class ArtifactRepository

class ArtifactRepository extends ArrayRepository implements ConfigurableRepositoryInterface {
    
    /** @var LoaderInterface */
    protected $loader;
    
    /** @var string */
    protected $lookup;
    
    /** @var array{url: string} */
    protected $repoConfig;
    
    /** @var IOInterface */
    private $io;
    
    /**
     * @param array{url: string} $repoConfig
     */
    public function __construct(array $repoConfig, IOInterface $io) {
        parent::__construct();
        if (!extension_loaded('zip')) {
            throw new \RuntimeException('The artifact repository requires PHP\'s zip extension');
        }
        $this->loader = new ArrayLoader();
        $this->lookup = Platform::expandPath($repoConfig['url']);
        $this->io = $io;
        $this->repoConfig = $repoConfig;
    }
    public function getRepoName() {
        return 'artifact repo (' . $this->lookup . ')';
    }
    public function getRepoConfig() {
        return $this->repoConfig;
    }
    protected function initialize() {
        parent::initialize();
        $this->scanDirectory($this->lookup);
    }
    private function scanDirectory(string $path) : void {
        $io = $this->io;
        $directory = new \RecursiveDirectoryIterator($path, \RecursiveDirectoryIterator::FOLLOW_SYMLINKS);
        $iterator = new \RecursiveIteratorIterator($directory);
        $regex = new \RegexIterator($iterator, '/^.+\\.(zip|tar|gz|tgz)$/i');
        foreach ($regex as $file) {
            
            /* @var $file \SplFileInfo */
            if (!$file->isFile()) {
                continue;
            }
            $package = $this->getComposerInformation($file);
            if (!$package) {
                $io->writeError("File <comment>{$file->getBasename()}</comment> doesn't seem to hold a package", true, IOInterface::VERBOSE);
                continue;
            }
            $template = 'Found package <info>%s</info> (<comment>%s</comment>) in file <info>%s</info>';
            $io->writeError(sprintf($template, $package->getName(), $package->getPrettyVersion(), $file->getBasename()), true, IOInterface::VERBOSE);
            $this->addPackage($package);
        }
    }
    
    /**
     * @return ?BasePackage
     */
    private function getComposerInformation(\SplFileInfo $file) : ?BasePackage {
        $json = null;
        $fileType = null;
        $fileExtension = pathinfo($file->getPathname(), PATHINFO_EXTENSION);
        if (in_array($fileExtension, [
            'gz',
            'tar',
            'tgz',
        ], true)) {
            $fileType = 'tar';
        }
        elseif ($fileExtension === 'zip') {
            $fileType = 'zip';
        }
        else {
            throw new \RuntimeException('Files with "' . $fileExtension . '" extensions aren\'t supported. Only ZIP and TAR/TAR.GZ/TGZ archives are supported.');
        }
        try {
            if ($fileType === 'tar') {
                $json = Tar::getComposerJson($file->getPathname());
            }
            else {
                $json = Zip::getComposerJson($file->getPathname());
            }
        } catch (\Exception $exception) {
            $this->io
                ->write('Failed loading package ' . $file->getPathname() . ': ' . $exception->getMessage(), false, IOInterface::VERBOSE);
        }
        if (null === $json) {
            return null;
        }
        $package = JsonFile::parseJson($json, $file->getPathname() . '#composer.json');
        $package['dist'] = [
            'type' => $fileType,
            'url' => strtr($file->getPathname(), '\\', '/'),
            'shasum' => hash_file('sha1', $file->getRealPath()),
        ];
        try {
            $package = $this->loader
                ->load($package);
        } catch (\UnexpectedValueException $e) {
            throw new \UnexpectedValueException('Failed loading package in ' . $file . ': ' . $e->getMessage(), 0, $e);
        }
        return $package;
    }

}