<?php
  /**************************************************************************\
  * phpGroupWare API - VFS                                                   *
  * This file written by Dan Kuykendall <seek3r@phpgroupware.org>            *
  * This class handled file/dir access for phpGroupWare                      *
  * Copyright (C) 2000, 2001 Dan Kuykendall                                  *
  * -------------------------------------------------------------------------*
  * This library is part of the phpGroupWare API                             *
  * http://www.phpgroupware.org/api                                          * 
  * ------------------------------------------------------------------------ *
  * This library is free software; you can redistribute it and/or modify it  *
  * under the terms of the GNU Lesser General Public License as published by *
  * the Free Software Foundation; either version 2.1 of the License,         *
  * or any later version.                                                    *
  * This library is distributed in the hope that it will be useful, but      *
  * WITHOUT ANY WARRANTY; without even the implied warranty of               *
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                     *
  * See the GNU Lesser General Public License for more details.              *
  * You should have received a copy of the GNU Lesser General Public License *
  * along with this library; if not, write to the Free Software Foundation,  *
  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA            *
  \**************************************************************************/

  /* $Id$ */
		/*!
		@class vfs
		@abstract virtual file system
		@discription Author: Seek3r
		*/
  class vfs
  {
  var $basedir;
 		/*!
 		@function sanitize
 		@abstract ?
 		*/
    function sanitize($string) {
      global $phpgw, $phpgw_info;
      $sep = $phpgw_info["server"]["dir_separator"];
      return(ereg_replace( "^\.+", "",str_replace($sep, "",strrchr($string,$sep))));
    }
		/*!
		@function securitycheck
		@abstract security check function
		@discussion need detail here ?
		*/
    function securitycheck($string) {
      if(substr($string,0,1) ==  "." || substr($string,0,1) ==  "\\" || strstr($string, "..") || strstr($string, "\\..") || strstr($string, ".\\.")) {
        return False;
      }else{
        return True;
      }
    }
		/*!
		@functino rawname2array
		@abstract take raw filename including path and return file name
		@param $string raw filename
		@result $file filename
		*/
    function rawname2array($string) {
      global $phpgw, $phpgw_info;
      $sep = $phpgw_info["server"]["dir_separator"];
      
      if(substr($string,0,1) == $sep) {
        // we have a starting slash...
        $sub = substr($string,1);  // take everything past the first slash... 
        $basedir = substr($sub,0,strpos($sub,$sep));  // ...to the second slash 
        if (!$basedir){
          $basedir = substr($sub,strpos($sub,$sep));  // it becomes the basedir 
        }else{
          $file = substr($sub,strpos($sub,$sep));  // take everything after the second slash. 
        }
      } else {
         // we have no starting slash... 
        $basedir = $phpgw->common->appsession();
        $file = $string;
      }
      
      // security check (might want to spin this into it's own function...) 
      if(substr($file,0,1) ==  "." || substr($file,0,1) ==  "\\" || strstr($file, "..") || strstr($file, "\\..") || strstr($file, ".\\.")) {
        return False;
      }
      return(array( "basedir" => $basedir,  "file" => $file));
    }
		/*!
		@function getabsolutepath
		@abstract get the absolute path
		@param $target defaults to False
		*/      
    function getabsolutepath($target = False) {
      global $phpgw, $phpgw_info;
      $sep = $phpgw_info["server"]["dir_separator"];
      $basedir = $phpgw_info["server"]["files_dir"].$sep."groups";
      $currentdir = $phpgw->common->appsession();
      if(!$this->securitycheck($target)) {
        return False;
      } else {
        $dir_array = explode($sep,$target);
        $dir_count = count($dir_array);
        if (substr ($target, 0, 1) != $sep){
          if (!empty($currentdir)){
            $basedir .= $currentdir;
          }
        }
        for ($diridx=0;$diridx<$dir_count;++$diridx) {
          if (!empty($dir_array[$diridx])){
            $basedir .= $sep.$dir_array[$diridx];
          }
        }
        return $basedir = ereg_replace ($phpgw_info["server"]["files_dir"].$sep."groups".$sep."home", $phpgw_info["server"]["files_dir"].$sep."users".$sep.$phpgw_info["user"]["userid"], $basedir);
      }
    }
		/*!
		@function ls
		@abstract get directory listing
		@param $target Default False
		@param $checksubdirs "Yes" or "No" defaults to "No"
		@result array
		*/
    function ls($target = False, $checksubdirs = "No") {
      global $phpgw, $phpgw_info;
      $sep = $phpgw_info["server"]["dir_separator"];
      if(!$this->securitycheck($target)) {
        return False;
      } else {
        $basedir = $this->getabsolutepath($target);
        if ($basedir == $phpgw_info["server"]["files_dir"].$sep."groups".$sep || $target == "/"){
        //if ($basedir == $phpgw_info["server"]["files_dir"].$sep."groups".$sep){
          if ($checksubdirs == "Yes"){ //if its a dir, does that dir have subdirs?
            $path = $phpgw_info["server"]["files_dir"].$sep."users".$sep.$phpgw_info["user"]["userid"];
            $subdir = dir($path);
            while($subentry=$subdir->read()) {
              $subpath = $path.$sep.$subentry;
              $subtype = filetype($subpath);
              if ($subentry != "." && $subentry != ".." && $subtype == "dir"){
                $hassubdir = True;
              }
            }
          }
          $list[] = array("name" => "home", "type"  => "dir", "subdirs" => $hassubdir);
	        $hassubdir = False;
          $groups = $phpgw->accounts->get_list('groups');
          if (!empty ($groups[0]['account_lid'])) {
            $group_count = count($groups);
            for ($groupidx=0;$groupidx<$group_count;++$groupidx) {
              $this->verifydir("group",$groups[$groupidx]['account_lid']);
              if ($checksubdirs == "Yes"){ //if its a dir, does that dir have subdirs?
                $path = $phpgw_info["server"]["files_dir"].$sep."groups".$sep.$groups[$groupidx]['account_lid'];
                $subdir = dir($path);
                while($subentry=$subdir->read()) {
                  $subpath = $path.$sep.$subentry;
                  $subtype = filetype($subpath);
                  if ($subentry != "." && $subentry != ".." && $subtype == "dir"){
                    $hassubdir = True;
                  }
                }
              }
              $list[] = array("name" => $groups[$groupidx]['account_lid'], "type"  => "dir", "subdirs" => $hassubdir);
	            $hassubdir = False;
            }
          }
	        return $list;
        }elseif (is_dir($basedir)){ //if basedir is a directory, then we fill the array
          $dir = dir($basedir);
          while($entry=$dir->read()) {
            if ($entry != "." && $entry != ".." ){ //make sure we filter out . and ..
              $path = $basedir.$sep.$entry;
              if (filetype($path) == "dir"){
                $entrytype = "dir";
                if ($checksubdirs == "Yes"){ //if its a dir, does that dir have subdirs?
                  $subdir = dir($path);
                  while($subentry=$subdir->read()) {
                    $subpath = "$path$sep$subentry";
                    $subtype = filetype($subpath);
                    if ($subentry != "." && $subentry != ".." && $subtype == "dir"){
                      $hassubdir = True;
                    }
                  }
                }
                $list[] = array("name" => $entry, "type"  => $entrytype, "subdirs" => $hassubdir);
              }
              if (filetype($path) == "file"){
                $entrytype = "file";
                $entrysize = filesize($path);
                $entrymodifiedtime = filemtime($path);
                $list[] = array("name" => $entry, "type"  => $entrytype, "size" => $entrysize, "modified" =>$entrymodifiedtime);
              }
            }
          }
          $dir->close();
	        return $list;
	      }elseif(is_file($basedir)){
          $dir_array = explode($sep,$basedir);
          unset($basedir);
          $dir_count = count($dir_array);
          for ($diridx=0;$diridx<($dir_count-1);++$diridx) {
            if (!empty($dir_array[$diridx])){
              $basedir .= $sep.$dir_array[$diridx];
            }
          }
          if (!is_dir($basedir) && !is_file($basedir)){
            return False;
          }elseif (is_dir($basedir)) {
            $file = $dir_array[$dir_count];
          }
        }
      }
    }
		/*!
		@function dir
		@abstract a shortcut to ls
		@param $target target default False
		@param $checksubdirs default "No"
		*/
    function dir($target, $checksubdirs) {
      return $this->ls($target, $checksubdirs);
    }
		/*!
		@function cd
		@abstract change directory
		@param $target default "/"
		@param $targettype default "relative" 
		*/ 	   
    function cd ($target = "/", $targettype = "relative"){
      global $phpgw, $phpgw_info;
      $sep = $phpgw_info["server"]["dir_separator"];
      if ($targettype == "relative"){
        $basedir = $this->getabsolutepath($target);
      }else{
        $basedir = $target;
      }
      $currentdir = $phpgw->common->appsession();
      if (substr ($target, 0, 1) != $sep){
        if (!empty($currentdir)){
          $appsession_dir = $currentdir.$sep.$target;
        }
      }else{
        $appsession_dir = $target;
      }
      if (!is_dir($basedir)){
        return False;
      }else{
        $var = chdir ($basedir);
        if ($var){
          $phpgw->common->appsession($appsession_dir);
          return True;
        }else{
          return False;
        }
      }
    }
		/*!
		@function pwd
		@abstract current working dir
		@result $currentdir currentdir
		*/
    function pwd() {
      global $phpgw;
      $currentdir = $phpgw->common->appsession();
      if ($currentdir == ""){$currentdir = "/";}
      return $currentdir;
    }
		/*!
		@function read
		@abstract read file
		@param $file filename
		@result $contents contents
		*/
    function read($file) {
      global $phpgw_info;
      $path = $this->getabsolutepath($file);
      if ($fp = fopen($path, "r")) {
        $contents = fread($fp, filesize($path));
        fclose($fp);
        return $contents;
      } else {
	      return False;
	    }
    }
		/*!
		@function write
		@abstract write to a file
		@param $file file name
		@param $contents contents
		@result int 1 for success 0 if not
		*/		
    function write($file, $contents) {
      global $phpgw_info;
      $path = $this->getabsolutepath($file);
      umask(000);
      if ($fp = fopen($path, "w")) {
	      fputs($fp, $contents, strlen($contents));
	      fclose($fp);
	      return 1;
      } else {
	      return 0;
      }
    }
		/*!
		@function cp
		@abstract copy
		@param $fromfile from filename
		@param $tofile to filename
		@param $from_absolute default ""
		@result boolean based on success
		*/
    function cp($fromfile, $tofile, $from_absolute = "") {
      global $phpgw_info;
      if ($from_absolute){
        $frompath = $fromfile;
      }else{
        $frompath = $this->getabsolutepath($fromfile);
      }
      $topath = $this->getabsolutepath($tofile);
      umask(000);
      if (!copy($frompath, $topath)) {
        return False;
      }else{
        return True;
      }
    }

    function copy($fromfile, $tofile) {
      umask(000);
      return $this->cp($fromfile, $tofile);
    }
		/*!
		@function mv
		@abstract movie file
		@param $fromfile from filename
		@param $tofile to filename
		@param $from_absolute default False
		@result boolean True if it was successfull
		*/
    function mv($fromfile, $tofile, $from_absolute = False) {
      global $phpgw_info;
      if ($from_absolute){
        $frompath = $fromfile;
      }else{
        $frompath = $this->getabsolutepath($fromfile);
      }
      $topath = $this->getabsolutepath($tofile);
      umask(000);
      if (!copy($frompath, $topath)) {
        return False;
      }else{
        if (!unlink($frompath)) {
          return False;
        }else{
          return True;
        }
      }
    }
		/*!
		@function move
		@abstract shortcut to mv
		*/
    function move($fromfile, $tofile, $from_absolute) {
      umask(000);
      return $this->mv($fromfile, $tofile, $from_absolute);
    }
		/*!
		@function rm
		@abstract remove or delete a file
		@param $file filename
		@result boolean true on success
		*/
    function rm($file) {
      global $phpgw_info;
      $path = $this->getabsolutepath($file);
      if (!unlink($path)) {
        return False;
      }else{
        return True;
      }
    }
		/*!
		@function delete
		@abstract shortcut to rm
		*/
    function delete($file) {
      return $this->rm($file);
    }
		/*!
		@function rmdir
		@abstract remvoe a dir
		@param $dir dirname
		@result boolean true for sucdess
		*/
    function rmdir($dir) {
      global $phpgw_info;
      $path = $this->getabsolutepath($dir);
      if (!rmdir($path)) {
        return False;
      }else{
        return True;
      }
    }
		/*!
		@function mkdir
		@abstract make a new directory
		@param $dir
		@result boolean True on success
		*/
    function mkdir($dir) {
      global $phpgw_info;
      $path = $this->getabsolutepath($dir);
      umask(000);
      if (!mkdir($path, 01770)) {
        return False;
      }else{
        return True;
      }
    }
		/*!
		@function verifydir
		@abstract verify directories have correct permissions
		@param $type default "user"
		@param $account default False
		*/
		
    function verifydir($type = "user", $account = False) {
      global $phpgw_info;

      if (!$account){
        $path = "/home";
      }else{
        $path = "/".$account;
      }

      if (!is_dir ($this->getabsolutepath($path))) {
        if (!$this->mkdir ($path)) {
          $msg = "To correct this error you will need to properly set the "
	          . "permissions to the files/users directory.<br> "
            ."On *nix systems please type: chmod 770 ";

          if ($type = "user"){
	          $msg .= $phpgw_info["server"]["files_dir"] . "/users/";
	        }else{
	          $msg .= $phpgw_info["server"]["files_dir"] . "/groups/";
          }	        
          echo $msg;
          return False;
	      }else{
          return True;
        }
      }else{
        return True;
      }
    }


  }