<?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 include node.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class Twig_Node_Include extends Twig_Node implements Twig_NodeOutputInterface
{
    public function __construct(Twig_Node_Expression $expr, Twig_Node_Expression $variables = null, $only = false, $ignoreMissing = false, $lineno, $tag = null)
    {
        parent::__construct(array('expr' => $expr, 'variables' => $variables), array('only' => (bool) $only, 'ignore_missing' => (bool) $ignoreMissing), $lineno, $tag);
    }

    /**
     * Compiles the node to PHP.
     *
     * @param Twig_Compiler $compiler A Twig_Compiler instance
     */
    public function compile(Twig_Compiler $compiler)
    {
        $compiler->addDebugInfo($this);

        if ($this->getAttribute('ignore_missing')) {
            $compiler
                ->write("try {\n")
                ->indent()
            ;
        }

        $this->addGetTemplate($compiler);

        $compiler->raw('->display(');

        $this->addTemplateArguments($compiler);

        $compiler->raw(");\n");

        if ($this->getAttribute('ignore_missing')) {
            $compiler
                ->outdent()
                ->write("} catch (Twig_Error_Loader \$e) {\n")
                ->indent()
                ->write("// ignore missing template\n")
                ->outdent()
                ->write("}\n\n")
            ;
        }
    }

    protected function addGetTemplate(Twig_Compiler $compiler)
    {
        $method = $this->getNode('expr') instanceof Twig_Node_Expression_Constant ? 'loadTemplate' : 'resolveTemplate';
        $compiler
            ->write(sprintf('$this->env->%s(', $method))
            ->subcompile($this->getNode('expr'))
            ->raw(')')
        ;
    }

    protected function addTemplateArguments(Twig_Compiler $compiler)
    {
        if (null === $this->getNode('variables')) {
            $compiler->raw(false === $this->getAttribute('only') ? '$context' : 'array()');
        } elseif (false === $this->getAttribute('only')) {
            $compiler
                ->raw('array_merge($context, ')
                ->subcompile($this->getNode('variables'))
                ->raw(')')
            ;
        } else {
            $compiler->subcompile($this->getNode('variables'));
        }
    }
}
