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<?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/>.

/**
 * A search class to control whether hidden / deleted questions are hidden in the list.
 *
 * @package   core_question
 * @copyright 2013 Ray Morris
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace core_question\bank\search;
defined('MOODLE_INTERNAL') || die();

/**
 * This class controls whether hidden / deleted questions are hidden in the list.
 *
 * @copyright 2013 Ray Morris
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class hidden_condition extends condition {
    /** @var bool Whether to include old "deleted" questions. */
    protected $hide;

/** @var string SQL fragment to add to the where clause. */
    protected $where;

/**
     * Constructor.
     * @param bool $hide whether to include old "deleted" questions.
     */
    public function __construct($hide = true) {
        $this->hide = $hide;
        if ($hide) {
            $this->where = 'q.hidden = 0';
        }
    }

public function where() {
        return  $this->where;
    }

/**
     * Print HTML to display the "Also show old questions" checkbox
     */
    public function display_options_adv() {
        echo \html_writer::start_div();
        echo \html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'showhidden',
                                                   'value' => '0', 'id' => 'showhidden_off'));
        echo \html_writer::checkbox('showhidden', '1', (! $this->hide), get_string('showhidden', 'question'),
                                   array('id' => 'showhidden_on', 'class' => 'searchoptions mr-1'));
        echo \html_writer::end_div() . "\n";
    }
}