' . t('About') . '';
$output .= '' . t('The File module allows you to create fields that contain files. See the Field module help and the Field UI help pages for general information on fields and how to create and manage them. For more information, see the online documentation for the File module.', [':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':file_documentation' => 'https://www.drupal.org/documentation/modules/file']) . '
';
$output .= '' . t('Uses') . '
';
$output .= '';
$output .= '- ' . t('Managing and displaying file fields') . '
';
$output .= '- ' . t('The settings and the display of the file field can be configured separately. See the Field UI help for more information on how to manage fields and their display.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '
';
$output .= '- ' . t('Allowing file extensions') . '
';
$output .= '- ' . t('In the field settings, you can define the allowed file extensions (for example pdf docx psd) for the files that will be uploaded with the file field.') . '
';
$output .= '- ' . t('Storing files') . '
';
$output .= '- ' . t('Uploaded files can either be stored as public or private, depending on the File system settings. For more information, see the System module help page.', [':file-system' => \Drupal::url('system.file_system_settings'), ':system-help' => \Drupal::url('help.page', ['name' => 'system'])]) . '
';
$output .= '- ' . t('Restricting the maximum file size') . '
';
$output .= '- ' . t('The maximum file size that users can upload is limited by PHP settings of the server, but you can restrict by entering the desired value as the Maximum upload size setting. The maximum file size is automatically displayed to users in the help text of the file field.') . '
';
$output .= '- ' . t('Displaying files and descriptions') . '
- ';
$output .= '
- ' . t('In the field settings, you can allow users to toggle whether individual files are displayed. In the display settings, you can then choose one of the following formats:
- Generic file displays links to the files and adds icons that symbolize the file extensions. If descriptions are enabled and have been submitted, then the description is displayed instead of the file name.
- URL to file displays the full path to the file as plain text.
- Table of files lists links to the files and the file sizes in a table.
- RSS enclosure only displays the first file, and only in a RSS feed, formatted according to the RSS 2.0 syntax for enclosures.
A file can still be linked to directly by its URI even if it is not displayed.') . ' ';
$output .= '
';
return $output;
}
}
/**
* Loads file entities from the database.
*
* @param array|null $fids
* (optional) An array of entity IDs. If omitted or NULL, all entities are
* loaded.
* @param bool $reset
* (optional) Whether to reset the internal file_load_multiple() cache.
* Defaults to FALSE.
*
* @return array
* An array of file entities, indexed by fid.
*
* @deprecated in Drupal 8.x, will be removed before Drupal 9.0.
* Use \Drupal\file\Entity\File::loadMultiple().
*
* @see hook_ENTITY_TYPE_load()
* @see file_load()
* @see entity_load()
* @see \Drupal\Core\Entity\Query\EntityQueryInterface
*/
function file_load_multiple(array $fids = NULL, $reset = FALSE) {
if ($reset) {
\Drupal::entityManager()->getStorage('file')->resetCache($fids);
}
return File::loadMultiple($fids);
}
/**
* Loads a single file entity from the database.
*
* @param int $fid
* A file ID.
* @param bool $reset
* (optional) Whether to reset the internal file_load_multiple() cache.
* Defaults to FALSE.
*
* @return \Drupal\file\FileInterface|null
* A file entity or NULL if the file was not found.
*
* @deprecated in Drupal 8.x, will be removed before Drupal 9.0.
* Use \Drupal\file\Entity\File::load().
*
* @see hook_ENTITY_TYPE_load()
* @see file_load_multiple()
*/
function file_load($fid, $reset = FALSE) {
if ($reset) {
\Drupal::entityManager()->getStorage('file')->resetCache([$fid]);
}
return File::load($fid);
}
/**
* Copies a file to a new location and adds a file record to the database.
*
* This function should be used when manipulating files that have records
* stored in the database. This is a powerful function that in many ways
* performs like an advanced version of copy().
* - Checks if $source and $destination are valid and readable/writable.
* - If file already exists in $destination either the call will error out,
* replace the file or rename the file based on the $replace parameter.
* - If the $source and $destination are equal, the behavior depends on the
* $replace parameter. FILE_EXISTS_REPLACE will error out. FILE_EXISTS_RENAME
* will rename the file until the $destination is unique.
* - Adds the new file to the files database. If the source file is a
* temporary file, the resulting file will also be a temporary file. See
* file_save_upload() for details on temporary files.
*
* @param \Drupal\file\FileInterface $source
* A file entity.
* @param string $destination
* A string containing the destination that $source should be
* copied to. This must be a stream wrapper URI.
* @param int $replace
* (optional) Replace behavior when the destination file already exists.
* Possible values include:
* - FILE_EXISTS_REPLACE: Replace the existing file. If a managed file with
* the destination name exists, then its database entry will be updated. If
* no database entry is found, then a new one will be created.
* - FILE_EXISTS_RENAME: (default) Append _{incrementing number} until the
* filename is unique.
* - FILE_EXISTS_ERROR: Do nothing and return FALSE.
*
* @return \Drupal\file\FileInterface|false
* File entity if the copy is successful, or FALSE in the event of an error.
*
* @see file_unmanaged_copy()
* @see hook_file_copy()
*/
function file_copy(FileInterface $source, $destination = NULL, $replace = FILE_EXISTS_RENAME) {
if (!file_valid_uri($destination)) {
if (($realpath = drupal_realpath($source->getFileUri())) !== FALSE) {
\Drupal::logger('file')->notice('File %file (%realpath) could not be copied because the destination %destination is invalid. This is often caused by improper use of file_copy() or a missing stream wrapper.', ['%file' => $source->getFileUri(), '%realpath' => $realpath, '%destination' => $destination]);
}
else {
\Drupal::logger('file')->notice('File %file could not be copied because the destination %destination is invalid. This is often caused by improper use of file_copy() or a missing stream wrapper.', ['%file' => $source->getFileUri(), '%destination' => $destination]);
}
drupal_set_message(t('The specified file %file could not be copied because the destination is invalid. More information is available in the system log.', ['%file' => $source->getFileUri()]), 'error');
return FALSE;
}
if ($uri = file_unmanaged_copy($source->getFileUri(), $destination, $replace)) {
$file = $source->createDuplicate();
$file->setFileUri($uri);
$file->setFilename(drupal_basename($uri));
// If we are replacing an existing file re-use its database record.
// @todo Do not create a new entity in order to update it. See
// https://www.drupal.org/node/2241865.
if ($replace == FILE_EXISTS_REPLACE) {
$existing_files = entity_load_multiple_by_properties('file', ['uri' => $uri]);
if (count($existing_files)) {
$existing = reset($existing_files);
$file->fid = $existing->id();
$file->setOriginalId($existing->id());
$file->setFilename($existing->getFilename());
}
}
// If we are renaming around an existing file (rather than a directory),
// use its basename for the filename.
elseif ($replace == FILE_EXISTS_RENAME && is_file($destination)) {
$file->setFilename(drupal_basename($destination));
}
$file->save();
// Inform modules that the file has been copied.
\Drupal::moduleHandler()->invokeAll('file_copy', [$file, $source]);
return $file;
}
return FALSE;
}
/**
* Moves a file to a new location and update the file's database entry.
*
* - Checks if $source and $destination are valid and readable/writable.
* - Performs a file move if $source is not equal to $destination.
* - If file already exists in $destination either the call will error out,
* replace the file or rename the file based on the $replace parameter.
* - Adds the new file to the files database.
*
* @param \Drupal\file\FileInterface $source
* A file entity.
* @param string $destination
* A string containing the destination that $source should be moved
* to. This must be a stream wrapper URI.
* @param int $replace
* (optional) The replace behavior when the destination file already exists.
* Possible values include:
* - FILE_EXISTS_REPLACE: Replace the existing file. If a managed file with
* the destination name exists then its database entry will be updated and
* $source->delete() called after invoking hook_file_move(). If no database
* entry is found, then the source files record will be updated.
* - FILE_EXISTS_RENAME: (default) Append _{incrementing number} until the
* filename is unique.
* - FILE_EXISTS_ERROR: Do nothing and return FALSE.
*
* @return \Drupal\file\FileInterface|false
* Resulting file entity for success, or FALSE in the event of an error.
*
* @see file_unmanaged_move()
* @see hook_file_move()
*/
function file_move(FileInterface $source, $destination = NULL, $replace = FILE_EXISTS_RENAME) {
if (!file_valid_uri($destination)) {
if (($realpath = drupal_realpath($source->getFileUri())) !== FALSE) {
\Drupal::logger('file')->notice('File %file (%realpath) could not be moved because the destination %destination is invalid. This may be caused by improper use of file_move() or a missing stream wrapper.', ['%file' => $source->getFileUri(), '%realpath' => $realpath, '%destination' => $destination]);
}
else {
\Drupal::logger('file')->notice('File %file could not be moved because the destination %destination is invalid. This may be caused by improper use of file_move() or a missing stream wrapper.', ['%file' => $source->getFileUri(), '%destination' => $destination]);
}
drupal_set_message(t('The specified file %file could not be moved because the destination is invalid. More information is available in the system log.', ['%file' => $source->getFileUri()]), 'error');
return FALSE;
}
if ($uri = file_unmanaged_move($source->getFileUri(), $destination, $replace)) {
$delete_source = FALSE;
$file = clone $source;
$file->setFileUri($uri);
// If we are replacing an existing file re-use its database record.
if ($replace == FILE_EXISTS_REPLACE) {
$existing_files = entity_load_multiple_by_properties('file', ['uri' => $uri]);
if (count($existing_files)) {
$existing = reset($existing_files);
$delete_source = TRUE;
$file->fid = $existing->id();
$file->uuid = $existing->uuid();
}
}
// If we are renaming around an existing file (rather than a directory),
// use its basename for the filename.
elseif ($replace == FILE_EXISTS_RENAME && is_file($destination)) {
$file->setFilename(drupal_basename($destination));
}
$file->save();
// Inform modules that the file has been moved.
\Drupal::moduleHandler()->invokeAll('file_move', [$file, $source]);
// Delete the original if it's not in use elsewhere.
if ($delete_source && !\Drupal::service('file.usage')->listUsage($source)) {
$source->delete();
}
return $file;
}
return FALSE;
}
/**
* Checks that a file meets the criteria specified by the validators.
*
* After executing the validator callbacks specified hook_file_validate() will
* also be called to allow other modules to report errors about the file.
*
* @param \Drupal\file\FileInterface $file
* A file entity.
* @param array $validators
* (optional) An associative array of callback functions used to validate
* the file. The keys are function names and the values arrays of callback
* parameters which will be passed in after the file entity. The functions
* should return an array of error messages; an empty array indicates that
* the file passed validation. The callback functions will be called in the
* order specified in the array, then the hook hook_file_validate()
* will be invoked so other modules can validate the new file.
*
* @return array
* An array containing validation error messages.
*
* @see hook_file_validate()
*/
function file_validate(FileInterface $file, $validators = []) {
// Call the validation functions specified by this function's caller.
$errors = [];
foreach ($validators as $function => $args) {
if (function_exists($function)) {
array_unshift($args, $file);
$errors = array_merge($errors, call_user_func_array($function, $args));
}
}
// Let other modules perform validation on the new file.
return array_merge($errors, \Drupal::moduleHandler()->invokeAll('file_validate', [$file]));
}
/**
* Checks for files with names longer than can be stored in the database.
*
* @param \Drupal\file\FileInterface $file
* A file entity.
*
* @return array
* An empty array if the file name length is smaller than the limit or an
* array containing an error message if it's not or is empty.
*/
function file_validate_name_length(FileInterface $file) {
$errors = [];
if (!$file->getFilename()) {
$errors[] = t("The file's name is empty. Please give a name to the file.");
}
if (strlen($file->getFilename()) > 240) {
$errors[] = t("The file's name exceeds the 240 characters limit. Please rename the file and try again.");
}
return $errors;
}
/**
* Checks that the filename ends with an allowed extension.
*
* @param \Drupal\file\FileInterface $file
* A file entity.
* @param string $extensions
* A string with a space separated list of allowed extensions.
*
* @return array
* An empty array if the file extension is allowed or an array containing an
* error message if it's not.
*
* @see hook_file_validate()
*/
function file_validate_extensions(FileInterface $file, $extensions) {
$errors = [];
$regex = '/\.(' . preg_replace('/ +/', '|', preg_quote($extensions)) . ')$/i';
if (!preg_match($regex, $file->getFilename())) {
$errors[] = t('Only files with the following extensions are allowed: %files-allowed.', ['%files-allowed' => $extensions]);
}
return $errors;
}
/**
* Checks that the file's size is below certain limits.
*
* @param \Drupal\file\FileInterface $file
* A file entity.
* @param int $file_limit
* (optional) The maximum file size in bytes. Zero (the default) indicates
* that no limit should be enforced.
* @param int $user_limit
* (optional) The maximum number of bytes the user is allowed. Zero (the
* default) indicates that no limit should be enforced.
*
* @return array
* An empty array if the file size is below limits or an array containing an
* error message if it's not.
*
* @see hook_file_validate()
*/
function file_validate_size(FileInterface $file, $file_limit = 0, $user_limit = 0) {
$user = \Drupal::currentUser();
$errors = [];
if ($file_limit && $file->getSize() > $file_limit) {
$errors[] = t('The file is %filesize exceeding the maximum file size of %maxsize.', ['%filesize' => format_size($file->getSize()), '%maxsize' => format_size($file_limit)]);
}
// Save a query by only calling spaceUsed() when a limit is provided.
if ($user_limit && (\Drupal::entityManager()->getStorage('file')->spaceUsed($user->id()) + $file->getSize()) > $user_limit) {
$errors[] = t('The file is %filesize which would exceed your disk quota of %quota.', ['%filesize' => format_size($file->getSize()), '%quota' => format_size($user_limit)]);
}
return $errors;
}
/**
* Checks that the file is recognized as a valid image.
*
* @param \Drupal\file\FileInterface $file
* A file entity.
*
* @return array
* An empty array if the file is a valid image or an array containing an error
* message if it's not.
*
* @see hook_file_validate()
*/
function file_validate_is_image(FileInterface $file) {
$errors = [];
$image_factory = \Drupal::service('image.factory');
$image = $image_factory->get($file->getFileUri());
if (!$image->isValid()) {
$supported_extensions = $image_factory->getSupportedExtensions();
$errors[] = t('Image type not supported. Allowed types: %types', ['%types' => implode(' ', $supported_extensions)]);
}
return $errors;
}
/**
* Verifies that image dimensions are within the specified maximum and minimum.
*
* Non-image files will be ignored. If an image toolkit is available the image
* will be scaled to fit within the desired maximum dimensions.
*
* @param \Drupal\file\FileInterface $file
* A file entity. This function may resize the file affecting its size.
* @param string|int $maximum_dimensions
* (optional) A string in the form WIDTHxHEIGHT; for example, '640x480' or
* '85x85'. If an image toolkit is installed, the image will be resized down
* to these dimensions. A value of zero (the default) indicates no restriction
* on size, so no resizing will be attempted.
* @param string|int $minimum_dimensions
* (optional) A string in the form WIDTHxHEIGHT. This will check that the
* image meets a minimum size. A value of zero (the default) indicates that
* there is no restriction on size.
*
* @return array
* An empty array if the file meets the specified dimensions, was resized
* successfully to meet those requirements or is not an image. If the image
* does not meet the requirements or an attempt to resize it fails, an array
* containing the error message will be returned.
*
* @see hook_file_validate()
*/
function file_validate_image_resolution(FileInterface $file, $maximum_dimensions = 0, $minimum_dimensions = 0) {
$errors = [];
// Check first that the file is an image.
$image_factory = \Drupal::service('image.factory');
$image = $image_factory->get($file->getFileUri());
if ($image->isValid()) {
if ($maximum_dimensions) {
// Check that it is smaller than the given dimensions.
list($width, $height) = explode('x', $maximum_dimensions);
if ($image->getWidth() > $width || $image->getHeight() > $height) {
// Try to resize the image to fit the dimensions.
if ($image->scale($width, $height)) {
$image->save();
if (!empty($width) && !empty($height)) {
$message = t('The image was resized to fit within the maximum allowed dimensions of %dimensions pixels.', ['%dimensions' => $maximum_dimensions]);
}
elseif (empty($width)) {
$message = t('The image was resized to fit within the maximum allowed height of %height pixels.', ['%height' => $height]);
}
elseif (empty($height)) {
$message = t('The image was resized to fit within the maximum allowed width of %width pixels.', ['%width' => $width]);
}
drupal_set_message($message);
}
else {
$errors[] = t('The image exceeds the maximum allowed dimensions and an attempt to resize it failed.');
}
}
}
if ($minimum_dimensions) {
// Check that it is larger than the given dimensions.
list($width, $height) = explode('x', $minimum_dimensions);
if ($image->getWidth() < $width || $image->getHeight() < $height) {
$errors[] = t('The image is too small; the minimum dimensions are %dimensions pixels.', ['%dimensions' => $minimum_dimensions]);
}
}
}
return $errors;
}
/**
* Saves a file to the specified destination and creates a database entry.
*
* @param string $data
* A string containing the contents of the file.
* @param string|null $destination
* (optional) A string containing the destination URI. This must be a stream
* wrapper URI. If no value or NULL is provided, a randomized name will be
* generated and the file will be saved using Drupal's default files scheme,
* usually "public://".
* @param int $replace
* (optional) The replace behavior when the destination file already exists.
* Possible values include:
* - FILE_EXISTS_REPLACE: Replace the existing file. If a managed file with
* the destination name exists, then its database entry will be updated. If
* no database entry is found, then a new one will be created.
* - FILE_EXISTS_RENAME: (default) Append _{incrementing number} until the
* filename is unique.
* - FILE_EXISTS_ERROR: Do nothing and return FALSE.
*
* @return \Drupal\file\FileInterface|false
* A file entity, or FALSE on error.
*
* @see file_unmanaged_save_data()
*/
function file_save_data($data, $destination = NULL, $replace = FILE_EXISTS_RENAME) {
$user = \Drupal::currentUser();
if (empty($destination)) {
$destination = file_default_scheme() . '://';
}
if (!file_valid_uri($destination)) {
\Drupal::logger('file')->notice('The data could not be saved because the destination %destination is invalid. This may be caused by improper use of file_save_data() or a missing stream wrapper.', ['%destination' => $destination]);
drupal_set_message(t('The data could not be saved because the destination is invalid. More information is available in the system log.'), 'error');
return FALSE;
}
if ($uri = file_unmanaged_save_data($data, $destination, $replace)) {
// Create a file entity.
$file = File::create([
'uri' => $uri,
'uid' => $user->id(),
'status' => FILE_STATUS_PERMANENT,
]);
// If we are replacing an existing file re-use its database record.
// @todo Do not create a new entity in order to update it. See
// https://www.drupal.org/node/2241865.
if ($replace == FILE_EXISTS_REPLACE) {
$existing_files = entity_load_multiple_by_properties('file', ['uri' => $uri]);
if (count($existing_files)) {
$existing = reset($existing_files);
$file->fid = $existing->id();
$file->setOriginalId($existing->id());
$file->setFilename($existing->getFilename());
}
}
// If we are renaming around an existing file (rather than a directory),
// use its basename for the filename.
elseif ($replace == FILE_EXISTS_RENAME && is_file($destination)) {
$file->setFilename(drupal_basename($destination));
}
$file->save();
return $file;
}
return FALSE;
}
/**
* Examines a file entity and returns appropriate content headers for download.
*
* @param \Drupal\file\FileInterface $file
* A file entity.
*
* @return array
* An associative array of headers, as expected by
* \Symfony\Component\HttpFoundation\StreamedResponse.
*/
function file_get_content_headers(FileInterface $file) {
$type = Unicode::mimeHeaderEncode($file->getMimeType());
return [
'Content-Type' => $type,
'Content-Length' => $file->getSize(),
'Cache-Control' => 'private',
];
}
/**
* Implements hook_theme().
*/
function file_theme() {
return [
// From file.module.
'file_link' => [
'variables' => ['file' => NULL, 'description' => NULL, 'attributes' => []],
],
'file_managed_file' => [
'render element' => 'element',
],
// From file.field.inc.
'file_widget_multiple' => [
'render element' => 'element',
'file' => 'file.field.inc',
],
'file_upload_help' => [
'variables' => ['description' => NULL, 'upload_validators' => NULL, 'cardinality' => NULL],
'file' => 'file.field.inc',
],
];
}
/**
* Implements hook_file_download().
*/
function file_file_download($uri) {
// Get the file record based on the URI. If not in the database just return.
/** @var \Drupal\file\FileInterface[] $files */
$files = entity_load_multiple_by_properties('file', ['uri' => $uri]);
if (count($files)) {
foreach ($files as $item) {
// Since some database servers sometimes use a case-insensitive comparison
// by default, double check that the filename is an exact match.
if ($item->getFileUri() === $uri) {
$file = $item;
break;
}
}
}
if (!isset($file)) {
return;
}
// Find out if a temporary file is still used in the system.
if ($file->isTemporary()) {
$usage = \Drupal::service('file.usage')->listUsage($file);
if (empty($usage) && $file->getOwnerId() != \Drupal::currentUser()->id()) {
// Deny access to temporary files without usage that are not owned by the
// same user. This prevents the security issue that a private file that
// was protected by field permissions becomes available after its usage
// was removed and before it is actually deleted from the file system.
// Modules that depend on this behavior should make the file permanent
// instead.
return -1;
}
}
// Find out which (if any) fields of this type contain the file.
$references = file_get_file_references($file, NULL, EntityStorageInterface::FIELD_LOAD_CURRENT, NULL);
// Stop processing if there are no references in order to avoid returning
// headers for files controlled by other modules. Make an exception for
// temporary files where the host entity has not yet been saved (for example,
// an image preview on a node/add form) in which case, allow download by the
// file's owner.
if (empty($references) && ($file->isPermanent() || $file->getOwnerId() != \Drupal::currentUser()->id())) {
return;
}
if (!$file->access('download')) {
return -1;
}
// Access is granted.
$headers = file_get_content_headers($file);
return $headers;
}
/**
* Implements hook_cron().
*/
function file_cron() {
$age = \Drupal::config('system.file')->get('temporary_maximum_age');
$file_storage = \Drupal::entityManager()->getStorage('file');
// Only delete temporary files if older than $age. Note that automatic cleanup
// is disabled if $age set to 0.
if ($age) {
$fids = Drupal::entityQuery('file')
->condition('status', FILE_STATUS_PERMANENT, '<>')
->condition('changed', REQUEST_TIME - $age, '<')
->range(0, 100)
->execute();
$files = $file_storage->loadMultiple($fids);
foreach ($files as $file) {
$references = \Drupal::service('file.usage')->listUsage($file);
if (empty($references)) {
if (file_exists($file->getFileUri())) {
$file->delete();
}
else {
\Drupal::logger('file system')->error('Could not delete temporary file "%path" during garbage collection', ['%path' => $file->getFileUri()]);
}
}
else {
\Drupal::logger('file system')->info('Did not delete temporary file "%path" during garbage collection because it is in use by the following modules: %modules.', ['%path' => $file->getFileUri(), '%modules' => implode(', ', array_keys($references))]);
}
}
}
}
/**
* Saves file uploads to a new location.
*
* The files will be added to the {file_managed} table as temporary files.
* Temporary files are periodically cleaned. Use the 'file.usage' service to
* register the usage of the file which will automatically mark it as permanent.
*
* @param string $form_field_name
* A string that is the associative array key of the upload form element in
* the form array.
* @param array $validators
* (optional) An associative array of callback functions used to validate the
* file. See file_validate() for a full discussion of the array format.
* If the array is empty, it will be set up to call file_validate_extensions()
* with a safe list of extensions, as follows: "jpg jpeg gif png txt doc
* xls pdf ppt pps odt ods odp". To allow all extensions, you must explicitly
* set this array to ['file_validate_extensions' => '']. (Beware: this is not
* safe and should only be allowed for trusted users, if at all.)
* @param string|false $destination
* (optional) A string containing the URI that the file should be copied to.
* This must be a stream wrapper URI. If this value is omitted or set to
* FALSE, Drupal's temporary files scheme will be used ("temporary://").
* @param null|int $delta
* (optional) The delta of the file to return the file entity.
* Defaults to NULL.
* @param int $replace
* (optional) The replace behavior when the destination file already exists.
* Possible values include:
* - FILE_EXISTS_REPLACE: Replace the existing file.
* - FILE_EXISTS_RENAME: (default) Append _{incrementing number} until the
* filename is unique.
* - FILE_EXISTS_ERROR: Do nothing and return FALSE.
*
* @return array|\Drupal\file\FileInterface|null|false
* An array of file entities or a single file entity if $delta != NULL. Each
* array element contains the file entity if the upload succeeded or FALSE if
* there was an error. Function returns NULL if no file was uploaded.
*/
function file_save_upload($form_field_name, $validators = [], $destination = FALSE, $delta = NULL, $replace = FILE_EXISTS_RENAME) {
$user = \Drupal::currentUser();
static $upload_cache;
$all_files = \Drupal::request()->files->get('files', []);
// Make sure there's an upload to process.
if (empty($all_files[$form_field_name])) {
return NULL;
}
$file_upload = $all_files[$form_field_name];
// Return cached objects without processing since the file will have
// already been processed and the paths in $_FILES will be invalid.
if (isset($upload_cache[$form_field_name])) {
if (isset($delta)) {
return $upload_cache[$form_field_name][$delta];
}
return $upload_cache[$form_field_name];
}
// Prepare uploaded files info. Representation is slightly different
// for multiple uploads and we fix that here.
$uploaded_files = $file_upload;
if (!is_array($file_upload)) {
$uploaded_files = [$file_upload];
}
$files = [];
foreach ($uploaded_files as $i => $file_info) {
// Check for file upload errors and return FALSE for this file if a lower
// level system error occurred. For a complete list of errors:
// See http://php.net/manual/features.file-upload.errors.php.
switch ($file_info->getError()) {
case UPLOAD_ERR_INI_SIZE:
case UPLOAD_ERR_FORM_SIZE:
drupal_set_message(t('The file %file could not be saved because it exceeds %maxsize, the maximum allowed size for uploads.', ['%file' => $file_info->getFilename(), '%maxsize' => format_size(file_upload_max_size())]), 'error');
$files[$i] = FALSE;
continue;
case UPLOAD_ERR_PARTIAL:
case UPLOAD_ERR_NO_FILE:
drupal_set_message(t('The file %file could not be saved because the upload did not complete.', ['%file' => $file_info->getFilename()]), 'error');
$files[$i] = FALSE;
continue;
case UPLOAD_ERR_OK:
// Final check that this is a valid upload, if it isn't, use the
// default error handler.
if (is_uploaded_file($file_info->getRealPath())) {
break;
}
// Unknown error
default:
drupal_set_message(t('The file %file could not be saved. An unknown error has occurred.', ['%file' => $file_info->getFilename()]), 'error');
$files[$i] = FALSE;
continue;
}
// Begin building file entity.
$values = [
'uid' => $user->id(),
'status' => 0,
'filename' => $file_info->getClientOriginalName(),
'uri' => $file_info->getRealPath(),
'filesize' => $file_info->getSize(),
];
$values['filemime'] = \Drupal::service('file.mime_type.guesser')->guess($values['filename']);
$file = File::create($values);
$extensions = '';
if (isset($validators['file_validate_extensions'])) {
if (isset($validators['file_validate_extensions'][0])) {
// Build the list of non-munged extensions if the caller provided them.
$extensions = $validators['file_validate_extensions'][0];
}
else {
// If 'file_validate_extensions' is set and the list is empty then the
// caller wants to allow any extension. In this case we have to remove the
// validator or else it will reject all extensions.
unset($validators['file_validate_extensions']);
}
}
else {
// No validator was provided, so add one using the default list.
// Build a default non-munged safe list for file_munge_filename().
$extensions = 'jpg jpeg gif png txt doc xls pdf ppt pps odt ods odp';
$validators['file_validate_extensions'] = [];
$validators['file_validate_extensions'][0] = $extensions;
}
if (!empty($extensions)) {
// Munge the filename to protect against possible malicious extension
// hiding within an unknown file type (ie: filename.html.foo).
$file->setFilename(file_munge_filename($file->getFilename(), $extensions));
}
// Rename potentially executable files, to help prevent exploits (i.e. will
// rename filename.php.foo and filename.php to filename.php.foo.txt and
// filename.php.txt, respectively). Don't rename if 'allow_insecure_uploads'
// evaluates to TRUE.
if (!\Drupal::config('system.file')->get('allow_insecure_uploads') && preg_match('/\.(php|pl|py|cgi|asp|js)(\.|$)/i', $file->getFilename()) && (substr($file->getFilename(), -4) != '.txt')) {
$file->setMimeType('text/plain');
// The destination filename will also later be used to create the URI.
$file->setFilename($file->getFilename() . '.txt');
// The .txt extension may not be in the allowed list of extensions. We have
// to add it here or else the file upload will fail.
if (!empty($extensions)) {
$validators['file_validate_extensions'][0] .= ' txt';
drupal_set_message(t('For security reasons, your upload has been renamed to %filename.', ['%filename' => $file->getFilename()]));
}
}
// If the destination is not provided, use the temporary directory.
if (empty($destination)) {
$destination = 'temporary://';
}
// Assert that the destination contains a valid stream.
$destination_scheme = file_uri_scheme($destination);
if (!file_stream_wrapper_valid_scheme($destination_scheme)) {
drupal_set_message(t('The file could not be uploaded because the destination %destination is invalid.', ['%destination' => $destination]), 'error');
$files[$i] = FALSE;
continue;
}
$file->source = $form_field_name;
// A file URI may already have a trailing slash or look like "public://".
if (substr($destination, -1) != '/') {
$destination .= '/';
}
$file->destination = file_destination($destination . $file->getFilename(), $replace);
// If file_destination() returns FALSE then $replace === FILE_EXISTS_ERROR and
// there's an existing file so we need to bail.
if ($file->destination === FALSE) {
drupal_set_message(t('The file %source could not be uploaded because a file by that name already exists in the destination %directory.', ['%source' => $form_field_name, '%directory' => $destination]), 'error');
$files[$i] = FALSE;
continue;
}
// Add in our check of the file name length.
$validators['file_validate_name_length'] = [];
// Call the validation functions specified by this function's caller.
$errors = file_validate($file, $validators);
// Check for errors.
if (!empty($errors)) {
$message = [
'error' => [
'#markup' => t('The specified file %name could not be uploaded.', ['%name' => $file->getFilename()]),
],
'item_list' => [
'#theme' => 'item_list',
'#items' => $errors,
],
];
// @todo Add support for render arrays in drupal_set_message()? See
// https://www.drupal.org/node/2505497.
drupal_set_message(\Drupal::service('renderer')->renderPlain($message), 'error');
$files[$i] = FALSE;
continue;
}
// Move uploaded files from PHP's upload_tmp_dir to Drupal's temporary
// directory. This overcomes open_basedir restrictions for future file
// operations.
$file->setFileUri($file->destination);
if (!drupal_move_uploaded_file($file_info->getRealPath(), $file->getFileUri())) {
drupal_set_message(t('File upload error. Could not move uploaded file.'), 'error');
\Drupal::logger('file')->notice('Upload error. Could not move uploaded file %file to destination %destination.', ['%file' => $file->getFilename(), '%destination' => $file->getFileUri()]);
$files[$i] = FALSE;
continue;
}
// Set the permissions on the new file.
drupal_chmod($file->getFileUri());
// If we are replacing an existing file re-use its database record.
// @todo Do not create a new entity in order to update it. See
// https://www.drupal.org/node/2241865.
if ($replace == FILE_EXISTS_REPLACE) {
$existing_files = entity_load_multiple_by_properties('file', ['uri' => $file->getFileUri()]);
if (count($existing_files)) {
$existing = reset($existing_files);
$file->fid = $existing->id();
$file->setOriginalId($existing->id());
}
}
// If we made it this far it's safe to record this file in the database.
$file->save();
$files[$i] = $file;
}
// Add files to the cache.
$upload_cache[$form_field_name] = $files;
return isset($delta) ? $files[$delta] : $files;
}
/**
* Determines the preferred upload progress implementation.
*
* @return string|false
* A string indicating which upload progress system is available. Either "apc"
* or "uploadprogress". If neither are available, returns FALSE.
*/
function file_progress_implementation() {
static $implementation;
if (!isset($implementation)) {
$implementation = FALSE;
// We prefer the PECL extension uploadprogress because it supports multiple
// simultaneous uploads. APCu only supports one at a time.
if (extension_loaded('uploadprogress')) {
$implementation = 'uploadprogress';
}
elseif (version_compare(PHP_VERSION, '7', '<') && extension_loaded('apc') && ini_get('apc.rfc1867')) {
$implementation = 'apc';
}
}
return $implementation;
}
/**
* Implements hook_ENTITY_TYPE_predelete() for file entities.
*/
function file_file_predelete(File $file) {
// @todo Remove references to a file that is in-use.
}
/**
* Implements hook_tokens().
*/
function file_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
$token_service = \Drupal::token();
$url_options = ['absolute' => TRUE];
if (isset($options['langcode'])) {
$url_options['language'] = \Drupal::languageManager()->getLanguage($options['langcode']);
$langcode = $options['langcode'];
}
else {
$langcode = NULL;
}
$replacements = [];
if ($type == 'file' && !empty($data['file'])) {
/** @var \Drupal\file\FileInterface $file */
$file = $data['file'];
foreach ($tokens as $name => $original) {
switch ($name) {
// Basic keys and values.
case 'fid':
$replacements[$original] = $file->id();
break;
// Essential file data
case 'name':
$replacements[$original] = $file->getFilename();
break;
case 'path':
$replacements[$original] = $file->getFileUri();
break;
case 'mime':
$replacements[$original] = $file->getMimeType();
break;
case 'size':
$replacements[$original] = format_size($file->getSize());
break;
case 'url':
// Ideally, this would use file_url_transform_relative(), but because
// tokens are also often used in e-mails, it's better to keep absolute
// file URLs. The 'url.site' cache context is associated to ensure the
// correct absolute URL is used in case of a multisite setup.
$replacements[$original] = file_create_url($file->getFileUri());
$bubbleable_metadata->addCacheContexts(['url.site']);
break;
// These tokens are default variations on the chained tokens handled below.
case 'created':
$date_format = DateFormat::load('medium');
$bubbleable_metadata->addCacheableDependency($date_format);
$replacements[$original] = format_date($file->getCreatedTime(), 'medium', '', NULL, $langcode);
break;
case 'changed':
$date_format = DateFormat::load('medium');
$bubbleable_metadata = $bubbleable_metadata->addCacheableDependency($date_format);
$replacements[$original] = format_date($file->getChangedTime(), 'medium', '', NULL, $langcode);
break;
case 'owner':
$owner = $file->getOwner();
$bubbleable_metadata->addCacheableDependency($owner);
$name = $owner->label();
$replacements[$original] = $name;
break;
}
}
if ($date_tokens = $token_service->findWithPrefix($tokens, 'created')) {
$replacements += $token_service->generate('date', $date_tokens, ['date' => $file->getCreatedTime()], $options, $bubbleable_metadata);
}
if ($date_tokens = $token_service->findWithPrefix($tokens, 'changed')) {
$replacements += $token_service->generate('date', $date_tokens, ['date' => $file->getChangedTime()], $options, $bubbleable_metadata);
}
if (($owner_tokens = $token_service->findWithPrefix($tokens, 'owner')) && $file->getOwner()) {
$replacements += $token_service->generate('user', $owner_tokens, ['user' => $file->getOwner()], $options, $bubbleable_metadata);
}
}
return $replacements;
}
/**
* Implements hook_token_info().
*/
function file_token_info() {
$types['file'] = [
'name' => t("Files"),
'description' => t("Tokens related to uploaded files."),
'needs-data' => 'file',
];
// File related tokens.
$file['fid'] = [
'name' => t("File ID"),
'description' => t("The unique ID of the uploaded file."),
];
$file['name'] = [
'name' => t("File name"),
'description' => t("The name of the file on disk."),
];
$file['path'] = [
'name' => t("Path"),
'description' => t("The location of the file relative to Drupal root."),
];
$file['mime'] = [
'name' => t("MIME type"),
'description' => t("The MIME type of the file."),
];
$file['size'] = [
'name' => t("File size"),
'description' => t("The size of the file."),
];
$file['url'] = [
'name' => t("URL"),
'description' => t("The web-accessible URL for the file."),
];
$file['created'] = [
'name' => t("Created"),
'description' => t("The date the file created."),
'type' => 'date',
];
$file['changed'] = [
'name' => t("Changed"),
'description' => t("The date the file was most recently changed."),
'type' => 'date',
];
$file['owner'] = [
'name' => t("Owner"),
'description' => t("The user who originally uploaded the file."),
'type' => 'user',
];
return [
'types' => $types,
'tokens' => [
'file' => $file,
],
];
}
/**
* Form submission handler for upload / remove buttons of managed_file elements.
*
* @see \Drupal\file\Element\ManagedFile::processManagedFile()
*/
function file_managed_file_submit($form, FormStateInterface $form_state) {
// Determine whether it was the upload or the remove button that was clicked,
// and set $element to the managed_file element that contains that button.
$parents = $form_state->getTriggeringElement()['#array_parents'];
$button_key = array_pop($parents);
$element = NestedArray::getValue($form, $parents);
// No action is needed here for the upload button, because all file uploads on
// the form are processed by \Drupal\file\Element\ManagedFile::valueCallback()
// regardless of which button was clicked. Action is needed here for the
// remove button, because we only remove a file in response to its remove
// button being clicked.
if ($button_key == 'remove_button') {
$fids = array_keys($element['#files']);
// Get files that will be removed.
if ($element['#multiple']) {
$remove_fids = [];
foreach (Element::children($element) as $name) {
if (strpos($name, 'file_') === 0 && $element[$name]['selected']['#value']) {
$remove_fids[] = (int) substr($name, 5);
}
}
$fids = array_diff($fids, $remove_fids);
}
else {
// If we deal with single upload element remove the file and set
// element's value to empty array (file could not be removed from
// element if we don't do that).
$remove_fids = $fids;
$fids = [];
}
foreach ($remove_fids as $fid) {
// If it's a temporary file we can safely remove it immediately, otherwise
// it's up to the implementing module to remove usages of files to have them
// removed.
if ($element['#files'][$fid] && $element['#files'][$fid]->isTemporary()) {
$element['#files'][$fid]->delete();
}
}
// Update both $form_state->getValues() and FormState::$input to reflect
// that the file has been removed, so that the form is rebuilt correctly.
// $form_state->getValues() must be updated in case additional submit
// handlers run, and for form building functions that run during the
// rebuild, such as when the managed_file element is part of a field widget.
// FormState::$input must be updated so that
// \Drupal\file\Element\ManagedFile::valueCallback() has correct information
// during the rebuild.
$form_state->setValueForElement($element['fids'], implode(' ', $fids));
NestedArray::setValue($form_state->getUserInput(), $element['fids']['#parents'], implode(' ', $fids));
}
// Set the form to rebuild so that $form is correctly updated in response to
// processing the file removal. Since this function did not change $form_state
// if the upload button was clicked, a rebuild isn't necessary in that
// situation and calling $form_state->disableRedirect() would suffice.
// However, we choose to always rebuild, to keep the form processing workflow
// consistent between the two buttons.
$form_state->setRebuild();
}
/**
* Saves any files that have been uploaded into a managed_file element.
*
* @param array $element
* The FAPI element whose values are being saved.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form.
*
* @return array|false
* An array of file entities for each file that was saved, keyed by its file
* ID. Each array element contains a file entity. Function returns FALSE if
* upload directory could not be created or no files were uploaded.
*/
function file_managed_file_save_upload($element, FormStateInterface $form_state) {
$upload_name = implode('_', $element['#parents']);
$all_files = \Drupal::request()->files->get('files', []);
if (empty($all_files[$upload_name])) {
return FALSE;
}
$file_upload = $all_files[$upload_name];
$destination = isset($element['#upload_location']) ? $element['#upload_location'] : NULL;
if (isset($destination) && !file_prepare_directory($destination, FILE_CREATE_DIRECTORY)) {
\Drupal::logger('file')->notice('The upload directory %directory for the file field %name could not be created or is not accessible. A newly uploaded file could not be saved in this directory as a consequence, and the upload was canceled.', ['%directory' => $destination, '%name' => $element['#field_name']]);
$form_state->setError($element, t('The file could not be uploaded.'));
return FALSE;
}
// Save attached files to the database.
$files_uploaded = $element['#multiple'] && count(array_filter($file_upload)) > 0;
$files_uploaded |= !$element['#multiple'] && !empty($file_upload);
if ($files_uploaded) {
if (!$files = file_save_upload($upload_name, $element['#upload_validators'], $destination)) {
\Drupal::logger('file')->notice('The file upload failed. %upload', ['%upload' => $upload_name]);
$form_state->setError($element, t('Files in the @name field were unable to be uploaded.', ['@name' => $element['#title']]));
return [];
}
// Value callback expects FIDs to be keys.
$files = array_filter($files);
$fids = array_map(function($file) { return $file->id(); }, $files);
return empty($files) ? [] : array_combine($fids, $files);
}
return [];
}
/**
* Prepares variables for file form widget templates.
*
* Default template: file-managed-file.html.twig.
*
* @param array $variables
* An associative array containing:
* - element: A render element representing the file.
*/
function template_preprocess_file_managed_file(&$variables) {
$element = $variables['element'];
$variables['attributes'] = [];
if (isset($element['#id'])) {
$variables['attributes']['id'] = $element['#id'];
}
if (!empty($element['#attributes']['class'])) {
$variables['attributes']['class'] = (array) $element['#attributes']['class'];
}
}
/**
* Prepares variables for file link templates.
*
* Default template: file-link.html.twig.
*
* @param array $variables
* An associative array containing:
* - file: A file object to which the link will be created.
* - icon_directory: (optional) A path to a directory of icons to be used for
* files. Defaults to the value of the "icon.directory" variable.
* - description: A description to be displayed instead of the filename.
* - attributes: An associative array of attributes to be placed in the a tag.
*/
function template_preprocess_file_link(&$variables) {
$file = $variables['file'];
$options = [];
$file_entity = ($file instanceof File) ? $file : File::load($file->fid);
// @todo Wrap in file_url_transform_relative(). This is currently
// impossible. As a work-around, we currently add the 'url.site' cache context
// to ensure different file URLs are generated for different sites in a
// multisite setup, including HTTP and HTTPS versions of the same site.
// Fix in https://www.drupal.org/node/2646744.
$url = file_create_url($file_entity->getFileUri());
$variables['#cache']['contexts'][] = 'url.site';
$mime_type = $file->getMimeType();
// Set options as per anchor format described at
// http://microformats.org/wiki/file-format-examples
$options['attributes']['type'] = $mime_type . '; length=' . $file->getSize();
// Use the description as the link text if available.
if (empty($variables['description'])) {
$link_text = $file_entity->getFilename();
}
else {
$link_text = $variables['description'];
$options['attributes']['title'] = $file_entity->getFilename();
}
// Classes to add to the file field for icons.
$classes = [
'file',
// Add a specific class for each and every mime type.
'file--mime-' . strtr($mime_type, ['/' => '-', '.' => '-']),
// Add a more general class for groups of well known MIME types.
'file--' . file_icon_class($mime_type),
];
// Set file classes to the options array.
$variables['attributes'] = new Attribute($variables['attributes']);
$variables['attributes']->addClass($classes);
$variables['link'] = \Drupal::l($link_text, Url::fromUri($url, $options));
}
/**
* Gets a class for the icon for a MIME type.
*
* @param string $mime_type
* A MIME type.
*
* @return string
* A class associated with the file.
*/
function file_icon_class($mime_type) {
// Search for a group with the files MIME type.
$generic_mime = (string) file_icon_map($mime_type);
if (!empty($generic_mime)) {
return $generic_mime;
}
// Use generic icons for each category that provides such icons.
foreach (['audio', 'image', 'text', 'video'] as $category) {
if (strpos($mime_type, $category) === 0) {
return $category;
}
}
// If there's no generic icon for the type the general class.
return 'general';
}
/**
* Determines the generic icon MIME package based on a file's MIME type.
*
* @param string $mime_type
* A MIME type.
*
* @return string|false
* The generic icon MIME package expected for this file.
*/
function file_icon_map($mime_type) {
switch ($mime_type) {
// Word document types.
case 'application/msword':
case 'application/vnd.ms-word.document.macroEnabled.12':
case 'application/vnd.oasis.opendocument.text':
case 'application/vnd.oasis.opendocument.text-template':
case 'application/vnd.oasis.opendocument.text-master':
case 'application/vnd.oasis.opendocument.text-web':
case 'application/vnd.openxmlformats-officedocument.wordprocessingml.document':
case 'application/vnd.stardivision.writer':
case 'application/vnd.sun.xml.writer':
case 'application/vnd.sun.xml.writer.template':
case 'application/vnd.sun.xml.writer.global':
case 'application/vnd.wordperfect':
case 'application/x-abiword':
case 'application/x-applix-word':
case 'application/x-kword':
case 'application/x-kword-crypt':
return 'x-office-document';
// Spreadsheet document types.
case 'application/vnd.ms-excel':
case 'application/vnd.ms-excel.sheet.macroEnabled.12':
case 'application/vnd.oasis.opendocument.spreadsheet':
case 'application/vnd.oasis.opendocument.spreadsheet-template':
case 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet':
case 'application/vnd.stardivision.calc':
case 'application/vnd.sun.xml.calc':
case 'application/vnd.sun.xml.calc.template':
case 'application/vnd.lotus-1-2-3':
case 'application/x-applix-spreadsheet':
case 'application/x-gnumeric':
case 'application/x-kspread':
case 'application/x-kspread-crypt':
return 'x-office-spreadsheet';
// Presentation document types.
case 'application/vnd.ms-powerpoint':
case 'application/vnd.ms-powerpoint.presentation.macroEnabled.12':
case 'application/vnd.oasis.opendocument.presentation':
case 'application/vnd.oasis.opendocument.presentation-template':
case 'application/vnd.openxmlformats-officedocument.presentationml.presentation':
case 'application/vnd.stardivision.impress':
case 'application/vnd.sun.xml.impress':
case 'application/vnd.sun.xml.impress.template':
case 'application/x-kpresenter':
return 'x-office-presentation';
// Compressed archive types.
case 'application/zip':
case 'application/x-zip':
case 'application/stuffit':
case 'application/x-stuffit':
case 'application/x-7z-compressed':
case 'application/x-ace':
case 'application/x-arj':
case 'application/x-bzip':
case 'application/x-bzip-compressed-tar':
case 'application/x-compress':
case 'application/x-compressed-tar':
case 'application/x-cpio-compressed':
case 'application/x-deb':
case 'application/x-gzip':
case 'application/x-java-archive':
case 'application/x-lha':
case 'application/x-lhz':
case 'application/x-lzop':
case 'application/x-rar':
case 'application/x-rpm':
case 'application/x-tzo':
case 'application/x-tar':
case 'application/x-tarz':
case 'application/x-tgz':
return 'package-x-generic';
// Script file types.
case 'application/ecmascript':
case 'application/javascript':
case 'application/mathematica':
case 'application/vnd.mozilla.xul+xml':
case 'application/x-asp':
case 'application/x-awk':
case 'application/x-cgi':
case 'application/x-csh':
case 'application/x-m4':
case 'application/x-perl':
case 'application/x-php':
case 'application/x-ruby':
case 'application/x-shellscript':
case 'text/vnd.wap.wmlscript':
case 'text/x-emacs-lisp':
case 'text/x-haskell':
case 'text/x-literate-haskell':
case 'text/x-lua':
case 'text/x-makefile':
case 'text/x-matlab':
case 'text/x-python':
case 'text/x-sql':
case 'text/x-tcl':
return 'text-x-script';
// HTML aliases.
case 'application/xhtml+xml':
return 'text-html';
// Executable types.
case 'application/x-macbinary':
case 'application/x-ms-dos-executable':
case 'application/x-pef-executable':
return 'application-x-executable';
// Acrobat types
case 'application/pdf':
case 'application/x-pdf':
case 'applications/vnd.pdf':
case 'text/pdf':
case 'text/x-pdf':
return 'application-pdf';
default:
return FALSE;
}
}
/**
* Retrieves a list of references to a file.
*
* @param \Drupal\file\FileInterface $file
* A file entity.
* @param \Drupal\Core\Field\FieldDefinitionInterface|null $field
* (optional) A field definition to be used for this check. If given,
* limits the reference check to the given field. Defaults to NULL.
* @param int $age
* (optional) A constant that specifies which references to count. Use
* EntityStorageInterface::FIELD_LOAD_REVISION (the default) to retrieve all
* references within all revisions or
* EntityStorageInterface::FIELD_LOAD_CURRENT to retrieve references only in
* the current revisions of all entities that have references to this file.
* @param string $field_type
* (optional) The name of a field type. If given, limits the reference check
* to fields of the given type. If both $field and $field_type are given but
* $field is not the same type as $field_type, an empty array will be
* returned. Defaults to 'file'.
*
* @return array
* A multidimensional array. The keys are field_name, entity_type,
* entity_id and the value is an entity referencing this file.
*
* @ingroup file
*/
function file_get_file_references(FileInterface $file, FieldDefinitionInterface $field = NULL, $age = EntityStorageInterface::FIELD_LOAD_REVISION, $field_type = 'file') {
$references = &drupal_static(__FUNCTION__, []);
$field_columns = &drupal_static(__FUNCTION__ . ':field_columns', []);
// Fill the static cache, disregard $field and $field_type for now.
if (!isset($references[$file->id()][$age])) {
$references[$file->id()][$age] = [];
$usage_list = \Drupal::service('file.usage')->listUsage($file);
$file_usage_list = isset($usage_list['file']) ? $usage_list['file'] : [];
foreach ($file_usage_list as $entity_type_id => $entity_ids) {
$entities = \Drupal::entityTypeManager()
->getStorage($entity_type_id)->loadMultiple(array_keys($entity_ids));
foreach ($entities as $entity) {
$bundle = $entity->bundle();
// We need to find file fields for this entity type and bundle.
if (!isset($file_fields[$entity_type_id][$bundle])) {
$file_fields[$entity_type_id][$bundle] = [];
// This contains the possible field names.
foreach ($entity->getFieldDefinitions() as $field_name => $field_definition) {
// If this is the first time this field type is seen, check
// whether it references files.
if (!isset($field_columns[$field_definition->getType()])) {
$field_columns[$field_definition->getType()] = file_field_find_file_reference_column($field_definition);
}
// If the field type does reference files then record it.
if ($field_columns[$field_definition->getType()]) {
$file_fields[$entity_type_id][$bundle][$field_name] = $field_columns[$field_definition->getType()];
}
}
}
foreach ($file_fields[$entity_type_id][$bundle] as $field_name => $field_column) {
// Iterate over the field items to find the referenced file and field
// name. This will fail if the usage checked is in a non-current
// revision because field items are from the current
// revision.
// We also iterate over all translations because a file can be linked
// to a language other than the default.
foreach ($entity->getTranslationLanguages() as $langcode => $language) {
foreach ($entity->getTranslation($langcode)->get($field_name) as $item) {
if ($file->id() == $item->{$field_column}) {
$references[$file->id()][$age][$field_name][$entity_type_id][$entity->id()] = $entity;
break;
}
}
}
}
}
}
}
$return = $references[$file->id()][$age];
// Filter the static cache down to the requested entries. The usual static
// cache is very small so this will be very fast.
if ($field || $field_type) {
foreach ($return as $field_name => $data) {
foreach (array_keys($data) as $entity_type_id) {
$field_storage_definitions = \Drupal::entityManager()->getFieldStorageDefinitions($entity_type_id);
$current_field = $field_storage_definitions[$field_name];
if (($field_type && $current_field->getType() != $field_type) || ($field && $field->uuid() != $current_field->uuid())) {
unset($return[$field_name][$entity_type_id]);
}
}
}
}
return $return;
}
/**
* Formats human-readable version of file status.
*
* @param int|null $choice
* (optional) An integer status code. If not set, all statuses are returned.
* Defaults to NULL.
*
* @return \Drupal\Core\StringTranslation\TranslatableMarkup|\Drupal\Core\StringTranslation\TranslatableMarkup[]
* An array of file statuses or a specified status if $choice is set.
*/
function _views_file_status($choice = NULL) {
$status = [
0 => t('Temporary'),
FILE_STATUS_PERMANENT => t('Permanent'),
];
if (isset($choice)) {
return isset($status[$choice]) ? $status[$choice] : t('Unknown');
}
return $status;
}