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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 qtype_gapselect.
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 *
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 * @package    qtype_gapselect
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 * @copyright  2018 Andrew Nicols <andrew@nicols.co.uk>
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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 qtype_gapselect\privacy;
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use core_privacy\local\metadata\collection;
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use core_privacy\local\request\transform;
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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 qtype_gapselect implementing user_preference_provider.
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 *
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 * @copyright  2018 Andrew Nicols <andrew@nicols.co.uk>
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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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        // This component has data.
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        // We need to return default options that have been set a user preferences.
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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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    /**
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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('qtype_gapselect_defaultmark', 'privacy:preference:defaultmark');
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        $collection->add_user_preference('qtype_gapselect_penalty', 'privacy:preference:penalty');
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        $collection->add_user_preference('qtype_gapselect_shuffleanswers', 'privacy:preference:shuffleanswers');
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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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        $preference = get_user_preferences('qtype_gapselect_defaultmark', null, $userid);
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        if (null !== $preference) {
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            $desc = get_string('privacy:preference:defaultmark', 'qtype_gapselect');
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            writer::export_user_preference('qtype_gapselect', 'defaultmark', $preference, $desc);
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        }
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        $preference = get_user_preferences('qtype_gapselect_penalty', null, $userid);
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        if (null !== $preference) {
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            $desc = get_string('privacy:preference:penalty', 'qtype_gapselect');
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            writer::export_user_preference('qtype_gapselect', 'penalty', transform::percentage($preference), $desc);
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        }
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        $preference = get_user_preferences('qtype_gapselect_shuffleanswers', null, $userid);
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        if (null !== $preference) {
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            $desc = get_string('privacy:preference:shuffleanswers', 'qtype_gapselect');
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            writer::export_user_preference('qtype_gapselect', 'shuffleanswers', transform::yesno($preference), $desc);
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        }
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    }
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}