protected function Exif::doGetMetadataFromFile in File metadata manager 8

Same name and namespace in other branches

1. 8.2 file_mdm_exif/src/Plugin/FileMetadata/Exif.php \Drupal\file_mdm_exif\Plugin\FileMetadata\Exif::doGetMetadataFromFile()

Gets file metadata from the file at URI/local path.

Return value

mixed The metadata retrieved from the file.

Throws

\Drupal\file_mdm\FileMetadataException In case there were significant errors reading from file.

Overrides FileMetadataPluginBase::doGetMetadataFromFile

File

file_mdm_exif/src/Plugin/FileMetadata/Exif.php, line 125

Class

Exif

FileMetadata plugin for EXIF.

Namespace

Drupal\file_mdm_exif\Plugin\FileMetadata

Code

protected function doGetMetadataFromFile() {

  // Get the file as a PelJpeg or PelTiff object.
  $file = $this
    ->getFile();
  if (!$file) {
    return [];
  }

  // Get the TIFF section if existing, or return if not.
  if ($file instanceof PelJpeg) {
    $exif = $file
      ->getExif();
    if ($exif === NULL) {
      return [];
    }
    $tiff = $exif
      ->getTiff();
    if ($tiff === NULL) {
      return [];
    }
  }
  elseif ($file instanceof PelTiff) {
    $tiff = $file;
  }

  // Scans metadata for entries of supported tags.
  $metadata = [];
  $keys = $this->tagMapper
    ->getSupportedKeys();
  foreach ($keys as $key) {
    $ifd_tag = $this->tagMapper
      ->resolveKeyToIfdAndTag($key);
    if ($entry = $this
      ->getEntry($tiff, $ifd_tag['ifd'], $ifd_tag['tag'])) {
      $metadata[$ifd_tag['ifd']][$ifd_tag['tag']] = $entry;
    }
  }
  return $metadata;
}