public static ManagedFile::valueCallback(&$element, $input, FormStateInterface $form_state)
Determines how user input is mapped to an element's #value property.
Parameters
array $element: An associative array containing the properties of the element.
mixed $input: The incoming input to populate the form element. If this is FALSE, the element's default value should be returned.
\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.
Return value
mixed The value to assign to the element.
Overrides FormElement::valueCallback
File
- core/modules/file/src/Element/ManagedFile.php, line 58
Class
- ManagedFile
- Provides an AJAX/progress aware widget for uploading and saving a file.
Namespace
Drupal\file\Element
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | public static function valueCallback(&$element, $input, FormStateInterface $form_state) { // Find the current value of this field. $fids = !empty($input['fids']) ? explode(' ', $input['fids']) : []; foreach ($fids as $key => $fid) { $fids[$key] = (int) $fid; } $force_default = FALSE; // Process any input and save new uploads. if ($input !== FALSE) { $input['fids'] = $fids; $return = $input; // Uploads take priority over all other values. if ($files = file_managed_file_save_upload($element, $form_state)) { if ($element['#multiple']) { $fids = array_merge($fids, array_keys($files)); } else { $fids = array_keys($files); } } else { // Check for #filefield_value_callback values. // Because FAPI does not allow multiple #value_callback values like it // does for #element_validate and #process, this fills the missing // functionality to allow File fields to be extended through FAPI. if (isset($element['#file_value_callbacks'])) { foreach ($element['#file_value_callbacks'] as $callback) { $callback($element, $input, $form_state); } } // Load files if the FIDs have changed to confirm they exist. if (!empty($input['fids'])) { $fids = []; foreach ($input['fids'] as $fid) { if ($file = File::load($fid)) { $fids[] = $file->id(); // Temporary files that belong to other users should never be // allowed. if ($file->isTemporary()) { if ($file->getOwnerId() != \Drupal::currentUser()->id()) { $force_default = TRUE; break; } // Since file ownership can't be determined for anonymous users, // they are not allowed to reuse temporary files at all. But // they do need to be able to reuse their own files from earlier // submissions of the same form, so to allow that, check for the // token added by $this->processManagedFile(). elseif (\Drupal::currentUser()->isAnonymous()) { $token = NestedArray::getValue($form_state->getUserInput(), array_merge($element['#parents'], array('file_' . $file->id(), 'fid_token'))); if ($token !== Crypt::hmacBase64('file-' . $file->id(), \Drupal::service('private_key')->get() . Settings::getHashSalt())) { $force_default = TRUE; break; } } } } } if ($force_default) { $fids = []; } } } } // If there is no input or if the default value was requested above, use the // default value. if ($input === FALSE || $force_default) { if ($element['#extended']) { $default_fids = isset($element['#default_value']['fids']) ? $element['#default_value']['fids'] : []; $return = isset($element['#default_value']) ? $element['#default_value'] : ['fids' => []]; } else { $default_fids = isset($element['#default_value']) ? $element['#default_value'] : []; $return = ['fids' => []]; } // Confirm that the file exists when used as a default value. if (!empty($default_fids)) { $fids = []; foreach ($default_fids as $fid) { if ($file = File::load($fid)) { $fids[] = $file->id(); } } } } $return['fids'] = $fids; return $return;} |
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