<?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\Filter\GoogleClosure;

use Assetic\Asset\AssetInterface;
use Assetic\Util\ProcessBuilder;

/**
 * Filter for the Google Closure Compiler JAR.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
class CompilerJarFilter extends BaseCompilerFilter
{
    private $jarPath;
    private $javaPath;

    public function __construct($jarPath, $javaPath = '/usr/bin/java')
    {
        $this->jarPath = $jarPath;
        $this->javaPath = $javaPath;
    }

    public function filterDump(AssetInterface $asset)
    {
        $cleanup = array();

        $pb = new ProcessBuilder();
        $pb
            ->inheritEnvironmentVariables()
            ->add($this->javaPath)
            ->add('-jar')
            ->add($this->jarPath)
        ;

        if (null !== $this->compilationLevel) {
            $pb->add('--compilation_level')->add($this->compilationLevel);
        }

        if (null !== $this->jsExterns) {
            $cleanup[] = $externs = tempnam(sys_get_temp_dir(), 'assetic_google_closure_compiler');
            file_put_contents($externs, $this->jsExterns);
            $pb->add('--externs')->add($externs);
        }

        if (null !== $this->externsUrl) {
            $cleanup[] = $externs = tempnam(sys_get_temp_dir(), 'assetic_google_closure_compiler');
            file_put_contents($externs, file_get_contents($this->externsUrl));
            $pb->add('--externs')->add($externs);
        }

        if (null !== $this->excludeDefaultExterns) {
            $pb->add('--use_only_custom_externs');
        }

        if (null !== $this->formatting) {
            $pb->add('--formatting')->add($this->formatting);
        }

        if (null !== $this->useClosureLibrary) {
            $pb->add('--manage_closure_dependencies');
        }

        if (null !== $this->warningLevel) {
            $pb->add('--warning_level')->add($this->warningLevel);
        }

        $pb->add('--js')->add($cleanup[] = $input = tempnam(sys_get_temp_dir(), 'assetic_google_closure_compiler'));
        file_put_contents($input, $asset->getContent());

        $proc = $pb->getProcess();
        $code = $proc->run();
        array_map('unlink', $cleanup);

        if (0 < $code) {
            throw new \RuntimeException($proc->getErrorOutput());
        }

        $asset->setContent($proc->getOutput());
    }
}
