<?php

/*
 * This file is part of Phraseanet
 *
 * (c) 2005-2012 Alchemy
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Alchemy\Phrasea\Loader;

require_once __DIR__ . "/../../../../vendor/symfony/symfony/src/Symfony/Component/ClassLoader/UniversalClassLoader.php";

use Symfony\Component\ClassLoader\UniversalClassLoader;

/**
 *
 * @license     http://opensource.org/licenses/gpl-3.0 GPLv3
 * @link        www.phraseanet.com
 */
class Autoloader extends UniversalClassLoader
{
    /**
     * An array of path to check
     * @var type
     */
    private $paths = array();
    private $classmap = array();

    /**
     * Construct a new phrasea Autoloader
     * Because some custom classes from library folder might be
     * overwritten in config folder
     * Phraseanet Loader look classes in configuration folders first
     * then check library folder if no classes where matched
     */
    public function __construct()
    {
        $this->paths['config'] = __DIR__ . '/../../../../config/classes/';
        $this->paths['library'] = __DIR__ . '/../../../classes/';

        $getComposerClassMap = function() {
                return require realpath(__DIR__ . '/../../../../vendor/composer/autoload_classmap.php');
            };

        $this->classmap = $getComposerClassMap();
    }

    /**
     * {@inheritdoc}
     */
    public function findFile($class)
    {
        if ( ! $file = $this->checkFile($class)) {
            $file = parent::findFile($class);
        }

        return $file;
    }

    /**
     * Add a path to look for autoloading phraseanet classes
     * @param string $name
     * @param string $path
     */
    public function addPath($name, $path)
    {
        $this->paths[$name] = \p4string::addEndSlash($path);
    }

    /**
     * Check whether a class with $class name exists
     * foreach declared paths
     * @param  string $class
     * @return mixed  string|null
     */
    private function checkFile($classname)
    {
        if (isset($this->classmap[$classname])) {
            return $this->classmap[$classname];
        }

        $normalized_classname = str_replace('_', '/', $classname);

        foreach ($this->paths as $path) {
            $file = $path . $normalized_classname . '.class.php';

            if (file_exists($file)) {
                return $file;
            }
        }
    }

    /**
     * Get Paths where classes are checked for autoloading
     * @return Array
     */
    public function getPaths()
    {
        return $this->paths;
    }
}