class.ilFilePreviewRenderer.php

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<?php
/* Copyright (c) 1998-2012 ILIAS open source, Extended GPL, see docs/LICENSE */
 
include_once("./Services/Preview/classes/class.ilPreviewRenderer.php");
 
abstract class ilFilePreviewRenderer extends ilPreviewRenderer
{
        public final function getSupportedRepositoryTypes()
        {
                return array("file");
        }
        
        public function supports($preview)
        {
                // let parent check first
                if (!parent::supports($preview))
                        return false;
                
                // get file extension
                require_once("./Modules/File/classes/class.ilObjFile.php");
                include_once './Modules/File/classes/class.ilObjFileAccess.php';
                $filename = ilObjFile::_lookupFileName($preview->getObjId());
                $ext = ilObjFileAccess::_getFileExtension($filename);
                
                // contains that extension?
                return in_array($ext, $this->getSupportedFileFormats());
        }
        
        public function prepareFileForExec($filepath)
        {
                $pos = strrpos($filepath, "/");
                $name = $pos !== false ? substr($filepath, $pos + 1) : $filepath;
                
                // if the file path contains any characters that could cause problems
                // we copy the file to a temporary file
                $normName = preg_replace("/[^A-Za-z0-9.\- +_&]/", "", $name);
                if ($normName != $name)
                {
                        $tempPath = ilUtil::ilTempnam();
                        if (copy($filepath, $tempPath))
                                return $tempPath;
                }
                
                return $filepath;
        }
        
        public abstract function getSupportedFileFormats();
}
?>