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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/>.
/**
* Custom Moodle engine for mustache.
*
* @copyright 2019 Ryan Wyllie <ryan@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core\output;
/**
* Custom Moodle engine for mustache.
*
* @copyright 2019 Ryan Wyllie <ryan@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class mustache_engine extends \Mustache_Engine {
/**
* @var mustache_helper_collection
*/
private $helpers;
/**
* @var string[] Names of helpers that aren't allowed to be called within other helpers.
*/
private $blacklistednestedhelpers = [];
/**
* Mustache engine constructor.
*
* This provides an additional option to the parent \Mustache_Engine implementation:
* $options = [
* // A list of helpers (by name) to prevent from executing within the rendering
* // of other helpers.
* 'blacklistednestedhelpers' => ['js']
* ];
* @param array $options [description]
*/
public function __construct(array $options = []) {
if (isset($options['blacklistednestedhelpers'])) {
$this->blacklistednestedhelpers = $options['blacklistednestedhelpers'];
}
parent::__construct($options);
}
/**
* Get the current set of Mustache helpers.
*
* @see Mustache_Engine::setHelpers
*
* @return \Mustache_HelperCollection
*/
public function getHelpers()
{
if (!isset($this->helpers)) {
$this->helpers = new mustache_helper_collection(null, $this->blacklistednestedhelpers);
}
return $this->helpers;
}
}