<?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(array(), array('with_loop' => false, 'ifexpr' => false, 'else' => false), $lineno, $tag);
    }

    /**
     * Compiles the node to PHP.
     *
     * @param Twig_Compiler $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")
                ;
            }
        }
    }
}