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<?php
/* --------------------------------------------------------------
  ImageProcessingController.inc.php 2017-03-08
  Gambio GmbH
  http://www.gambio.de
  Copyright (c) 2017 Gambio GmbH
  Released under the GNU General Public License (Version 2)
  [http://www.gnu.org/licenses/gpl-2.0.html]
  --------------------------------------------------------------
*/

/**
 * Class ImageProcessingController
 * @extends    AdminHttpViewController
 * @category   System
 * @package    AdminHttpViewControllers
 */
class ImageProcessingController extends AdminHttpViewController
{
    /**
     * @return AdminPageHttpControllerResponse
     */
    public function actionDefault()
    {
        $this->contentView->set_template_dir(DIR_FS_ADMIN . 'html/content/');

        $html = $this->_render('image_processing.html', array(
            'image_options_page_link' => xtc_href_link(FILENAME_CONFIGURATION, 'gID=4', 'NONSSL')
        ));

        $JavaScriptEngineLanguages = array(
            'image_processing'
        );

        return MainFactory::create('AdminPageHttpControllerResponse', 'Image Processing', $html, null, $JavaScriptEngineLanguages);
    }


    /**
     * Runs the image Processing
     *
     * @return RedirectHttpControllerResponse
     */
    public function actionProcess()
    {
        @xtc_set_time_limit(0);
        require_once DIR_FS_CATALOG . 'admin/includes/classes/' . FILENAME_IMAGEMANIPULATOR;
        
        $logger = LogControl::get_instance();
        $imageNumber = (int)$this->_getPostData('image_number');
        $imageFile = $this->_getPostData('image_file');
        $files = $this->_getImageFiles();
        $responseMessage = '';
        $nextImageNumber = 0;
        $fileNotFound = false;
        
        // search for image number if image filename is given
        if($imageFile !== '')
        {
            $counter = -1;
            for($i = 1; $i <= count($files); $i++)
            {
                if($files[$i - 1]['text'] === $imageFile)
                {
                    $counter = $i;
                    break;
                }
            }
            // searching for file failed, if counter is still -1. otherwise set imageNumber to counter
            if($counter === -1)
            {
                $fileNotFound    = true;
                $responseMessage = 'Image "' . $imageFile . '" could not be found.';
                $logger->notice($responseMessage, 'widgets', 'image_processing', 'notice',
                                $p_level_type = 'DEBUG NOTICE', E_USER_NOTICE);
            }
            else
            {
                $imageNumber     = $counter;
                $nextImageNumber = $counter + 1;
            }
        }
        
        // do not rename this variables, because included files need them
        $products_image_name = $files[$imageNumber - 1]['text'];
        $image_error = false;

        $filesCount = count($files);
        
        if(!$fileNotFound)
        {
            if($imageNumber <= $filesCount && $imageNumber > 0)
            {
                include(DIR_WS_INCLUDES . 'product_popup_images.php');
                include(DIR_WS_INCLUDES . 'product_info_images.php');
                include(DIR_WS_INCLUDES . 'product_thumbnail_images.php');
                include(DIR_WS_INCLUDES . 'product_gallery_images.php');
                
                // image processing failed, log the error
                if($image_error)
                {
                    $responseMessage = 'Image ' . $imageNumber . ' "' . $products_image_name
                                       . '" could not be processed.';
                    $logger->notice($responseMessage, 'widgets', 'image_processing', 'notice',
                                    $p_level_type = 'DEBUG NOTICE', E_USER_NOTICE);
                }
                elseif($imageNumber === $filesCount)
                {
                    $logger->notice('Image processing DONE', 'widgets', 'image_processing', 'notice',
                                    $p_level_type = 'DEBUG NOTICE', E_USER_NOTICE);
                }
                
                $finished = $imageNumber === $filesCount;
            }
            else
            {
                $finished = true;
            }
        }
        else
        {
            $finished    = true;
            $image_error = true;
        }
        
        $payload = array(
            'imagesCount'  => $filesCount,
            'finished'     => $finished,
            'imageName'    => $products_image_name,
            'nextImageNr'  => $nextImageNumber,
            'fileNotFound' => $fileNotFound
        );
        
        $response = array('success' => !$image_error, 'msg' => $responseMessage, 'payload' => $payload);

        return MainFactory::create('JsonHttpControllerResponse', $response);
    }

    
    /**
     * @return array
     */
    protected function _getImageFiles()
    {
        $files = array();

        if($dir = opendir(DIR_FS_CATALOG_ORIGINAL_IMAGES))
        {
            $i = 0;

            while($file = readdir($dir))
            {
                if(is_file(DIR_FS_CATALOG_ORIGINAL_IMAGES . $file)
                   && (strrpos(strtolower($file), '.jpg') !== false
                       || strrpos(strtolower($file), '.jpeg') !== false
                       || strrpos(strtolower($file), '.gif') !== false
                       || strrpos(strtolower($file), '.png') !== false)
                )
                {
                    $files[] = array(
                        'id'   => $file,
                        'text' => $file,
                        'nr'   => $i++
                    );
                }
            }
            closedir($dir);

            array_multisort($files);
        }

        return $files;
    }
}