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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 block_myoverview.
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 *
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 * @package    block_myoverview
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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 block_myoverview\privacy;
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use core_privacy\local\request\user_preference_provider;
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use core_privacy\local\metadata\collection;
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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 block_myoverview.
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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 \core_privacy\local\metadata\provider, user_preference_provider {
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    /**
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     * Returns meta-data information about the myoverview block.
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     *
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     * @param  \core_privacy\local\metadata\collection $collection A collection of meta-data.
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     * @return \core_privacy\local\metadata\collection Return the collection of meta-data.
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     */
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    public static function get_metadata(collection $collection): collection {
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        $collection->add_user_preference('block_myoverview_user_sort_preference', 'privacy:metadata:overviewsortpreference');
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        $collection->add_user_preference('block_myoverview_user_view_preference', 'privacy:metadata:overviewviewpreference');
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        $collection->add_user_preference('block_myoverview_user_grouping_preference',
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            'privacy:metadata:overviewgroupingpreference');
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        $collection->add_user_preference('block_myoverview_user_paging_preference',
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            'privacy:metadata:overviewpagingpreference');
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        return $collection;
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    }
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    /**
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     * Export all user preferences for the myoverview block
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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('block_myoverview_user_sort_preference', null, $userid);
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        if (isset($preference)) {
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            writer::export_user_preference('block_myoverview',
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                'block_myoverview_user_sort_preference', get_string($preference, 'block_myoverview'),
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                get_string('privacy:metadata:overviewsortpreference', 'block_myoverview'));
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        }
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        $preference = get_user_preferences('block_myoverview_user_view_preference', null, $userid);
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        if (isset($preference)) {
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            writer::export_user_preference('block_myoverview',
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                'block_myoverview_user_view_preference',
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                get_string($preference, 'block_myoverview'),
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                get_string('privacy:metadata:overviewviewpreference', 'block_myoverview'));
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        }
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        $preference = get_user_preferences('block_myoverview_user_grouping_preference', null, $userid);
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        if (isset($preference)) {
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            writer::export_user_preference('block_myoverview',
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                'block_myoverview_user_grouping_preference',
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                get_string($preference, 'block_myoverview'),
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                get_string('privacy:metadata:overviewgroupingpreference', 'block_myoverview'));
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        }
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        $preferences = get_user_preferences(null, null, $userid);
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        foreach ($preferences as $name => $value) {
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            if ((substr($name, 0, 30) == 'block_myoverview_hidden_course')) {
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                writer::export_user_preference(
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                    'block_myoverview',
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                    $name,
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                    $value,
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                    get_string('privacy:request:preference:set', 'block_myoverview', (object) [
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                        'name' => $name,
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                        'value' => $value,
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                    ])
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                );
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            }
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        }
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        $preference = get_user_preferences('block_myoverview_user_paging_preference', null, $userid);
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        if (isset($preference)) {
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            \core_privacy\local\request\writer::export_user_preference('block_myoverview',
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                'block_myoverview_user_paging_preference',
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                $preference,
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                get_string('privacy:metadata:overviewpagingpreference', 'block_myoverview'));
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        }
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    }
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}