From 8f8bda7343ad5e6740647f9c9078bb1a2b730bb9 Mon Sep 17 00:00:00 2001
From: Petr Skoda <commits@skodak.org>
Date: Mon, 23 Apr 2012 10:24:46 +0200
Subject: [PATCH] MDL-32427 fix suport for extra schemes in links in HTML
 Purifier

---
 lib/htmlpurifier/locallib.php      | 105 +++++++++++++++++++++++++++++
 lib/htmlpurifier/readme_moodle.txt |   3 +-
 lib/weblib.php                     |   1 +
 3 files changed, 108 insertions(+), 1 deletion(-)
 create mode 100644 lib/htmlpurifier/locallib.php

diff --git a/lib/htmlpurifier/locallib.php b/lib/htmlpurifier/locallib.php
new file mode 100644
index 00000000000..66e4e97ef0e
--- /dev/null
+++ b/lib/htmlpurifier/locallib.php
@@ -0,0 +1,105 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Extra classes needed for HTMLPurifier customisation for Moodle.
+ *
+ * @package    core
+ * @copyright  2012 Petr Skoda {@link http://skodak.org}
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL 3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+
+/**
+ * Validates RTSP defined by RFC 2326
+ */
+class HTMLPurifier_URIScheme_rtsp extends HTMLPurifier_URIScheme {
+
+    public $browsable = true;
+    public $hierarchical = true;
+
+    public function doValidate(&$uri, $config, $context) {
+        $uri->userinfo = null;
+        return true;
+    }
+
+}
+
+
+/**
+ * Validates IRC defined by IETF Draft
+ */
+class HTMLPurifier_URIScheme_irc extends HTMLPurifier_URIScheme {
+
+    public $browsable = true;
+    public $hierarchical = true;
+
+    public function doValidate(&$uri, $config, $context) {
+        $uri->userinfo = null;
+        return true;
+    }
+
+}
+
+
+/**
+ * Validates MMS defined by Microsoft
+ */
+class HTMLPurifier_URIScheme_mms extends HTMLPurifier_URIScheme {
+
+    public $browsable = true;
+    public $hierarchical = true;
+
+    public function doValidate(&$uri, $config, $context) {
+        $uri->userinfo = null;
+        return true;
+    }
+
+}
+
+
+/**
+ * Validates Gopher defined by RFC 4266
+ */
+class HTMLPurifier_URIScheme_gopher extends HTMLPurifier_URIScheme {
+
+    public $browsable = true;
+    public $hierarchical = true;
+
+    public function doValidate(&$uri, $config, $context) {
+        $uri->userinfo = null;
+        return true;
+    }
+
+}
+
+
+/**
+ * Validates TeamSpeak defined by TeamSpeak
+ */
+class HTMLPurifier_URIScheme_teamspeak extends HTMLPurifier_URIScheme {
+
+    public $browsable = true;
+    public $hierarchical = true;
+
+    public function doValidate(&$uri, $config, $context) {
+        $uri->userinfo = null;
+        return true;
+    }
+
+}
diff --git a/lib/htmlpurifier/readme_moodle.txt b/lib/htmlpurifier/readme_moodle.txt
index 7d4c4e8393d..e91a97f7f88 100644
--- a/lib/htmlpurifier/readme_moodle.txt
+++ b/lib/htmlpurifier/readme_moodle.txt
@@ -1,6 +1,7 @@
 Description of HTML Purifier v4.4.0+ library import into Moodle
 (Includes _blank fix 8c9d461a6259d7b8ac4ae5c9c9e95ab176cfcda3.)
 
-No Changes..
+Changes:
+* added locallib.php with Moodle specific extensions
 
 skodak
diff --git a/lib/weblib.php b/lib/weblib.php
index 35e09ebea12..04789834d4b 100644
--- a/lib/weblib.php
+++ b/lib/weblib.php
@@ -1522,6 +1522,7 @@ function purify_html($text, $options = array()) {
         check_dir_exists($cachedir);
 
         require_once $CFG->libdir.'/htmlpurifier/HTMLPurifier.safe-includes.php';
+        require_once $CFG->libdir.'/htmlpurifier/locallib.php';
         $config = HTMLPurifier_Config::createDefault();
 
         $config->set('HTML.DefinitionID', 'moodlehtml');