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<?php |
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/** |
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* Mapper for mapping data between raw input and a Height VO |
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* |
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* @link http://github.com/PHPExif/php-exif-native for the canonical source repository |
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* @copyright Copyright (c) 2016 Tom Van Herreweghe <[email protected]> |
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* @license http://github.com/PHPExif/php-exif-native/blob/master/LICENSE MIT License |
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* @category PHPExif |
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* @package Native |
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*/ |
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namespace PHPExif\Adapter\Native\Reader\Mapper\Exif; |
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use PHPExif\Common\Data\ExifInterface; |
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use PHPExif\Common\Data\ValueObject\Coordinates; |
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use PHPExif\Common\Data\ValueObject\DigitalDegrees; |
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use PHPExif\Common\Mapper\FieldMapper; |
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/** |
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* Mapper |
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* |
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* @category PHPExif |
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* @package Native |
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*/ |
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class CoordinatesFieldMapper implements FieldMapper |
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{ |
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use GuardInvalidArgumentsTrait; |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getSupportedFields() |
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{ |
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return array( |
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Coordinates::class, |
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); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function mapField($field, array $input, &$output) |
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{ |
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$this->guardInvalidArguments($field, $input, $output); |
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if (!(array_key_exists('GPSLatitude', $input) && array_key_exists('GPSLongitude', $input))) { |
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return; |
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} |
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$latitude = $this->extractGpsCoordinate($input['GPSLatitude']); |
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$longitude = $this->extractGpsCoordinate($input['GPSLongitude']); |
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$latitudeRef = empty($input['GPSLatitudeRef'][0]) ? 'N' : $input['GPSLatitudeRef'][0]; |
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$longitudeRef = empty($input['GPSLongitudeRef'][0]) ? 'E' : $input['GPSLongitudeRef'][0]; |
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$coordinates = new Coordinates( |
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new DigitalDegrees( |
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round((strtoupper($latitudeRef) === 'S' ? -1 : 1) * $latitude, 6) |
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), |
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new DigitalDegrees( |
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round((strtoupper($longitudeRef) === 'W' ? -1 : 1) * $longitude, 6) |
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) |
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); |
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$output = $output->withCoordinates($coordinates); |
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} |
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/** |
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* Extract & convert GPS coordinate to digital degrees |
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* |
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* @param array $data |
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* |
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* @return float |
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*/ |
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protected function extractGpsCoordinate(array $data) |
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{ |
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// make sure we always have 3 components |
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$default = [0, 0, 0]; |
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$data = array_replace($default, $data); |
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// normalize the components |
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array_walk($data, array($this, 'normalizeCoordinatePartData')); |
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// convert to digital degrees |
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return floatval($data[0]) + floatval($data[1]/60) + floatval($data[2]/3600); |
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} |
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/** |
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* Converts notations like 5610/100 to 56.1 |
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* |
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* @param mixed $data |
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*/ |
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protected function normalizeCoordinatePartData(&$data) |
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{ |
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$parts = explode('/', $data); |
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if (count($parts) == 1) { |
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return $parts[0]; |
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} |
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$data = floatval($parts[0]) / floatval($parts[1]); |
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} |
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} |
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PHPExif /
php-exif-native
