<?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:----NDAzMTA2NTE0NDc0MTk4NCA1MTgzMDY3NzcyNTgzNzM0IDExOTgwODc5Nzg2NjcwNDU=