File io/template/loader/StringTemplateLoader.class.php

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<?php
/**
 * This loader is a very simple one. Its input is a string containing the template source.
 * It doesn't supports caching so it always parses the input source.
 * @package     IO
 * @subpackage  Template\loader
 * @copyright   &copy; 2005-2019 PHPBoost
 * @license     https://www.gnu.org/licenses/gpl-3.0.html GNU/GPL-3.0
 * @author      Benoit SAUTEL <ben.popeye@phpboost.com>
 * @version     PHPBoost 5.2 - last update: 2014 12 22
 * @since       PHPBoost 3.0 - 2010 02 06
*/

class StringTemplateLoader implements TemplateLoader
{
    private $content = '';
    private $hashed_content;
    /**
     * @var DataStore
     */
    private static $parsing_cache = null;

    public static function __static()
    {
        self::$parsing_cache = new RAMDataStore();
    }

    /**
     * Constructs the {@link StringTemplateLoader} from the input source.
     * @param string $content The input source
     */
    public function __construct($content)
    {
        $this->content = $content;
        $this->hashed_content = md5($content);
    }

    /**
     * {@inheritdoc}
     */
    public function load()
    {
        if (self::is_cached($this->hashed_content))
        {
            return self::get_cached_template($this->hashed_content);
        }
        else
        {
            $parser = new TemplateSyntaxParser();
            $parsed_content = $parser->parse($this->content);
            self::register_cached_template($this->hashed_content, $parsed_content);
            return $parsed_content;
        }
    }

    private static function is_cached($hashed_content)
    {
        return self::$parsing_cache->contains($hashed_content);
    }

    private static function get_cached_template($hashed_content)
    {
        return self::$parsing_cache->get($hashed_content);
    }

    private static function register_cached_template($hashed_content, $parsed_content)
    {
        self::$parsing_cache->store($hashed_content, $parsed_content);
    }

    /**
     * {@inheritdoc}
     */
    public function supports_caching()
    {
        return false;
    }

    /**
     * {@inheritdoc}
     */
    public function get_cache_file_path()
    {
        return null;
    }
}

?>