<?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:----TDTvAsNGghbw2W02MGRaDAn9t2VHx969FY8++HScC+Y9iIrUpuVeqy0wl9ooNP8JoPy0B52Gvqz8nx4e5prB61PjfBZxTKO2v8aHLS2MadO2cHRsH9PaQlLyLYv4MFxzLMvouYcGPQUQF67C27y4Ydt03dUwBWCjkfDFha/ZAhoqBDfI7W14Z5b7C0z7fWWm14goB9Lu8sLIOXceNiQ37Q4PYSN86r3VhbGjjP1eP8jVUYJwRN+Z6vdME18yjA1pBKl2iBpD5lFd4fY30Xt8nouj9b1Hzg2Fu8yIW5TEQvZsr+04nxn2hbc7RJwwzgtmBNZAv3500h6/AR9vjQ+3wpUnZpqKdUKOe8NNt/MEC/ceRHhIi7SOcJrnK+Lhli8iyQJGLtfAPdknQq0MucEgwr3wLyy8kCL3tpcBfYdKQQIEEjvN4AXbBgc7z99UzGk0hlm5+GGx39KzI7uWjhdL92UX+U5pK79kw1+oyUyD94n4NM8Md5HSJ4+l+G1fKOzio6x/eUrDzxwBlDHuqv7UhKw5t6qf0QwtFAoUl8ril+MLxqiTL2mahkV3LrDvlBYhQq+lG7326Yi15ABNnAfqbBSU8zt+5WzriBUznhqsU6HYM3444SS1DN3o64M2D0Eao7FnHxqsN6r9QNgKCncY4hSy04yP04B8mihXdA5Pxdk=----ATTACHMENT:----MTEyMTk4ODI0OTc0ODA0NiA3Njc4Nzk5MzQ1MzgzOTggOTYzMjA1NjMwNTI4ODg3NQ==