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/>.

/**

 * Point of View privacy

 *

 *

 * @package    block_point_view

 * @copyright  2020 Quentin Fombaron

 * @author     Quentin Fombaron <q.fombaron@outlook.fr>

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

 */

namespace block_point_view\privacy;

use core_privacy\local\metadata\collection;

use core_privacy\local\request\approved_userlist;

use core_privacy\local\request\contextlist;

use core_privacy\local\request\approved_contextlist;

use core_privacy\local\request\userlist;

/**

 * Class provider

 *

 * @package block_point_view

 * @copyright  2020 Quentin Fombaron

 * @author     Quentin Fombaron <q.fombaron@outlook.fr>

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

 */

class provider implements

    // This tool stores user data.

    \core_privacy\local\metadata\provider,

    // This plugin is capable of determining which users have data within it.

    \core_privacy\local\request\core_userlist_provider,

    // This tool may provide access to and deletion of user data.

    \core_privacy\local\request\plugin\provider {

    /**

     * Point of View Metadata

     *

     * @param collection $collection

     * @return collection

     */

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

        $collection->add_database_table(

            'block_point_view',

            [

                'courseid' => 'privacy:metadata:activity_votes_database:courseid',

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

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

                'vote' => 'privacy:metadata:activity_votes_database:vote',

            ],

            'privacy:metadata:block_point_view'

        );

        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 DISTINCT ctx.id

                FROM {block_point_view} bpv

                JOIN {context} ctx

                    ON ctx.instanceid = bpv.userid

                        AND ctx.contextlevel = :contextlevel

                WHERE bpv.userid = :userid';

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

        $contextlist = new contextlist();

        $contextlist->add_from_sql($sql, $params);

        return $contextlist;

    }

    /**

     * Export all user data for the specified user, in the specified contexts.

     *

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

     * @throws \coding_exception

     * @throws \dml_exception

     */

    public static function export_user_data(approved_contextlist $contextlist) {

        $pointviewdata = [];

        $results = static::get_records($contextlist->get_user()->id);

        foreach ($results as $result) {

            $pointviewdata[] = (object) [

                'courseid' => $result->courseid,

                'cmid' => $result->cmid,

                'vote' => $result->vote,

            ];

        }

        if (!empty($pointviewdata)) {

            $data = (object) [

                'votes' => $pointviewdata,

            ];

            \core_privacy\local\request\writer::with_context($contextlist->current())->export_data([

                get_string('pluginname', 'block_point_view')], $data);

        }

    }

    /**

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

     *

     * @param \context $context The specific context to delete data for.

     * @throws \dml_exception

     */

    public static function delete_data_for_all_users_in_context(\context $context) {

        if ($context instanceof \context_user) {

            static::delete_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.

     * @throws \dml_exception

     */

    public static function delete_data_for_user(approved_contextlist $contextlist) {

        static::delete_data($contextlist->get_user()->id);

    }

    /**

     * Delete data related to a userid.

     *

     * @param  int $userid The user ID

     * @throws \dml_exception

     */

    protected static function delete_data($userid) {

        global $DB;

        $DB->delete_records('block_point_view', ['userid' => $userid]);

    }

    /**

     * Get records related to this plugin and user.

     *

     * @param  int $userid The user ID

     * @return array An array of records.

     * @throws \dml_exception

     */

    protected static function get_records($userid) {

        global $DB;

        return $DB->get_records('block_point_view', ['userid' => $userid]);

    }

    /**

     * Get the list of users who have data within a 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 = [

            'contextid' => $context->id,

            'contextuser' => CONTEXT_USER,

        ];

        $sql = "SELECT bpv.userid as userid

                  FROM {block_point_view} bpv

                  JOIN {context} ctx

                       ON ctx.instanceid = bpv.userid

                       AND ctx.contextlevel = :contextuser

                 WHERE ctx.id = :contextid";

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

    }

    /**

     * Delete multiple users within a single context.

     *

     * @param   approved_userlist $userlist The approved context and user information to delete information for.

     * @throws \dml_exception

     */

    public static function delete_data_for_users(approved_userlist $userlist) {

        $context = $userlist->get_context();

        if ($context instanceof \context_user) {

            static::delete_data($context->instanceid);

        }

    }

}