<?php
/*************************
  Coppermine Photo Gallery
  ************************
  Copyright (c) 2003-2009 Coppermine Dev Team
  v1.1 originally written by Gregory DEMAR

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License version 3
  as published by the Free Software Foundation.
  
  ********************************************
  Coppermine version: 1.4.20
  $HeadURL: https://coppermine.svn.sourceforge.net/svnroot/coppermine/trunk/cpg1.4.x/include/archive.php $
  $Revision: 5705 $
  $Author: gaugau $
  $Date: 2009-01-28 10:52:43 +0100 (Mi, 28 Jan 2009) $
**********************************************/

/*--------------------------------------------------
 | TAR/GZIP/BZIP2/ZIP ARCHIVE CLASSES 2.1
 | By Devin Doucette
 | Copyright (c) 2005 Devin Doucette
 | Email: darksnoopy@shaw.ca
 +--------------------------------------------------
 | Email bugs/suggestions to darksnoopy@shaw.ca
 +--------------------------------------------------
 | This script has been created and released under
 | the GNU GPL and is free to use and redistribute
 | only if this copyright statement is not removed
 +--------------------------------------------------*/

class archive
{
  function archive($name)
  {
    $this->options = array (
      'basedir' => ".",
      'name' => $name,
      'prepend' => "",
      'inmemory' => 0,
      'overwrite' => 0,
      'recurse' => 1,
      'storepaths' => 1,
      'followlinks' => 0,
      'level' => 3,
      'method' => 1,
      'sfx' => "",
      'type' => "",
      'comment' => ""
    );
    $this->files = array ();
    $this->exclude = array ();
    $this->storeonly = array ();
    $this->error = array ();
  }

  function set_options($options)
  {
    foreach ($options as $key => $value)
      $this->options[$key] = $value;
    if (!empty ($this->options['basedir']))
    {
      $this->options['basedir'] = str_replace("\\", "/", $this->options['basedir']);
      $this->options['basedir'] = preg_replace("/\/+/", "/", $this->options['basedir']);
      $this->options['basedir'] = preg_replace("/\/$/", "", $this->options['basedir']);
    }
    if (!empty ($this->options['name']))
    {
      $this->options['name'] = str_replace("\\", "/", $this->options['name']);
      $this->options['name'] = preg_replace("/\/+/", "/", $this->options['name']);
    }
    if (!empty ($this->options['prepend']))
    {
      $this->options['prepend'] = str_replace("\\", "/", $this->options['prepend']);
      $this->options['prepend'] = preg_replace("/^(\.*\/+)+/", "", $this->options['prepend']);
      $this->options['prepend'] = preg_replace("/\/+/", "/", $this->options['prepend']);
      $this->options['prepend'] = preg_replace("/\/$/", "", $this->options['prepend']) . "/";
    }
  }

  function create_archive()
  {
    $this->make_list();

    if ($this->options['inmemory'] == 0)
    {
      $pwd = getcwd();
      chdir($this->options['basedir']);
      if ($this->options['overwrite'] == 0 && file_exists($this->options['name'] . ($this->options['type'] == "gzip" || $this->options['type'] == "bzip" ? ".tmp" : "")))
      {
        $this->error[] = "File {$this->options['name']} already exists.";
        chdir($pwd);
        return 0;
      }
      else if ($this->archive = @fopen($this->options['name'] . ($this->options['type'] == "gzip" || $this->options['type'] == "bzip" ? ".tmp" : ""), "wb+"))
        chdir($pwd);
      else
      {
        $this->error[] = "Could not open {$this->options['name']} for writing.";
        chdir($pwd);
        return 0;
      }
    }
    else
      $this->archive = "";

    switch ($this->options['type'])
    {
    case "zip":
      if (!$this->create_zip())
      {
        $this->error[] = "Could not create zip file.";
        return 0;
      }
      break;
    case "bzip":
      if (!$this->create_tar())
      {
        $this->error[] = "Could not create tar file.";
        return 0;
      }
      if (!$this->create_bzip())
      {
        $this->error[] = "Could not create bzip2 file.";
        return 0;
      }
      break;
    case "gzip":
      if (!$this->create_tar())
      {
        $this->error[] = "Could not create tar file.";
        return 0;
      }
      if (!$this->create_gzip())
      {
        $this->error[] = "Could not create gzip file.";
        return 0;
      }
      break;
    case "tar":
      if (!$this->create_tar())
      {
        $this->error[] = "Could not create tar file.";
        return 0;
      }
    }

    if ($this->options['inmemory'] == 0)
    {
      fclose($this->archive);
      if ($this->options['type'] == "gzip" || $this->options['type'] == "bzip")
        unlink($this->options['basedir'] . "/" . $this->options['name'] . ".tmp");
    }
  }

  function add_data($data)
  {
    if ($this->options['inmemory'] == 0)
      fwrite($this->archive, $data);
    else
      $this->archive .= $data;
  }

  function make_list()
  {
    if (!empty ($this->exclude))
      foreach ($this->files as $key => $value)
        foreach ($this->exclude as $current)
          if ($value['name'] == $current['name'])
            unset ($this->files[$key]);
    if (!empty ($this->storeonly))
      foreach ($this->files as $key => $value)
        foreach ($this->storeonly as $current)
          if ($value['name'] == $current['name'])
            $this->files[$key]['method'] = 0;
    unset ($this->exclude, $this->storeonly);
  }

  function add_files($list)
  {
    $temp = $this->list_files($list);
    foreach ($temp as $current)
      $this->files[] = $current;
  }

  function exclude_files($list)
  {
    $temp = $this->list_files($list);
    foreach ($temp as $current)
      $this->exclude[] = $current;
  }

  function store_files($list)
  {
    $temp = $this->list_files($list);
    foreach ($temp as $current)
      $this->storeonly[] = $current;
  }

  function list_files($list)
  {
    if (!is_array ($list))
    {
      $temp = $list;
      $list = array ($temp);
      unset ($temp);
    }

    $files = array ();

    $pwd = getcwd();
    chdir($this->options['basedir']);

    foreach ($list as $current)
    {
      $current = str_replace("\\", "/", $current);
      $current = preg_replace("/\/+/", "/", $current);
      $current = preg_replace("/\/$/", "", $current);
      if (strstr($current, "*"))
      {
        $regex = preg_replace("/([\\\^\$\.\[\]\|\(\)\?\+\{\}\/])/", "\\\\\\1", $current);
        $regex = str_replace("*", ".*", $regex);
        $dir = strstr($current, "/") ? substr($current, 0, strrpos($current, "/")) : ".";
        $temp = $this->parse_dir($dir);
        foreach ($temp as $current2)
          if (preg_match("/^{$regex}$/i", $current2['name']))
            $files[] = $current2;
        unset ($regex, $dir, $temp, $current);
      }
      else if (@is_dir($current))
      {
        $temp = $this->parse_dir($current);
        foreach ($temp as $file)
          $files[] = $file;
        unset ($temp, $file);
      }
      else if (@file_exists($current))
        $files[] = array ('name' => $current, 'name2' => $this->options['prepend'] .
          preg_replace("/(\.+\/+)+/", "", ($this->options['storepaths'] == 0 && strstr($current, "/")) ?
          substr($current, strrpos($current, "/") + 1) : $current),
          'type' => @is_link($current) && $this->options['followlinks'] == 0 ? 2 : 0,
          'ext' => substr($current, strrpos($current, ".")), 'stat' => stat($current));
    }

    chdir($pwd);

    unset ($current, $pwd);

    usort($files, array ("archive", "sort_files"));

    return $files;
  }

  function parse_dir($dirname)
  {
    if ($this->options['storepaths'] == 1 && !preg_match("/^(\.+\/*)+$/", $dirname))
      $files = array (array ('name' => $dirname, 'name2' => $this->options['prepend'] .
        preg_replace("/(\.+\/+)+/", "", ($this->options['storepaths'] == 0 && strstr($dirname, "/")) ?
        substr($dirname, strrpos($dirname, "/") + 1) : $dirname), 'type' => 5, 'stat' => stat($dirname)));
    else
      $files = array ();
    $dir = @opendir($dirname);

    while ($file = @readdir($dir))
    {
      $fullname = $dirname . "/" . $file;
      if ($file == "." || $file == "..")
        continue;
      else if (@is_dir($fullname))
      {
        if (empty ($this->options['recurse']))
          continue;
        $temp = $this->parse_dir($fullname);
        foreach ($temp as $file2)
          $files[] = $file2;
      }
      else if (@file_exists($fullname))
        $files[] = array ('name' => $fullname, 'name2' => $this->options['prepend'] .
          preg_replace("/(\.+\/+)+/", "", ($this->options['storepaths'] == 0 && strstr($fullname, "/")) ?
          substr($fullname, strrpos($fullname, "/") + 1) : $fullname),
          'type' => @is_link($fullname) && $this->options['followlinks'] == 0 ? 2 : 0,
          'ext' => substr($file, strrpos($file, ".")), 'stat' => stat($fullname));
    }

    @closedir($dir);

    return $files;
  }

  function sort_files($a, $b)
  {
    if ($a['type'] != $b['type'])
      if ($a['type'] == 5 || $b['type'] == 2)
        return -1;
      else if ($a['type'] == 2 || $b['type'] == 5)
        return 1;
    else if ($a['type'] == 5)
      return strcmp(strtolower($a['name']), strtolower($b['name']));
    else if ($a['ext'] != $b['ext'])
      return strcmp($a['ext'], $b['ext']);
    else if ($a['stat'][7] != $b['stat'][7])
      return $a['stat'][7] > $b['stat'][7] ? -1 : 1;
    else
      return strcmp(strtolower($a['name']), strtolower($b['name']));
    return 0;
  }

  function download_file()
  {
    if ($this->options['inmemory'] == 0)
    {
      $this->error[] = "Can only use download_file() if archive is in memory. Redirect to file otherwise, it is faster.";
      return;
    }
    switch ($this->options['type'])
    {
    case "zip":
      header("Content-Type: application/zip");
      break;
    case "bzip":
      header("Content-Type: application/x-bzip2");
      break;
    case "gzip":
      header("Content-Type: application/x-gzip");
      break;
    case "tar":
      header("Content-Type: application/x-tar");
    }
    $header = "Content-Disposition: attachment; filename=\"";
    $header .= strstr($this->options['name'], "/") ? substr($this->options['name'], strrpos($this->options['name'], "/") + 1) : $this->options['name'];
    $header .= "\"";
    header($header);
    header("Content-Length: " . strlen($this->archive));
    header("Content-Transfer-Encoding: binary");
    header("Cache-Control: no-cache, must-revalidate, max-age=60");
    header("Expires: Sat, 01 Jan 2000 12:00:00 GMT");
    print($this->archive);
  }
}

class tar_file extends archive
{
  function tar_file($name)
  {
    $this->archive($name);
    $this->options['type'] = "tar";
  }

  function create_tar()
  {
    $pwd = getcwd();
    chdir($this->options['basedir']);

    foreach ($this->files as $current)
    {
      if ($current['name'] == $this->options['name'])
        continue;
      if (strlen($current['name2']) > 99)
      {
        $path = substr($current['name2'], 0, strpos($current['name2'], "/", strlen($current['name2']) - 100) + 1);
        $current['name2'] = substr($current['name2'], strlen($path));
        if (strlen($path) > 154 || strlen($current['name2']) > 99)
        {
          $this->error[] = "Could not add {$path}{$current['name2']} to archive because the filename is too long.";
          continue;
        }
      }
      $block = pack("a100a8a8a8a12a12a8a1a100a6a2a32a32a8a8a155a12", $current['name2'], sprintf("%07o",
        $current['stat'][2]), sprintf("%07o", $current['stat'][4]), sprintf("%07o", $current['stat'][5]),
        sprintf("%011o", $current['type'] == 2 ? 0 : $current['stat'][7]), sprintf("%011o", $current['stat'][9]),
        "        ", $current['type'], $current['type'] == 2 ? @readlink($current['name']) : "", "ustar ", " ",
        "Unknown", "Unknown", "", "", !empty ($path) ? $path : "", "");

      $checksum = 0;
      for ($i = 0; $i < 512; $i++)
        $checksum += ord(substr($block, $i, 1));
      $checksum = pack("a8", sprintf("%07o", $checksum));
      $block = substr_replace($block, $checksum, 148, 8);

      if ($current['type'] == 2 || $current['stat'][7] == 0)
        $this->add_data($block);
      else if ($fp = @fopen($current['name'], "rb"))
      {
        $this->add_data($block);
        while ($temp = fread($fp, 1048576))
          $this->add_data($temp);
        if ($current['stat'][7] % 512 > 0)
        {
          $temp = "";
          for ($i = 0; $i < 512 - $current['stat'][7] % 512; $i++)
            $temp .= "\0";
          $this->add_data($temp);
        }
        fclose($fp);
      }
      else
        $this->error[] = "Could not open file {$current['name']} for reading. It was not added.";
    }

    $this->add_data(pack("a1024", ""));

    chdir($pwd);

    return 1;
  }

  function extract_files()
  {
    $pwd = getcwd();
    chdir($this->options['basedir']);

    if ($fp = $this->open_archive())
    {
      if ($this->options['inmemory'] == 1)
        $this->files = array ();

      while ($block = fread($fp, 512))
      {
        $temp = unpack("a100name/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/a1type/a100symlink/a6magic/a2temp/a32temp/a32temp/a8temp/a8temp/a155prefix/a12temp", $block);
        $file = array (
          'name' => $temp['prefix'] . $temp['name'],
          'stat' => array (
            2 => $temp['mode'],
            4 => octdec($temp['uid']),
            5 => octdec($temp['gid']),
            7 => octdec($temp['size']),
            9 => octdec($temp['mtime']),
          ),
          'checksum' => octdec($temp['checksum']),
          'type' => $temp['type'],
          'magic' => $temp['magic'],
        );
        if ($file['checksum'] == 0x00000000)
          break;
        else if (substr($file['magic'], 0, 5) != "ustar")
        {
          $this->error[] = "This script does not support extracting this type of tar file.";
          break;
        }
        $block = substr_replace($block, "        ", 148, 8);
        $checksum = 0;
        for ($i = 0; $i < 512; $i++)
          $checksum += ord(substr($block, $i, 1));
        if ($file['checksum'] != $checksum)
          $this->error[] = "Could not extract from {$this->options['name']}, it is corrupt.";

        if ($this->options['inmemory'] == 1)
        {
          $file['data'] = fread($fp, $file['stat'][7]);
          fread($fp, (512 - $file['stat'][7] % 512) == 512 ? 0 : (512 - $file['stat'][7] % 512));
          unset ($file['checksum'], $file['magic']);
          $this->files[] = $file;
        }
        else if ($file['type'] == 5)
        {
          if (!is_dir($file['name']))
            mkdir($file['name'], $file['stat'][2]);
        }
        else if ($this->options['overwrite'] == 0 && file_exists($file['name']))
        {
          $this->error[] = "{$file['name']} already exists.";
          continue;
        }
        else if ($file['type'] == 2)
        {
          symlink($temp['symlink'], $file['name']);
          chmod($file['name'], $file['stat'][2]);
        }
        else if ($new = @fopen($file['name'], "wb"))
        {
          fwrite($new, fread($fp, $file['stat'][7]));
          fread($fp, (512 - $file['stat'][7] % 512) == 512 ? 0 : (512 - $file['stat'][7] % 512));
          fclose($new);
          chmod($file['name'], $file['stat'][2]);
        }
        else
        {
          $this->error[] = "Could not open {$file['name']} for writing.";
          continue;
        }
        chown($file['name'], $file['stat'][4]);
        chgrp($file['name'], $file['stat'][5]);
        touch($file['name'], $file['stat'][9]);
        unset ($file);
      }
    }
    else
      $this->error[] = "Could not open file {$this->options['name']}";

    chdir($pwd);
  }

  function open_archive()
  {
    return @fopen($this->options['name'], "rb");
  }
}

class gzip_file extends tar_file
{
  function gzip_file($name)
  {
    $this->tar_file($name);
    $this->options['type'] = "gzip";
  }

  function create_gzip()
  {
    if ($this->options['inmemory'] == 0)
    {
      $pwd = getcwd();
      chdir($this->options['basedir']);
      if ($fp = gzopen($this->options['name'], "wb{$this->options['level']}"))
      {
        fseek($this->archive, 0);
        while ($temp = fread($this->archive, 1048576))
          gzwrite($fp, $temp);
        gzclose($fp);
        chdir($pwd);
      }
      else
      {
        $this->error[] = "Could not open {$this->options['name']} for writing.";
        chdir($pwd);
        return 0;
      }
    }
    else
      $this->archive = gzencode($this->archive, $this->options['level']);

    return 1;
  }

  function open_archive()
  {
    return @gzopen($this->options['name'], "rb");
  }
}

class bzip_file extends tar_file
{
  function bzip_file($name)
  {
    $this->tar_file($name);
    $this->options['type'] = "bzip";
  }

  function create_bzip()
  {
    if ($this->options['inmemory'] == 0)
    {
      $pwd = getcwd();
      chdir($this->options['basedir']);
      if ($fp = bzopen($this->options['name'], "wb"))
      {
        fseek($this->archive, 0);
        while ($temp = fread($this->archive, 1048576))
          bzwrite($fp, $temp);
        bzclose($fp);
        chdir($pwd);
      }
      else
      {
        $this->error[] = "Could not open {$this->options['name']} for writing.";
        chdir($pwd);
        return 0;
      }
    }
    else
      $this->archive = bzcompress($this->archive, $this->options['level']);

    return 1;
  }

  function open_archive()
  {
    return @bzopen($this->options['name'], "rb");
  }
}

class zip_file extends archive
{
  function zip_file($name)
  {
    $this->archive($name);
    $this->options['type'] = "zip";
  }

  function create_zip()
  {
    $files = 0;
    $offset = 0;
    $central = "";

    if (!empty ($this->options['sfx']))
      if ($fp = @fopen($this->options['sfx'], "rb"))
      {
        $temp = fread($fp, filesize($this->options['sfx']));
        fclose($fp);
        $this->add_data($temp);
        $offset += strlen($temp);
        unset ($temp);
      }
      else
        $this->error[] = "Could not open sfx module from {$this->options['sfx']}.";

    $pwd = getcwd();
    chdir($this->options['basedir']);

    foreach ($this->files as $current)
    {
      if ($current['name'] == $this->options['name'])
        continue;

      $timedate = explode(" ", date("Y n j G i s", $current['stat'][9]));
      $timedate = ($timedate[0] - 1980 << 25) | ($timedate[1] << 21) | ($timedate[2] << 16) |
        ($timedate[3] << 11) | ($timedate[4] << 5) | ($timedate[5]);

      $block = pack("VvvvV", 0x04034b50, 0x000A, 0x0000, (isset($current['method']) || $this->options['method'] == 0) ? 0x0000 : 0x0008, $timedate);

      if ($current['stat'][7] == 0 && $current['type'] == 5)
      {
        $block .= pack("VVVvv", 0x00000000, 0x00000000, 0x00000000, strlen($current['name2']) + 1, 0x0000);
        $block .= $current['name2'] . "/";
        $this->add_data($block);
        $central .= pack("VvvvvVVVVvvvvvVV", 0x02014b50, 0x0014, $this->options['method'] == 0 ? 0x0000 : 0x000A, 0x0000,
          (isset($current['method']) || $this->options['method'] == 0) ? 0x0000 : 0x0008, $timedate,
          0x00000000, 0x00000000, 0x00000000, strlen($current['name2']) + 1, 0x0000, 0x0000, 0x0000, 0x0000, $current['type'] == 5 ? 0x00000010 : 0x00000000, $offset);
        $central .= $current['name2'] . "/";
        $files++;
        $offset += (31 + strlen($current['name2']));
      }
      else if ($current['stat'][7] == 0)
      {
        $block .= pack("VVVvv", 0x00000000, 0x00000000, 0x00000000, strlen($current['name2']), 0x0000);
        $block .= $current['name2'];
        $this->add_data($block);
        $central .= pack("VvvvvVVVVvvvvvVV", 0x02014b50, 0x0014, $this->options['method'] == 0 ? 0x0000 : 0x000A, 0x0000,
          (isset($current['method']) || $this->options['method'] == 0) ? 0x0000 : 0x0008, $timedate,
          0x00000000, 0x00000000, 0x00000000, strlen($current['name2']), 0x0000, 0x0000, 0x0000, 0x0000, $current['type'] == 5 ? 0x00000010 : 0x00000000, $offset);
        $central .= $current['name2'];
        $files++;
        $offset += (30 + strlen($current['name2']));
      }
      else if ($fp = @fopen($current['name'], "rb"))
      {
        $temp = fread($fp, $current['stat'][7]);
        fclose($fp);
        $crc32 = crc32($temp);
        if (!isset($current['method']) && $this->options['method'] == 1)
        {
          $temp = gzcompress($temp, $this->options['level']);
          $size = strlen($temp) - 6;
          $temp = substr($temp, 2, $size);
        }
        else
          $size = strlen($temp);
        $block .= pack("VVVvv", $crc32, $size, $current['stat'][7], strlen($current['name2']), 0x0000);
        $block .= $current['name2'];
        $this->add_data($block);
        $this->add_data($temp);
        unset ($temp);
        $central .= pack("VvvvvVVVVvvvvvVV", 0x02014b50, 0x0014, $this->options['method'] == 0 ? 0x0000 : 0x000A, 0x0000,
          (isset($current['method']) || $this->options['method'] == 0) ? 0x0000 : 0x0008, $timedate,
          $crc32, $size, $current['stat'][7], strlen($current['name2']), 0x0000, 0x0000, 0x0000, 0x0000, 0x00000000, $offset);
        $central .= $current['name2'];
        $files++;
        $offset += (30 + strlen($current['name2']) + $size);
      }
      else
        $this->error[] = "Could not open file {$current['name']} for reading. It was not added.";
    }

    $this->add_data($central);

    $this->add_data(pack("VvvvvVVv", 0x06054b50, 0x0000, 0x0000, $files, $files, strlen($central), $offset,
      !empty ($this->options['comment']) ? strlen($this->options['comment']) : 0x0000));

    if (!empty ($this->options['comment']))
      $this->add_data($this->options['comment']);

    chdir($pwd);

    return 1;
  }
} ?>