298 lines
11 KiB
PHP
298 lines
11 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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/**
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* Privacy Subsystem implementation for mod_customcert.
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*
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* @package mod_customcert
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* @copyright 2018 Mark Nelson <markn@moodle.com>
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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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namespace mod_customcert\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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defined('MOODLE_INTERNAL') || die();
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/**
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* Privacy Subsystem implementation for mod_customcert.
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*
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* @copyright 2018 Mark Nelson <markn@moodle.com>
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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 provider implements
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\core_privacy\local\metadata\provider,
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\core_privacy\local\request\plugin\provider,
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\core_privacy\local\request\core_userlist_provider {
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/**
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* Return the fields which contain personal data.
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*
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* @param collection $items a reference to the collection to use to store the metadata.
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* @return collection the updated collection of metadata items.
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*/
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public static function get_metadata(collection $items) : collection {
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$items->add_database_table(
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'customcert_issues',
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[
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'userid' => 'privacy:metadata:customcert_issues:userid',
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'customcertid' => 'privacy:metadata:customcert_issues:customcertid',
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'code' => 'privacy:metadata:customcert_issues:code',
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'emailed' => 'privacy:metadata:customcert_issues:emailed',
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'timecreated' => 'privacy:metadata:customcert_issues:timecreated',
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],
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'privacy:metadata:customcert_issues'
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);
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return $items;
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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 userid.
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* @return contextlist the list of contexts containing user info for the user.
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*/
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public static function get_contexts_for_userid(int $userid) : contextlist {
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$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 = :modulename
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INNER JOIN {customcert} customcert
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ON customcert.id = cm.instance
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INNER JOIN {customcert_issues} customcertissues
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ON customcertissues.customcertid = customcert.id
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WHERE customcertissues.userid = :userid";
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$params = [
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'modulename' => 'customcert',
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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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* 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(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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// Fetch all users who have a custom certificate.
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$sql = "SELECT customcertissues.userid
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FROM {course_modules} cm
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JOIN {modules} m
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ON m.id = cm.module AND m.name = :modname
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JOIN {customcert} customcert
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ON customcert.id = cm.instance
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JOIN {customcert_issues} customcertissues
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ON customcertissues.customcertid = customcert.id
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WHERE cm.id = :cmid";
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$params = [
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'cmid' => $context->instanceid,
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'modname' => 'customcert',
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];
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$userlist->add_from_sql('userid', $sql, $params);
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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 = $contextlist->get_user();
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// Get all the customcert activities associated with the above course modules.
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$customcertidstocmids = self::get_customcert_ids_to_cmids_from_cmids($cmids);
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list($insql, $inparams) = $DB->get_in_or_equal(array_keys($customcertidstocmids), SQL_PARAMS_NAMED);
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$params = array_merge($inparams, ['userid' => $user->id]);
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$recordset = $DB->get_recordset_select('customcert_issues', "customcertid $insql AND userid = :userid",
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$params, 'timecreated, id ASC');
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self::recordset_loop_and_export($recordset, 'customcertid', [], function($carry, $record) {
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$carry[] = [
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'code' => $record->code,
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'emailed' => transform::yesno($record->emailed),
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'timecreated' => transform::datetime($record->timecreated)
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];
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return $carry;
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}, function($customcertid, $data) use ($user, $customcertidstocmids) {
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$context = \context_module::instance($customcertidstocmids[$customcertid]);
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$contextdata = helper::get_context_data($context, $user);
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$finaldata = (object) array_merge((array) $contextdata, ['issues' => $data]);
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helper::export_context_files($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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* 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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if (!$cm = get_coursemodule_from_id('customcert', $context->instanceid)) {
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return;
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}
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$DB->delete_records('customcert_issues', ['customcertid' => $cm->instance]);
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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 $DB;
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if (empty($contextlist->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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continue;
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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('customcert_issues', ['customcertid' => $instanceid, 'userid' => $userid]);
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}
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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(approved_userlist $userlist) {
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global $DB;
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$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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$cm = get_coursemodule_from_id('customcert', $context->instanceid);
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if (!$cm) {
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// Only customcert module will be handled.
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return;
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}
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$userids = $userlist->get_userids();
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list($usersql, $userparams) = $DB->get_in_or_equal($userids, SQL_PARAMS_NAMED);
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$select = "customcertid = :customcertid AND userid $usersql";
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$params = ['customcertid' => $cm->instance] + $userparams;
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$DB->delete_records_select('customcert_issues', $select, $params);
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}
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/**
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* Return a list of Customcert IDs mapped to their course module ID.
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*
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* @param array $cmids The course module IDs.
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* @return array In the form of [$customcertid => $cmid].
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*/
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protected static function get_customcert_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 customcert.id, cm.id AS cmid
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FROM {customcert} customcert
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JOIN {modules} m
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ON m.name = :modulename
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JOIN {course_modules} cm
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ON cm.instance = customcert.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, ['modulename' => 'customcert']);
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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(\moodle_recordset $recordset, $splitkey, $initial,
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callable $reducer, callable $export) {
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$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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