<?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:----NjEyMTczOTY4MjMyNzY2NSA2OTk1OTAwNDAyNTc1NDM3IDkwNTcwNTEyNzM3Njk4NjU=