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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/>.
/**
* Privacy Subsystem implementation for mnetservice_enrol.
*
* @package mnetservice_enrol
* @copyright 2018 Carlos Escobedo <carlos@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace mnetservice_enrol\privacy;
defined('MOODLE_INTERNAL') || die();
use core_privacy\local\metadata\collection;
use core_privacy\local\request\approved_contextlist;
use core_privacy\local\request\context;
use core_privacy\local\request\contextlist;
use core_privacy\local\request\transform;
use core_privacy\local\request\writer;
use core_privacy\local\request\userlist;
use core_privacy\local\request\approved_userlist;
/**
* Privacy Subsystem for mnetservice_enrol implementing metadata and plugin providers.
*
* @copyright 2018 Carlos Escobedo <carlos@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class provider implements
\core_privacy\local\metadata\provider,
\core_privacy\local\request\core_userlist_provider,
\core_privacy\local\request\plugin\provider {
/**
* Returns meta data about this system.
*
* @param collection $collection The initialised collection to add items to.
* @return collection A listing of user data stored through this system.
*/
public static function get_metadata(collection $collection) : collection {
$collection->add_database_table(
'mnetservice_enrol_enrolments',
[
'hostid' => 'privacy:metadata:mnetservice_enrol_enrolments:hostid',
'userid' => 'privacy:metadata:mnetservice_enrol_enrolments:userid',
'remotecourseid' => 'privacy:metadata:mnetservice_enrol_enrolments:remotecourseid',
'rolename' => 'privacy:metadata:mnetservice_enrol_enrolments:rolename',
'enroltime' => 'privacy:metadata:mnetservice_enrol_enrolments:enroltime',
'enroltype' => 'privacy:metadata:mnetservice_enrol_enrolments:enroltype'
],
'privacy:metadata:mnetservice_enrol_enrolments:tableexplanation'
);
return $collection;
}
/**
* Get the list of contexts that contain user information for the specified user.
*
* @param int $userid The user to search.
* @return contextlist $contextlist The contextlist containing the list of contexts used in this plugin.
*/
public static function get_contexts_for_userid(int $userid) : contextlist {
$sql = "SELECT c.id
FROM {context} c
JOIN {mnetservice_enrol_enrolments} me
ON me.userid = c.instanceid
AND c.contextlevel = :contextlevel
WHERE me.userid = :userid";
$params = [
'contextlevel' => CONTEXT_USER,
'userid' => $userid
];
$contextlist = new contextlist();
$contextlist->add_from_sql($sql, $params);
return $contextlist;
}
/**
* Get the list of users within a specific context.
*
* @param userlist $userlist The userlist containing the list of users who have data in this context/plugin combination.
*/
public static function get_users_in_context(userlist $userlist) {
$context = $userlist->get_context();
if (!$context instanceof \context_user) {
return;
}
$params = ['userid' => $context->instanceid];
$sql = "SELECT userid
FROM {mnetservice_enrol_enrolments}
WHERE userid = :userid";
$userlist->add_from_sql('userid', $sql, $params);
}
/**
* Export all user data for the specified user, in the specified contexts.
*
* @param approved_contextlist $contextlist The approved contexts to export information for.
*/
public static function export_user_data(approved_contextlist $contextlist) {
global $DB;
if (empty($contextlist->count())) {
return;
}
$userid = $contextlist->get_user()->id;
$contextuser = \context_user::instance($userid);
list($insql, $inparams) = $DB->get_in_or_equal($contextlist->get_contextids(), SQL_PARAMS_NAMED);
$params = [
'userid' => $userid,
'contextlevel' => CONTEXT_USER
];
$params += $inparams;
$sql = "SELECT me.id,
me.rolename,
me.enroltime,
me.enroltype,
mh.name as hostname,
mc.fullname
FROM {mnetservice_enrol_enrolments} me
JOIN {context} ctx
ON ctx.instanceid = me.userid
AND ctx.contextlevel = :contextlevel
JOIN {mnet_host} mh
ON mh.id = me.hostid
JOIN {mnetservice_enrol_courses} mc
ON mc.remoteid = me.remotecourseid
WHERE me.userid = :userid
AND ctx.id {$insql}";
$mnetenrolments = $DB->get_records_sql($sql, $params);
foreach ($mnetenrolments as $mnetenrolment) {
// The core_enrol data export is organised in:
// {User Context}/User enrolments/data.json.
$data[] = (object) [
'host' => $mnetenrolment->hostname,
'remotecourseid' => $mnetenrolment->fullname,
'rolename' => $mnetenrolment->rolename,
'enroltime' => transform::datetime($mnetenrolment->enroltime),
'enroltype' => $mnetenrolment->enroltype
];
}
writer::with_context($contextuser)->export_data(
[get_string('privacy:metadata:mnetservice_enrol_enrolments', 'mnetservice_enrol')],
(object)$data
);
}
/**
* Delete all data for all users in the specified context.
*
* @param context $context The specific context to delete data for.
*/
public static function delete_data_for_all_users_in_context(\context $context) {
// Sanity check that context is at the User context level.
if ($context->contextlevel == CONTEXT_USER) {
static::delete_user_data($context->instanceid);
}
}
/**
* Delete multiple users within a single context.
*
* @param approved_userlist $userlist The approved context and user information to delete information for.
*/
public static function delete_data_for_users(approved_userlist $userlist) {
$context = $userlist->get_context();
if ($context instanceof \context_user) {
static::delete_user_data($context->instanceid);
}
}
/**
* Delete all user data for the specified user, in the specified contexts.
*
* @param approved_contextlist $contextlist The approved contexts and user information to delete information for.
*/
public static function delete_data_for_user(approved_contextlist $contextlist) {
if (empty($contextlist->count())) {
return;
}
$user = $contextlist->get_user();
foreach ($contextlist->get_contexts() as $context) {
// Verify the context is a user context and that the instanceid matches the userid of the contextlist.
if ($context->contextlevel == CONTEXT_USER && $context->instanceid == $user->id) {
// Get the data and write it.
static::delete_user_data($user->id);
}
}
}
/**
* This does the deletion of user data for the mnetservice_enrolments.
*
* @param int $userid The user ID
*/
protected static function delete_user_data(int $userid) {
global $DB;
// Because we only use user contexts the instance ID is the user ID.
$DB->delete_records('mnetservice_enrol_enrolments', ['userid' => $userid]);
}
}