<?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:----MjQ4MTkzNzA1MzI1NzM3OSA0ODAzMDMwNjEyMDg4NzA0IDE2MDgzNzgxOTU2NTQwNTQ=