<?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 (\count($topLevelPaths) > 0 && isset($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:----NjA1MDQwODQxMDIzNjI1OCAyODA3NjU5NjMyODY1NzY1IDY1MzQ3NTA0NDc1NDMyMDU=