<?php
/**
 * Orange Management
 *
 * PHP Version 7.2
 *
 * @package    phpOMS
 * @copyright  Dennis Eichhorn
 * @license    OMS License 1.0
 * @version    1.0.0
 * @link       http://website.orange-management.de
 */
declare(strict_types=1);

namespace phpOMS;

spl_autoload_register('\phpOMS\Autoloader::defaultAutoloader');

/**
 * Autoloader class.
 *
 * @package    phpOMS
 * @license    OMS License 1.0
 * @link       http://website.orange-management.de
 * @since      1.0.0
 */
final class Autoloader
{
    /**
     * Base paths for autoloading
     *
     * @var string[]
     * @since 1.0.0
     */
    private static $paths = [
        __DIR__ . '/../',
        __DIR__ . '/../../',
    ];

    /**
     * Constructor.
     *
     * @since  1.0.0
     * @codeCoverageIgnore
     */
    private function __construct()
    {

    }

    /**
     * Add base path for autoloading
     *
     * @param string $path Absolute base path with / at the end
     *
     * @return void
     *
     * @since  1.0.0
     */
    public static function addPath(string $path) : void
    {
        self::$paths[] = $path;
    }

    /**
     * Loading classes by namespace + class name.
     *
     * @param string $class Class path
     *
     * @example Autoloader::defaultAutoloader('\phpOMS\Autoloader') // void
     *
     * @return void
     *
     * @throws AutoloadException Throws this exception if the class to autoload doesn't exist. This could also be related to a wrong namespace/file path correlation.
     *
     * @since  1.0.0
     */
    public static function defaultAutoloader(string $class) : void
    {
        $class = \ltrim($class, '\\');
        $class = \str_replace(['_', '\\'], '/', $class);

        foreach (self::$paths as $path) {
            if (\file_exists($file = $path . $class . '.php')) {
                include_once $file;

                return;
            }
        }
    }

    /**
     * Check if class exists.
     *
     * @param string $class Class path
     *
     * @example Autoloader::exists('\phpOMS\Autoloader') // true
     *
     * @return bool
     *
     * @since  1.0.0
     */
    public static function exists(string $class) : bool
    {
        $class = \ltrim($class, '\\');
        $class = \str_replace(['_', '\\'], '/', $class);

        foreach (self::$paths as $path) {
            if (\file_exists($file = $path . $class . '.php')) {
                return true;
            }
        }

        return false;
    }
}
