commit da9ac095a090efb1482c5bc762ebe72aef0289cd
Author: David Bogner <davidbogner@gmail.com>
Date:   Thu Apr 11 23:15:49 2013 +0200

    MDL-38910 autosubscribe users on frontpage forums

diff --git a/mod/forum/db/events.php b/mod/forum/db/events.php
index ded6583..ee3e825 100644
--- a/mod/forum/db/events.php
+++ b/mod/forum/db/events.php
@@ -38,4 +38,11 @@ $handlers = array (
         'schedule'         => 'instant',
         'internal'         => 1,
     ),
+
+    'user_created' => array (
+    		'handlerfile'      => '/mod/forum/lib.php',
+    		'handlerfunction'  => 'forum_user_created',
+    		'schedule'         => 'instant',
+    		'internal'         => 1,
+    ),
 );
diff --git a/mod/forum/lib.php b/mod/forum/lib.php
index 14a7427..fc53809 100644
--- a/mod/forum/lib.php
+++ b/mod/forum/lib.php
@@ -3065,6 +3065,7 @@ function forum_make_mail_post($course, $cm, $forum, $discussion, $post, $userfro
     // format the post body
     $options = new stdClass();
     $options->para = true;
+    $options->noclean = true;
     $formattedtext = format_text($post->message, $post->messageformat, $options, $course->id);
 
     $output = '<table border="0" cellpadding="3" cellspacing="0" class="forumpost">';
@@ -6274,6 +6275,42 @@ function forum_user_unenrolled($cp) {
     }
 }
 
+/**
+ * This function is called whenever a user is created.
+ * Users are automatically enrolled in a forum
+ * on the frontpage according to the forum settings
+ *
+ * @param stdClass $user complete user data as object
+ * @return void
+ */
+function forum_user_created($user) {
+	global $DB;
+	//check if at least one forum exists on frontpage if not don't go further in order to improve performance
+	if(!$DB->record_exists('forum', array('course' => 1))){
+		return;
+	}
+
+	$sql = "SELECT f.id, cm.id AS cmid
+              FROM {forum} f
+              JOIN {course_modules} cm ON (cm.instance = f.id)
+              JOIN {modules} m ON (m.id = cm.module)
+         LEFT JOIN {forum_subscriptions} fs ON (fs.forum = f.id AND fs.userid = :userid)
+             WHERE f.course = :courseid
+               AND f.forcesubscribe = :initial
+               AND m.name = 'forum'
+               AND fs.id IS NULL";
+	$params = array('courseid'=>1, 'userid'=>$user->id, 'initial'=>NEWSLETTERTEMP_INITIALSUBSCRIBE);
+
+	$forums = $DB->get_records_sql($sql, $params);
+
+	foreach ($forums as $forum) {
+		// If user doesn't have allowforcesubscribe capability then don't subscribe.
+		if (has_capability('mod/forum:allowforcesubscribe', context_module::instance($forum->cmid), $user->id)) {
+			forum_subscribe($user->id, $forum->id);
+		}
+	}
+}
+
 // Functions to do with read tracking.
 
 /**
diff --git a/mod/forum/version.php b/mod/forum/version.php
index d43c1fa..4a7bd7f 100644
--- a/mod/forum/version.php
+++ b/mod/forum/version.php
@@ -25,7 +25,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$module->version   = 2012112901;       // The current module version (Date: YYYYMMDDXX)
+$module->version   = 2013041100;       // The current module version (Date: YYYYMMDDXX)
 $module->requires  = 2012112900;    // Requires this Moodle version
 $module->component = 'mod_forum';      // Full name of the plugin (used for diagnostics)
 $module->cron      = 60;