function FileWidget::submit

Form submission handler for upload/remove button of formElement().

This runs in addition to and after file_managed_file_submit().

See also

file_managed_file_submit()

File

core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php, line 548

Class

FileWidget

Plugin implementation of the 'file_generic' widget.

Namespace

Code

public static function submit($form, FormStateInterface $form_state) {
    // During the form rebuild, formElement() will create field item widget
    // elements using re-indexed deltas, so clear out FormState::$input to
    // avoid a mismatch between old and new deltas. The rebuilt elements will
    // have #default_value set appropriately for the current state of the field,
    // so nothing is lost in doing this.
    $button = $form_state->getTriggeringElement();
    $parents = array_slice($button['#parents'], 0, -2);
    NestedArray::setValue($form_state->getUserInput(), $parents, NULL);
    // Go one level up in the form, to the widgets container.
    $element = NestedArray::getValue($form, array_slice($button['#array_parents'], 0, -1));
    $field_name = $element['#field_name'];
    $parents = $element['#field_parents'];
    $submitted_values = NestedArray::getValue($form_state->getValues(), array_slice($button['#parents'], 0, -2));
    foreach ($submitted_values as $delta => $submitted_value) {
        if (empty($submitted_value['fids'])) {
            unset($submitted_values[$delta]);
        }
    }
    // If there are more files uploaded via the same widget, we have to separate
    // them, as we display each file in its own widget.
    $new_values = [];
    foreach ($submitted_values as $delta => $submitted_value) {
        if (is_array($submitted_value['fids'])) {
            foreach ($submitted_value['fids'] as $fid) {
                $new_value = $submitted_value;
                $new_value['fids'] = [
                    $fid,
                ];
                $new_values[] = $new_value;
            }
        }
        else {
            $new_value = $submitted_value;
        }
    }
    // Re-index deltas after removing empty items.
    $submitted_values = array_values($new_values);
    // Update form_state values.
    NestedArray::setValue($form_state->getValues(), array_slice($button['#parents'], 0, -2), $submitted_values);
    // Update items.
    $field_state = static::getWidgetState($parents, $field_name, $form_state);
    $field_state['items'] = $submitted_values;
    static::setWidgetState($parents, $field_name, $form_state, $field_state);
}