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class InteractiveUpload in Lightning Media 8.2

Same name and namespace in other branches
  1. 8.4 src/Element/InteractiveUpload.php \Drupal\lightning_media\Element\InteractiveUpload
  2. 8 src/Element/InteractiveUpload.php \Drupal\lightning_media\Element\InteractiveUpload
  3. 8.3 src/Element/InteractiveUpload.php \Drupal\lightning_media\Element\InteractiveUpload

A form element for uploading or deleting files interactively.

Plugin annotation

@FormElement("interactive_upload");

Hierarchy

Expanded class hierarchy of InteractiveUpload

File

src/Element/InteractiveUpload.php, line 15

Namespace

Drupal\lightning_media\Element
View source
class InteractiveUpload extends FormElement {

  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    return [
      '#tree' => TRUE,
      '#input' => TRUE,
      '#title' => NULL,
      '#default_value' => NULL,
      '#process' => [
        [
          static::class,
          'process',
        ],
      ],
      '#upload_location' => 'public://',
      '#upload_validators' => [],
    ];
  }

  /**
   * Processes the element.
   *
   * @param array $element
   *   The unprocessed element.
   * @param FormStateInterface $form_state
   *   The current form state.
   *
   * @return array
   *   The processed element.
   */
  public static function process(array $element, FormStateInterface $form_state) {
    $element['fid'] = [
      '#type' => 'hidden',
    ];
    $element['upload'] = $element['remove'] = [
      '#type' => 'submit',
      '#is_button' => TRUE,
      '#limit_validation_errors' => [
        $element['#parents'],
      ],
      '#weight' => 100,
    ];
    $element['upload']['#value'] = t('Upload');
    $element['upload']['#submit'][] = [
      static::class,
      'upload',
    ];
    $element['remove']['#value'] = t('Remove');
    $element['remove']['#submit'][] = [
      static::class,
      'remove',
    ];
    $key = array_merge($element['#parents'], [
      'fid',
    ]);

    // Don't use $form_state->hasValue(), because it will return TRUE if the
    // value exists and is falsy. Valid file IDs will always be truthy.
    $fid = $form_state
      ->getValue($key);
    if ($fid) {
      $element['fid']['#value'] = $fid;
      $element['file'] = [
        '#theme' => 'file_link',
        '#file' => File::load($fid),
      ];
      $element['upload']['#access'] = FALSE;
    }
    else {
      $element['file'] = [
        '#type' => 'upload',
        '#title' => $element['#title'],
        '#upload_location' => $element['#upload_location'],
        '#upload_validators' => $element['#upload_validators'],
      ];
      $element['remove']['#access'] = FALSE;
    }
    return $element;
  }

  /**
   * Returns the root element for a triggering element.
   *
   * @param array $form
   *   The complete form.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current form state.
   *
   * @return array
   *   The root element that contains the triggering element.
   */
  public static function el(array &$form, FormStateInterface $form_state) {
    $trigger = $form_state
      ->getTriggeringElement();
    return NestedArray::getValue($form, array_slice($trigger['#array_parents'], 0, -1));
  }

  /**
   * Handles form submission when the Upload button is clicked.
   *
   * @param array $form
   *   The complete form.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current form state.
   */
  public static function upload(array &$form, FormStateInterface $form_state) {
    $el = static::el($form, $form_state);
    $form_state
      ->setValueForElement($el['fid'], $el['file']['#value']);
    NestedArray::setValue($form_state
      ->getUserInput(), $el['fid']['#parents'], $el['file']['#value']);
    $form_state
      ->setRebuild();
  }

  /**
   * Handles form submission when the Remove button is clicked.
   *
   * @param array $form
   *   The complete form.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current form state.
   */
  public static function remove(array &$form, FormStateInterface $form_state) {
    $el = static::el($form, $form_state);
    Upload::delete($el['fid']);
    $form_state
      ->setValueForElement($el['fid'], NULL);
    NestedArray::setValue($form_state
      ->getUserInput(), $el['fid']['#parents'], NULL);
    $form_state
      ->setRebuild();
  }

}

Members

Namesort descending Modifiers Type Description Overrides
DependencySerializationTrait::$_entityStorages protected property An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds protected property An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep public function 1
DependencySerializationTrait::__wakeup public function 2
FormElement::processAutocomplete public static function Adds autocomplete functionality to elements.
FormElement::processPattern public static function #process callback for #pattern form element property.
FormElement::validatePattern public static function #element_validate callback for #pattern form element property.
FormElement::valueCallback public static function Determines how user input is mapped to an element's #value property. Overrides FormElementInterface::valueCallback 15
InteractiveUpload::el public static function Returns the root element for a triggering element.
InteractiveUpload::getInfo public function Returns the element properties for this element. Overrides ElementInterface::getInfo
InteractiveUpload::process public static function Processes the element. 1
InteractiveUpload::remove public static function Handles form submission when the Remove button is clicked.
InteractiveUpload::upload public static function Handles form submission when the Upload button is clicked.
MessengerTrait::$messenger protected property The messenger. 29
MessengerTrait::messenger public function Gets the messenger. 29
MessengerTrait::setMessenger public function Sets the messenger.
PluginBase::$configuration protected property Configuration information passed into the plugin. 1
PluginBase::$pluginDefinition protected property The plugin implementation definition. 1
PluginBase::$pluginId protected property The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR constant A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId public function Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId public function Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition public function Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition 3
PluginBase::getPluginId public function Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable public function Determines if the plugin is configurable.
PluginBase::__construct public function Constructs a \Drupal\Component\Plugin\PluginBase object. 92
RenderElement::preRenderAjaxForm public static function Adds Ajax information about an element to communicate with JavaScript.
RenderElement::preRenderGroup public static function Adds members of this group as actual elements for rendering.
RenderElement::processAjaxForm public static function Form element processing handler for the #ajax form property. 1
RenderElement::processGroup public static function Arranges elements into groups.
RenderElement::setAttributes public static function Sets a form element's class attribute. Overrides ElementInterface::setAttributes
StringTranslationTrait::$stringTranslation protected property The string translation service. 1
StringTranslationTrait::formatPlural protected function Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals protected function Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation protected function Gets the string translation service.
StringTranslationTrait::setStringTranslation public function Sets the string translation service to use. 2
StringTranslationTrait::t protected function Translates a string to the current language or to a given language.