<?php

namespace Composer\Util;

/**
 * @author Wissem Riahi <wissemr@gmail.com>
 */
class Tar
{
    public static function getComposerJson(string $pathToArchive): ?string
    {
        $phar = new \PharData($pathToArchive);

        if (!$phar->valid()) {
            return null;
        }

        return self::extractComposerJsonFromFolder($phar);
    }

    /**
     * @throws \RuntimeException
     */
    private static function extractComposerJsonFromFolder(\PharData $phar): string
    {
        if (isset($phar['composer.json'])) {
            return $phar['composer.json']->getContent();
        }

        $topLevelPaths = [];
        foreach ($phar as $folderFile) {
            $name = $folderFile->getBasename();

            if ($folderFile->isDir()) {
                $topLevelPaths[$name] = true;
                if (\count($topLevelPaths) > 1) {
                    throw new \RuntimeException('Archive has more than one top level directories, and no composer.json was found on the top level, so it\'s an invalid archive. Top level paths found were: '.implode(',', array_keys($topLevelPaths)));
                }
            }
        }

        $composerJsonPath = key($topLevelPaths).'/composer.json';
        if ($topLevelPaths && isset($phar[$composerJsonPath])) {
            return $phar[$composerJsonPath]->getContent();
        }

        throw new \RuntimeException('No composer.json found either at the top level or within the topmost directory');
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----ODAyODM2NDI1MjU1NTA0MCAzNjA5MDM5NDE3NDc0MzMwIDg4MzM0MTkyMzU1MzgwNDc=