1 files changed, 39 insertions, 0 deletions
diff --git a/lib/htmlpurifier/library/HTMLPurifier/Filter/YouTube.php b/lib/htmlpurifier/library/HTMLPurifier/Filter/YouTube.php
new file mode 100755
index 000000000..aca972f6c
--- /dev/null
+++ b/lib/htmlpurifier/library/HTMLPurifier/Filter/YouTube.php
@@ -0,0 +1,39 @@
+<?php
+
+class HTMLPurifier_Filter_YouTube extends HTMLPurifier_Filter
+{
+
+    public $name = 'YouTube';
+
+    public function preFilter($html, $config, $context) {
+        $pre_regex = '#<object[^>]+>.+?'.
+            'http://www.youtube.com/v/([A-Za-z0-9\-_]+).+?</object>#s';
+        $pre_replace = '<span class="youtube-embed">\1</span>';
+        return preg_replace($pre_regex, $pre_replace, $html);
+    }
+
+    public function postFilter($html, $config, $context) {
+        $post_regex = '#<span class="youtube-embed">([A-Za-z0-9\-_]+)</span>#';
+        return preg_replace_callback($post_regex, array($this, 'postFilterCallback'), $html);
+    }
+
+    protected function armorUrl($url) {
+        return str_replace('--', '-&#45;', $url);
+    }
+
+    protected function postFilterCallback($matches) {
+        $url = $this->armorUrl($matches[1]);
+        return '<object width="425" height="350" type="application/x-shockwave-flash" '.
+            'data="http://www.youtube.com/v/'.$url.'">'.
+            '<param name="movie" value="http://www.youtube.com/v/'.$url.'"></param>'.
+            '<!--[if IE]>'.
+            '<embed src="http://www.youtube.com/v/'.$url.'"'.
+            'type="application/x-shockwave-flash"'.
+            'wmode="transparent" width="425" height="350" />'.
+            '<![endif]-->'.
+            '</object>';
+
+    }
+}
+
+// vim: et sw=4 sts=4