--- /dev/null
+<?php
+
+/**
+ * @file
+ * Contains hook implementations for the media_library module.
+ */
+
+use Drupal\Component\Utility\UrlHelper;
+use Drupal\Component\Serialization\Json;
+use Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Render\Element;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\Core\Template\Attribute;
+use Drupal\Core\Url;
+use Drupal\views\Form\ViewsForm;
+use Drupal\views\Plugin\views\cache\CachePluginBase;
+use Drupal\views\Plugin\views\query\QueryPluginBase;
+use Drupal\views\Plugin\views\query\Sql;
+use Drupal\views\ViewExecutable;
+
+/**
+ * Implements hook_help().
+ *
+ * @todo Update in https://www.drupal.org/project/drupal/issues/2964789
+ */
+function media_library_help($route_name, RouteMatchInterface $route_match) {
+ switch ($route_name) {
+ case 'help.page.media_library':
+ $output = '<h3>' . t('About') . '</h3>';
+ $output .= '<p>' . t('The Media library module overrides the /admin/content/media view to provide a rich visual interface for performing administrative operations on media. For more information, see the <a href=":media">online documentation for the Media library module</a>.', [':media' => 'https://www.drupal.org/docs/8/core/modules/media']) . '</p>';
+ return $output;
+ }
+}
+
+/**
+ * Implements hook_theme().
+ */
+function media_library_theme() {
+ return [
+ 'media__media_library' => [
+ 'base hook' => 'media',
+ ],
+ ];
+}
+
+/**
+ * Implements hook_preprocess_view().
+ *
+ * Adds a link to add media above the view.
+ */
+function media_library_preprocess_views_view(&$variables) {
+ $view = $variables['view'];
+ if ($view->id() === 'media_library' && $view->current_display === 'widget') {
+ $url = Url::fromRoute('media_library.upload');
+ if ($url->access()) {
+ $url->setOption('query', \Drupal::request()->query->all());
+ $variables['header']['add_media'] = [
+ '#type' => 'link',
+ '#title' => t('Add media'),
+ '#url' => $url,
+ '#attributes' => [
+ 'class' => ['button', 'button-action', 'button--primary', 'use-ajax'],
+ 'data-dialog-type' => 'modal',
+ 'data-dialog-options' => Json::encode([
+ 'dialogClass' => 'media-library-widget-modal',
+ 'height' => '75%',
+ 'width' => '75%',
+ 'title' => t('Add media'),
+ ]),
+ ],
+ ];
+ }
+ }
+}
+
+/**
+ * Implements hook_views_post_render().
+ */
+function media_library_views_post_render(ViewExecutable $view, &$output, CachePluginBase $cache) {
+ if ($view->id() === 'media_library') {
+ $output['#attached']['library'][] = 'media_library/view';
+ if ($view->current_display === 'widget') {
+ $query = array_intersect_key(\Drupal::request()->query->all(), array_flip([
+ 'media_library_widget_id',
+ 'media_library_allowed_types',
+ 'media_library_remaining',
+ ]));
+ // If the current query contains any parameters we use to contextually
+ // filter the view, ensure they persist across AJAX rebuilds.
+ // The ajax_path is shared for all AJAX views on the page, but our query
+ // parameters are prefixed and should not interfere with any other views.
+ // @todo Rework or remove this in https://www.drupal.org/node/2983451
+ if (!empty($query)) {
+ $ajax_path = &$output['#attached']['drupalSettings']['views']['ajax_path'];
+ $parsed_url = UrlHelper::parse($ajax_path);
+ $query = array_merge($query, $parsed_url['query']);
+ $ajax_path = $parsed_url['path'] . '?' . UrlHelper::buildQuery($query);
+ if (isset($query['media_library_remaining'])) {
+ $output['#attached']['drupalSettings']['media_library']['selection_remaining'] = (int) $query['media_library_remaining'];
+ }
+ }
+ }
+ }
+}
+
+/**
+ * Implements hook_preprocess_media().
+ */
+function media_library_preprocess_media(&$variables) {
+ if ($variables['view_mode'] === 'media_library') {
+ /** @var \Drupal\media\MediaInterface $media */
+ $media = $variables['media'];
+ $variables['#cache']['contexts'][] = 'user.permissions';
+ $rel = $media->access('edit') ? 'edit-form' : 'canonical';
+ $variables['url'] = $media->toUrl($rel, [
+ 'language' => $media->language(),
+ ]);
+ $variables['preview_attributes'] = new Attribute();
+ $variables['preview_attributes']->addClass('media-library-item__preview', 'js-media-library-item-preview', 'js-click-to-select-trigger');
+ $variables['metadata_attributes'] = new Attribute();
+ $variables['metadata_attributes']->addClass('media-library-item__attributes');
+ $variables['status'] = $media->isPublished();
+ }
+}
+
+/**
+ * Alter the bulk form to add a more accessible label.
+ *
+ * @param array $form
+ * An associative array containing the structure of the form.
+ * @param \Drupal\Core\Form\FormStateInterface $form_state
+ * The current state of the form.
+ *
+ * @todo Remove in https://www.drupal.org/node/2983454
+ */
+function media_library_form_views_form_media_library_page_alter(array &$form, FormStateInterface $form_state) {
+ if (isset($form['media_bulk_form']) && isset($form['output'])) {
+ /** @var \Drupal\views\ViewExecutable $view */
+ $view = $form['output'][0]['#view'];
+ foreach (Element::getVisibleChildren($form['media_bulk_form']) as $key) {
+ if (isset($view->result[$key])) {
+ $media = $view->field['media_bulk_form']->getEntity($view->result[$key]);
+ $form['media_bulk_form'][$key]['#title'] = t('Select @label', [
+ '@label' => $media->label(),
+ ]);
+ }
+ }
+ }
+}
+
+/**
+ * Implements hook_form_alter().
+ */
+function media_library_form_alter(array &$form, FormStateInterface $form_state, $form_id) {
+ $form_object = $form_state->getFormObject();
+ if ($form_object instanceof ViewsForm && strpos($form_object->getBaseFormId(), 'views_form_media_library') === 0) {
+ $form['#attributes']['class'][] = 'media-library-views-form';
+ if (isset($form['header'])) {
+ $form['header']['#attributes']['class'][] = 'media-library-views-form__header';
+ $form['header']['media_bulk_form']['#attributes']['class'][] = 'media-library-views-form__bulk_form';
+ }
+ }
+
+ // Add after build to fix media library views exposed filter's submit button.
+ if ($form_id === 'views_exposed_form' && $form['#id'] === 'views-exposed-form-media-library-widget') {
+ $form['#after_build'][] = '_media_library_views_form_media_library_after_build';
+ }
+}
+
+/**
+ * After build callback for views form media library.
+ */
+function _media_library_views_form_media_library_after_build(array $form, FormStateInterface $form_state) {
+ // Remove .form-actions from media library views exposed filter actions
+ // and replace with .media-library-view--form-actions.
+ //
+ // This prevents the views exposed filter's 'Apply filter' submit button from
+ // being moved into the dialog's buttons.
+ // @see \Drupal\Core\Render\Element\Actions::processActions
+ // @see Drupal.behaviors.dialog.prepareDialogButtons
+ if (($key = array_search('form-actions', $form['actions']['#attributes']['class'])) !== FALSE) {
+ unset($form['actions']['#attributes']['class'][$key]);
+ }
+ $form['actions']['#attributes']['class'][] = 'media-library-view--form-actions';
+ return $form;
+}
+
+/**
+ * Implements hook_views_query_alter().
+ *
+ * Alters the widget view's query to only show media that can be selected,
+ * based on what types are allowed in the field settings.
+ *
+ * @todo Remove in https://www.drupal.org/node/2983454
+ */
+function media_library_views_query_alter(ViewExecutable $view, QueryPluginBase $query) {
+ if ($query instanceof Sql && $view->id() === 'media_library' && $view->current_display === 'widget') {
+ $types = _media_library_get_allowed_types();
+ if ($types) {
+ $entity_type = \Drupal::entityTypeManager()->getDefinition('media');
+ $group = $query->setWhereGroup();
+ $query->addWhere($group, $entity_type->getDataTable() . '.' . $entity_type->getKey('bundle'), $types, 'in');
+ }
+ }
+}
+
+/**
+ * Implements hook_form_FORM_ID_alter().
+ *
+ * Limits the types available in the exposed filter to avoid users trying to
+ * filter by a type that is un-selectable.
+ *
+ * @see media_library_views_query_alter()
+ *
+ * @todo Remove in https://www.drupal.org/node/2983454
+ */
+function media_library_form_views_exposed_form_alter(array &$form, FormStateInterface $form_state) {
+ if (isset($form['#id']) && $form['#id'] === 'views-exposed-form-media-library-widget') {
+ $types = _media_library_get_allowed_types();
+ if ($types && isset($form['type']['#options'])) {
+ $keys = array_flip($types);
+ // Ensure that the default value (by default "All") persists.
+ if (isset($form['type']['#default_value'])) {
+ $keys[$form['type']['#default_value']] = TRUE;
+ }
+ $form['type']['#options'] = array_intersect_key($form['type']['#options'], $keys);
+ }
+ }
+}
+
+/**
+ * Implements hook_field_ui_preconfigured_options_alter().
+ */
+function media_library_field_ui_preconfigured_options_alter(array &$options, $field_type) {
+ // If the field is not an "entity_reference"-based field, bail out.
+ $class = \Drupal::service('plugin.manager.field.field_type')->getPluginClass($field_type);
+ if (!is_a($class, EntityReferenceItem::class, TRUE)) {
+ return;
+ }
+
+ // Set the default field widget for media to be the Media library.
+ if (!empty($options['media'])) {
+ $options['media']['entity_form_display']['type'] = 'media_library_widget';
+ }
+}
+
+/**
+ * Implements hook_local_tasks_alter().
+ *
+ * Removes tasks for the Media library if the view display no longer exists.
+ */
+function media_library_local_tasks_alter(&$local_tasks) {
+ /** @var \Symfony\Component\Routing\RouteCollection $route_collection */
+ $route_collection = \Drupal::service('router')->getRouteCollection();
+ foreach (['media_library.grid', 'media_library.table'] as $key) {
+ if (isset($local_tasks[$key]) && !$route_collection->get($local_tasks[$key]['route_name'])) {
+ unset($local_tasks[$key]);
+ }
+ }
+}
+
+/**
+ * Determines what types are allowed based on the current request.
+ *
+ * @return array
+ * An array of allowed types.
+ */
+function _media_library_get_allowed_types() {
+ $types = \Drupal::request()->query->get('media_library_allowed_types');
+ if ($types && is_array($types)) {
+ return array_filter($types, 'is_string');
+ }
+ return [];
+}