class AddAutoMappingConfigurationPass

class AddAutoMappingConfigurationPass implements CompilerPassInterface {
    public function process(ContainerBuilder $container) : void {
        if (!$container->hasParameter('validator.auto_mapping') || !$container->hasDefinition('validator.builder')) {
            return;
        }
        $config = $container->getParameter('validator.auto_mapping');
        $globalNamespaces = [];
        $servicesToNamespaces = [];
        foreach ($config as $namespace => $value) {
            if ([] === $value['services']) {
                $globalNamespaces[] = $namespace;
                continue;
            }
            foreach ($value['services'] as $service) {
                $servicesToNamespaces[$service][] = $namespace;
            }
        }
        $validatorBuilder = $container->getDefinition('validator.builder');
        foreach ($container->findTaggedServiceIds('validator.auto_mapper') as $id => $tags) {
            $regexp = $this->getRegexp(array_merge($globalNamespaces, $servicesToNamespaces[$id] ?? []));
            $validatorBuilder->addMethodCall('addLoader', [
                new Reference($id),
            ]);
            $container->getDefinition($id)
                ->setArgument('$classValidatorRegexp', $regexp);
        }
        $container->getParameterBag()
            ->remove('validator.auto_mapping');
    }
    
    /**
     * Builds a regexp to check if a class is auto-mapped.
     */
    private function getRegexp(array $patterns) : ?string {
        if (!$patterns) {
            return null;
        }
        $regexps = [];
        foreach ($patterns as $pattern) {
            // Escape namespace
            $regex = preg_quote(ltrim($pattern, '\\'));
            // Wildcards * and **
            $regex = strtr($regex, [
                '\\*\\*' => '.*?',
                '\\*' => '[^\\\\]*?',
            ]);
            // If this class does not end by a slash, anchor the end
            if (!str_ends_with($regex, '\\')) {
                $regex .= '$';
            }
            $regexps[] = '^' . $regex;
        }
        return \sprintf('{%s}', implode('|', $regexps));
    }

}