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303 lines
13 KiB
303 lines
13 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Local stuff for cohort enrolment plugin.
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*
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* @package enrol_cohort
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* @copyright 2010 Petr Skoda {@link http://skodak.org}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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require_once($CFG->dirroot . '/enrol/locallib.php');
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require_once($CFG->dirroot . '/cohort/lib.php');
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/**
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* Event handler for cohort enrolment plugin.
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*
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* We try to keep everything in sync via listening to events,
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* it may fail sometimes, so we always do a full sync in cron too.
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*/
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class enrol_cohort_handler {
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/**
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* Event processor - cohort member added.
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* @param \core\event\cohort_member_added $event
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* @return bool
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*/
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public static function member_added(\core\event\cohort_member_added $event) {
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global $DB, $CFG;
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require_once("$CFG->dirroot/group/lib.php");
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if (!enrol_is_enabled('cohort')) {
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return true;
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}
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// Does any enabled cohort instance want to sync with this cohort?
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$sql = "SELECT e.*, r.id as roleexists
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FROM {enrol} e
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LEFT JOIN {role} r ON (r.id = e.roleid)
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WHERE e.customint1 = :cohortid AND e.enrol = 'cohort' AND e.status = :enrolstatus
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ORDER BY e.id ASC";
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$params['cohortid'] = $event->objectid;
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$params['enrolstatus'] = ENROL_INSTANCE_ENABLED;
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if (!$instances = $DB->get_records_sql($sql, $params)) {
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return true;
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}
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$plugin = enrol_get_plugin('cohort');
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foreach ($instances as $instance) {
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if ($instance->status != ENROL_INSTANCE_ENABLED ) {
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// No roles for disabled instances.
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$instance->roleid = 0;
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} else if ($instance->roleid and !$instance->roleexists) {
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// Invalid role - let's just enrol, they will have to create new sync and delete this one.
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$instance->roleid = 0;
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}
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unset($instance->roleexists);
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// No problem if already enrolled.
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$plugin->enrol_user($instance, $event->relateduserid, $instance->roleid, 0, 0, ENROL_USER_ACTIVE);
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// Sync groups.
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if ($instance->customint2) {
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if (!groups_is_member($instance->customint2, $event->relateduserid)) {
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if ($group = $DB->get_record('groups', array('id'=>$instance->customint2, 'courseid'=>$instance->courseid))) {
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groups_add_member($group->id, $event->relateduserid, 'enrol_cohort', $instance->id);
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}
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}
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}
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}
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return true;
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}
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/**
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* Event processor - cohort member removed.
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* @param \core\event\cohort_member_removed $event
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* @return bool
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*/
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public static function member_removed(\core\event\cohort_member_removed $event) {
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global $DB;
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// Does anything want to sync with this cohort?
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if (!$instances = $DB->get_records('enrol', array('customint1'=>$event->objectid, 'enrol'=>'cohort'), 'id ASC')) {
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return true;
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}
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$plugin = enrol_get_plugin('cohort');
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$unenrolaction = $plugin->get_config('unenrolaction', ENROL_EXT_REMOVED_UNENROL);
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foreach ($instances as $instance) {
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if (!$ue = $DB->get_record('user_enrolments', array('enrolid'=>$instance->id, 'userid'=>$event->relateduserid))) {
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continue;
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}
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if ($unenrolaction == ENROL_EXT_REMOVED_UNENROL) {
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$plugin->unenrol_user($instance, $event->relateduserid);
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} else {
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if ($ue->status != ENROL_USER_SUSPENDED) {
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$plugin->update_user_enrol($instance, $ue->userid, ENROL_USER_SUSPENDED);
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$context = context_course::instance($instance->courseid);
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role_unassign_all(array('userid'=>$ue->userid, 'contextid'=>$context->id, 'component'=>'enrol_cohort', 'itemid'=>$instance->id));
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}
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}
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}
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return true;
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}
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/**
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* Event processor - cohort deleted.
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* @param \core\event\cohort_deleted $event
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* @return bool
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*/
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public static function deleted(\core\event\cohort_deleted $event) {
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global $DB;
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// Does anything want to sync with this cohort?
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if (!$instances = $DB->get_records('enrol', array('customint1'=>$event->objectid, 'enrol'=>'cohort'), 'id ASC')) {
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return true;
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}
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$plugin = enrol_get_plugin('cohort');
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$unenrolaction = $plugin->get_config('unenrolaction', ENROL_EXT_REMOVED_UNENROL);
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foreach ($instances as $instance) {
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if ($unenrolaction == ENROL_EXT_REMOVED_SUSPENDNOROLES) {
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$context = context_course::instance($instance->courseid);
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role_unassign_all(array('contextid'=>$context->id, 'component'=>'enrol_cohort', 'itemid'=>$instance->id));
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$plugin->update_status($instance, ENROL_INSTANCE_DISABLED);
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} else {
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$plugin->delete_instance($instance);
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}
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}
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return true;
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}
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}
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/**
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* Sync all cohort course links.
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* @param progress_trace $trace
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* @param int $courseid one course, empty mean all
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* @return int 0 means ok, 1 means error, 2 means plugin disabled
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*/
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function enrol_cohort_sync(progress_trace $trace, $courseid = NULL) {
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global $CFG, $DB;
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require_once("$CFG->dirroot/group/lib.php");
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// Purge all roles if cohort sync disabled, those can be recreated later here by cron or CLI.
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if (!enrol_is_enabled('cohort')) {
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$trace->output('Cohort sync plugin is disabled, unassigning all plugin roles and stopping.');
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role_unassign_all(array('component'=>'enrol_cohort'));
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return 2;
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}
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// Unfortunately this may take a long time, this script can be interrupted without problems.
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core_php_time_limit::raise();
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raise_memory_limit(MEMORY_HUGE);
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$trace->output('Starting user enrolment synchronisation...');
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$allroles = get_all_roles();
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$instances = array(); //cache
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$plugin = enrol_get_plugin('cohort');
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$unenrolaction = $plugin->get_config('unenrolaction', ENROL_EXT_REMOVED_UNENROL);
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// Iterate through all not enrolled yet users.
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$onecourse = $courseid ? "AND e.courseid = :courseid" : "";
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$sql = "SELECT cm.userid, e.id AS enrolid, ue.status
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FROM {cohort_members} cm
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JOIN {enrol} e ON (e.customint1 = cm.cohortid AND e.enrol = 'cohort' AND e.status = :enrolstatus $onecourse)
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JOIN {user} u ON (u.id = cm.userid AND u.deleted = 0)
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LEFT JOIN {user_enrolments} ue ON (ue.enrolid = e.id AND ue.userid = cm.userid)
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WHERE ue.id IS NULL OR ue.status = :suspended";
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$params = array();
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$params['courseid'] = $courseid;
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$params['suspended'] = ENROL_USER_SUSPENDED;
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$params['enrolstatus'] = ENROL_INSTANCE_ENABLED;
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$rs = $DB->get_recordset_sql($sql, $params);
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foreach($rs as $ue) {
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if (!isset($instances[$ue->enrolid])) {
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$instances[$ue->enrolid] = $DB->get_record('enrol', array('id'=>$ue->enrolid));
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}
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$instance = $instances[$ue->enrolid];
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if ($ue->status == ENROL_USER_SUSPENDED) {
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$plugin->update_user_enrol($instance, $ue->userid, ENROL_USER_ACTIVE);
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$trace->output("unsuspending: $ue->userid ==> $instance->courseid via cohort $instance->customint1", 1);
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} else {
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$plugin->enrol_user($instance, $ue->userid);
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$trace->output("enrolling: $ue->userid ==> $instance->courseid via cohort $instance->customint1", 1);
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}
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}
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$rs->close();
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// Unenrol as necessary.
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$sql = "SELECT ue.*, e.courseid
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FROM {user_enrolments} ue
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JOIN {enrol} e ON (e.id = ue.enrolid AND e.enrol = 'cohort' $onecourse)
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LEFT JOIN {cohort_members} cm ON (cm.cohortid = e.customint1 AND cm.userid = ue.userid)
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WHERE cm.id IS NULL";
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$rs = $DB->get_recordset_sql($sql, array('courseid'=>$courseid));
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foreach($rs as $ue) {
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if (!isset($instances[$ue->enrolid])) {
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$instances[$ue->enrolid] = $DB->get_record('enrol', array('id'=>$ue->enrolid));
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}
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$instance = $instances[$ue->enrolid];
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if ($unenrolaction == ENROL_EXT_REMOVED_UNENROL) {
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// Remove enrolment together with group membership, grades, preferences, etc.
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$plugin->unenrol_user($instance, $ue->userid);
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$trace->output("unenrolling: $ue->userid ==> $instance->courseid via cohort $instance->customint1", 1);
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} else { // ENROL_EXT_REMOVED_SUSPENDNOROLES
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// Just disable and ignore any changes.
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if ($ue->status != ENROL_USER_SUSPENDED) {
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$plugin->update_user_enrol($instance, $ue->userid, ENROL_USER_SUSPENDED);
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$context = context_course::instance($instance->courseid);
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role_unassign_all(array('userid'=>$ue->userid, 'contextid'=>$context->id, 'component'=>'enrol_cohort', 'itemid'=>$instance->id));
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$trace->output("suspending and unsassigning all roles: $ue->userid ==> $instance->courseid", 1);
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}
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}
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}
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$rs->close();
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unset($instances);
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// Now assign all necessary roles to enrolled users - skip suspended instances and users.
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$onecourse = $courseid ? "AND e.courseid = :courseid" : "";
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$sql = "SELECT e.roleid, ue.userid, c.id AS contextid, e.id AS itemid, e.courseid
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FROM {user_enrolments} ue
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JOIN {enrol} e ON (e.id = ue.enrolid AND e.enrol = 'cohort' AND e.status = :statusenabled $onecourse)
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JOIN {role} r ON (r.id = e.roleid)
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JOIN {context} c ON (c.instanceid = e.courseid AND c.contextlevel = :coursecontext)
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JOIN {user} u ON (u.id = ue.userid AND u.deleted = 0)
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LEFT JOIN {role_assignments} ra ON (ra.contextid = c.id AND ra.userid = ue.userid AND ra.itemid = e.id AND ra.component = 'enrol_cohort' AND e.roleid = ra.roleid)
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WHERE ue.status = :useractive AND ra.id IS NULL";
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$params = array();
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$params['statusenabled'] = ENROL_INSTANCE_ENABLED;
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$params['useractive'] = ENROL_USER_ACTIVE;
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$params['coursecontext'] = CONTEXT_COURSE;
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$params['courseid'] = $courseid;
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$rs = $DB->get_recordset_sql($sql, $params);
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foreach($rs as $ra) {
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role_assign($ra->roleid, $ra->userid, $ra->contextid, 'enrol_cohort', $ra->itemid);
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$trace->output("assigning role: $ra->userid ==> $ra->courseid as ".$allroles[$ra->roleid]->shortname, 1);
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}
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$rs->close();
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// Remove unwanted roles - sync role can not be changed, we only remove role when unenrolled.
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$onecourse = $courseid ? "AND e.courseid = :courseid" : "";
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$sql = "SELECT ra.roleid, ra.userid, ra.contextid, ra.itemid, e.courseid
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FROM {role_assignments} ra
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JOIN {context} c ON (c.id = ra.contextid AND c.contextlevel = :coursecontext)
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JOIN {enrol} e ON (e.id = ra.itemid AND e.enrol = 'cohort' $onecourse)
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LEFT JOIN {user_enrolments} ue ON (ue.enrolid = e.id AND ue.userid = ra.userid AND ue.status = :useractive)
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WHERE ra.component = 'enrol_cohort' AND (ue.id IS NULL OR e.status <> :statusenabled)";
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$params = array();
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$params['statusenabled'] = ENROL_INSTANCE_ENABLED;
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$params['useractive'] = ENROL_USER_ACTIVE;
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$params['coursecontext'] = CONTEXT_COURSE;
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$params['courseid'] = $courseid;
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$rs = $DB->get_recordset_sql($sql, $params);
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foreach($rs as $ra) {
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role_unassign($ra->roleid, $ra->userid, $ra->contextid, 'enrol_cohort', $ra->itemid);
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$trace->output("unassigning role: $ra->userid ==> $ra->courseid as ".$allroles[$ra->roleid]->shortname, 1);
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}
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$rs->close();
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// Finally sync groups.
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$affectedusers = groups_sync_with_enrolment('cohort', $courseid);
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foreach ($affectedusers['removed'] as $gm) {
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$trace->output("removing user from group: $gm->userid ==> $gm->courseid - $gm->groupname", 1);
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}
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foreach ($affectedusers['added'] as $ue) {
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$trace->output("adding user to group: $ue->userid ==> $ue->courseid - $ue->groupname", 1);
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}
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$trace->output('...user enrolment synchronisation finished.');
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return 0;
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}
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