CHIEFSOFT\ameye
317 lines
13 KiB
PHP
317 lines
13 KiB
PHP
<?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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namespace mod_bigbluebuttonbn\privacy;
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use core_privacy\local\metadata\collection;
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use core_privacy\local\request\approved_contextlist;
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use core_privacy\local\request\approved_userlist;
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use core_privacy\local\request\contextlist;
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use core_privacy\local\request\helper;
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use core_privacy\local\request\transform;
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use core_privacy\local\request\userlist;
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use core_privacy\local\request\writer;
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/**
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* Privacy class for requesting user data.
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*
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* @package mod_bigbluebuttonbn
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* @copyright 2018 - present, Blindside Networks Inc
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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* @author Jesus Federico (jesus [at] blindsidenetworks [dt] com)
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*/
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class provider implements
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// This plugin has data.
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\core_privacy\local\metadata\provider,
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// This plugin currently implements the original plugin\provider interface.
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\core_privacy\local\request\plugin\provider,
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// This plugin is capable of determining which users have data within it.
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\core_privacy\local\request\core_userlist_provider {
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/**
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* Returns metadata.
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*
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* @param collection $collection The initialised collection to add items to.
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* @return collection A listing of user data stored through this system.
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*/
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public static function get_metadata(collection $collection): collection {
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// The table bigbluebuttonbn stores only the room properties.
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// However, there is a chance that some personal information is stored as metadata.
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// This would be done in the column 'participants' where rules can be set to define BBB roles.
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// It is fair to say that only the userid is stored, which is useless if user is removed.
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// But if this is a concern a refactoring on the way the rules are stored will be required.
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$collection->add_database_table('bigbluebuttonbn', [
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'participants' => 'privacy:metadata:bigbluebuttonbn:participants',
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], 'privacy:metadata:bigbluebuttonbn');
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// The table bigbluebuttonbn_logs stores events triggered by users when using the plugin.
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// Some personal information along with the resource accessed is stored.
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$collection->add_database_table('bigbluebuttonbn_logs', [
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'userid' => 'privacy:metadata:bigbluebuttonbn_logs:userid',
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'timecreated' => 'privacy:metadata:bigbluebuttonbn_logs:timecreated',
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'meetingid' => 'privacy:metadata:bigbluebuttonbn_logs:meetingid',
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'log' => 'privacy:metadata:bigbluebuttonbn_logs:log',
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'meta' => 'privacy:metadata:bigbluebuttonbn_logs:meta',
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], 'privacy:metadata:bigbluebuttonbn_logs');
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$collection->add_database_table('bigbluebuttonbn_recordings', [
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'userid' => 'privacy:metadata:bigbluebuttonbn_logs:userid',
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], 'privacy:metadata:bigbluebuttonbn_recordings');
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// Personal information has to be passed to BigBlueButton.
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// This includes the user ID and fullname.
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$collection->add_external_location_link('bigbluebutton', [
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'userid' => 'privacy:metadata:bigbluebutton:userid',
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'fullname' => 'privacy:metadata:bigbluebutton:fullname',
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], 'privacy:metadata:bigbluebutton');
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return $collection;
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}
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/**
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* Get the list of contexts that contain user information for the specified user.
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*
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* @param int $userid The user to search.
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* @return contextlist $contextlist The list of contexts used in this plugin.
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*/
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public static function get_contexts_for_userid(int $userid): contextlist {
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// If user was already deleted, do nothing.
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if (!\core_user::get_user($userid)) {
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return new contextlist();
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}
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// Fetch all bigbluebuttonbn logs.
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$sql = "SELECT c.id
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FROM {context} c
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INNER JOIN {course_modules} cm
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ON cm.id = c.instanceid
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AND c.contextlevel = :contextlevel
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INNER JOIN {modules} m
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ON m.id = cm.module
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AND m.name = :modname
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INNER JOIN {bigbluebuttonbn} bigbluebuttonbn
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ON bigbluebuttonbn.id = cm.instance
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INNER JOIN {bigbluebuttonbn_logs} bigbluebuttonbnlogs
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ON bigbluebuttonbnlogs.bigbluebuttonbnid = bigbluebuttonbn.id
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WHERE bigbluebuttonbnlogs.userid = :userid";
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$params = [
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'modname' => 'bigbluebuttonbn',
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'contextlevel' => CONTEXT_MODULE,
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'userid' => $userid,
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];
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$contextlist = new contextlist();
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$contextlist->add_from_sql($sql, $params);
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return $contextlist;
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}
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/**
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* Export personal data for the given approved_contextlist. User and context information is contained within the contextlist.
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*
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* @param approved_contextlist $contextlist a list of contexts approved for export.
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*/
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public static function export_user_data(approved_contextlist $contextlist) {
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global $DB;
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// Filter out any contexts that are not related to modules.
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$cmids = array_reduce($contextlist->get_contexts(), function($carry, $context) {
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if ($context->contextlevel == CONTEXT_MODULE) {
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$carry[] = $context->instanceid;
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}
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return $carry;
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}, []);
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if (empty($cmids)) {
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return;
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}
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$user = $contextlist->get_user();
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// Get all the bigbluebuttonbn activities associated with the above course modules.
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$instanceidstocmids = self::get_instance_ids_to_cmids_from_cmids($cmids);
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$instanceids = array_keys($instanceidstocmids);
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list($insql, $inparams) = $DB->get_in_or_equal($instanceids, SQL_PARAMS_NAMED);
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$params = array_merge($inparams, ['userid' => $user->id]);
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$recordset = $DB->get_recordset_select(
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'bigbluebuttonbn_logs',
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"bigbluebuttonbnid $insql AND userid = :userid",
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$params,
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'timecreated, id'
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);
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self::recordset_loop_and_export($recordset, 'bigbluebuttonbnid', [],
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function($carry, $record) use ($user, $instanceidstocmids) {
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$carry[] = [
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'timecreated' => transform::datetime($record->timecreated),
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'meetingid' => $record->meetingid,
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'log' => $record->log,
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'meta' => $record->meta,
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];
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return $carry;
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},
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function($instanceid, $data) use ($user, $instanceidstocmids) {
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$context = \context_module::instance($instanceidstocmids[$instanceid]);
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$contextdata = helper::get_context_data($context, $user);
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$finaldata = (object) array_merge((array) $contextdata, ['logs' => $data]);
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helper::export_context_files($context, $user);
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writer::with_context($context)->export_data([], $finaldata);
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}
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);
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}
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/**
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* Delete all data for all users in the specified context.
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*
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* @param \context $context the context to delete in.
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*/
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public static function delete_data_for_all_users_in_context(\context $context) {
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global $DB;
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if (!$context instanceof \context_module) {
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return;
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}
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$instanceid = $DB->get_field('course_modules', 'instance', ['id' => $context->instanceid], MUST_EXIST);
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$DB->delete_records('bigbluebuttonbn_logs', ['bigbluebuttonbnid' => $instanceid]);
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}
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/**
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* Delete all user data for the specified user, in the specified contexts.
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*
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* @param approved_contextlist $contextlist a list of contexts approved for deletion.
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*/
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public static function delete_data_for_user(approved_contextlist $contextlist) {
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global $DB;
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$count = $contextlist->count();
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if (empty($count)) {
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return;
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}
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$userid = $contextlist->get_user()->id;
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foreach ($contextlist->get_contexts() as $context) {
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if (!$context instanceof \context_module) {
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return;
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}
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$instanceid = $DB->get_field('course_modules', 'instance', ['id' => $context->instanceid], MUST_EXIST);
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$DB->delete_records('bigbluebuttonbn_logs', ['bigbluebuttonbnid' => $instanceid, 'userid' => $userid]);
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}
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}
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/**
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* Return a dict of bigbluebuttonbn IDs mapped to their course module ID.
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*
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* @param array $cmids The course module IDs.
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* @return array In the form of [$bigbluebuttonbnid => $cmid].
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*/
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protected static function get_instance_ids_to_cmids_from_cmids(array $cmids) {
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global $DB;
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list($insql, $inparams) = $DB->get_in_or_equal($cmids, SQL_PARAMS_NAMED);
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$sql = "SELECT bigbluebuttonbn.id, cm.id AS cmid
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FROM {bigbluebuttonbn} bigbluebuttonbn
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JOIN {modules} m
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ON m.name = :bigbluebuttonbn
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JOIN {course_modules} cm
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ON cm.instance = bigbluebuttonbn.id
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AND cm.module = m.id
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WHERE cm.id $insql";
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$params = array_merge($inparams, ['bigbluebuttonbn' => 'bigbluebuttonbn']);
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return $DB->get_records_sql_menu($sql, $params);
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}
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/**
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* Loop and export from a recordset.
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*
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* @param \moodle_recordset $recordset The recordset.
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* @param string $splitkey The record key to determine when to export.
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* @param mixed $initial The initial data to reduce from.
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* @param callable $reducer The function to return the dataset, receives current dataset, and the current record.
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* @param callable $export The function to export the dataset, receives the last value from $splitkey and the dataset.
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* @return void
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*/
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protected static function recordset_loop_and_export(
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\moodle_recordset $recordset,
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$splitkey,
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$initial,
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callable $reducer,
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callable $export
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) {
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$data = $initial;
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$lastid = null;
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foreach ($recordset as $record) {
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if ($lastid && $record->{$splitkey} != $lastid) {
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$export($lastid, $data);
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$data = $initial;
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}
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$data = $reducer($data, $record);
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$lastid = $record->{$splitkey};
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}
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$recordset->close();
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if (!empty($lastid)) {
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$export($lastid, $data);
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}
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}
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/**
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* Get the list of users who have data within a context.
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*
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* @param userlist $userlist The userlist containing the list of users who have data in this context/plugin combination.
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*/
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public static function get_users_in_context(\core_privacy\local\request\userlist $userlist) {
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$context = $userlist->get_context();
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if (!$context instanceof \context_module) {
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return;
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}
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$params = [
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'instanceid' => $context->instanceid,
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'modulename' => 'bigbluebuttonbn',
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];
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$sql = "SELECT bnl.userid
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FROM {course_modules} cm
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JOIN {modules} m ON m.id = cm.module AND m.name = :modulename
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JOIN {bigbluebuttonbn} bn ON bn.id = cm.instance
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JOIN {bigbluebuttonbn_logs} bnl ON bnl.bigbluebuttonbnid = bn.id
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WHERE cm.id = :instanceid";
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$userlist->add_from_sql('userid', $sql, $params);
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}
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/**
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* Delete multiple users within a single context.
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*
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* @param approved_userlist $userlist The approved context and user information to delete information for.
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*/
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public static function delete_data_for_users(\core_privacy\local\request\approved_userlist $userlist) {
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global $DB;
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$context = $userlist->get_context();
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$cm = $DB->get_record('course_modules', ['id' => $context->instanceid]);
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list($userinsql, $userinparams) = $DB->get_in_or_equal($userlist->get_userids(), SQL_PARAMS_NAMED);
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$params = array_merge(['bigbluebuttonbnid' => $cm->instance], $userinparams);
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$sql = "bigbluebuttonbnid = :bigbluebuttonbnid AND userid {$userinsql}";
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$DB->delete_records_select('bigbluebuttonbn_logs', $sql, $params);
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}
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}
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