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<?php 
/**
* Class Image upload
*/
class Upload {

	private $output_folder;
	private $input_file;
	private $input_img;
	private $src_img;
	private $file_name; // basename($file['name'][0]);
	private $max_file_size; // 2097152;
	private $file_size; // filesize($file['tmp_name'][0]);
	private $authorized_extensions;
	private $file_extension; // strrchr($file['name'][0], '.');
	
	function __construct() {
		
		if ( !isset($output_folder) || empty($output_folder) )
			throw new Exception("Error Processing Request : output folder not specified.", 1);			
		else {
			$this->output_folder = $folder;
			$this->max_file_size = parse_size(ini_get('post_max_size'));
			$this->file_extensions = array(
				'.png',
				'.gif',
				'.jpg',
				'.jpeg'
			);
		}
	}

	/**
	 * Search and replace non authorized characters in filename
	 */
	private static sanitize_filename($file_name) {
		$file_name = strtr($file_name,
			'ÀÁÂÃÄÅÇÈÉÊËÌÍÎÏÒÓÔÕÖÙÚÛÜÝàáâãäåçèéêëìíîïðòóôõöùúûüýÿ',
			'AAAAAACEEEEIIIIOOOOOUUUUYaaaaaaceeeeiiiioooooouuuuyy');
		$file_name = preg_replace('/([^.a-z0-9]+)/i', '-', $file_name)
		return $filename;
	}

	/**
	 * Check before upload
	 */
	public static function check_file($file) {

		if( !isset($file) || empty($file) ) {
			throw new Exception("Error Processing Request : file not found or empty.", 1);
		}
		else {
			$this->file_name = basename($file['photo']['name'][0]);
			$this->file_size = filesize($file['photo']['tmp_name'][0]);
			$this->file_extension = strrchr($file['photo']['name'][0], '.');

			//vérifications de sécurité
			if(!in_array($this->file_extension, $this->file_extensions)) {
				throw new Exception("Error Processing Request : file not of type png, gif, jpg nor jpeg", 1);
			}
			if($this->file_size > $this->max_file_size)	{
				throw new Exception("Error Processing Request : file of size $this->file_size. Max filesize is $this->max_file_size.", 1);
			}
			else {
				$this->file_name = self::sanitize_filename($this->file_name);
			}
		}
		return $file;
	}

	/**
	 * Upload the file
	 */
	public function upload_file ($file) {

		$this->input_file = self::check_file($file);
				
				if( !move_uploaded_file($this->file_name, $this->output_folder .  $this->file_name) ) {
					throw new Exception("Error Processing Request : invalid filename or destination folder.", 1);
				}
				else {
					$this->input_img = $this->output_folder . $this->file_name;
					$sizes = getimagesize($this->input_img);
					$thumb_width = '110';
					$thumb_height = (int)($thumb_width/$sizes[0]*$sizes[1]);
					$thumb = imagecreatetruecolor($thumb_width, $thumb_height);

					switch ($this->input_file_extension) {
						case '.jpeg':
							$this->src_img = imagecreatefromjpeg($this->input_img);
							imagecopyresampled($thumb, $this->src_img, 0, 0, 0, 0, $thumb_width, $thumb_height, $sizes[0], $sizes[1]);
							imagejpeg($thumb, '../img/photos/thumbs/'.$this->file_name.'');
							imagedestroy($thumb);
							break;
						case '.jpg':
							$this->src_img = imagecreatefromjpeg($this->input_img);
							imagecopyresampled($thumb, $this->src_img, 0, 0, 0, 0, $thumb_width, $thumb_height, $sizes[0], $sizes[1]);
							imagejpeg($thumb, '../img/photos/thumbs/'.$this->file_name.'');
							imagedestroy($thumb);
							break;
						case '.png':
							$this->src_img = imagecreatefrompng($this->input_img);
							imagecopyresampled($thumb, $this->src_img, 0, 0, 0, 0, $thumb_width, $thumb_height, $sizes[0], $sizes[1]);
							imagepng($thumb, '../img/photos/thumbs/'.$this->file_name.'');
							imagedestroy($thumb);
							break;
						case '.gif':
							$this->src_img = imagecreatefromgif($this->input_img);
							imagecopyresampled($thumb, $this->src_img, 0, 0, 0, 0, $thumb_width, $thumb_height, $sizes[0], $sizes[1]);
							imagegif($thumb, '../img/photos/thumbs/'.$this->file_name.'');
							imagedestroy($thumb);
							break;
					}
					echo $this->file_name.' successfully uploaded !';
				}
			}
		}
	}
}
?>