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<?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 core_my.
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 *
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 * @package    core_my
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 * @copyright  2018 Zig Tan <zig@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 core_my\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\context;
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use core_privacy\local\request\contextlist;
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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 for core_my implementing metadata, plugin, and user_preference providers.
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 *
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 * @copyright  2018 Zig Tan <zig@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\user_preference_provider {
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    /**
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     * Returns meta data about this system.
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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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        $collection->add_user_preference(
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            'user_home_page_preference',
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            'privacy:metadata:core_my:preference:user_home_page_preference'
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        );
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        return $collection;
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    }
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    /**
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     * Export all user preferences for the plugin.
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     *
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     * @param   int $userid The userid of the user whose data is to be exported.
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     */
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    public static function export_user_preferences(int $userid) {
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        $userhomepagepreference = get_user_preferences('user_home_page_preference', null, $userid);
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        if (null !== $userhomepagepreference) {
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            writer::export_user_preference(
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                'core_my',
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                'user_home_page_preference',
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                $userhomepagepreference,
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                get_string('privacy:metadata:core_my:preference:user_home_page_preference', 'core_my')
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            );
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        }
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    }
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}