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<?php

    namespace Deliverist\Downloader;

    use CzProject\PathHelper;
    use CzProject\Runner\Runner;
    use Nette\Utils\FileSystem;


    class GitDownloader implements IDownloader
    {
        /** @var string */
        private $url;

        /** @var string */
        private $branch;

        /** @var string */
        private $gitExecutable = 'git';


        /**
         * @param  string
         * @param  string
         */
        public function __construct($url, $branch)
        {
            $this->url = $url;
            $this->branch = $branch;
        }


        /**
         * @param  string
         * @return self
         */
        public function setGitExecutable($gitExecutable)
        {
            $this->gitExecutable = $gitExecutable;
            return $this;
        }


        /**
         * @return string
         */
        public function getLabel()
        {
            return $this->url . ' (' . $this->branch . ')';
        }


        /**
         * @param  string
         * @return void
         * @throws GitDownloaderException
         */
        public function download($directory)
        {
            $directory = PathHelper::absolutizePath($directory);
            @mkdir($directory, 0777, TRUE);

            $runner = new Runner($directory);
            $result = $runner->run(array(
                $this->gitExecutable,
                'clone',
                '--depth' => 50,
                '--branch' => $this->branch,
                $this->url,
                $directory,
            ));

            if (!$result->isOk()) {
                throw new GitDownloaderException("Cloning of '{$this->url}' failed.");
            }

            FileSystem::delete($directory . '/.git');
        }
    }


    class GitDownloaderException extends Exception
    {
    }