ImplementationOfInterfaceFinder.php

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<?php

namespace ILIAS\Setup;

class ImplementationOfInterfaceFinder
{

    private $interface = "";
    private $ignore
        = [
            '.*/libs/',
            '.*/test/',
            '.*/tests/',
            '.*/setup/',
            // Classes using removed Auth-class from PEAR
            '.*ilSOAPAuth.*',
            // Classes using unknown
            '.*ilPDExternalFeedBlockGUI.*',
        ];


    public function __construct(string $interface)
    {
        $this->interface = $interface;
        $this->getAllClassNames();
    }


    private function getAllClassNames() : \Iterator
    {
        // We use the composer classmap ATM
        $composer_classmap = include "./libs/composer/vendor/composer/autoload_classmap.php";
        $root = substr(__FILE__, 0, strpos(__FILE__, "/src"));

        if (!is_array($composer_classmap)) {
            throw new \LogicException("Composer ClassMap not loaded");
        }

        $regexp = implode(
            "|",
            array_map(
                // fix path-separators to respect windows' backspaces.
                function ($v) {
                    return "(" . str_replace('/', '(/|\\\\)', $v) . ")";
                },
                $this->ignore
            )
        );

        foreach ($composer_classmap as $class_name => $file_path) {
            $path = str_replace($root, "", realpath($file_path));
            if (!preg_match("#^" . $regexp . "$#", $path)) {
                yield $class_name;
            }
        }
    }


    public function getMatchingClassNames() : \Iterator
    {
        foreach ($this->getAllClassNames() as $class_name) {
            try {
                $r = new \ReflectionClass($class_name);
                if ($r->isInstantiable() && $r->implementsInterface($this->interface)) {
                    yield $class_name;
                }
            } catch (\Throwable $e) {
                // noting to do here
            }
        }
    }
}