--- /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\InvalidArgumentException;
+use Symfony\Component\Console\Exception\RuntimeException;
+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 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 = $output->getErrorOutput();
+ }
+
+ if (!$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) {
+ $maxWidth = max(array_map(array($this, 'strlen'), array_keys($question->getChoices())));
+
+ $messages = (array) $question->getQuestion();
+ foreach ($question->getChoices() as $key => $value) {
+ $width = $maxWidth - $this->strlen($key);
+ $messages[] = ' [<info>'.$key.str_repeat(' ', $width).'</info>] '.$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
+ * @param resource $inputStream
+ *
+ * @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
+ * @param resource $inputStream The handler resource
+ *
+ * @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 $question A Question instance
+ *
+ * @return mixed The validated response
+ *
+ * @throws \Exception In case the max number of attempts has been reached and no valid response has been given
+ */
+ private function validateAttempts($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 (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('/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;
+ }
+}
projects / yaffs-website / blobdiff