First commit

sites/all/modules/civicrm/Civi/Angular/Coder.php

@@ -0,0 +1,82 @@
+<?php
+namespace Civi\Angular;
+
+class Coder {
+
+  /**
+   *
+   * Determine whether an HTML snippet remains consistent (through an
+   * decode/encode loop).
+   *
+   * Note: Variations in whitespace are permitted.
+   *
+   * @param string $html
+   * @return bool
+   */
+  public function checkConsistentHtml($html) {
+    try {
+      $recodedHtml = $this->recode($html);
+    }
+    catch (\Exception $e) {
+      return FALSE;
+    }
+
+    $htmlSig = preg_replace('/[ \t\r\n\/]+/', '', $this->cleanup($html));
+    $docSig = preg_replace('/[ \t\r\n\/]+/', '', $recodedHtml);
+    if ($htmlSig !== $docSig || empty($html) != empty($htmlSig)) {
+      return FALSE;
+    }
+    return TRUE;
+  }
+
+  /**
+   * Parse an HTML snippet and re-encode is as HTML.
+   *
+   * This is useful for detecting cases where the parser or encoder
+   * have quirks/bugs.
+   *
+   * @param string $html
+   * @return string
+   */
+  public function recode($html) {
+    $doc = \phpQuery::newDocument("$html", 'text/html');
+    return $this->encode($doc);
+  }
+
+  /**
+   * Encode a phpQueryObject as HTML.
+   *
+   * @param \phpQueryObject $doc
+   * @return string
+   *   HTML
+   */
+  public function encode($doc) {
+    $doc->document->formatOutput = TRUE;
+    return $this->cleanup($doc->markupOuter());
+  }
+
+  protected function cleanup($html) {
+    $html = preg_replace_callback("/([\\-a-zA-Z0-9]+)=(')([^']*)(')/", array($this, 'cleanupAttribute'), $html);
+    $html = preg_replace_callback('/([\-a-zA-Z0-9]+)=(")([^"]*)(")/', array($this, 'cleanupAttribute'), $html);
+    return $html;
+  }
+
+  protected function cleanupAttribute($matches) {
+    list ($full, $attr, $lquote, $value, $rquote) = $matches;
+
+    switch ($attr) {
+      case 'href':
+        if (strpos($value, '%7B%7B') !== FALSE && strpos($value, '%7D%7D') !== FALSE) {
+          $value = urldecode($value);
+        }
+        break;
+
+      default:
+        $value = html_entity_decode($value);
+        break;
+    }
+
+    return "$attr=$lquote$value$rquote";
+  }
+
+}