crop.module::crop_file_url_alter()

Complexity

Conditions	13
Paths	24

Size

Total Lines	60
Code Lines	25

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
function crop_file_url_alter(&$uri) {
  // Process only files that are stored in "styles" directory.
  if (strpos($uri, '/styles/') !== FALSE && preg_match('/\/styles\/(.*?)\/(.*?)\/(.+)/', $uri, $match)) {
    // Match image style, schema, file subdirectory and file name.
    // Get the image style ID.
    $image_style = $match[1];
    // Get the file path without query parameter.
    $parsed_uri = UrlHelper::parse($match[3]);
    // Get the file URI using parsed schema and file path.
    $file_uri = $match[2] . '://' . $parsed_uri['path'];

    // Prevent double hashing, if there is a hash argument already, do not add
    // it again.
    if (!empty($parsed_uri['query']['h'])) {
      return;
    }

    /** @var \Drupal\image\Entity\ImageStyle $image_style */
    if (!$image_style = ImageStyle::load($image_style)) {
      return;
    }

    $crop_type = NULL;
    // Find whether matched image style uses "crop_type" effect.
    /* @var  \Drupal\image\ImageEffectInterface $effect */
    foreach ($image_style->getEffects() as $uuid => $effect) {
      $data_effect = $image_style->getEffect($uuid)->getConfiguration()['data'];
      if (isset($data_effect['crop_type'])) {
        $crop_type = $data_effect['crop_type'];
        break;
      }
    }

    // In case the image style uses "crop_type" effect, load the crop entity.
    if ($crop_type && $crop = Crop::findCrop($file_uri, $crop_type)) {
      // Found a crop for this image, append a hash of it to the URL,
      // so that browsers reload the image and CDNs and proxies can be bypassed.
      $shortened_hash = substr(md5(implode($crop->position()) . implode($crop->anchor())), 0, 8);

      // If the URI has a schema and that is not http, https or data, convert
      // the URI to the external URL. Otherwise the appended query argument
      // will be encoded.
      // @see file_create_url()
      $scheme = \Drupal::service('file_system')->uriScheme($uri);
      if ($scheme && !in_array($scheme, ['http', 'https', 'data'])) {
        if ($wrapper = \Drupal::service('stream_wrapper_manager')->getViaUri($uri)) {
          $uri = $wrapper->getExternalUrl();
        }
      }

      // Append either with a ? or a & if there are existing query arguments.
      if (strpos($uri, '?') === FALSE) {
        $uri .= '?h=' . $shortened_hash;
      }
      else {
        $uri .= '&h=' . $shortened_hash;
      }
    }
  }
}