<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Upload_image
{
    private $ci;
    private $upload_path;
    private $copies;
    private $allowed_types;
    private $max_size;
    private $input;
 
	function __construct($props = array())
	{
        $this->ci =& get_instance();
        $this->ci->load->library('upload');
        $this->ci->load->library('image_lib');
		if (count($props) > 0)
		{
			$this->initialize($props);
		}
	}
 
	function initialize($config = array())
	{
		$defaults = array('copies' => false,
                          'allowed_types' => 'jpg|jpeg|gif|png',
                          'max_size' => '2000',
                          'input' => 'picture',
                          'copies' => array(),
                          'upload_path' => ''
                          );	
		foreach ($defaults as $key => $val)
		{
            $this->$key = isset($config[$key]) ? $config[$key] : $val;
		}
	}
 
    function upload()
    {
        $config['upload_path']   = $this->upload_path;
        $config['allowed_types'] = $this->allowed_types;
        $config['max_size']      = $this->max_size;
        $this->ci->upload->initialize($config);
 
        if ($this->ci->upload->do_upload($this->input))
        {        
            $upload = $this->ci->upload->data();            
 
            // Set image name
            while (true) 
            {
                $img_name = uniqid().$upload['file_ext'];
                if (!file_exists($upload['file_path'].$img_name)) break;
            }                                      
            rename($upload['full_path'], $upload['file_path'].$img_name);
 
            // Creating image copies
            if (count($this->copies) > 0)
            {
                foreach ($this->copies as $copy)
                {
                    $resize_config = array('file_name' => $img_name,
                                           'source_path' => $upload['file_path'],
                                           'copy' => $copy);                       
                    $this->resize($resize_config);       
                }
            }
            return $img_name;
        }
        return false;
    }
 
    function resize($init)
    {               
        $config = array('source_image' => $init['source_path'].$init['file_name'],
                        'new_image' => $init['copy']['upload_path'].$init['file_name']);
        list($img['image_width'], $img['image_height'], $img['type'], $img['attr']) = getimagesize($config['source_image']);                        
 
        if ($init['copy']['crop'])
        {
            // Resize to make smaller edge = selected size
            if ($img['image_width'] > $img['image_height'])
            {
                $config['height'] = $init['copy']['height'];
                $ratio = $init['copy']['height'] / $img['image_height'];
                $config['width'] = $img['image_width'] * $ratio;
            }
            else
            {
                $config['width'] = $init['copy']['width'];
                $ratio = $init['copy']['width'] / $img['image_width'];
                $config['height'] = $img['image_height'] * $ratio;
            }                                    
            $this->ci->image_lib->initialize($config);
            $this->ci->image_lib->resize();                                                   
            $config['width'] = $init['copy']['width'];
            $config['height'] = $init['copy']['height'];            
            $config['maintain_ratio'] = false;
            $config['source_image'] = $config['new_image'];
            unset($config['new_image']);
            $this->ci->image_lib->initialize($config);                                        
            $this->ci->image_lib->crop();                         
        }
        else
        {                    
            // Width adjustment
            if ($img['image_width'] > $init['copy']['width'])
            {
                $config['width'] = $init['copy']['width'];
                $ratio = $init['copy']['width'] / $img['image_width'];
                $config['height'] = $img['image_height'] * $ratio;
            }
 
            // Height adjustment
            if ($config['height'] > $init['copy']['height'])
            {
                $config['height'] = $init['copy']['height'];
                $ratio = $init['copy']['height'] / $img['image_height'];
                $config['width'] = $img['image_width'] * $ratio;
            }
 
            $this->ci->image_lib->initialize($config);
            $this->ci->image_lib->resize();                
        }
    }
 
}
 
// End of file
 
// Using
 
$this->load->library('upload_image');
$upload_path = './uploads/property/';
$copies[] = array('upload_path' => $upload_path.'mid/', 'width' => 90, 'height' => 75, 'crop' => false);
$copies[] = array('upload_path' => $upload_path.'small/', 'width' => 50, 'height' => 50, 'crop' => true);
$config = array('upload_path' => $upload_path.'original/', 'input' => 'picture', 'copies' => $copies);
$this->upload_image->initialize($config);
$result = $this->upload_image->upload();
echo $result ? 'Image '.$result.' was uploaded successfully' : 'Image was not uploaded';