<?php

/*

 * This file is part of the Symfony package.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

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

 * file that was distributed with this source code.

 */

namespace Symfony\Component\Config\Exception;

/**

 * Exception class for when a resource cannot be loaded or imported.

 *

 * @author Ryan Weaver <ryan@thatsquality.com>

 */

class FileLoaderLoadException extends \Exception

{

    /**

     * @param  string    $resource The resource that could not be imported

     * @param  string    $sourceResource The original resource importing the new resource

     * @param  integer   $code     The error code

     * @param  Exception $previous A previous exception

     */

    public function __construct($resource, $sourceResource = null, $code = null, $previous = null)

    {

        if (null === $sourceResource) {

            $message = sprintf('Cannot load resource "%s".', $this->varToString($resource));

        } else {

            $message = sprintf('Cannot import resource "%s" from "%s".', $this->varToString($resource), $this->varToString($sourceResource));

        }

        // Is the resource located inside a bundle?

        if ('@' === $resource[0]) {

            $parts = explode(DIRECTORY_SEPARATOR, $resource);

            $bundle = substr($parts[0], 1);

            $message .= ' '.sprintf('Make sure the "%s" bundle is correctly registered and loaded in the application kernel class.', $bundle);

        }

        parent::__construct($message, $code, $previous);

    }

    protected function varToString($var)

    {

        if (is_object($var)) {

            return sprintf('Object(%s)', get_class($var));

        }

        if (is_array($var)) {

            $a = array();

            foreach ($var as $k => $v) {

                $a[] = sprintf('%s => %s', $k, $this->varToString($v));

            }

            return sprintf("Array(%s)", implode(', ', $a));

        }

        if (is_resource($var)) {

            return sprintf('Resource(%s)', get_resource_type($var));

        }

        if (null === $var) {

            return 'null';

        }

        if (false === $var) {

            return 'false';

        }

        if (true === $var) {

            return 'true';

        }

        return (string) $var;

    }

}