * 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 mixed 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(callable $interviewer, OutputInterface $output, Question $question)
    {
        $error = null;
        $attempts = $question-&gt;getMaxAttempts();
        while (null === $attempts || $attempts--) {
            if (null !== $error) {
                $this-&gt;writeError($output, $error);
            }

            try {
                return call_user_func($question-&gt;getValidator(), $interviewer());
            } catch (RuntimeException $e) {
                throw $e;
            } 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(&#039;/usr/bin/env&#039;)) {
            // handle other OSs with bash/zsh/ksh/csh if available to hide the answer
            $test = &quot;/usr/bin/env %s -c &#039;echo OK&#039; 2&gt; /dev/null&quot;;
            foreach (array(&#039;bash&#039;, &#039;zsh&#039;, &#039;ksh&#039;, &#039;csh&#039;) as $sh) {
                if (&#039;OK&#039; === rtrim(shell_exec(sprintf($test, $sh)))) {
                    self::$shell = $sh;
                    break;
                }
            }
        }

        return self::$shell;
    }

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

        exec(&#039;stty 2&gt;&amp;1&#039;, $output, $exitcode);

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