class.ilFileSystemStorage.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2006 ILIAS open source, University of Cologne            |
        |                                                                             |
        | This program is free software; you can redistribute it and/or               |
        | modify it under the terms of the GNU General Public License                 |
        | as published by the Free Software Foundation; either version 2              |
        | of the License, or (at your option) any later version.                      |
        |                                                                             |
        | This program 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 General Public License for more details.                                |
        |                                                                             |
        | You should have received a copy of the GNU General Public License           |
        | along with this program; if not, write to the Free Software                 |
        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/

abstract class ilFileSystemStorage
{
        const STORAGE_WEB = 1;
        const STORAGE_DATA = 2;
        
        const FACTOR = 100;
        const MAX_EXPONENT = 3;
        
        
        private $container_id;
        private $storage_type;
        private $path_conversion = false;

        protected $path;
        
        public function __construct($a_storage_type,$a_path_conversion,$a_container_id)
        {
                $this->storage_type = $a_storage_type;
                $this->path_conversion = $a_path_conversion;
                $this->container_id = $a_container_id;

                // Get path info
                $this->init();
        }
        
        public function getContainerId()
        {
                return $this->container_id;
        }
        
        public static function _createPathFromId($a_container_id,$a_name)
        {
                $path = array();
                $found = false;
                $num = $a_container_id;
                for($i = self::MAX_EXPONENT; $i > 0;$i--)
                {
                        $factor = pow(self::FACTOR,$i);
                        if(($tmp = (int) ($num / $factor)) or $found)
                        {
                                $path[] = $tmp;
                                $num = $num % $factor;
                                $found = true;
                        }       
                }

                if(count($path))
                {
                        $path_string = (implode('/',$path).'/');
                }
                return $path_string.$a_name.'_'.$a_container_id;
        }
        
        abstract protected function getPathPrefix();
        
        abstract protected function getPathPostfix();
        
        public function create()
        {
                if(!file_exists($this->path))
                {
                        ilUtil::makeDirParents($this->path);
                }
                return true;
        }
        
        
        public function getAbsolutePath()
        {
                return $this->path;
        }
        
        protected function init()
        {
                switch($this->storage_type)
                {
                        case self::STORAGE_DATA:
                                $this->path = ilUtil::getDataDir();
                                break;
                                
                        case self::STORAGE_WEB:
                                $this->path = ilUtil::getWebspaceDir();
                                break;
                }
                $this->path = ilUtil::removeTrailingPathSeparators($this->path);
                $this->path .= '/';
                
                // Append path prefix
                $this->path .= ($this->getPathPrefix().'/');
                
                if($this->path_conversion)
                {
                        $this->path .= self::_createPathFromId($this->container_id,$this->getPathPostfix());
                }
                else
                {
                        $this->path .= ($this->getPathPostfix().'_'.$this->container_id);
                }
                return true;
        }
        
        public function writeToFile($a_data,$a_absolute_path)
        {
                if(!$fp = @fopen($a_absolute_path,'w+'))
                {
                        return false;
                }
                if(@fwrite($fp,$a_data) === false)
                {
                        @fclose($fp);
                        return false;
                }
                @fclose($fp);
                return true;            
        }
        
        public function deleteFile($a_abs_name)
        {
                if(@file_exists($a_abs_name))
                {
                        @unlink($a_abs_name);
                        return true;
                }
                return false;
        }
        
        function deleteDirectory($a_abs_name)
        {
                if(@file_exists($a_abs_name))
                {
                        ilUtil::delDir($a_abs_name);
                        return true;
                }
                return false;
        }
        
        
        public function delete()
        {
                return ilUtil::delDir($this->getAbsolutePath());
        }
        
        
        public function copyFile($a_from,$a_to)
        {
                if(@file_exists($a_from))
                {
                        @copy($a_from,$a_to);
                        return true;
                }
                return false;
        }
        
        public function _copyDirectory($a_source,$a_target)
        {
                return ilUtil::rCopy($a_source,$a_target);
        }
        
        public function appendToPath($a_appendix)
        {
                $this->path .= $a_appendix;
        }
        
        public function getStorageType()
        {
                return $this->storage_type;
        }
        
        function getPath()
        {
                return $this->path;
        }
        
}

?>