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locallib.php
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locallib.php
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<?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/>.
/**
* Local stuff for cohort to group plugin.
*
* @package enrol_groupsync
* @copyright 2012 Petr Skoda {@link http://skodak.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* Sync all cohort course links.
* @param int $courseid one course, empty mean all
* @param bool $verbose verbose CLI output
* @return int 0 means ok, 1 means error, 2 means plugin disabled
*/
function enrol_groupsync_sync($courseid = null, $verbose = false) {
global $CFG, $DB;
require_once("$CFG->dirroot/group/lib.php");
// Purge all roles if cohort sync disabled, those can be recreated later here by cron or CLI.
if (!enrol_is_enabled('groupsync')) {
if ($verbose) {
mtrace('Cohort to group sync plugin is disabled, removing all group memberships.');
}
$sql = "SELECT gm.groupid, gm.userid
FROM {groups_members} gm
WHERE gm.component = 'enrol_groupsync'";
$rs = $DB->get_recordset_sql($sql, array());
foreach ($rs as $gm) {
groups_remove_member($gm->groupid, $gm->userid);
}
$rs->close();
return 2;
}
// Unfortunately this may take a long time, this script can be interrupted without problems.
@set_time_limit(0);
if ($verbose) {
mtrace('Starting cohort to group membership synchronisation...');
}
if ($courseid) {
$params = array('enabled' => ENROL_INSTANCE_ENABLED, 'courseid' => $courseid);
$courseselect = "AND e.courseid = :courseid";
} else {
$params = array('enabled' => ENROL_INSTANCE_ENABLED);
$courseselect = "";
}
// Cleanup first.
$sql = "SELECT DISTINCT gm.groupid, gm.userid, g.courseid
FROM {groups_members} gm
JOIN {groups} g ON (g.id = gm.groupid)
JOIN {enrol} e ON (e.courseid = g.courseid AND e.enrol = 'groupsync')
JOIN {cohort} c ON (c.id = e.customint1)
LEFT JOIN {cohort_members} cm ON (cm.cohortid = c.id AND cm.userid = gm.userid)
WHERE gm.component = 'enrol_groupsync'
AND gm.itemid = e.id
AND (e.status <> :enabled OR g.id <> e.customint2 OR cm.id IS NULL) $courseselect";
$rs = $DB->get_recordset_sql($sql, $params);
foreach ($rs as $gm) {
groups_remove_member($gm->groupid, $gm->userid);
if ($verbose) {
mtrace("Removing user $gm->userid from group $gm->groupid in course $gm->courseid");
}
}
$rs->close();
// Add missing group memberships.
$sql = "SELECT DISTINCT e.id, e.customint2, e.courseid, ue.userid
FROM {enrol} e
JOIN {enrol} oe ON (oe.courseid = e.courseid and oe.enrol <> 'groupsync')
JOIN {user_enrolments} ue ON (ue.enrolid = oe.id)
JOIN {cohort} c ON (c.id = e.customint1)
JOIN {cohort_members} cm ON (cm.cohortid = c.id AND cm.userid = ue.userid)
JOIN {groups} g ON (g.courseid = e.courseid AND g.id = e.customint2)
LEFT JOIN {groups_members} gm ON (gm.userid = ue.userid AND gm.groupid = g.id)
WHERE e.enrol = 'groupsync' AND e.status = :enabled $courseselect AND gm.id IS NULL
ORDER BY e.id ASC";
$rs = $DB->get_recordset_sql($sql, $params);
foreach ($rs as $instance) {
if (groups_add_member($instance->customint2, $instance->userid, 'enrol_groupsync', $instance->id)) {
if ($verbose) {
mtrace("Adding user $instance->userid to group $instance->customint2 in course $instance->courseid");
}
} else {
if ($verbose) {
mtrace("Could not add $instance->userid to group $instance->customint2 in course $instance->courseid");
}
}
}
$rs->close();
if ($verbose) {
mtrace('...synchronisation finished.');
}
return 0;
}