Proyectos de Subversion Moodle

<?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 core_mnet.

 *

 * @package    core_mnet

 * @copyright  2018 Carlos Escobedo <carlos@moodle.com>

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

namespace core_mnet\privacy;

defined('MOODLE_INTERNAL') || die();

use core_privacy\local\metadata\collection;

use core_privacy\local\request\contextlist;

use core_privacy\local\request\approved_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 core_mnet implementing null_provider.

 *

 * @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\subsystem\provider {

    /**

     * Returns meta data about this system.

     *

     * @param   collection $collection The initialised item collection to add items to.

     * @return  collection     A listing of user data stored through this system.

     */

    public static function get_metadata(collection $collection): collection {

        $sessionfields = [

                'userid' => 'privacy:metadata:mnet_session:userid',

                'username' => 'privacy:metadata:mnet_session:username',

                'token' => 'privacy:metadata:mnet_session:token',

                'mnethostid' => 'privacy:metadata:mnet_session:mnethostid',

                'useragent' => 'privacy:metadata:mnet_session:useragent',

                'expires' => 'privacy:metadata:mnet_session:expires',

        ];

        $collection->add_database_table('mnet_session', $sessionfields, 'privacy:metadata:mnet_session');

        $logfields = [

                'hostid' => 'privacy:metadata:mnet_log:hostid',

                'remoteid' => 'privacy:metadata:mnet_log:remoteid',

                'time' => 'privacy:metadata:mnet_log:time',

                'userid' => 'privacy:metadata:mnet_log:userid',

                'ip' => 'privacy:metadata:mnet_log:ip',

                'course' => 'privacy:metadata:mnet_log:course',

                'coursename' => 'privacy:metadata:mnet_log:coursename',

                'module' => 'privacy:metadata:mnet_log:module',

                'cmid' => 'privacy:metadata:mnet_log:cmid',

                'action' => 'privacy:metadata:mnet_log:action',

                'url' => 'privacy:metadata:mnet_log:url',

                'info' => 'privacy:metadata:mnet_log:info',

        ];

        $collection->add_database_table('mnet_log', $logfields, 'privacy:metadata:mnet_log');

        $externalfields = [

                'address' => 'privacy:metadata:mnet_external:address',

                'alternatename' => 'privacy:metadata:mnet_external:alternatename',

                'autosubscribe' => 'privacy:metadata:mnet_external:autosubscribe',

                'calendartype' => 'privacy:metadata:mnet_external:calendartype',

                'city' => 'privacy:metadata:mnet_external:city',

                'country' => 'privacy:metadata:mnet_external:country',

                'currentlogin' => 'privacy:metadata:mnet_external:currentlogin',

                'department' => 'privacy:metadata:mnet_external:department',

                'description' => 'privacy:metadata:mnet_external:description',

                'email' => 'privacy:metadata:mnet_external:email',

                'emailstop' => 'privacy:metadata:mnet_external:emailstop',

                'firstaccess' => 'privacy:metadata:mnet_external:firstaccess',

                'firstname' => 'privacy:metadata:mnet_external:firstname',

                'firstnamephonetic' => 'privacy:metadata:mnet_external:firstnamephonetic',

                'id' => 'privacy:metadata:mnet_external:id',

                'idnumber' => 'privacy:metadata:mnet_external:idnumber',

                'imagealt' => 'privacy:metadata:mnet_external:imagealt',

                'institution' => 'privacy:metadata:mnet_external:institution',

                'lang' => 'privacy:metadata:mnet_external:lang',

                'lastaccess' => 'privacy:metadata:mnet_external:lastaccess',

                'lastlogin' => 'privacy:metadata:mnet_external:lastlogin',

                'lastname' => 'privacy:metadata:mnet_external:lastname',

                'lastnamephonetic' => 'privacy:metadata:mnet_external:lastnamephonetic',

                'maildigest' => 'privacy:metadata:mnet_external:maildigest',

                'maildisplay' => 'privacy:metadata:mnet_external:maildisplay',

                'middlename' => 'privacy:metadata:mnet_external:middlename',

                'phone1' => 'privacy:metadata:mnet_external:phone1',

                'pnone2' => 'privacy:metadata:mnet_external:phone2',

                'picture' => 'privacy:metadata:mnet_external:picture',

                'policyagreed' => 'privacy:metadata:mnet_external:policyagreed',

                'suspended' => 'privacy:metadata:mnet_external:suspended',

                'timezone' => 'privacy:metadata:mnet_external:timezone',

                'trackforums' => 'privacy:metadata:mnet_external:trackforums',

                'trustbitmask' => 'privacy:metadata:mnet_external:trustbitmask',

                'username' => 'privacy:metadata:mnet_external:username',

        ];

        $collection->add_external_location_link('moodle', $externalfields, 'privacy:metadata:external:moodle');

        $collection->add_external_location_link('mahara', $externalfields, 'privacy:metadata:external:mahara');

        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 list of contexts used in this plugin.

     */

    public static function get_contexts_for_userid(int $userid): contextlist {

        $sql = "SELECT ctx.id

                  FROM {mnet_log} ml

                  JOIN {context} ctx ON ctx.instanceid = ml.userid AND ctx.contextlevel = :contextlevel

                 WHERE ml.userid = :userid";

        $params = ['userid' => $userid, 'contextlevel' => CONTEXT_USER];

        $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): void {

        $context = $userlist->get_context();

        if (!$context instanceof \context_user) {

            return;

        }

        $sql = "SELECT userid

                  FROM {mnet_log}

                 WHERE userid = ?";

        $params = [$context->instanceid];

        $userlist->add_from_sql('userid', $sql, $params);

    }

    /**

     * Export all user data for the specified user, in the specified contexts, using the supplied exporter instance.

     *

     * @param   approved_contextlist $contextlist The approved contexts to export information for.

     */

    public static function export_user_data(approved_contextlist $contextlist): void {

        global $DB;

        $context = \context_user::instance($contextlist->get_user()->id);

        $sql = "SELECT ml.id, mh.wwwroot, mh.name, ml.remoteid, ml.time, ml.userid, ml.ip, ml.course,

                       ml.coursename, ml.module, ml.cmid, ml.action, ml.url, ml.info

                  FROM {mnet_log} ml

                  JOIN {mnet_host} mh ON mh.id = ml.hostid

                 WHERE ml.userid = :userid

              ORDER BY mh.name, ml.coursename";

        $params = ['userid' => $contextlist->get_user()->id];

        $data = [];

        $lastcourseid = null;

        $logentries = $DB->get_recordset_sql($sql, $params);

        foreach ($logentries as $logentry) {

            $item = (object) [

                    'time' => transform::datetime($logentry->time),

                    'remoteid' => $logentry->remoteid,

                    'ip' => $logentry->ip,

                    'course' => $logentry->course,

                    'coursename' => format_string($logentry->coursename),

                    'module' => $logentry->module,

                    'cmid' => $logentry->cmid,

                    'action' => $logentry->action,

                    'url' => $logentry->url,

                    'info' => format_string($logentry->info),

            ];

            $item->externalhost =

                    ($logentry->name == '') ? preg_replace('#^https?://#', '', $logentry->wwwroot) :

                            preg_replace('#^https?://#', '', $logentry->name);

            if ($lastcourseid && $lastcourseid != $logentry->course) {

                $path = [get_string('mnet', 'core_mnet'), $data[0]->externalhost, $data[0]->coursename];

                writer::with_context($context)->export_data($path, (object) $data);

                $data = [];

            }

            $data[] = $item;

            $lastcourseid = $logentry->course;

        }

        $logentries->close();

        $path = [get_string('mnet', 'core_mnet'), $item->externalhost, $item->coursename];

        writer::with_context($context)->export_data($path, (object) $data);

    }

    /**

     * Delete all personal data for all users in the specified context.

     *

     * @param \context $context Context to delete data from.

     */

    public static function delete_data_for_all_users_in_context(\context $context): void {

        global $DB;

        if ($context->contextlevel != CONTEXT_USER) {

            return;

        }

        $DB->delete_records('mnet_log', ['userid' => $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): void {

        global $DB;

        $context = $userlist->get_context();

        if ($context instanceof \context_user) {

            $DB->delete_records('mnet_log', ['userid' => $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): void {

        global $DB;

        if (empty($contextlist->count())) {

            return;

        }

        $userid = $contextlist->get_user()->id;

        foreach ($contextlist->get_contexts() as $context) {

            if ($context->contextlevel != CONTEXT_USER) {

                continue;

            }

            if ($context->instanceid == $userid) {

                // Because we only use user contexts the instance ID is the user ID.

                $DB->delete_records('mnet_log', ['userid' => $context->instanceid]);

            }

        }

    }

}