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   1  <?php
   2  
   3  /**
   4  * @package   s9e\TextFormatter
   5  * @copyright Copyright (c) 2010-2022 The s9e authors
   6  * @license   http://www.opensource.org/licenses/mit-license.php The MIT License
   7  */
   8  namespace s9e\TextFormatter\Configurator\Collections;
   9  
  10  use InvalidArgumentException;
  11  use s9e\TextFormatter\Configurator\Helpers\RegexpBuilder;
  12  use s9e\TextFormatter\Configurator\Items\Regexp;
  13  
  14  class SchemeList extends NormalizedList
  15  {
  16      /**
  17      * Return this scheme list as a regexp
  18      *
  19      * @return Regexp
  20      */
  21  	public function asConfig()
  22      {
  23          return new Regexp('/^' . RegexpBuilder::fromList($this->items) . '$/Di');
  24      }
  25  
  26      /**
  27      * Validate and normalize a scheme name to lowercase, or throw an exception if invalid
  28      *
  29      * @link http://tools.ietf.org/html/rfc3986#section-3.1
  30      *
  31      * @param  string $scheme URL scheme, e.g. "file" or "ed2k"
  32      * @return string
  33      */
  34  	public function normalizeValue($scheme)
  35      {
  36          if (!preg_match('#^[a-z][a-z0-9+\\-.]*$#Di', $scheme))
  37          {
  38              throw new InvalidArgumentException("Invalid scheme name '" . $scheme . "'");
  39          }
  40  
  41          return strtolower($scheme);
  42      }
  43  }