<?php

/*

 * This file is part of the Assetic package, an OpenSky project.

 *

 * (c) 2010-2011 OpenSky Project Inc

 *

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

 * file that was distributed with this source code.

 */

namespace Assetic\Extension\Twig;

use Assetic\Asset\AssetInterface;

class AsseticNode extends \Twig_Node

{

    /**

     * Constructor.

     *

     * Available attributes:

     *

     *  * debug:    The debug mode

     *  * combine:  Whether to combine assets

     *  * var_name: The name of the variable to expose to the body node

     *

     * @param AssetInterface     $asset      The asset

     * @param Twig_NodeInterface $body       The body node

     * @param array              $inputs     An array of input strings

     * @param array              $filters    An array of filter strings

     * @param string             $name       The name of the asset

     * @param array              $attributes An array of attributes

     * @param integer            $lineno     The line number

     * @param string             $tag        The tag name

     */

    public function __construct(AssetInterface $asset, \Twig_NodeInterface $body, array $inputs, array $filters, $name, array $attributes = array(), $lineno = 0, $tag = null)

    {

        $nodes = array('body' => $body);

        $attributes = array_replace(

            array('debug' => null, 'combine' => null, 'var_name' => 'asset_url'),

            $attributes,

            array('asset' => $asset, 'inputs' => $inputs, 'filters' => $filters, 'name' => $name)

        );

        parent::__construct($nodes, $attributes, $lineno, $tag);

    }

    public function compile(\Twig_Compiler $compiler)

    {

        $compiler->addDebugInfo($this);

        $combine = $this->getAttribute('combine');

        $debug = $this->getAttribute('debug');

        if (null === $combine && null !== $debug) {

            $combine = !$debug;

        }

        if (null === $combine) {

            $compiler

                ->write("if (isset(\$context['assetic']['debug']) && \$context['assetic']['debug']) {\n")

                ->indent()

            ;

            $this->compileDebug($compiler);

            $compiler

                ->outdent()

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

                ->indent()

            ;

            $this->compileAsset($compiler, $this->getAttribute('asset'), $this->getAttribute('name'));

            $compiler

                ->outdent()

                ->write("}\n")

            ;

        } elseif ($combine) {

            $this->compileAsset($compiler, $this->getAttribute('asset'), $this->getAttribute('name'));

        } else {

            $this->compileDebug($compiler);

        }

        $compiler

            ->write('unset($context[')

            ->repr($this->getAttribute('var_name'))

            ->raw("]);\n")

        ;

    }

    protected function compileDebug(\Twig_Compiler $compiler)

    {

        $i = 0;

        foreach ($this->getAttribute('asset') as $leaf) {

            $leafName = $this->getAttribute('name').'_'.$i++;

            $this->compileAsset($compiler, $leaf, $leafName);

        }

    }

    protected function compileAsset(\Twig_Compiler $compiler, AssetInterface $asset, $name)

    {

        $compiler

            ->write("// asset \"$name\"\n")

            ->write('$context[')

            ->repr($this->getAttribute('var_name'))

            ->raw('] = ')

        ;

        $this->compileAssetUrl($compiler, $asset, $name);

        $compiler

            ->raw(";\n")

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

        ;

    }

    protected function compileAssetUrl(\Twig_Compiler $compiler, AssetInterface $asset, $name)

    {

        $compiler->repr($asset->getTargetPath());

    }

}