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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/>.

/**
 * Provides {@link tool_policy\output\renderer} class.
 *
 * @package     tool_policy
 * @category    output
 * @copyright   2018 David Mudrák <david@moodle.com>
 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace tool_policy\output;

defined('MOODLE_INTERNAL') || die();

use core\output\mustache_template_finder;
use plugin_renderer_base;
use renderable;
use Exception;

/**
 * Renderer for the policies plugin.
 *
 * @copyright 2018 David Mudrak <david@moodle.com>
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class renderer extends plugin_renderer_base {

/**
     * Overrides the parent so that templatable widgets are handled even without their explicit render method.
     *
     * @param renderable $widget
     * @return string
     */
    public function render(renderable $widget) {

$namespacedclassname = get_class($widget);
        $plainclassname = preg_replace('/^.*\\\/', '', $namespacedclassname);
        $rendermethod = 'render_'.$plainclassname;

if (method_exists($this, $rendermethod)) {
            // Explicit rendering method exists, fall back to the default behaviour.
            return parent::render($widget);
        }

$interfaces = class_implements($namespacedclassname);

if (isset($interfaces['templatable'])) {
            // Default implementation of template-based rendering.
            $data = $widget->export_for_template($this);
            return parent::render_from_template('tool_policy/'.$plainclassname, $data);

} else {
            return parent::render($widget);
        }
    }
}