/<?php
// ***********************************************************************************
// *                                                                                 *
// * Nifty iOS Image Fixer                                                           *
// *                                                                                 *
// ***********************************************************************************
// *                                                                                 *
// * @package    plg_content_nifty_iosimagefixer                                     *
// * @author     In2 Computing Ltd. <support@in2computing.com>                       *
// * @copyright  Copyright (c) 2017 In2 Computing Ltd. All Rights Reserved.          *
// * @license    GNU General Public Licence http://www.gnu.org/licenses/gpl-3.0.html *
// * @website    https://in2computing.com/                                           *
// * @link       https://in2computing.com/nifty-products/ios-image-fixer             *
// * @version    1.0.0                                                               *
// *                                                                                 *
// ***********************************************************************************
defined('_JEXEC') or die;

/**
 * Nifty iOS Images Fixer content editing Plugin
 *
 * @package     Joomla.Plugin
 * @subpackage  Content.Nifty_iosimagefixer
 */
  
jimport('joomla.filesystem.file');
 
class PlgContentNifty_iosimagefixer extends JPlugin
{
    public function onContentAfterSave($context, $object_file, $isNew)
    {
        if($context === 'com_media.file' && $isNew)
		{
			if(!JFile::exists($object_file->filepath))
			{
				$this->LogError('onContentBeforeSave: File not found.');
				return true;
			}
			
			return $this->fixImageRotation($object_file->filepath);
		}
		
        return true;
    }
	
	protected function fixImageRotation($file)
	{
		try
		{
			// new JImage object from image path
			$image = new JImage($file);

			// Read the exif data from the image
			$exif = exif_read_data($file);
			$rotate = 0;

			// Get the angle to rotate the image based on the orientation
			if (!empty($exif['Orientation']))
			{
				// Based on the orientation of time image, assign the rotation angle.
				switch ($exif['Orientation'])
				{
					case 3:
						$rotate = 180;
						break;
					case 6:
						$rotate = -90;
						break;
					case 8:
						$rotate = 90;
						break;
				}

				// Rotate the image appropriately
				$newImage = $image->rotate($rotate);
				
				// Overwrite the old image with new image
				if (!$newImage->toFile($file))
				{
					$this->LogError("Unable to overwrite '" . $file . "'");
					return false;
				}
			}
			else
			{
				// No exif data found.
				return true;
			}
		}
		catch(exception $ex)
		{
			$this->LogError($ex->getMessage());
			return false;
		}
	}
	
	protected function LogError($msg)
	{
		// Include the JLog class.
		jimport('joomla.log.log');
		
		// Initialise a basic logger with no options (once only).
		JLog::addLogger(array());
		
		// Log the error.
		JLog::add('plg_content_nifty_iosimagefixer->nifty_iosimagefixer.php: ' . $msg, JLog::ERROR);
	}
}