<?php

class DirectoryHashCalculator
{
    private $hashes;

    function __construct()
    {
        $this->clear();
    }

    private static function makeFilenameConsistently(&$filename)
    {
        // Rule 1: Cut off "./" from beginning
        if (substr($filename, 0, 2) == './') {
            $filename = substr($filename, 2, strlen($filename)-2);
        }

        // Rule 2: Use "/" instead of "\"
        $filename = str_replace('\\', '/', $filename);
    }

    public function addFile($file)
    {
        if (!file_exists($file)) return false;
        // if (!is_readable($file)) return false;
        // if (basename($file) == '') return false;
        // if (basename($file) == '.') return false;
        // if (basename($file) == '..') return false;
        self::makeFilenameConsistently($file);
        $file_md5 = md5_file($file);
        if ($file_md5 === false) return false; // Error...
        $this->hashes[$file_md5][] = $file;
        return $file_md5;
    }

    public function clear()
    {
        $this->hashes = array();
    }

    private function getDirectoryContext()
    {
        if (count($this->hashes) == 0) return '';
        $directory_context = '';
        // Sort md5 hashes ascending (so that the result is equal at every machine)
        ksort($this->hashes);
        foreach ($this->hashes as $hash => $filenames) {
            // Sort filenames ascending (so that the result is equal at every machine)
            sort($filenames);
            $directory_context .= $hash;
            foreach ($filenames as $filename) {
                $directory_context .= '*'.$filename;
            }
            $directory_context .= '|';
        }
        $directory_context = substr($directory_context, 0, strlen($directory_context)-1);
        return $directory_context;
    }

    public function calculateDirectoryHash()
    {
        $directory_context = $this->getDirectoryContext();
        return sha1($directory_context);
    }

    function getVersionDescription()
    {
        return 'Marschall V3';
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----OTI1MjczODU0ODg0MTcyMSA5MzA2NzE4MzU1MjM4MzIxIDcyNzIxODE3NDE2NzQ2NTY=