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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <[email protected]>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\Console\Input;
  13  
  14  use Symfony\Component\Console\Exception\InvalidArgumentException;
  15  
  16  /**
  17   * StringInput represents an input provided as a string.
  18   *
  19   * Usage:
  20   *
  21   *     $input = new StringInput('foo --bar="foobar"');
  22   *
  23   * @author Fabien Potencier <[email protected]>
  24   */
  25  class StringInput extends ArgvInput
  26  {
  27      public const REGEX_STRING = '([^\s]+?)(?:\s|(?<!\\\\)"|(?<!\\\\)\'|$)';
  28      public const REGEX_UNQUOTED_STRING = '([^\s\\\\]+?)';
  29      public const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\')';
  30  
  31      /**
  32       * @param string $input A string representing the parameters from the CLI
  33       */
  34      public function __construct(string $input)
  35      {
  36          parent::__construct([]);
  37  
  38          $this->setTokens($this->tokenize($input));
  39      }
  40  
  41      /**
  42       * Tokenizes a string.
  43       *
  44       * @throws InvalidArgumentException When unable to parse input (should never happen)
  45       */
  46      private function tokenize(string $input): array
  47      {
  48          $tokens = [];
  49          $length = \strlen($input);
  50          $cursor = 0;
  51          $token = null;
  52          while ($cursor < $length) {
  53              if ('\\' === $input[$cursor]) {
  54                  $token .= $input[++$cursor] ?? '';
  55                  ++$cursor;
  56                  continue;
  57              }
  58  
  59              if (preg_match('/\s+/A', $input, $match, 0, $cursor)) {
  60                  if (null !== $token) {
  61                      $tokens[] = $token;
  62                      $token = null;
  63                  }
  64              } elseif (preg_match('/([^="\'\s]+?)(=?)('.self::REGEX_QUOTED_STRING.'+)/A', $input, $match, 0, $cursor)) {
  65                  $token .= $match[1].$match[2].stripcslashes(str_replace(['"\'', '\'"', '\'\'', '""'], '', substr($match[3], 1, -1)));
  66              } elseif (preg_match('/'.self::REGEX_QUOTED_STRING.'/A', $input, $match, 0, $cursor)) {
  67                  $token .= stripcslashes(substr($match[0], 1, -1));
  68              } elseif (preg_match('/'.self::REGEX_UNQUOTED_STRING.'/A', $input, $match, 0, $cursor)) {
  69                  $token .= $match[1];
  70              } else {
  71                  // should never happen
  72                  throw new InvalidArgumentException(sprintf('Unable to parse input near "... %s ...".', substr($input, $cursor, 10)));
  73              }
  74  
  75              $cursor += \strlen($match[0]);
  76          }
  77  
  78          if (null !== $token) {
  79              $tokens[] = $token;
  80          }
  81  
  82          return $tokens;
  83      }
  84  }