<?php

//this script may only be included - so its better to die if called directly.
if (strpos($_SERVER["SCRIPT_NAME"],basename(__FILE__)) !== false) {
  header("location: index.php");
  exit;
}


# 
# PHPZip v1.2 by Sext (sext@neud.net) 2002-11-18
# 	(Changed: 2003-03-01)
# 
# Makes zip archive
#
# Based on "Zip file creation class", uses zLib
# Modification pour prendre en compte la décompression d'un zip  (c) @PICNet 2004
#

APIC::import("org.apicnet.io.File");

class CZip {

	function CZip(){}

	function Zip($dir, $zipfilename){
    	if (@function_exists('gzcompress')) {
			
			$file = new File($zipfilename, TRUE);
			if ($file->exists()) {
				$file->delFile();
				$file->createFile();
			}
			
			$curdir = getcwd();
			if (is_array($dir)) {
					$filelist = $dir;
			} else {
				$filelist = $this -> GetFileList($dir);
			}
			
			
			if ((!empty($dir))&&(!is_array($dir))&&(file_exists($dir))) chdir($dir);
			else chdir($curdir);

			if (count($filelist)>0) {
				$root = dirname ($filelist[0]);
				foreach($filelist as $filename) {
					if (is_file($filename)) {
						$fd = fopen ($filename, "r");
						$content = fread ($fd, filesize ($filename));
						fclose ($fd);
						
						
						if (is_array($dir)) {
							$dirname  = dirname($filename);
							$filename = basename($filename);
							if ($dirname != $root) $filename = str_replace($root."/", "", $dirname)."/".$filename;
						}
						
						$this -> addFile($content, $filename);
					}
				}
				$out = $this -> file();

				chdir($curdir);
				$fp = fopen($zipfilename, "w");
				fwrite($fp, $out, strlen($out));
				fclose($fp);
			}
			return 1;
		} 
		else return 0;
	}

	function GetFileList($dir){
		if (file_exists($dir)) {
			$args = func_get_args();
			$pref = $args[1];
   	
			$dh = opendir($dir);
			while($files = readdir($dh)) {
				if (($files!=".")&&($files!="..")) {
					if (is_dir($dir.$files)) {
						$curdir = getcwd();
						chdir($dir.$files);
						$file = array_merge($file, $this -> GetFileList("", "$pref$files/"));
						chdir($curdir);
					}
					else $file[]=$pref.$files;
				}
			}
			closedir($dh);
		}
		return $file;
	}

    var $datasec      = array();
    var $ctrl_dir     = array();
    var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
    var $old_offset   = 0;

    /**
     * Converts an Unix timestamp to a four byte DOS date and time format (date
     * in high two bytes, time in low two bytes allowing magnitude comparison).
     *
     * @param  integer  the current Unix timestamp
     *
     * @return integer  the current date in a four byte DOS format
     *
     * @access private
     */
    function unix2DosTime($unixtime = 0) {
        $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);

        if ($timearray['year'] < 1980) {
        	$timearray['year']    = 1980;
        	$timearray['mon']     = 1;
        	$timearray['mday']    = 1;
        	$timearray['hours']   = 0;
        	$timearray['minutes'] = 0;
        	$timearray['seconds'] = 0;
        } // end if

        return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
                ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
    } // end of the 'unix2DosTime()' method


    /**
     * Adds "file" to archive
     *
     * @param  string   file contents
     * @param  string   name of the file in the archive (may contains the path)
     * @param  integer  the current timestamp
     *
     * @access public
     */
    function addFile($data, $name, $time = 0){
        $name     = str_replace('\\', '/', $name);

        $dtime    = dechex($this->unix2DosTime($time));
        $hexdtime = '\x' . $dtime[6] . $dtime[7]
                  . '\x' . $dtime[4] . $dtime[5]
                  . '\x' . $dtime[2] . $dtime[3]
                  . '\x' . $dtime[0] . $dtime[1];
        eval('$hexdtime = "' . $hexdtime . '";');

        $fr   = "\x50\x4b\x03\x04";
        $fr   .= "\x14\x00";            // ver needed to extract
        $fr   .= "\x00\x00";            // gen purpose bit flag
        $fr   .= "\x08\x00";            // compression method
        $fr   .= $hexdtime;             // last mod time and date

        // "local file header" segment
        $unc_len = strlen($data);
        $crc     = crc32($data);
        $zdata   = gzcompress($data);
        $c_len   = strlen($zdata);
        $zdata   = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
        $fr      .= pack('V', $crc);             // crc32
        $fr      .= pack('V', $c_len);           // compressed filesize
        $fr      .= pack('V', $unc_len);         // uncompressed filesize
        $fr      .= pack('v', strlen($name));    // length of filename
        $fr      .= pack('v', 0);                // extra field length
        $fr      .= $name;

        // "file data" segment
        $fr .= $zdata;

        // "data descriptor" segment (optional but necessary if archive is not
        // served as file)
        $fr .= pack('V', $crc);                 // crc32
        $fr .= pack('V', $c_len);               // compressed filesize
        $fr .= pack('V', $unc_len);             // uncompressed filesize

        // add this entry to array
        $this -> datasec[] = $fr;
        $new_offset        = strlen(implode('', $this->datasec));

        // now add to central directory record
        $cdrec = "\x50\x4b\x01\x02";
        $cdrec .= "\x00\x00";                // version made by
        $cdrec .= "\x14\x00";                // version needed to extract
        $cdrec .= "\x00\x00";                // gen purpose bit flag
        $cdrec .= "\x08\x00";                // compression method
        $cdrec .= $hexdtime;                 // last mod time & date
        $cdrec .= pack('V', $crc);           // crc32
        $cdrec .= pack('V', $c_len);         // compressed filesize
        $cdrec .= pack('V', $unc_len);       // uncompressed filesize
        $cdrec .= pack('v', strlen($name) ); // length of filename
        $cdrec .= pack('v', 0 );             // extra field length
        $cdrec .= pack('v', 0 );             // file comment length
        $cdrec .= pack('v', 0 );             // disk number start
        $cdrec .= pack('v', 0 );             // internal file attributes
        $cdrec .= pack('V', 32 );            // external file attributes - 'archive' bit set

        $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
        $this -> old_offset = $new_offset;

        $cdrec .= $name;

        // optional extra field, file comment goes here
        // save to central directory
        $this -> ctrl_dir[] = $cdrec;
    } // end of the 'addFile()' method


    /**
     * Dumps out file
     *
     * @return  string  the zipped file
     *
     * @access public
     */
    function file(){
        $data    = implode('', $this -> datasec);
        $ctrldir = implode('', $this -> ctrl_dir);

        return
            $data .
            $ctrldir .
            $this -> eof_ctrl_dir .
            pack('v', sizeof($this -> ctrl_dir)) .  // total # of entries "on this disk"
            pack('v', sizeof($this -> ctrl_dir)) .  // total # of entries overall
            pack('V', strlen($ctrldir)) .           // size of central dir
            pack('V', strlen($data)) .              // offset to start of central dir
            "\x00\x00";                             // .zip file comment length
    } // end of the 'file()' method

	
	function createDir($dir){
		if (eregi("(\/$)", $dir)) @mkdir (substr($dir, 0, strlen($dir) - 1));
		else @mkdir ($dir);
	}
	
	
	function createFile($file, $data){
		$file = new File($file, TRUE);
		if ($file->exists()) {
			$file->delFile();
			$file->createFile();
		}
		$file->writeData($data);
	}
	
	
	function extract($dir, $zipfilename){
		if (function_exists("zip_open")) {
			//$dir  = eregi_replace("(\..*$)", "", $zipfilename);
			$this->createDir($dir);
			$zip  = zip_open($zipfilename);
			if ($zip) {
			   while ($zip_entry = zip_read($zip)) {
			       if (zip_entry_open($zip, $zip_entry, "r")) {
			           $buf = zip_entry_read($zip_entry, zip_entry_filesize($zip_entry));
					   if (eregi("(\/)", zip_entry_name($zip_entry))) $this->createDir($dir."/".eregi_replace("\/.*$", "", zip_entry_name($zip_entry))); 
					   $this->createFile($dir."/".zip_entry_name($zip_entry), $buf);
			           zip_entry_close($zip_entry);
			       }
			   }
			   zip_close($zip);
			}
		} 
	}
	

} // end of the 'PHPZip' class
