Commit fdef8555 authored by xjm's avatar xjm

Issue #2896480 by mpdonadio, dawehner, Berdir, martin107: Allow to reference...

Issue #2896480 by mpdonadio, dawehner, Berdir, martin107: Allow to reference permanent files with 0 usages
parent f9c65b11
......@@ -398,15 +398,23 @@ public static function preRenderManagedFile($element) {
* Render API callback: Validates the managed_file element.
*/
public static function validateManagedFile(&$element, FormStateInterface $form_state, &$complete_form) {
// If referencing an existing file, only allow if there are existing
// references. This prevents unmanaged files from being deleted if this
// item were to be deleted.
$clicked_button = end($form_state->getTriggeringElement()['#parents']);
if ($clicked_button != 'remove_button' && !empty($element['fids']['#value'])) {
$fids = $element['fids']['#value'];
foreach ($fids as $fid) {
if ($file = File::load($fid)) {
if ($file->isPermanent()) {
// If referencing an existing file, only allow if there are existing
// references. This prevents unmanaged files from being deleted if
// this item were to be deleted. When files that are no longer in use
// are automatically marked as temporary (now disabled by default),
// it is not safe to reference a permanent file without usage. Adding
// a usage and then later on removing it again would delete the file,
// but it is unknown if and where it is currently referenced. However,
// when files are not marked temporary (and then removed)
// automatically, it is safe to add and remove usages, as it would
// simply return to the current state.
// @see https://www.drupal.org/node/2891902
if ($file->isPermanent() && \Drupal::config('file.settings')->get('make_unused_managed_files_temporary')) {
$references = static::fileUsage()->listUsage($file);
if (empty($references)) {
// We expect the field name placeholder value to be wrapped in t()
......
......@@ -194,4 +194,55 @@ public function testFileRemovedFromDisk() {
$file->delete();
}
/**
* Verify that unused permanent files can be used.
*/
public function testUnusedPermanentFileValidation() {
// Create a permanent file without usages.
$file = $this->getTestFile('image');
$file->setPermanent();
$file->save();
// By default, unused files are no longer marked temporary, and it must be
// allowed to reference an unused file.
$this->drupalGet('file/test/1/0/1/' . $file->id());
$this->drupalPostForm(NULL, [], 'Save');
$this->assertNoText('The file used in the Managed file & butter field may not be referenced.');
$this->assertText('The file ids are ' . $file->id());
// Enable marking unused files as tempory, unused permanent files must not
// be referenced now.
$this->config('file.settings')
->set('make_unused_managed_files_temporary', TRUE)
->save();
$this->drupalGet('file/test/1/0/1/' . $file->id());
$this->drupalPostForm(NULL, [], 'Save');
$this->assertText('The file used in the Managed file & butter field may not be referenced.');
$this->assertNoText('The file ids are ' . $file->id());
// Make the file temporary, now using it is allowed.
$file->setTemporary();
$file->save();
$this->drupalGet('file/test/1/0/1/' . $file->id());
$this->drupalPostForm(NULL, [], 'Save');
$this->assertNoText('The file used in the Managed file & butter field may not be referenced.');
$this->assertText('The file ids are ' . $file->id());
// Make the file permanent again and add a usage from itself, referencing is
// still allowed.
$file->setPermanent();
$file->save();
/** @var \Drupal\file\FileUsage\FileUsageInterface $file_usage */
$file_usage = \Drupal::service('file.usage');
$file_usage->add($file, 'file', 'file', $file->id());
$this->drupalGet('file/test/1/0/1/' . $file->id());
$this->drupalPostForm(NULL, [], 'Save');
$this->assertNoText('The file used in the Managed file & butter field may not be referenced.');
$this->assertText('The file ids are ' . $file->id());
}
}
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