media_directories-2.x-dev/modules/media_directories_editor/media_directories_editor.module

<?php

/**
 * @file
 * Main module file.
 */

use Drupal\Component\Serialization\Json;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
use Drupal\media\MediaInterface;

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Adding settings to the media_directories config form here.
 */
function media_directories_editor_form_media_directories_config_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  $form['media_directories_editor'] = [
    '#type' => 'details',
    '#title' => t('Editor Settings'),
    '#description' => t("Here you'll find settings regarding the CKEditor integration."),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
    '#tree' => TRUE,
  ];
  $form['media_directories_editor']['directories_button'] = [
    '#type' => 'fieldset',
    '#title' => t('Directories button'),
    '#description' => t('The desired text formats should be given the editor button. You can edit them <a href=":url">here</a>. <em>Make sure to also enable the embed media filter!</em>', [
      ':url' => Url::fromRoute('filter.admin_overview')->toString(),
    ]),
  ];

  $config = \Drupal::configFactory()->get('media_directories_editor.settings');

  $form['media_directories_editor']['embed_dialog'] = [
    '#type' => 'details',
    '#title' => t('Embed dialog'),
    '#description' => t('Extra settings for embed dialog.'),
    '#open' => TRUE,
  ];

  $image_styles = image_style_options(FALSE);

  $form['media_directories_editor']['embed_dialog']['image_styles'] = [
    '#title' => t('Select images styles to use'),
    '#description' => t('Select list of image styles to show in embed dialog. If nothing is selected, all styles will be shown.'),
    '#type' => 'select',
    '#options' => $image_styles,
    '#multiple' => TRUE,
    '#size' => 10,
    '#default_value' => $config->get('embed_dialog.image_styles'),
  ];

  if (!empty($config->get('embed_dialog.image_styles'))) {
    $form['media_directories_editor']['#open'] = TRUE;
  }

  array_unshift($form['#submit'], 'media_directories_editor_config_form_submit');
}

/**
 * Submit handler for media directories config form.
 *
 * @param array $form
 *   The form array.
 * @param \Drupal\Core\Form\FormStateInterface $form_state
 *   The form state object.
 */
function media_directories_editor_config_form_submit(array &$form, FormStateInterface $form_state) {
  \Drupal::configFactory()->getEditable('media_directories_editor.settings')
    ->set('embed_dialog', $form_state->getValue(['media_directories_editor', 'embed_dialog']))
    ->save();
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function media_directories_editor_form_entity_embed_dialog_alter(&$form, FormStateInterface $form_state, $form_id) {
  $storage = $form_state->getStorage();
  /** @var \Drupal\embed\Entity\EmbedButton $embed_button */
  $embed_button = $storage['embed_button'];

  // Make sure we only alter the form for the button defined by our module.
  if ($embed_button->id() == 'media_directories') {

    /** @var \Drupal\media\Entity\Media $entity */
    $entity = $storage['entity'];

    if ($entity instanceof MediaInterface) {
      /** @var \Drupal\file\FileInterface $file */
      $file = $entity->get('thumbnail')->entity;
      $image = [
        '#theme' => 'image_style',
        '#style_name' => 'media_library',
        '#alt' => $entity->label(),
        '#uri' => $file->getFileUri(),
      ];
      $link = [
        '#type' => 'link',
        '#title' => $image,
        '#url' => $entity->toUrl(),
        '#attributes' => [
          'target' => '_blank',
        ],
      ];
      $form['entity']['#title'] = t('Selected item');
      $form['entity']['link'] = $link;
      unset($form['entity']['#markup']);
    }

    if (isset($form['attributes']['data-entity-embed-display-settings']) && $entity->bundle() === 'image') {
      $entity_element = $form_state->get('entity_element');
      if (isset($entity_element['data-entity-embed-display-settings']) && !is_array($entity_element['data-entity-embed-display-settings'])) {
        $entity_element['data-entity-embed-display-settings'] = Json::decode($entity_element['data-entity-embed-display-settings']);
      }
    }

    // Add bundle validation constraint to entity browser.
    if (isset($form['entity_browser'])) {
      $bundles = $embed_button->getTypeSetting('bundles');
      $bundles = array_combine($bundles, $bundles);
      $form['entity_browser']['#entity_browser_validators']['target_bundles'] = ['bundle' => $bundles];
    }
  }
}

/**
 * Implements hook_preprocess_HOOK().
 */
function media_directories_editor_preprocess_entity_embed_container(&$variables) {
  // Remove some attributes we don't need.
  unset($variables['attributes']['data-entity-embed-display-settings']);
  unset($variables['attributes']['data-entity-embed-display']);
  unset($variables['attributes']['data-embed-button']);
}