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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\TemplateChecks;
   9  
  10  use DOMElement;
  11  use DOMXPath;
  12  use s9e\TextFormatter\Configurator\Exceptions\UnsafeTemplateException;
  13  use s9e\TextFormatter\Configurator\Items\Tag;
  14  use s9e\TextFormatter\Configurator\TemplateCheck;
  15  
  16  class DisallowElement extends TemplateCheck
  17  {
  18      /**
  19      * @var string Local name of the disallowed element
  20      */
  21      public $elName;
  22  
  23      /**
  24      * Constructor
  25      *
  26      * @param  string $elName Local name of the disallowed element
  27      */
  28  	public function __construct($elName)
  29      {
  30          // NOTE: the default template normalization rules force elements' names to be lowercase
  31          $this->elName = strtolower($elName);
  32      }
  33  
  34      /**
  35      * Test for the presence of an element of given name
  36      *
  37      * @param  DOMElement $template <xsl:template/> node
  38      * @param  Tag        $tag      Tag this template belongs to
  39      * @return void
  40      */
  41  	public function check(DOMElement $template, Tag $tag)
  42      {
  43          $xpath = new DOMXPath($template->ownerDocument);
  44          $query
  45              = '//*[translate(local-name(), "ABCDEFGHIJKLMNOPQRSTUVWXYZ", "abcdefghijklmnopqrstuvwxyz") = "' . $this->elName . '"]'
  46              . '|'
  47              . '//xsl:element[translate(@name,"ABCDEFGHIJKLMNOPQRSTUVWXYZ", "abcdefghijklmnopqrstuvwxyz") = "' . $this->elName . '"]';
  48  
  49          $node = $xpath->query($query)->item(0);
  50          if ($node)
  51          {
  52              throw new UnsafeTemplateException("Element '" . $this->elName . "' is disallowed", $node);
  53          }
  54      }
  55  }