Club Drupal

<?php

/**

 * @file

 * File hooks implemented by the File entity module.

 */

/**

 * Implements hook_file_presave().

 */

function file_entity_file_presave($file) {

  // Always ensure the filemime property is current.

  if (!empty($file->original) || empty($file->filemime)) {

    $file->filemime = file_get_mimetype($file->uri);

  }

  // The file type is used as a bundle key, and therefore, must not be NULL.

  // It defaults to FILE_TYPE_NONE when loaded via file_load(), but in case

  // file_save() is called on a new file object, default it here too.

  if (!isset($file->type)) {

    $file->type = FILE_TYPE_NONE;

  }

  // If the file isn't already assigned a real type, determine what type should

  // be assigned to it.

  if ($file->type === FILE_TYPE_NONE) {

    $type = file_get_type($file);

    if (isset($type)) {

      $file->type = $type;

    }

  }

  field_attach_presave('file', $file);

  // Fetch image dimensions.

  file_entity_metadata_fetch_image_dimensions($file);

}

/**

 * Implements hook_file_type().

 */

function file_entity_file_type($file) {

  $types = array();

  foreach (file_type_get_enabled_types() as $type) {

    if (file_entity_match_mimetypes($type->mimetypes, $file->filemime)) {

      $types[] = $type->type;

    }

  }

  return $types;

}

/**

 * Implements hook_file_insert().

 */

function file_entity_file_insert($file) {

  // Ensure field data is saved since file_save() does not in Drupal 7.

  field_attach_insert('file', $file);

  // Save file metadata.

  if (!empty($file->metadata)) {

    foreach ($file->metadata as $name => $value) {

      db_merge('file_metadata')

        ->fields(array(

          'value' => serialize($value),

        ))

        ->key(array(

          'fid' => $file->fid,

          'name' => $name,

        ))

        ->execute();

    }

  }

  // Clear any related field caches.

  file_entity_invalidate_field_caches($file);

}

/**

 * Implements hook_file_update().

 */

function file_entity_file_update($file) {

  // Ensure field data is saved since file_save() does not in Drupal 7.

  field_attach_update('file', $file);

  // Save file metadata.

  if (!empty($file->metadata)) {

    foreach ($file->metadata as $name => $value) {

      db_merge('file_metadata')

        ->fields(array(

          'value' => serialize($value),

        ))

        ->key(array(

          'fid' => $file->fid,

          'name' => $name,

        ))

        ->execute();

    }

  }

  // Save file metadata.

  db_delete('file_metadata')->condition('fid', $file->fid);

  if (!empty($file->metadata)) {

    foreach ($file->metadata as $name => $value) {

      db_merge('file_metadata')

        ->fields(array(

          'value' => serialize($value),

        ))

        ->key(array(

          'fid' => $file->fid,

          'name' => $name,

        ))

        ->execute();

    }

  }

  if (file_entity_file_get_mimetype_type($file) == 'image' && module_exists('image')) {

    // If the image dimensions have changed, update any image field references

    // to this file and flush image style derivatives.

    if ($file->metadata['width'] != $file->metadata['width'] || $file->metadata['height'] != $file->metadata['height']) {

      _file_entity_update_image_field_dimensions($file);

    }

    // Flush image style derivatives whenever an image is updated.

    image_path_flush($file->uri);

  }

  // Clear any related field caches.

  file_entity_invalidate_field_caches($file);

}

/**

 * Implements hook_file_delete().

 */

function file_entity_file_delete($file) {

  field_attach_delete('file', $file);

  // This is safe to call since the file's records from the usage table have

  // not yet been deleted.

  file_entity_invalidate_field_caches($file);

  // Remove file metadata.

  db_delete('file_metadata')->condition('fid', $file->fid)->execute();

  // Remove this file from the search index if needed.

  // This code is implemented in file entity module rather than in search

  // module because file entity is implementing search module's API, not the

  // other way around.

  if (module_exists('search')) {

    search_reindex($file->fid, 'file');

  }

}

/**

 * Implements hook_file_mimetype_mapping_alter().

 */

function file_entity_file_mimetype_mapping_alter(&$mapping) {

  // Add support for mka and mkv.

  // @todo Remove when http://drupal.org/node/1443070 is fixed in core.

  $new_mappings['mka'] = 'audio/x-matroska';

  $new_mappings['mkv'] = 'video/x-matroska';

  // Add support for weba, webm, and webp.

  // @todo Remove when http://drupal.org/node/1443070 is fixed in core.

  $new_mappings['weba'] = 'audio/webm';

  $new_mappings['webm'] = 'video/webm';

  $new_mappings['webp'] = 'image/webp';

  foreach ($new_mappings as $extension => $mime_type) {

    if (!in_array($mime_type, $mapping['mimetypes'])) {

      // If the mime type does not already exist, add it.

      $mapping['mimetypes'][] = $mime_type;

    }

    // Get the index of the mime type and assign the extension to that key.

    $index = array_search($mime_type, $mapping['mimetypes']);

    $mapping['extensions'][$extension] = $index;

  }

}

/**

 * Implements hook_file_load().

 */

function file_entity_file_load($files) {

  $alt = variable_get('file_entity_alt', '[file:field_file_image_alt_text]');

  $title = variable_get('file_entity_title', '[file:field_file_image_title_text]');

  $replace_options = array(

    'clear' => TRUE,

    'sanitize' => FALSE,

  );

  foreach ($files as $file) {

    $file->metadata = array();

    // Load alt and title text from fields.

    if (!empty($alt)) {

      $file->alt = token_replace($alt, array('file' => $file), $replace_options);

    }

    if (!empty($title)) {

      $file->title = token_replace($title, array('file' => $file), $replace_options);

    }

  }

  // Load and unserialize metadata.

  $results = db_query("SELECT * FROM {file_metadata} WHERE fid IN (:fids)", array(':fids' => array_keys($files)));

  foreach ($results as $result) {

    $files[$result->fid]->metadata[$result->name] = unserialize($result->value);

  }

}

/**

 * Fetch the dimensions of an image and store them in the file metadata array.

 */

function file_entity_metadata_fetch_image_dimensions($file) {

  // Prevent PHP notices when trying to read empty files.

  // @see http://drupal.org/node/681042

  if (!$file->filesize) {

    return;

  }

  // Do not bother proceeding if this file does not have an image mime type.

  if (file_entity_file_get_mimetype_type($file) != 'image') {

    return;

  }

  // We have a non-empty image file.

  $image_info = image_get_info($file->uri);

  if ($image_info) {

    $file->metadata['width'] = $image_info['width'];

    $file->metadata['height'] = $image_info['height'];

  }

  else {

    // Fallback to NULL values.

    $file->metadata['width'] = NULL;

    $file->metadata['height'] = NULL;

  }

}

/**

 * Update the image dimensions stored in any image fields for a file.

 *

 * @param object $file

 *   A file object that is an image.

 *

 * @see http://drupal.org/node/1448124

 */

function _file_entity_update_image_field_dimensions($file) {

  // Do not bother proceeding if this file does not have an image mime type.

  if (file_entity_file_get_mimetype_type($file) != 'image') {

    return;

  }

  // Find all image field enabled on the site.

  $image_fields = _file_entity_get_fields_by_type('image');

  foreach ($image_fields as $image_field) {

    $query = new EntityFieldQuery();

    $query->fieldCondition($image_field, 'fid', $file->fid);

    $results = $query->execute();

    foreach ($results as $entity_type => $entities) {

      $entities = entity_load($entity_type, array_keys($entities));

      foreach ($entities as $entity) {

        foreach ($entity->{$image_field} as $langcode => $items) {

          foreach ($items as $delta => $item) {

            if ($item['fid'] == $file->fid) {

              $entity->{$image_field}[$langcode][$delta]['width'] = $file->metadata['width'];

              $entity->{$image_field}[$langcode][$delta]['height'] = $file->metadata['height'];

            }

          }

        }

        // Save the updated field column values.

        _file_entity_entity_fields_update($entity_type, $entity);

      }

    }

  }

}

/**

 * Update an entity's field values without changing anything on the entity.

 */

function _file_entity_entity_fields_update($entity_type, $entity) {

  list($id) = entity_extract_ids($entity_type, $entity);

  if (empty($id)) {

    throw new Exception(t('Cannot call _file_entity_update_entity_fields() on a new entity.'));

  }

  // Some modules use the original property.

  if (!isset($entity->original)) {

    $entity->original = $entity;

  }

  // Ensure that file_field_update() will not trigger additional usage.

  unset($entity->revision);

  // Invoke the field presave and update hooks.

  field_attach_presave($entity_type, $entity);

  field_attach_update($entity_type, $entity);

  // Clear the cache for this entity now.

  entity_get_controller($entity_type)->resetCache(array($id));

}

/**

 * Implements hook_file_metadata_info().

 */

function file_entity_file_metadata_info() {

  $info['width'] = array('label' => t('Width'), 'type' => 'integer');

  $info['height'] = array('label' => t('Height'), 'type' => 'integer');

  return $info;

}