<?php
/*
 *    class upload
 *    easy thumb creator
 *
 *    Copyright :(C) 2007 Tomasz Kołodziejski
 *
 *    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 (at your option) 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
class upload{

    private $types=array('image/jpeg', 'image/gif', 'image/png');
    private $upload_dir='images';
    private $permissions=0777;
    private $defaultWidth=100;
    private $defaultHeight=100;
    private $error=false;
    
    public function save($file){
        if(isset($_FILES[$file])){
            $file=$_FILES[$file];
            if($file['error']==0){//jeśli napotkano błąd
                if(is_uploaded_file($file['tmp_name'])){//jeśli wysłano plik
                    if(in_array($file['type'], $this->types)){
                        $this->name=$file['name'];
                        $this->type=$file['type'];
                        $this->filename=$this->upload_dir.'/'.$file['name'];
                        move_uploaded_file($file['tmp_name'], $this->filename);//przesuwamy go do odpowiedniego katalogu
                        chmod($this->filename, $this->permissions);
                        
                        return true;
                    }else{
                        echo 'niepoprawny mime - <code>'.$file['type'];
                        return false;
                    }
                }else{
                    // Możliwy atak hakerski
                    $this->error=true;
                    return false;
                }
            }else{
                // błąd
                $this->error=true;
                return false;
            }
        }else{
            // nie wysłano obrazka
            return false;
        }
    }
    
    public function thumb($prefix, $width=0, $height=0){
        if(!$this->error){
            
            // = directory + filename
            $filename = $this->filename;
            
            if($width==0){
                $width=$this->defaultwidth;
            }
            if($height==0){
                $height=$this->defaultheight;
            }
        
    
            // check imagetype
            $type=exif_imagetype($filename);
            
            // you can use various type
            switch($type){
                case IMAGETYPE_GIF:
                    $image=imagecreatefromgif($filename);
                    break;
                case IMAGETYPE_JPEG:
                    $image=imagecreatefromjpeg($filename);
                    break;
                case IMAGETYPE_PNG:
                    $image=imagecreatefrompng($filename);
                    break;
            }
            
            // Get new dimensions
            list($width_orig, $height_orig) = getimagesize($filename);
            
            $ratio_orig = $width_orig/$height_orig;
            
            if ($width/$height > $ratio_orig) {
                $width = $height*$ratio_orig;
            } else {
                $height = $width/$ratio_orig;
            }
            
            // create new image
            $image_p = imagecreatetruecolor($width, $height);
            
            // fill the new image white
            $white = imagecolorallocate($image_p, 0xff, 0xff, 0xff);
            imagefill($image_p, 0, 0, $white);
            
            // resize
            imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);
            
            // new_filename = directory + prefix + filename
            $new_filename= $this->upload_dir. '/' .$prefix . $this->name;
            
            // save image
            switch($type){
                case IMAGETYPE_GIF:
                    imagegif($image_p, $new_filename);
                    break;
                case IMAGETYPE_JPEG:
                    imagejpeg($image_p, $new_filename);
                    break;
                case IMAGETYPE_PNG:
                    imagepng($image_p, $new_filename);
                    break;
            }
            
            // change permission
            chmod($new_filename, $this->permissions);
        }
    }
}

?>