<?php

/*
 * This file is part of Twig.
 *
 * (c) 2011 Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Internal node used by the for node.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class Twig_Node_ForLoop extends Twig_Node
{
  public function __construct($lineno, $tag = null)
  {
    parent::__construct([], ['with_loop' => false, 'ifexpr' => false, 'else' => false], $lineno, $tag);
  }

  /**
   * Compiles the node to PHP.
   *
   * @param Twig_Compiler A Twig_Compiler instance
   */
  public function compile(Twig_Compiler $compiler)
  {
    if ($this->getAttribute('else')) {
      $compiler->write("\$context['_iterated'] = true;\n");
    }

    if ($this->getAttribute('with_loop')) {
      $compiler->write("++\$context['loop']['index0'];\n")->write("++\$context['loop']['index'];\n")->write("\$context['loop']['first'] = false;\n");

      if (!$this->getAttribute('ifexpr')) {
        $compiler->write("if (isset(\$context['loop']['length'])) {\n")->indent()->write("--\$context['loop']['revindex0'];\n")->write("--\$context['loop']['revindex'];\n")->write("\$context['loop']['last'] = 0 === \$context['loop']['revindex0'];\n")->outdent()->write("}\n");
      }
    }
  }
}
