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449 lines
16 KiB
449 lines
16 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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* Meta course enrolment plugin.
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*
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* @package enrol_meta
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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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/**
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* ENROL_META_CREATE_GROUP constant for automatically creating a group for a meta course.
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*/
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define('ENROL_META_CREATE_GROUP', -1);
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/**
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* Meta course enrolment plugin.
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* @author Petr Skoda
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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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class enrol_meta_plugin extends enrol_plugin {
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/**
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* Returns localised name of enrol instance
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*
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* @param stdClass $instance (null is accepted too)
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* @return string
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*/
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public function get_instance_name($instance) {
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global $DB;
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if (empty($instance)) {
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$enrol = $this->get_name();
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return get_string('pluginname', 'enrol_'.$enrol);
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} else if (empty($instance->name)) {
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$enrol = $this->get_name();
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$course = $DB->get_record('course', array('id'=>$instance->customint1));
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if ($course) {
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$coursename = format_string(get_course_display_name_for_list($course));
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} else {
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// Use course id, if course is deleted.
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$coursename = $instance->customint1;
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}
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return get_string('pluginname', 'enrol_' . $enrol) . ' (' . $coursename . ')';
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} else {
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return format_string($instance->name);
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}
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}
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/**
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* Returns true if we can add a new instance to this course.
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*
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* @param int $courseid
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* @return boolean
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*/
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public function can_add_instance($courseid) {
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$context = context_course::instance($courseid, MUST_EXIST);
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if (!has_capability('moodle/course:enrolconfig', $context) or !has_capability('enrol/meta:config', $context)) {
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return false;
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}
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// Multiple instances supported - multiple parent courses linked.
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return true;
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}
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/**
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* Does this plugin allow manual unenrolment of a specific user?
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* Yes, but only if user suspended...
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*
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* @param stdClass $instance course enrol instance
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* @param stdClass $ue record from user_enrolments table
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*
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* @return bool - true means user with 'enrol/xxx:unenrol' may unenrol this user, false means nobody may touch this user enrolment
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*/
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public function allow_unenrol_user(stdClass $instance, stdClass $ue) {
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if ($ue->status == ENROL_USER_SUSPENDED) {
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return true;
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}
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return false;
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}
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/**
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* Called after updating/inserting course.
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*
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* @param bool $inserted true if course just inserted
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* @param stdClass $course
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* @param stdClass $data form data
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* @return void
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*/
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public function course_updated($inserted, $course, $data) {
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// Meta sync updates are slow, if enrolments get out of sync teacher will have to wait till next cron.
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// We should probably add some sync button to the course enrol methods overview page.
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}
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/**
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* Add new instance of enrol plugin.
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* @param object $course
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* @param array $fields instance fields
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* @return int id of last instance, null if can not be created
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*/
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public function add_instance($course, array $fields = null) {
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global $CFG;
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require_once("$CFG->dirroot/enrol/meta/locallib.php");
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// Support creating multiple at once.
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if (is_array($fields['customint1'])) {
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$courses = array_unique($fields['customint1']);
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} else {
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$courses = array($fields['customint1']);
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}
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foreach ($courses as $courseid) {
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if (!empty($fields['customint2']) && $fields['customint2'] == ENROL_META_CREATE_GROUP) {
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$context = context_course::instance($course->id);
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require_capability('moodle/course:managegroups', $context);
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$groupid = enrol_meta_create_new_group($course->id, $courseid);
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$fields['customint2'] = $groupid;
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}
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$fields['customint1'] = $courseid;
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$result = parent::add_instance($course, $fields);
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}
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enrol_meta_sync($course->id);
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return $result;
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}
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/**
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* Update instance of enrol plugin.
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* @param stdClass $instance
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* @param stdClass $data modified instance fields
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* @return boolean
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*/
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public function update_instance($instance, $data) {
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global $CFG;
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require_once("$CFG->dirroot/enrol/meta/locallib.php");
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if (!empty($data->customint2) && $data->customint2 == ENROL_META_CREATE_GROUP) {
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$context = context_course::instance($instance->courseid);
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require_capability('moodle/course:managegroups', $context);
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$groupid = enrol_meta_create_new_group($instance->courseid, $data->customint1);
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$data->customint2 = $groupid;
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}
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$result = parent::update_instance($instance, $data);
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enrol_meta_sync($instance->courseid);
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return $result;
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}
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/**
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* Update instance status
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*
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* @param stdClass $instance
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* @param int $newstatus ENROL_INSTANCE_ENABLED, ENROL_INSTANCE_DISABLED
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* @return void
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*/
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public function update_status($instance, $newstatus) {
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global $CFG;
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parent::update_status($instance, $newstatus);
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require_once("$CFG->dirroot/enrol/meta/locallib.php");
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enrol_meta_sync($instance->courseid);
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}
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/**
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* Is it possible to delete enrol instance via standard UI?
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*
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* @param stdClass $instance
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* @return bool
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*/
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public function can_delete_instance($instance) {
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$context = context_course::instance($instance->courseid);
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return has_capability('enrol/meta:config', $context);
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}
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/**
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* Is it possible to hide/show enrol instance via standard UI?
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*
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* @param stdClass $instance
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* @return bool
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*/
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public function can_hide_show_instance($instance) {
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$context = context_course::instance($instance->courseid);
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return has_capability('enrol/meta:config', $context);
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}
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/**
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* We are a good plugin and don't invent our own UI/validation code path.
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*
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* @return boolean
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*/
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public function use_standard_editing_ui() {
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return true;
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}
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/**
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* Return an array of valid options for the courses.
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*
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* @param stdClass $instance
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* @param context $coursecontext
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* @return array
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*/
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protected function get_course_options($instance, $coursecontext) {
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global $DB;
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if ($instance->id) {
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$where = 'WHERE c.id = :courseid';
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$params = array('courseid' => $instance->customint1);
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$existing = array();
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} else {
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$where = '';
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$params = array();
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$instanceparams = array('enrol' => 'meta', 'courseid' => $instance->courseid);
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$existing = $DB->get_records('enrol', $instanceparams, '', 'customint1, id');
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}
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// TODO: this has to be done via ajax or else it will fail very badly on large sites!
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$courses = array();
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$select = ', ' . context_helper::get_preload_record_columns_sql('ctx');
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$join = "LEFT JOIN {context} ctx ON (ctx.instanceid = c.id AND ctx.contextlevel = :contextlevel)";
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$sortorder = 'c.' . $this->get_config('coursesort', 'sortorder') . ' ASC';
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$sql = "SELECT c.id, c.fullname, c.shortname, c.visible $select FROM {course} c $join $where ORDER BY $sortorder";
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$rs = $DB->get_recordset_sql($sql, array('contextlevel' => CONTEXT_COURSE) + $params);
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foreach ($rs as $c) {
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if ($c->id == SITEID or $c->id == $instance->courseid or isset($existing[$c->id])) {
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continue;
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}
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context_helper::preload_from_record($c);
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$coursecontext = context_course::instance($c->id);
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if (!$c->visible and !has_capability('moodle/course:viewhiddencourses', $coursecontext)) {
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continue;
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}
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if (!has_capability('enrol/meta:selectaslinked', $coursecontext)) {
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continue;
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}
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$courses[$c->id] = $coursecontext->get_context_name(false);
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}
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$rs->close();
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return $courses;
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}
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/**
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* Return an array of valid options for the groups.
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*
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* @param context $coursecontext
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* @return array
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*/
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protected function get_group_options($coursecontext) {
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$groups = array(0 => get_string('none'));
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$courseid = $coursecontext->instanceid;
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if (has_capability('moodle/course:managegroups', $coursecontext)) {
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$groups[ENROL_META_CREATE_GROUP] = get_string('creategroup', 'enrol_meta');
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}
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foreach (groups_get_all_groups($courseid) as $group) {
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$groups[$group->id] = format_string($group->name, true, array('context' => $coursecontext));
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}
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return $groups;
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}
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/**
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* Add elements to the edit instance form.
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*
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* @param stdClass $instance
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* @param MoodleQuickForm $mform
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* @param context $coursecontext
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* @return bool
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*/
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public function edit_instance_form($instance, MoodleQuickForm $mform, $coursecontext) {
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global $DB;
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$groups = $this->get_group_options($coursecontext);
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$existing = $DB->get_records('enrol', array('enrol' => 'meta', 'courseid' => $coursecontext->instanceid), '', 'customint1, id');
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$excludelist = array($coursecontext->instanceid);
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foreach ($existing as $existinginstance) {
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$excludelist[] = $existinginstance->customint1;
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}
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$options = array(
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'requiredcapabilities' => array('enrol/meta:selectaslinked'),
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'multiple' => empty($instance->id), // We only accept multiple values on creation.
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'exclude' => $excludelist
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);
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$mform->addElement('course', 'customint1', get_string('linkedcourse', 'enrol_meta'), $options);
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$mform->addRule('customint1', get_string('required'), 'required', null, 'client');
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if (!empty($instance->id)) {
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$mform->freeze('customint1');
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}
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$mform->addElement('select', 'customint2', get_string('addgroup', 'enrol_meta'), $groups);
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}
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/**
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* Perform custom validation of the data used to edit the instance.
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*
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* @param array $data array of ("fieldname"=>value) of submitted data
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* @param array $files array of uploaded files "element_name"=>tmp_file_path
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* @param object $instance The instance loaded from the DB
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* @param context $context The context of the instance we are editing
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* @return array of "element_name"=>"error_description" if there are errors,
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* or an empty array if everything is OK.
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* @return void
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*/
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public function edit_instance_validation($data, $files, $instance, $context) {
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global $DB;
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$errors = array();
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$thiscourseid = $context->instanceid;
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$c = false;
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if (!empty($data['customint1'])) {
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$courses = is_array($data['customint1']) ? $data['customint1'] : [$data['customint1']];
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foreach ($courses as $courseid) {
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$c = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
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$coursecontext = context_course::instance($c->id);
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$sqlexists = 'enrol = :meta AND courseid = :currentcourseid AND customint1 = :courseid AND id != :id';
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$existing = $DB->record_exists_select('enrol', $sqlexists, [
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'meta' => 'meta',
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'currentcourseid' => $thiscourseid,
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'courseid' => $c->id,
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'id' => $instance->id
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]);
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if (!$c->visible and !has_capability('moodle/course:viewhiddencourses', $coursecontext)) {
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$errors['customint1'] = get_string('error');
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} else if (!has_capability('enrol/meta:selectaslinked', $coursecontext)) {
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$errors['customint1'] = get_string('error');
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} else if ($c->id == SITEID or $c->id == $thiscourseid or $existing) {
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$errors['customint1'] = get_string('error');
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}
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}
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} else {
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$errors['customint1'] = get_string('required');
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}
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$validgroups = array_keys($this->get_group_options($context));
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$tovalidate = array(
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'customint2' => $validgroups
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);
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$typeerrors = $this->validate_param_types($data, $tovalidate);
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$errors = array_merge($errors, $typeerrors);
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return $errors;
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}
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/**
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* Restore instance and map settings.
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*
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* @param restore_enrolments_structure_step $step
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* @param stdClass $data
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* @param stdClass $course
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* @param int $oldid
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*/
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public function restore_instance(restore_enrolments_structure_step $step, stdClass $data, $course, $oldid) {
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global $DB, $CFG;
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if (!$step->get_task()->is_samesite()) {
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// No meta restore from other sites.
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$step->set_mapping('enrol', $oldid, 0);
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return;
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}
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if (!empty($data->customint2)) {
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$data->customint2 = $step->get_mappingid('group', $data->customint2);
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}
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if ($DB->record_exists('course', array('id' => $data->customint1))) {
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$instance = $DB->get_record('enrol', array('roleid' => $data->roleid, 'customint1' => $data->customint1,
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'courseid' => $course->id, 'enrol' => $this->get_name()));
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if ($instance) {
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$instanceid = $instance->id;
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} else {
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$instanceid = $this->add_instance($course, (array)$data);
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}
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$step->set_mapping('enrol', $oldid, $instanceid);
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require_once("$CFG->dirroot/enrol/meta/locallib.php");
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enrol_meta_sync($data->customint1);
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} else {
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$step->set_mapping('enrol', $oldid, 0);
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}
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}
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/**
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* Restore user enrolment.
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*
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* @param restore_enrolments_structure_step $step
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* @param stdClass $data
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* @param stdClass $instance
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* @param int $userid
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* @param int $oldinstancestatus
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*/
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public function restore_user_enrolment(restore_enrolments_structure_step $step, $data, $instance, $userid, $oldinstancestatus) {
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global $DB;
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if ($this->get_config('unenrolaction') != ENROL_EXT_REMOVED_SUSPENDNOROLES) {
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// Enrolments were already synchronised in restore_instance(), we do not want any suspended leftovers.
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return;
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}
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// ENROL_EXT_REMOVED_SUSPENDNOROLES means all previous enrolments are restored
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// but without roles and suspended.
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if (!$DB->record_exists('user_enrolments', array('enrolid' => $instance->id, 'userid' => $userid))) {
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$this->enrol_user($instance, $userid, null, $data->timestart, $data->timeend, ENROL_USER_SUSPENDED);
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if ($instance->customint2) {
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groups_add_member($instance->customint2, $userid, 'enrol_meta', $instance->id);
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}
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}
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}
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/**
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* Restore user group membership.
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* @param stdClass $instance
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* @param int $groupid
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* @param int $userid
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*/
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public function restore_group_member($instance, $groupid, $userid) {
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// Nothing to do here, the group members are added in $this->restore_group_restored().
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return;
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}
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}
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