Services/Form/classes/class.ilFileInputGUI.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2007 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. |
        +-----------------------------------------------------------------------------+
*/

class ilFileInputGUI extends ilFormPropertyGUI
{
        
        function __construct($a_title = "", $a_postvar = "")
        {
                parent::__construct($a_title, $a_postvar);
                $this->setType("file");
        }
        
        function setValueByArray($a_values)
        {
        }

        function setSuffixes($a_suffixes)
        {
                $this->suffixes = $a_suffixes;
        }

        function getSuffixes()
        {
                return $this->suffixes;
        }
        
        public function enableFileNameSelection($a_post_var)
        {
                $this->filename_selection = true;
                $this->filename = $a_post_var;
        }
        
        public function isFileNameSelectionEnabled()
        {
                return $this->filename_selection ? true : false;
        }
        
        public function getFileNamePostVar()
        {
                return $this->filename;
        }

        function checkInput()
        {
                global $lng;

                // remove trailing '/'
                while (substr($_FILES[$this->getPostVar()]["name"],-1) == '/')
                {
                        $_FILES[$this->getPostVar()]["name"] = substr($_FILES[$this->getPostVar()]["name"],0,-1);
                }

                $filename = $_FILES[$this->getPostVar()]["name"];
                $filename_arr = pathinfo($_FILES[$this->getPostVar()]["name"]);
                $suffix = $filename_arr["extension"];
                $mimetype = $_FILES[$this->getPostVar()]["type"];
                $size_bytes = $_FILES[$this->getPostVar()]["size"];
                $temp_name = $_FILES[$this->getPostVar()]["tmp_name"];
                $error = $_FILES[$this->getPostVar()]["error"];

                $_POST[$this->getPostVar()] = $_FILES[$this->getPostVar()];
                
                // error handling
                if ($error > 0)
                {
                        switch ($error)
                        {
                                case UPLOAD_ERR_INI_SIZE:
                                        $this->setAlert($lng->txt("form_msg_file_size_exceeds"));
                                        return false;
                                        break;
                                         
                                case UPLOAD_ERR_FORM_SIZE:
                                        $this->setAlert($lng->txt("form_msg_file_size_exceeds"));
                                        return false;
                                        break;
        
                                case UPLOAD_ERR_PARTIAL:
                                        $this->setAlert($lng->txt("form_msg_file_partially_uploaded"));
                                        return false;
                                        break;
        
                                case UPLOAD_ERR_NO_FILE:
                                        if ($this->getRequired())
                                        {
                                                $this->setAlert($lng->txt("form_msg_file_no_upload"));
                                                return false;
                                        }
                                        break;
         
                                case UPLOAD_ERR_NO_TMP_DIR:
                                        $this->setAlert($lng->txt("form_msg_file_missing_tmp_dir"));
                                        return false;
                                        break;
                                         
                                case UPLOAD_ERR_CANT_WRITE:
                                        $this->setAlert($lng->txt("form_msg_file_cannot_write_to_disk"));
                                        return false;
                                        break;
         
                                case UPLOAD_ERR_EXTENSION:
                                        $this->setAlert($lng->txt("form_msg_file_upload_stopped_ext"));
                                        return false;
                                        break;
                        }
                }
                
                // check suffixes
                if ($_FILES[$this->getPostVar()]["tmp_name"] != "" &&
                        is_array($this->getSuffixes()))
                {
                        if (!in_array(strtolower($suffix), $this->getSuffixes()))
                        {
                                $this->setAlert($lng->txt("form_msg_file_wrong_file_type"));
                                return false;
                        }
                }
                
                // virus handling
                if ($_FILES[$this->getPostVar()]["tmp_name"] != "")
                {
                        $vir = ilUtil::virusHandling($temp_name, $filename);
                        if ($vir[0] == false)
                        {
                                $this->setAlert($lng->txt("form_msg_file_virus_found")."<br />".$vir[1]);
                                return false;
                        }
                }
                
                return true;
        }

        function insert(&$a_tpl)
        {
                global $lng;
                
                // show filename selection if enabled
                if($this->isFileNameSelectionEnabled())
                {
                        $a_tpl->setCurrentBlock('filename');
                        $a_tpl->setVariable('POST_FILENAME',$this->getFileNamePostVar());
                        $a_tpl->setVariable('FILENAME_ID',$this->getFieldId());
                        $a_tpl->setVAriable('TXT_FILENAME_HINT',$lng->txt('if_no_title_then_filename'));
                        $a_tpl->parseCurrentBlock();
                }

                $this->outputSuffixes($a_tpl);
                
                $a_tpl->setCurrentBlock("prop_file");
                $a_tpl->setVariable("POST_VAR", $this->getPostVar());
                $a_tpl->setVariable("ID", $this->getFieldId());
                $a_tpl->setVariable("TXT_MAX_SIZE", $lng->txt("file_notice")." ".
                        $this->getMaxFileSizeString());
                $a_tpl->parseCurrentBlock();
        }

        protected function outputSuffixes($a_tpl, $a_block = "allowed_suffixes")
        {
                global $lng;
                
                if (is_array($this->getSuffixes()))
                {
                        $suff_str = $delim = "";
                        foreach($this->getSuffixes() as $suffix)
                        {
                                $suff_str.= $delim.".".$suffix;
                                $delim = ", ";
                        }
                        $a_tpl->setCurrentBlock($a_block);
                        $a_tpl->setVariable("TXT_ALLOWED_SUFFIXES",
                                $lng->txt("file_allowed_suffixes")." ".$suff_str);
                        $a_tpl->parseCurrentBlock();
                }
        }
        
        protected function getMaxFileSizeString()
        {
                // get the value for the maximal uploadable filesize from the php.ini (if available)
                $umf = get_cfg_var("upload_max_filesize");
                // get the value for the maximal post data from the php.ini (if available)
                $pms = get_cfg_var("post_max_size");
                
                //convert from short-string representation to "real" bytes
                $multiplier_a=array("K"=>1024, "M"=>1024*1024, "G"=>1024*1024*1024);
                
                $umf_parts=preg_split("/(\d+)([K|G|M])/", $umf, -1, PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_NO_EMPTY);
        $pms_parts=preg_split("/(\d+)([K|G|M])/", $pms, -1, PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_NO_EMPTY);
        
        if (count($umf_parts) == 2) { $umf = $umf_parts[0]*$multiplier_a[$umf_parts[1]]; }
        if (count($pms_parts) == 2) { $pms = $pms_parts[0]*$multiplier_a[$pms_parts[1]]; }
        
        // use the smaller one as limit
                $max_filesize = min($umf, $pms);

                if (!$max_filesize) $max_filesize=max($umf, $pms);
        
        //format for display in mega-bytes
                $max_filesize = sprintf("%.1f MB",$max_filesize/1024/1024);
                
                return $max_filesize;
        }
}