autoload.php

<?php

class MdsColliveryAutoLoader
{
    /**
     * @var array
     */
    protected static $classMap = [
        'MdsCollivery' => '\MdsSupportingClasses\Collivery',
        'EnvironmentInformationBag' => '\MdsSupportingClasses\EnvironmentInformationBag',
        'GitHubPluginUpdater' => '\MdsSupportingClasses\GitHubPluginUpdater',
        'MdsCache' => '\MdsSupportingClasses\MdsCache',
        'MdsCheckoutFields' => '\MdsSupportingClasses\MdsCheckoutFields',
        'MdsColliveryService' => '\MdsSupportingClasses\MdsColliveryService',
        'MdsLogger' => '\MdsSupportingClasses\MdsLogger',
        'Money' => '\MdsSupportingClasses\Money',
        'ParseDown' => '\MdsSupportingClasses\ParseDown',
        'UnitConverter' => '\MdsSupportingClasses\UnitConverter',
        'View' => '\MdsSupportingClasses\View',
        'ExceptionMiddleware' => '\MdsExceptions\ExceptionMiddleware',
        'InvalidAddressDataException' => '\MdsExceptions\InvalidAddressDataException',
        'InvalidCartPackageException' => '\MdsExceptions\InvalidCartPackageException',
        'InvalidColliveryDataException' => '\MdsExceptions\InvalidColliveryDataException',
        'InvalidResourceDataException' => '\MdsExceptions\InvalidResourceDataException',
        'InvalidServiceException' => '\MdsExceptions\InvalidServiceException',
        'OrderAlreadyProcessedException' => '\MdsExceptions\OrderAlreadyProcessedException',
        'ProductOutOfStockException' => '\MdsExceptions\ProductOutOfStockException',
    ];

    /**
     * @param $class
     */
    public static function autoload($class)
    {
        $classParts = explode('\\', $class);
        $vendor = array_shift($classParts);
        if ($vendor === 'MdsSupportingClasses' || $vendor === 'MdsExceptions') {
            if (file_exists(_MDS_DIR_.'/'.$vendor.'/'.implode('/', $classParts).'.php')) {
                if (!class_exists($vendor.'\\'.implode('/', $classParts))) {
                    require _MDS_DIR_.'/'.$vendor.'/'.implode('/', $classParts).'.php';
                }
            }
        } elseif (array_key_exists($class, self::$classMap)) {
            class_alias(self::$classMap[$class], $class);
        }
    }
}

spl_autoload_register(
    'MdsColliveryAutoLoader::autoload',
    true
);