Allow twitter badges/buttons through htmlpurifier, tinymce

htdocs/admin/site/options.php

@@ -38,7 +38,7 @@ $themeoptions = get_themes();
 $yesno = array(true  => get_string('yes'),
                false => get_string('no'));
 
-$allowedfilters = array('YouTube', 'GoogleVideo', 'TeacherTube', 'SciVee', 'Skype');
+$allowedfilters = array('YouTube', 'GoogleVideo', 'TeacherTube', 'SciVee', 'Skype', 'Twitter');  //@todo read from the htmlpurifiercustom directory
 $enabledfilters = get_config('filters');
 if ($enabledfilters) {
     $enabledfilters = unserialize($enabledfilters);
@@ -209,6 +209,11 @@ $siteoptionform['elements']['filters'] = array(
             'title'        => 'http://skype.com',
             'defaultvalue' => in_array('Skype', $enabledfilters),
         ),
+        'Twitter' => array(
+            'type'         => 'checkbox',
+            'title'        => 'http://twitter.com',
+            'defaultvalue' => in_array('Twitter', $enabledfilters),
+        ),
     ),
 );
 

htdocs/lib/htmlpurifiercustom/Twitter.php

+<?php
+
+class HTMLPurifier_Filter_Twitter extends HTMLPurifier_Filter
+{
+    
+    public $name = 'Twitter';
+    
+    public function preFilter($html, $config, $context) {
+        $pre_regex = array(
+            '#<div id="twitter_div">\s*<h2 class="sidebar-title">([^<]*)</h2>\s*<ul id="twitter_update_list"></ul>\s*</div>\s*'.
+            '<script\b[^>]+?\bsrc="http://twitter.com/javascripts/blogger.js"[^>]*></script>\s*'.
+            '<script\b[^>]+?\bsrc="http://twitter.com/statuses/user_timeline/([a-zA-Z0-9_]+).json\?callback=twitterCallback2&(?:amp;)?count=(\d+)"[^>]*></script>#s',
+            '#<embed\b[^>]+\bsrc="http://twitter.com/flash/twitter_badge.swf"[^>]+?\bflashvars="([^"]+)"[^>]*>\s*</embed>#s',
+            '#<embed\b[^>]+\bsrc="http://static.twitter.com/flash/twitter_timeline_badge.swf"[^>]+?\bflashvars="([^"]+)"[^>]*>\s*</embed>#s',
+        );
+        $pre_replace = array(
+            '<span class="twitter-updates-js"><span class="title">\1</span><span class="username">\2</span><span class="count">\3</span></span>',
+            '<span class="twitter-badge-flash">\1</span>',
+            '<span class="twitter-timeline-badge-flash">\1</span>',
+        );
+        return preg_replace($pre_regex, $pre_replace, $html);
+    }
+    
+    public function postFilter($html, $config, $context) {
+        $post_regex = array(
+            '#<span class="twitter-updates-js"><span class="title">([^<]+)</span><span class="username">([a-zA-Z0-9_]+)</span><span class="count">(\d+)</span></span>#',
+            '#<span class="twitter-badge-flash">([^"]+)</span>#',
+            '#<span class="twitter-timeline-badge-flash">([^"]+)</span>#',
+        );
+        $post_replace = array(
+            '<div id="twitter_div"><h2 class="sidebar-title">\1</h2><ul id="twitter_update_list"></ul></div>'.
+            '<script type="text/javascript" src="http://twitter.com/javascripts/blogger.js"></script>'.
+            '<script type="text/javascript" src="http://twitter.com/statuses/user_timeline/\2.json?callback=twitterCallback2&amp;count=\3"></script>',
+            '<object width="176" height="176" data="http://twitter.com/flash/twitter_badge.swf">'.
+            '<param name="flashvars" value="\1">'.
+            '<param name="name" value="twitter_badge">'.
+            '<!--[if IE]>'.
+            '<embed src="http://twitter.com/flash/twitter_badge.swf" '.
+            'flashvars="\1" quality="high" width="176" height="176" name="twitter_badge" '.
+            'align="middle" allowScriptAccess="always" wmode="transparent" type="application/x-shockwave-flash" '.
+            'pluginspage="http://www.macromedia.com/go/getflashplayer" />'.
+            '<![endif]-->'.
+            '</object>',
+            '<object width="200" height="400" data="http://static.twitter.com/flash/twitter_timeline_badge.swf">'.
+            '<param name="flashvars" value="\1">'.
+            '<param name="name" value="twitter_timeline_badge">'.
+            '<!--[if IE]>'.
+            '<embed src="http://static.twitter.com/flash/twitter_timeline_badge.swf" '.
+            'flashvars="\1" width="200" height="400" quality="high" name="twitter_timeline_badge" '.
+            'align="middle" allowScriptAccess="always" type="application/x-shockwave-flash" '.
+            'pluginspage="http://www.adobe.com/go/getflashplayer" />'.
+            '<![endif]-->'.
+            '</object>',
+        );
+        return preg_replace($post_regex, $post_replace, $html);
+    }
+    
+}

htdocs/lib/web.php

@@ -170,7 +170,7 @@ tinyMCE.init({
     button_tile_map: true,
     {$tinymce_config}
     {$execcommand}
-    extended_valid_elements : "object[width|height|classid|codebase],param[name|value],embed[src|type|width|height|flashvars|wmode],script[src,type,language]",
+    extended_valid_elements : "object[width|height|classid|codebase],param[name|value],embed[src|type|width|height|flashvars|wmode],script[src,type,language],+ul[id|type|compact]",
     urlconverter_callback : "custom_urlconvert",
     language: '{$language}',
     content_css : {$content_css},