Dokuwiki module for Elgg 1.7

1 files changed, 475 insertions, 0 deletions

diff --git a/lib/dokuwiki/inc/ZipLib.class.php b/lib/dokuwiki/inc/ZipLib.class.php
new file mode 100644
index 000000000..836e9d9e6
--- /dev/null
+++ b/lib/dokuwiki/inc/ZipLib.class.php
@@ -0,0 +1,475 @@
+<?php
+
+/**
+ * @author     bouchon
+ * @link       http://dev.maxg.info
+ * @link       http://forum.maxg.info
+ *
+ *  Modified for Dokuwiki
+ *  @author    Christopher Smith <chris@jalakai.co.uk>
+ */
+class ZipLib
+{
+
+ var $datasec, $ctrl_dir = array();
+ var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
+ var $old_offset = 0; var $dirs = Array(".");
+
+ function get_List($zip_name)
+ {
+   $zip = @fopen($zip_name, 'rb');
+   if(!$zip) return(0);
+   $centd = $this->ReadCentralDir($zip,$zip_name);
+
+    @rewind($zip);
+    @fseek($zip, $centd['offset']);
+
+   for ($i=0; $i<$centd['entries']; $i++)
+   {
+    $header = $this->ReadCentralFileHeaders($zip);
+    $header['index'] = $i;$info['filename'] = $header['filename'];
+    $info['stored_filename'] = $header['stored_filename'];
+    $info['size'] = $header['size'];$info['compressed_size']=$header['compressed_size'];
+    $info['crc'] = strtoupper(dechex( $header['crc'] ));
+    $info['mtime'] = $header['mtime']; $info['comment'] = $header['comment'];
+    $info['folder'] = ($header['external']==0x41FF0010||$header['external']==16)?1:0;
+    $info['index'] = $header['index'];$info['status'] = $header['status'];
+    $ret[]=$info; unset($header);
+   }
+  return $ret;
+ }
+
+ function Add($files,$compact)
+ {
+  if(!is_array($files[0])) $files=Array($files);
+
+  for($i=0;$files[$i];$i++){
+    $fn = $files[$i];
+    if(!in_Array(dirname($fn[0]),$this->dirs))
+     $this->add_Dir(dirname($fn[0]));
+    if(basename($fn[0]))
+     $ret[basename($fn[0])]=$this->add_File($fn[1],$fn[0],$compact);
+  }
+  return $ret;
+ }
+
+ /**
+  * Zips recursively the $folder directory, from the $basedir directory
+  */
+ function Compress($folder, $basedir=null, $parent=null)
+ {
+  $full_path = $basedir."/".$parent.$folder;
+  $zip_path = $parent.$folder;
+  if ($zip_path) {
+   $zip_path .= "/";
+   $this->add_dir($zip_path);
+  }
+  $dir = new DirectoryIterator($full_path);
+  foreach($dir as $file) {
+   if(!$file->isDot()) {
+    $filename = $file->getFilename();
+    if($file->isDir()) {
+     $this->Compress($filename, $basedir, $zip_path);
+    } else {
+     $content = join('', file($full_path.'/'.$filename));
+     $this->add_File($content, $zip_path.$filename);
+    }
+   }
+  }
+ }
+
+ /**
+  * Returns the Zip file
+  */
+ function get_file()
+ {
+   $data = implode('', $this -> datasec);
+   $ctrldir = implode('', $this -> ctrl_dir);
+
+   return $data . $ctrldir . $this -> eof_ctrl_dir .
+    pack('v', sizeof($this -> ctrl_dir)).pack('v', sizeof($this -> ctrl_dir)).
+    pack('V', strlen($ctrldir)) . pack('V', strlen($data)) . "\x00\x00";
+ }
+
+ function add_dir($name)
+ {
+   $name = str_replace("\\", "/", $name);
+   $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
+
+   $fr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
+   $fr .= pack("v", 0 ).$name.pack("V", 0).pack("V", 0).pack("V", 0);
+   $this -> datasec[] = $fr;
+
+   $new_offset = strlen(implode("", $this->datasec));
+
+   $cdrec = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
+   $cdrec .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
+   $cdrec .= pack("v", 0 ).pack("v", 0 ).pack("v", 0 ).pack("v", 0 );
+   $ext = "\xff\xff\xff\xff";
+   $cdrec .= pack("V", 16 ).pack("V", $this -> old_offset ).$name;
+
+   $this -> ctrl_dir[] = $cdrec;
+   $this -> old_offset = $new_offset;
+   $this -> dirs[] = $name;
+ }
+
+ /**
+  * Add a file named $name from a string $data
+  */
+ function add_File($data, $name, $compact = 1)
+ {
+   $name     = str_replace('\\', '/', $name);
+   $dtime    = dechex($this->DosTime());
+
+   $hexdtime = '\x' . $dtime[6] . $dtime[7].'\x'.$dtime[4] . $dtime[5]
+     . '\x' . $dtime[2] . $dtime[3].'\x'.$dtime[0].$dtime[1];
+   eval('$hexdtime = "' . $hexdtime . '";');
+
+   if($compact)
+   $fr = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00".$hexdtime;
+   else $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00".$hexdtime;
+   $unc_len = strlen($data); $crc = crc32($data);
+
+   if($compact){
+     $zdata = gzcompress($data); $c_len = strlen($zdata);
+     $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2);
+   }else{
+     $zdata = $data;
+   }
+   $c_len=strlen($zdata);
+   $fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
+   $fr .= pack('v', strlen($name)).pack('v', 0).$name.$zdata;
+
+   $fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
+
+   $this -> datasec[] = $fr;
+   $new_offset        = strlen(implode('', $this->datasec));
+   if($compact)
+        $cdrec = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00";
+   else $cdrec = "\x50\x4b\x01\x02\x14\x00\x0a\x00\x00\x00\x00\x00";
+   $cdrec .= $hexdtime.pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
+   $cdrec .= pack('v', strlen($name) ).pack('v', 0 ).pack('v', 0 );
+   $cdrec .= pack('v', 0 ).pack('v', 0 ).pack('V', 32 );
+   $cdrec .= pack('V', $this -> old_offset );
+
+   $this -> old_offset = $new_offset;
+   $cdrec .= $name;
+   $this -> ctrl_dir[] = $cdrec;
+   return true;
+ }
+
+ function DosTime() {
+   $timearray = getdate();
+   if ($timearray['year'] < 1980) {
+     $timearray['year'] = 1980; $timearray['mon'] = 1;
+     $timearray['mday'] = 1; $timearray['hours'] = 0;
+     $timearray['minutes'] = 0; $timearray['seconds'] = 0;
+   }
+   return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) |     ($timearray['mday'] << 16) | ($timearray['hours'] << 11) |
+    ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
+ }
+
+ /**
+  * Extract a zip file $zn to the $to directory
+  */
+ function Extract ( $zn, $to, $index = Array(-1) )
+ {
+   if(!@is_dir($to)) $this->_mkdir($to);
+   $ok = 0; $zip = @fopen($zn,'rb');
+   if(!$zip) return(-1);
+   $cdir = $this->ReadCentralDir($zip,$zn);
+   $pos_entry = $cdir['offset'];
+
+   if(!is_array($index)){ $index = array($index);  }
+   for($i=0; isset($index[$i]);$i++){
+     if(intval($index[$i])!=$index[$i]||$index[$i]>$cdir['entries'])
+      return(-1);
+   }
+
+   for ($i=0; $i<$cdir['entries']; $i++)
+   {
+     @fseek($zip, $pos_entry);
+     $header = $this->ReadCentralFileHeaders($zip);
+     $header['index'] = $i; $pos_entry = ftell($zip);
+     @rewind($zip); fseek($zip, $header['offset']);
+     if(in_array("-1",$index)||in_array($i,$index))
+      $stat[$header['filename']]=$this->ExtractFile($header, $to, $zip);
+
+   }
+   fclose($zip);
+   return $stat;
+ }
+
+  function ReadFileHeader($zip, $header)
+  {
+    $binary_data = fread($zip, 30);
+    $data = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);
+
+    $header['filename'] = fread($zip, $data['filename_len']);
+    if ($data['extra_len'] != 0) {
+      $header['extra'] = fread($zip, $data['extra_len']);
+    } else { $header['extra'] = ''; }
+
+    $header['compression'] = $data['compression'];
+    foreach (array('size','compressed_size','crc') as $hd) { // On ODT files, these headers are 0. Keep the previous value.
+        if ($data[$hd] != 0) $header[$hd] = $data[$hd];
+    }
+    $header['flag'] = $data['flag'];
+    $header['mdate'] = $data['mdate'];$header['mtime'] = $data['mtime'];
+
+    if ($header['mdate'] && $header['mtime']){
+     $hour=($header['mtime']&0xF800)>>11;$minute=($header['mtime']&0x07E0)>>5;
+     $seconde=($header['mtime']&0x001F)*2;$year=(($header['mdate']&0xFE00)>>9)+1980;
+     $month=($header['mdate']&0x01E0)>>5;$day=$header['mdate']&0x001F;
+     $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
+    }else{$header['mtime'] = time();}
+
+    $header['stored_filename'] = $header['filename'];
+    $header['status'] = "ok";
+    return $header;
+  }
+
+ function ReadCentralFileHeaders($zip){
+    $binary_data = fread($zip, 46);
+    $header = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);
+
+    if ($header['filename_len'] != 0)
+      $header['filename'] = fread($zip,$header['filename_len']);
+    else $header['filename'] = '';
+
+    if ($header['extra_len'] != 0)
+      $header['extra'] = fread($zip, $header['extra_len']);
+    else $header['extra'] = '';
+
+    if ($header['comment_len'] != 0)
+      $header['comment'] = fread($zip, $header['comment_len']);
+    else $header['comment'] = '';
+
+    if ($header['mdate'] && $header['mtime'])
+    {
+      $hour = ($header['mtime'] & 0xF800) >> 11;
+      $minute = ($header['mtime'] & 0x07E0) >> 5;
+      $seconde = ($header['mtime'] & 0x001F)*2;
+      $year = (($header['mdate'] & 0xFE00) >> 9) + 1980;
+      $month = ($header['mdate'] & 0x01E0) >> 5;
+      $day = $header['mdate'] & 0x001F;
+      $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
+    } else {
+      $header['mtime'] = time();
+    }
+    $header['stored_filename'] = $header['filename'];
+    $header['status'] = 'ok';
+    if (substr($header['filename'], -1) == '/')
+      $header['external'] = 0x41FF0010;
+    return $header;
+ }
+
+ function ReadCentralDir($zip,$zip_name)
+ {
+  $size = filesize($zip_name);
+  if ($size < 277) $maximum_size = $size;
+  else $maximum_size=277;
+
+  @fseek($zip, $size-$maximum_size);
+  $pos = ftell($zip); $bytes = 0x00000000;
+
+  while ($pos < $size)
+  {
+    $byte = @fread($zip, 1);
+    $bytes=(($bytes << 8) & 0xFFFFFFFF) | Ord($byte);
+    if ($bytes == 0x504b0506){ $pos++; break; } $pos++;
+  }
+
+ $data=unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',
+        fread($zip, 18));
+
+  if ($data['comment_size'] != 0)
+    $centd['comment'] = fread($zip, $data['comment_size']);
+    else $centd['comment'] = ''; $centd['entries'] = $data['entries'];
+  $centd['disk_entries'] = $data['disk_entries'];
+  $centd['offset'] = $data['offset'];$centd['disk_start'] = $data['disk_start'];
+  $centd['size'] = $data['size'];  $centd['disk'] = $data['disk'];
+  return $centd;
+ }
+
+ function ExtractFile($header,$to,$zip)
+ {
+   $header = $this->readfileheader($zip, $header);
+
+   if(substr($to,-1)!="/") $to.="/";
+   if(substr($header['filename'],-1)=="/")
+   {
+//    @mkdir($to.$header['filename']);   --CS
+    $this->_mkdir($to.$header['filename']);  //-- CS
+    return +2;
+   }
+
+//   $pth = explode("/",dirname($header['filename']));
+//   for($i=0,$tmp="";isset($pth[$i]);$i++){
+//     if(!$pth[$i]) continue;
+//     if(!is_dir($to.$tmp.$pth[$i])) @mkdir($to.$pth[$i],0777);
+//     $tmp.=$pth[$i]."/";
+//   }
+  if (!$this->_mkdir($to.dirname($header['filename']))) return (-1);   //--CS
+
+  if (!array_key_exists("external", $header) || (!($header['external']==0x41FF0010)&&!($header['external']==16)))
+  {
+   if ($header['compression']==0)
+   {
+    $fp = @fopen($to.$header['filename'], 'wb');
+    if(!$fp) return(-1);
+    $size = $header['compressed_size'];
+
+    while ($size != 0)
+    {
+      $read_size = ($size < 2048 ? $size : 2048);
+      $buffer = fread($zip, $read_size);
+      $binary_data = pack('a'.$read_size, $buffer);
+      @fwrite($fp, $binary_data, $read_size);
+      $size -= $read_size;
+    }
+    fclose($fp);
+    touch($to.$header['filename'], $header['mtime']);
+
+  }else{
+   if (!is_dir(dirname($to.$header['filename']))) $this->_mkdir(dirname($to.$header['filename']));  //-CS
+   $fp = fopen($to.$header['filename'].'.gz','wb');
+   if(!$fp) return(-1);
+   $binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']),
+     Chr(0x00), time(), Chr(0x00), Chr(3));
+
+   fwrite($fp, $binary_data, 10);
+   $size = $header['compressed_size'];
+
+   while ($size != 0)
+   {
+     $read_size = ($size < 1024 ? $size : 1024);
+     $buffer = fread($zip, $read_size);
+     $binary_data = pack('a'.$read_size, $buffer);
+     @fwrite($fp, $binary_data, $read_size);
+     $size -= $read_size;
+   }
+
+   $binary_data = pack('VV', $header['crc'], $header['size']);
+   fwrite($fp, $binary_data,8); fclose($fp);
+
+   $gzp = @gzopen($to.$header['filename'].'.gz','rb');
+    if(!$gzp){
+       @gzclose($gzp); @unlink($to.$header['filename']);
+       die("Archive is compressed whereas ZLIB is not enabled.");
+    }
+   $fp = @fopen($to.$header['filename'],'wb');
+   if(!$fp) return(-1);
+   $size = $header['size'];
+
+   while ($size != 0)
+   {
+     $read_size = ($size < 2048 ? $size : 2048);
+     $buffer = gzread($gzp, $read_size);
+     $binary_data = pack('a'.$read_size, $buffer);
+     @fwrite($fp, $binary_data, $read_size);
+     $size -= $read_size;
+   }
+   fclose($fp); gzclose($gzp);
+
+   touch($to.$header['filename'], $header['mtime']);
+   @unlink($to.$header['filename'].'.gz');
+
+  }}
+  return true;
+ }
+
+ //--CS start
+ // centralize mkdir calls and use dokuwiki io functions
+ function _mkdir($d) {
+    return io_mkdir_p($d);
+ }
+ //--CS end
+
+
+ function ExtractStr($zn, $name) {
+   $ok = 0;
+   $zip = @fopen($zn,'rb');
+   if(!$zip) return(NULL);
+   $cdir = $this->ReadCentralDir($zip,$zn);
+   $pos_entry = $cdir['offset'];
+
+   for ($i=0; $i<$cdir['entries']; $i++)
+   {
+     @fseek($zip, $pos_entry);
+     $header = $this->ReadCentralFileHeaders($zip);
+     $header['index'] = $i;
+     $pos_entry = ftell($zip);
+     @rewind($zip);
+     fseek($zip, $header['offset']);
+     if ($name == $header['stored_filename'] || $name == $header['filename']) {
+       $str = $this->ExtractStrFile($header, $zip);
+       fclose($zip);
+       return $str;
+     }
+
+   }
+   fclose($zip);
+   return null;
+ }
+
+  function ExtractStrFile($header,$zip) {
+    $hdr = $this->readfileheader($zip);
+    $binary_data = '';
+    if (!($header['external']==0x41FF0010) && !($header['external']==16))
+      {
+	if ($header['compression']==0)
+	  {
+	    while ($size != 0)
+	      {
+		$read_size = ($size < 2048 ? $size : 2048);
+		$buffer = fread($zip, $read_size);
+		$binary_data .= pack('a'.$read_size, $buffer);
+		$size -= $read_size;
+	      }
+	    return $binary_data;
+	  } else {
+	    $size = $header['compressed_size'];
+	    if ($size == 0) {
+	      return '';
+	    }
+	    //Just in case
+	    if ($size > ($this->_ret_bytes(ini_get('memory_limit'))/2)) {
+	      die("Compressed file is to huge to be uncompress in memory.");
+	    }
+	    while ($size != 0)
+	      {
+		$read_size = ($size < 2048 ? $size : 2048);
+		$buffer = fread($zip, $read_size);
+		$binary_data .= pack('a'.$read_size, $buffer);
+		$size -= $read_size;
+	      }
+	    $str = gzinflate($binary_data, $header['size']);
+	    if ($header['crc'] == crc32($str)) {
+	      return $str;
+	    } else {
+	      die("Crc Error");
+	    }
+	  }
+      }
+    return NULL;
+  }
+
+ function _ret_bytes($val) {
+   $val = trim($val);
+   $last = $val{strlen($val)-1};
+   switch($last) {
+   case 'k':
+   case 'K':
+     return (int) $val * 1024;
+     break;
+   case 'm':
+   case 'M':
+     return (int) $val * 1048576;
+     break;
+   default:
+     return $val;
+   }
+ }
+}
+