Civi/Angular/Coder.php

   1 <?php
   2 namespace Civi\Angular;
   3
   4 class Coder {
   5
   6   /**
   7    *
   8    * Determine whether an HTML snippet remains consistent (through an
   9    * decode/encode loop).
  10    *
  11    * Note: Variations in whitespace are permitted.
  12    *
  13    * @param string $html
  14    * @return bool
  15    */
  16   public function checkConsistentHtml($html) {
  17     try {
  18       $recodedHtml = $this->recode($html);
  19     }
  20     catch (\Exception $e) {
  21       return FALSE;
  22     }
  23
  24     $htmlSig = preg_replace('/[ \t\r\n\/]+/', '', $this->cleanup($html));
  25     $docSig = preg_replace('/[ \t\r\n\/]+/', '', $recodedHtml);
  26     if ($htmlSig !== $docSig || empty($html) != empty($htmlSig)) {
  27       return FALSE;
  28     }
  29     return TRUE;
  30   }
  31
  32   /**
  33    * Parse an HTML snippet and re-encode is as HTML.
  34    *
  35    * This is useful for detecting cases where the parser or encoder
  36    * have quirks/bugs.
  37    *
  38    * @param string $html
  39    * @return string
  40    */
  41   public function recode($html) {
  42     $doc = \phpQuery::newDocument("$html", 'text/html');
  43     return $this->encode($doc);
  44   }
  45
  46   /**
  47    * Encode a phpQueryObject as HTML.
  48    *
  49    * @param \phpQueryObject $doc
  50    * @return string
  51    *   HTML
  52    */
  53   public function encode($doc) {
  54     $doc->document->formatOutput = TRUE;
  55     return $this->cleanup($doc->markupOuter());
  56   }
  57
  58   protected function cleanup($html) {
  59     $html = preg_replace_callback("/([\\-a-zA-Z0-9]+)=(')([^']*)(')/", array($this, 'cleanupAttribute'), $html);
  60     $html = preg_replace_callback('/([\-a-zA-Z0-9]+)=(")([^"]*)(")/', array($this, 'cleanupAttribute'), $html);
  61     return $html;
  62   }
  63
  64   protected function cleanupAttribute($matches) {
  65     list ($full, $attr, $lquote, $value, $rquote) = $matches;
  66
  67     switch ($attr) {
  68       case 'href':
  69         if (strpos($value, '%7B%7B') !== FALSE && strpos($value, '%7D%7D') !== FALSE) {
  70           $value = urldecode($value);
  71         }
  72         break;
  73
  74       default:
  75         $value = html_entity_decode($value);
  76         break;
  77     }
  78
  79     return "$attr=$lquote$value$rquote";
  80   }
  81
  82 }