<?php

namespace Mmoreramerino\GearmanBundle\Module;

use Symfony\Component\Config\FileLocator;
use Symfony\Component\Config\Loader\FileLoader;
use Symfony\Component\Config\Resource\DirectoryResource;

/**
 * Worker directory loader class
 *
 * @author Marc Morera <marc@ulabox.com>
 */
class WorkerDirectoryLoader extends FileLoader
{

    /**
     * Load files into path with .php extension.
     * This algorythm acts recursively and only return leaves.
     *
     * @param string $path Path to find
     * @param string $type Type
     * 
     * @return Array
     */
    public function load($path, $type = null)
    {
        $dir = $this->locator->locate($path);
        $files = array();

        foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($dir), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
            if (!$file->isFile() || '.php' !== substr($file->getFilename(), -4)) {
                continue;
            }
            $class = $this->findClass($file);

            if ($class) {
                $files[] = array(
                    'path'  =>  $file,
                    'class' =>  $class
                );
            }
        }
        return $files;
    }


    /**
     * Returns true if this class supports the given resource.
     *
     * @param mixed  $resource A resource
     * @param string $type     The resource type
     *
     * @return Boolean True if this class supports the given resource, false otherwise
     */
    public function supports($resource, $type = null)
    {
        return is_string($resource) && 'php' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'annotation' === $type);
    }

    /**
     * Returns the full class name for the first class in the file.
     *
     * @param string $file A PHP file path
     *
     * @return string|false Full class name if found, false otherwise
     */
    protected function findClass($file)
    {
        $class = false;
        $namespace = false;
        $tokens = token_get_all(file_get_contents($file));
        for ($i = 0, $count = count($tokens); $i < $count; $i++) {
            $token = $tokens[$i];

            if (!is_array($token)) {
                continue;
            }

            if (true === $class && T_STRING === $token[0]) {
                return $namespace.'\\'.$token[1];
            }

            if (true === $namespace && T_STRING === $token[0]) {
                $namespace = '';
                do {
                    $namespace .= $token[1];
                    $token = $tokens[++$i];
                } while ($i < $count && is_array($token) && in_array($token[0], array(T_NS_SEPARATOR, T_STRING)));
            }

            if (T_CLASS === $token[0]) {
                $class = true;
            }

            if (T_NAMESPACE === $token[0]) {
                $namespace = true;
            }
        }

        return false;
    }
}