File.php in Geocoder 8.2

Namespace

Drupal\geocoder\Geocoder\Provider

File

src/Geocoder/Provider/File.php

<?php

namespace Drupal\geocoder\Geocoder\Provider;

use Geocoder\Exception\NoResult;
use Geocoder\Exception\UnsupportedOperation;
use Geocoder\Provider\AbstractProvider;
use Geocoder\Provider\Provider;

/**
 * Provides a file handler to be used by 'file' plugin.
 */
class File extends AbstractProvider implements Provider {

  /**
   * {@inheritdoc}
   */
  public function getName() {
    return 'file';
  }

  /**
   * {@inheritdoc}
   */
  public function geocode($filename) {

    // Check file type exists and is a JPG (IMAGETYPE_JPEG) before exif_read.
    if (file_exists($filename) && exif_imagetype($filename) == 2 && ($exif = @exif_read_data($filename))) {
      if (isset($exif['GPSLatitude']) && isset($exif['GPSLatitudeRef']) && $exif['GPSLongitude'] && $exif['GPSLongitudeRef']) {
        $latitude = $this
          ->getGpsExif($exif['GPSLatitude'], $exif['GPSLatitudeRef']);
        $longitude = $this
          ->getGpsExif($exif['GPSLongitude'], $exif['GPSLongitudeRef']);
        return $this
          ->returnResults([
          [
            'latitude' => $latitude,
            'longitude' => $longitude,
          ] + $this
            ->getDefaults(),
        ]);
      }
    }
    throw new NoResult(sprintf('Could not find geo data in file: "%s".', basename($filename)));
  }

  /**
   * Retrieves the latitude and longitude from exif data.
   *
   * @param string $coordinate
   *   The coordinate.
   * @param string $hemisphere
   *   The hemisphere.
   *
   * @return float
   *   Return value based on coordinate and Hemisphere.
   */
  protected function getGpsExif($coordinate, $hemisphere) {
    for ($i = 0; $i < 3; $i++) {
      $part = explode('/', $coordinate[$i]);
      if (count($part) == 1) {
        $coordinate[$i] = $part[0];
      }
      elseif (count($part) == 2) {
        $coordinate[$i] = floatval($part[0]) / floatval($part[1]);
      }
      else {
        $coordinate[$i] = 0;
      }
    }
    list($degrees, $minutes, $seconds) = $coordinate;
    $sign = $hemisphere == 'W' || $hemisphere == 'S' ? -1 : 1;
    $value = $sign * ($degrees + $minutes / 60 + $seconds / 3600);
    return $value;
  }

  /**
   * {@inheritdoc}
   */
  public function reverse($latitude, $longitude) {
    throw new UnsupportedOperation('The File plugin is not able to do reverse geocoding.');
  }

}

Classes

Name	Description
File	Provides a file handler to be used by 'file' plugin.