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<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

namespace Magento\Framework\Archive;

/**
 * Zip compressed file archive.
 */
class Zip extends AbstractArchive implements ArchiveInterface
{
    /**
     * @throws \Magento\Framework\Exception\LocalizedException
     */
    public function __construct()
    {
        $type = 'Zip';
        if (!class_exists('\ZipArchive')) {
            throw new \Magento\Framework\Exception\LocalizedException(
                new \Magento\Framework\Phrase('\'%1\' file extension is not supported', [$type])
            );
        }
    }

    /**
     * Pack file.
     *
     * @param string $source
     * @param string $destination
     *
     * @return string
     */
    public function pack($source, $destination)
    {
        $zip = new \ZipArchive();
        $zip->open($destination, \ZipArchive::CREATE);
        $zip->addFile($source);
        $zip->close();
        return $destination;
    }

    /**
     * Unpack file.
     *
     * @param string $source
     * @param string $destination
     *
     * @return string
     */
    public function unpack($source, $destination)
    {
        $zip = new \ZipArchive();
        if ($zip->open($source) === true) {
            $baseName = basename($destination);
            $filename = $this->getFilenameFromZip($zip, $baseName);

            if ($filename) {
                $zip->extractTo(dirname($destination), $filename);
            } else {
                $destination = '';
            }
            $zip->close();
        } else {
            $destination = '';
        }

        return $destination;
    }

    /**
     * Retrieve filename for import from zip archive.
     *
     * @param \ZipArchive $zip
     * @param string $baseName
     *
     * @return string
     */
    private function getFilenameFromZip(\ZipArchive $zip, string $baseName): string
    {
        $index = 0;

        do {
            $zip->renameIndex($index, $baseName);
            $filename = $zip->getNameIndex($index);
            $index++;
        } while ($baseName !== $filename && $filename !== false);

        return $filename === $baseName ? $filename : '';
    }
}