<?php

/*

 * This file is part of Twig.

 *

 * (c) 2009 Fabien Potencier

 * (c) 2009 Armin Ronacher

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

/**

 * Represents an if node.

 *

 * @package    twig

 * @author     Fabien Potencier <fabien@symfony.com>

 */

class Twig_Node_If extends Twig_Node

{

    public function __construct(Twig_NodeInterface $tests, Twig_NodeInterface $else = null, $lineno, $tag = null)

    {

        parent::__construct(array('tests' => $tests, 'else' => $else), array(), $lineno, $tag);

    }

    /**

     * Compiles the node to PHP.

     *

     * @param Twig_Compiler A Twig_Compiler instance

     */

    public function compile(Twig_Compiler $compiler)

    {

        $compiler->addDebugInfo($this);

        for ($i = 0; $i < count($this->getNode('tests')); $i += 2) {

            if ($i > 0) {

                $compiler

                    ->outdent()

                    ->write("} elseif (")

                ;

            } else {

                $compiler

                    ->write('if (')

                ;

            }

            $compiler

                ->subcompile($this->getNode('tests')->getNode($i))

                ->raw(") {\n")

                ->indent()

                ->subcompile($this->getNode('tests')->getNode($i + 1))

            ;

        }

        if ($this->hasNode('else') && null !== $this->getNode('else')) {

            $compiler

                ->outdent()

                ->write("} else {\n")

                ->indent()

                ->subcompile($this->getNode('else'))

            ;

        }

        $compiler

            ->outdent()

            ->write("}\n");

    }

}