From ffc670d93109586c9c78ff366854dee88d493cf7 Mon Sep 17 00:00:00 2001
From: skodak <skodak>
Date: Sun, 6 Jul 2008 22:54:46 +0000
Subject: [PATCH] MDL-9983 role_unassign should not touch group members table
 directly - we need events; merged from MOODLE_19_STABLE

---
 group/lib.php     | 30 ++++++++++++++++++++++++------
 lib/accesslib.php |  7 ++-----
 lib/db/events.php |  2 +-
 lib/moodlelib.php |  2 +-
 4 files changed, 28 insertions(+), 13 deletions(-)

diff --git a/group/lib.php b/group/lib.php
index 1fcd8410c26..af3411fb8a4 100644
--- a/group/lib.php
+++ b/group/lib.php
@@ -259,19 +259,37 @@ function groups_delete_grouping($groupingorid) {
 }
 
 /**
- * Remove all users from all groups in course
+ * Remove all users (or one user) from all groups in course
  * @param int $courseid
+ * @param int $userid 0 means all users
  * @param bool $showfeedback
  * @return bool success
  */
-function groups_delete_group_members($courseid, $showfeedback=false) {
+function groups_delete_group_members($courseid, $userid=0, $showfeedback=false) {
     global $DB;
 
-    $groupssql = "SELECT id FROM {groups} g WHERE g.courseid = ?";
-    $DB->delete_records_select('groups_members', "groupid IN ($groupssql)", array($courseid));
+    if (is_bool($userid)) {
+        debugging('Incorrect userid function parameter');
+        return false;
+    }
+
+    $params = array('courseid'=>$courseid);
+
+    if ($userid) {
+        $usersql = "AND userid = :userid";
+        $params['userid'] = $userid;
+    } else {
+        $usersql = "";
+    }
+
+    $groupssql = "SELECT id FROM {groups} g WHERE g.courseid = :courseid";
+    $DB->delete_records_select('groups_members', "groupid IN ($groupssql) $usersql", $params);
 
     //trigger groups events
-    events_trigger('groups_members_removed', $courseid);
+    $eventdata = new object();
+    $eventdata->courseid = $courseid;
+    $eventdata->userid   = $userid;
+    events_trigger('groups_members_removed', $eventdata);
 
     if ($showfeedback) {
         notify(get_string('deleted').' groups_members');
@@ -314,7 +332,7 @@ function groups_delete_groups($courseid, $showfeedback=false) {
 
     // delete any uses of groups
     groups_delete_groupings_groups($courseid, $showfeedback);
-    groups_delete_group_members($courseid, $showfeedback);
+    groups_delete_group_members($courseid, 0, $showfeedback);
 
     // delete group pictures
     if ($groups = $DB->get_records('groups', array('courseid'=>$courseid))) {
diff --git a/lib/accesslib.php b/lib/accesslib.php
index 3ac494dde9d..7ca56187db8 100755
--- a/lib/accesslib.php
+++ b/lib/accesslib.php
@@ -2646,6 +2646,7 @@ function get_roles_with_capability($capability, $permission=NULL, $context='') {
  */
 function role_assign($roleid, $userid, $groupid, $contextid, $timestart=0, $timeend=0, $hidden=0, $enrol='manual',$timemodified='') {
     global $USER, $CFG, $DB;
+    require_once($CFG->dirroot.'/group/lib.php');
 
 /// Do some data validation
 
@@ -2837,11 +2838,7 @@ function role_unassign($roleid=0, $userid=0, $groupid=0, $contextid=0, $enrol=NU
                     // this may be slow, but this is the proper way of doing it
                     if (!has_capability('moodle/course:view', $context, $ra->userid)) {
                         // remove from groups
-                        if ($groups = groups_get_all_groups($context->instanceid)) {
-                            foreach ($groups as $group) {
-                                $DB->delete_records('groups_members', array('groupid'=>$group->id, 'userid'=>$ra->userid));
-                            }
-                        }
+                        groups_delete_group_members($context->instanceid, $ra->userid);
 
                         // delete lastaccess records
                         $DB->delete_records('user_lastaccess', array('userid'=>$ra->userid, 'courseid'=>$context->instanceid));
diff --git a/lib/db/events.php b/lib/db/events.php
index 5995e2fcaf1..9a5542423cb 100644
--- a/lib/db/events.php
+++ b/lib/db/events.php
@@ -64,7 +64,7 @@ groups_grouping_created - object groups_grouping table record
 groups_grouping_updated - object groups_grouping table record
 groups_grouping_deleted - object groups_grouping table record
 
-groups_members_removed          - int course id - removed all members from all groups in course
+groups_members_removed          - object courseid+userid - removed all users (or one user) from all groups in course
 groups_groupings_groups_removed - int course id - removed all groups from all groupings in course
 groups_groups_deleted           - int course id - deleted all course groups
 groups_groupings_deleted        - int course id - deleted all course groupings
diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 6cfa70ed70d..daa16e7a8f1 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -3697,7 +3697,7 @@ function reset_course_userdata($data) {
 
     // remove all group members
     if (!empty($data->reset_groups_members)) {
-        groups_delete_group_members($data->courseid, false);
+        groups_delete_group_members($data->courseid);
         $status[] = array('component'=>$componentstr, 'item'=>get_string('removegroupsmembers', 'group'), 'error'=>false);
     }