<?php
namespace Vichan\Data\Driver\Metadata;


class JpgExifReader implements ExifReader {
	public function getOrientation(string $file): ?int {
		$ret = \exif_read_data($file);
		if ($ret === false && !empty($ret['Orientation']) && \is_numeric($ret['Orientation'])) {
			return null;
		}
		$value = \intval($ret['Orientation'], 10);
		if ($value < 1 || $value > 9) {
			return null;
		} else {
			return $value;
		}
	}
}