<?php

/**

 * GeoContexter

 * @link http://code.google.com/p/geocontexter/

 * @package GeoContexter

 */



/**

 * Upload image in folder and create thumbnail from

 *

   USAGE:

   <pre>

   $image = new Geocontexter_Model_ImageUpload;



   $params  = array('post_name'   => string,  // as defined in $_FILES

                    'data_folder' => string   // full path to the image directory

                    );



   $result  = $image->upload( $params );



   if($result instanceof Mozend_ModelError)

   {

       return $this->error( $result->getErrorString(), __file__, __line__ );

   }



   </pre>

 * @package GeoContexter

 * @subpackage Module_Geocontexter

 * @license http://www.opensource.org/licenses/bsd-license.php New BSD License

 * @author Armand Turpel <geocontexter@gmail.com>

 * @version $Rev: 768 $ / $LastChangedDate: 2010-12-16 16:11:56 +0100 (jeu., 16 d?Šc. 2010) $ / $LastChangedBy: armand.turpel $

 */



class Geocontexter_Model_ImageUpload extends Mozend_Model

{

    /**

     * upload image

     */

    public function upload( $params )

    {

        try

        {

            $this->adapter = new Zend_File_Transfer_Adapter_Http( array('ignoreNoFile' => true) );



            $this->adapter->addValidator('Size', false, 1000000);



            $this->adapter->addValidator('ImageSize', false,

                                      array('minwidth'  => 100,

                                            'maxwidth'  => 2000,

                                            'minheight' => 100,

                                            'maxheight' => 2000)

                                  );



            $this->adapter->setValidators(array('Extension' => array('jpg', 'jpeg', 'gif', 'png')));



            $this->set_params( $params );



            $this->path  = $params['data_folder'];

            $this->_file = $this->file_info[$params['post_name']];



            // test if image upload

            //

            if(empty($this->file_info[$params['post_name']]['tmp_name']) || empty($this->file_info[$params['post_name']]['name']))

            {

                throw new Exception('Upload image failed. Uploaded file dosent exists in $_FILES');

            }



            $this->create_files_folder( $params['data_folder'] );



            $this->adapter->setDestination( $params['data_folder'] );



            if (!$this->adapter->receive())

            {

                $this->set_error($this->adapter->getMessages());

                throw new Exception('File upload error');

            }

            else

            {

                $this->build_thumbnail($params['data_folder'], $this->file_info[$params['post_name']]);



                return $this->file_info[$params['post_name']];

            }

        }

        catch(Exception $e)

        {

            $this->removeFile();



            return new Mozend_ModelError( $this->get_error() );

        }

    }



    /**

     * validate parameters

     *

     * @param array $params

     */

    private function set_params( & $params )

    {

        if(!isset($params['post_name']))

        {

            throw new Exception('post_name field isnt defined');

        }



        if(false === is_string($params['post_name']))

        {

            throw new Exception('post_name isnt from type string');

        }



        $this->file_info = $this->adapter->getFileInfo();



        if(!isset($this->file_info[$params['post_name']]))

        {

            throw new Exception('post_name isnt defined in $_FILES array');

        }



        if(!isset($params['data_folder']))

        {

            throw new Exception('data_folder isnt defined');

        }

    }



    /**

     *

     */

    private function create_files_folder( $path )

    {

        if(!is_dir($path))

        {

            $oldumask = umask(0);



            if(false === mkdir($path, 0777))

            {

                umask($oldumask);

                throw new Exception('Couldnt create directory: ' . $path);

            }



            umask($oldumask);

        }

    }



    /**

     *

     */

    public function removeFile()

    {

        if(isset($this->path))

        {

            if(file_exists( $this->path . '/' . $this->_file['name'] ))

            {

                if(false === unlink($this->path . '/' . $this->_file['name']))

                {

                    $this->set_error('Error: Couldnt remove file: ' . $this->path . '/' . $this->_file['name']);

                }

            }



            if(file_exists( $this->path . '/thumb-' . $this->_file['name'] ))

            {

                if(false === unlink($this->path . '/thumb-' . $this->_file['name']))

                {

                    $this->set_error('Error: Couldnt remove file: ' . $this->path . '/thumb-' . $this->_file['name']);

                }

            }

        }

    }



    /**

     *

     */

    private function build_thumbnail($path, & $file_info)

    {

        $image = getimagesize ( $path . '/' . $file_info['name'] );



        if(!isset($image[0]) || !isset($image[1]))

        {

            throw new Exception('Couldnt fetch image info: ' . var_export($image,true));

        }



        $file_info['image_width']  = $image[0];

        $file_info['image_height'] = $image[1];



        $newwidth = 140;

        $newheight = (int) ((140 / $image[0]) * $image[1]);



        if(false === ($thumb = imagecreatetruecolor($newwidth, $newheight)))

        {

            throw new Exception('imagecreatetruecolor failed with params: ' . var_export(array($newwidth, $newheight),true));

        }



        switch(strtolower($file_info['type']))

        {

            case 'image/jpeg':

                if(false === ($source = imagecreatefromjpeg($path . '/' . $file_info['name'])))

                {

                    throw new Exception('imagecreatefromjpeg failed with param: ' . var_export($path . '/' . $file_info['name'],true));

                }



                // Resize

                if(false === (imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $image[0], $image[1])))

                {

                    $_params = array($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $image[0], $image[1]);

                    throw new Exception('imagecopyresized failed with params: ' . var_export($_params,true));

                }



                if(false === (imagejpeg($thumb, $path . '/thumb-' . $file_info['name'])))

                {

                    $_params = array($thumb, $path . '/thumb-' . $file_info['name']);

                    throw new Exception('imagejpeg failed with params: ' . var_export($_params,true));

                }



                return;



            case 'image/gif':

                if(false === ($source = imagecreatefromgif($path . '/' . $file_info['name'])))

                {

                    throw new Exception('imagecreatefromgif failed with param: ' . var_export($path . '/' . $file_info['name'],true));

                }



                // Resize

                if(false === (imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $image[0], $image[1])))

                {

                    $_params = array($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $image[0], $image[1]);

                    throw new Exception('imagecopyresized failed with params: ' . var_export($_params,true));

                }



                if(false === (imagegif($thumb, $path . '/thumb-' . $file_info['name'])))

                {

                    $_params = array($thumb, $path . '/thumb-' . $file_info['name']);

                    throw new Exception('imagegif failed with params: ' . var_export($_params,true));

                }



                return;



            case 'image/png':

                if(false === ($source = imagecreatefrompng($path . '/' . $file_info['name'])))

                {

                    throw new Exception('imagecreatefrompng failed with param: ' . var_export($path . '/' . $file_info['name'],true));

                }



                // Resize

                if(false === (imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $image[0], $image[1])))

                {

                    $_params = array($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $image[0], $image[1]);

                    throw new Exception('imagecopyresized failed with params: ' . var_export($_params,true));

                }



                if(false === (imagepng($thumb, $path . '/thumb-' . $file_info['name'])))

                {

                    $_params = array($thumb, $path . '/thumb-' . $file_info['name']);

                    throw new Exception('imagepng failed with params: ' . var_export($_params,true));

                }



                return;

            default:

                    throw new Exception('unknown image type: ' . var_export($file_info,true));

        }

    }

}