From 1ba43a9c6fb1e3790762773f314bdb6a5b035600 Mon Sep 17 00:00:00 2001
From: Jean-Philippe Gaudreau <jp.gaudreau@umontreal.ca>
Date: Wed, 22 Aug 2012 09:05:11 -0400
Subject: [PATCH] MDL-34997 - Allow shortened url youtu.be and y2u.be for
 Youtube filter

---
 filter/mediaplugin/tests/filter_test.php |  3 +++
 lib/medialib.php                         | 18 +++++++++++-------
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/filter/mediaplugin/tests/filter_test.php b/filter/mediaplugin/tests/filter_test.php
index 86876102204..c0044fb6ab5 100644
--- a/filter/mediaplugin/tests/filter_test.php
+++ b/filter/mediaplugin/tests/filter_test.php
@@ -57,6 +57,9 @@ class filter_mediaplugin_testcase extends advanced_testcase {
             '<a id="movie player" class="center" href="http://moodle.org/testfile/test.mpg">test mpg</a>',
             '<a href="http://moodle.org/testfile/test.ram">test</a>',
             '<a href="http://www.youtube.com/watch?v=JghQgA2HMX8" class="href=css">test file</a>',
+            '<a href="http://www.youtube-nocookie.com/watch?v=JghQgA2HMX8" class="href=css">test file</a>',
+            '<a href="http://youtu.be/JghQgA2HMX8" class="href=css">test file</a>',
+            '<a href="http://y2u.be/JghQgA2HMX8" class="href=css">test file</a>',
             '<a class="youtube" href="http://www.youtube.com/watch?v=JghQgA2HMX8">test file</a>',
             '<a class="_blanktarget" href="http://moodle.org/testfile/test.flv?d=100x100">test flv</a>',
             '<a class="hrefcss" href="http://www.youtube.com/watch?v=JghQgA2HMX8">test file</a>',
diff --git a/lib/medialib.php b/lib/medialib.php
index fb8cdf6b7ae..e75e07743be 100644
--- a/lib/medialib.php
+++ b/lib/medialib.php
@@ -526,8 +526,7 @@ OET;
  */
 class core_media_player_youtube extends core_media_player_external {
     protected function embed_external(moodle_url $url, $name, $width, $height, $options) {
-        $site = $this->matches[1];
-        $videoid = $this->matches[3];
+        $videoid = end($this->matches);
 
         $info = trim($name);
         if (empty($info) or strpos($info, 'http') === 0) {
@@ -540,17 +539,22 @@ class core_media_player_youtube extends core_media_player_external {
         return <<<OET
 <span class="mediaplugin mediaplugin_youtube">
 <iframe title="$info" width="$width" height="$height"
-  src="https://$site/embed/$videoid?rel=0&wmode=transparent" frameborder="0" allowfullscreen="1"></iframe>
+  src="https://www.youtube.com/embed/$videoid?rel=0&wmode=transparent" frameborder="0" allowfullscreen="1"></iframe>
 </span>
 OET;
 
     }
 
     protected function get_regex() {
+        // Regex for standard youtube link
+         $link = '(youtube(-nocookie)?\.com/(?:watch\?v=|v/))';
+        // Regex for shortened youtube link
+        $shortlink = '((youtu|y2u)\.be/)';
+
         // Initial part of link.
-        $start = '~^https?://(www\.youtube(-nocookie)?\.com)/';
-        // Middle bit: either watch?v= or v/.
-        $middle = '(?:watch\?v=|v/)([a-z0-9\-_]+)';
+         $start = '~^https?://(www\.)?(' . $link . '|' . $shortlink . ')';
+        // Middle bit: Video key value
+        $middle = '([a-z0-9\-_]+)';
         return $start . $middle . core_media_player_external::END_LINK_REGEX_PART;
     }
 
@@ -561,7 +565,7 @@ OET;
     }
 
     public function get_embeddable_markers() {
-        return array('youtube');
+        return array('youtube.com', 'youtube-nocookie.com', 'youtu.be', 'y2u.be');
     }
 }