<?php

/*
 * This file is part of Twig.
 *
 * (c) 2012 Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
class Twig_Extension_StringLoader extends Twig_Extension
{
  /**
   * {@inheritdoc}
   */
  public function getFunctions()
  {
    return [new Twig_SimpleFunction('template_from_string', 'twig_template_from_string', ['needs_environment' => true])];
  }

  /**
   * {@inheritdoc}
   */
  public function getName()
  {
    return 'string_loader';
  }
}

/**
 * Loads a template from a string.
 *
 * <pre>
 * {{ include(template_from_string("Hello {{ name }}")) }}
 * </pre>
 *
 * @param Twig_Environment $env      A Twig_Environment instance
 * @param string           $template A template as a string
 *
 * @return Twig_Template A Twig_Template instance
 */
function twig_template_from_string(Twig_Environment $env, $template)
{
  $name = sprintf('__string_template__%s', hash('sha256', uniqid(mt_rand(), true), false));

  $loader = new Twig_Loader_Chain([new Twig_Loader_Array([$name => $template]), ($current = $env->getLoader())]);

  $env->setLoader($loader);
  try {
    $template = $env->loadTemplate($name);
  } catch (Exception $e) {
    $env->setLoader($current);

    throw $e;
  }
  $env->setLoader($current);

  return $template;
}
