<?php

/**
 * @file
 * Functions to support theming in the Seven theme.
 */

use Drupal\Component\Utility\Html;
use Drupal\Core\Url;
use Drupal\Core\Form\FormStateInterface;
use Drupal\media\MediaForm;
use Drupal\views\Form\ViewsForm;
use Drupal\views\ViewExecutable;

/**
 * Implements hook_preprocess_HOOK() for HTML document templates.
 */
function seven_preprocess_html(&$variables) {
  // If on a node add or edit page, add a node-layout class.
  $path_args = explode('/', \Drupal::request()->getPathInfo());
  if ($suggestions = theme_get_suggestions($path_args, 'page', '-')) {
    foreach ($suggestions as $suggestion) {
      if ($suggestion === 'page-node-edit' || strpos($suggestion, 'page-node-add') !== FALSE) {
        $variables['attributes']['class'][] = 'node-form-layout';
      }
    }
  }
}

/**
 * Implements hook_preprocess_HOOK() for menu-local-tasks templates.
 *
 * Use preprocess hook to set #attached to child elements because they will be
 * processed by Twig and \Drupal::service('renderer')->render() will be invoked.
 */
function seven_preprocess_menu_local_tasks(&$variables) {
  if (!empty($variables['primary'])) {
    $variables['primary']['#attached'] = [
      'library' => [
        'seven/drupal.nav-tabs',
      ],
    ];
  }
  elseif (!empty($variables['secondary'])) {
    $variables['secondary']['#attached'] = [
      'library' => [
        'seven/drupal.nav-tabs',
      ],
    ];
  }
}

/**
 * Implements hook_preprocess_HOOK() for menu-local-task templates.
 */
function seven_preprocess_menu_local_task(&$variables) {
  $variables['attributes']['class'][] = 'tabs__tab';
}

/**
 * Implements hook_preprocess_HOOK() for list of available node type templates.
 */
function seven_preprocess_node_add_list(&$variables) {
  if (!empty($variables['content'])) {
    /** @var \Drupal\node\NodeTypeInterface $type */
    foreach ($variables['content'] as $type) {
      $variables['types'][$type->id()]['label'] = $type->label();
      $variables['types'][$type->id()]['url'] = Url::fromRoute('node.add', ['node_type' => $type->id()])->toString();
    }
  }
}

/**
 * Implements hook_preprocess_HOOK() for block content add list templates.
 *
 * Displays the list of available custom block types for creation, adding
 * separate variables for the label and url.
 */
function seven_preprocess_block_content_add_list(&$variables) {
  if (!empty($variables['content'])) {
    foreach ($variables['content'] as $type) {
      $variables['types'][$type->id()]['label'] = $type->label();
      $options = ['query' => \Drupal::request()->query->all()];
      $variables['types'][$type->id()]['url'] = Url::fromRoute('block_content.add_form', ['block_content_type' => $type->id()], $options)->toString();
    }
  }
}

/**
 * Implements hook_preprocess_block() for block content.
 *
 * Disables contextual links for all blocks except for layout builder blocks.
 */
function seven_preprocess_block(&$variables) {
  if (isset($variables['title_suffix']['contextual_links']) && !isset($variables['elements']['#contextual_links']['layout_builder_block'])) {
    unset($variables['title_suffix']['contextual_links']);
    unset($variables['elements']['#contextual_links']);

    $variables['attributes']['class'] = array_diff($variables['attributes']['class'], ['contextual-region']);
  }
}

/**
 * Implements hook_preprocess_HOOK() for block admin page templates.
 */
function seven_preprocess_admin_block_content(&$variables) {
  if (!empty($variables['content'])) {
    foreach ($variables['content'] as $key => $item) {
      $variables['content'][$key]['url'] = $item['url']->toString();
    }
  }
}

/**
 * Implements hook_preprocess_HOOK() for menu-local-action templates.
 */
function seven_preprocess_menu_local_action(array &$variables) {
  $variables['link']['#options']['attributes']['class'][] = 'button--primary';
  $variables['link']['#options']['attributes']['class'][] = 'button--small';

  // We require Modernizr's touch test for button styling.
  $variables['#attached']['library'][] = 'core/modernizr';
}

/**
 * Implements hook_element_info_alter().
 */
function seven_element_info_alter(&$type) {
  // We require Modernizr for button styling.
  if (isset($type['button'])) {
    $type['button']['#attached']['library'][] = 'core/modernizr';
  }
}

/**
 * Implements hook_preprocess_install_page().
 */
function seven_preprocess_install_page(&$variables) {
  // Seven has custom styling for the install page.
  $variables['#attached']['library'][] = 'seven/install-page';
}

/**
 * Implements hook_preprocess_maintenance_page().
 */
function seven_preprocess_maintenance_page(&$variables) {
  // Seven has custom styling for the maintenance page.
  $variables['#attached']['library'][] = 'seven/maintenance-page';
}

/**
 * Implements hook_form_BASE_FORM_ID_alter() for \Drupal\node\NodeForm.
 *
 * Changes vertical tabs to container.
 */
function seven_form_node_form_alter(&$form, FormStateInterface $form_state) {
  $form['#theme'] = ['node_edit_form'];
  $form['#attached']['library'][] = 'seven/node-form';

  $form['advanced']['#type'] = 'container';
  $form['meta']['#type'] = 'container';
  $form['meta']['#access'] = TRUE;
  $form['meta']['changed']['#wrapper_attributes']['class'][] = 'container-inline';
  $form['meta']['author']['#wrapper_attributes']['class'][] = 'container-inline';

  $form['revision_information']['#type'] = 'container';
  $form['revision_information']['#group'] = 'meta';
}

/**
 * Implements hook_form_BASE_FORM_ID_alter() for \Drupal\media\MediaForm.
 */
function seven_form_media_form_alter(&$form, FormStateInterface $form_state) {
  // Only attach CSS from core if this form comes from Media core, and not from
  // the contrib Media Entity 1.x branch.
  if (\Drupal::moduleHandler()->moduleExists('media') && $form_state->getFormObject() instanceof MediaForm) {
    // @todo Revisit after https://www.drupal.org/node/2892304 is in. It
    // introduces a footer region to these forms which will allow for us to
    // display a top border over the published checkbox by defining a
    // media-edit-form.html.twig template the same way node does.
    $form['#attached']['library'][] = 'seven/media-form';
  }
}

/**
 * Implements hook_form_FORM_ID_alter() for language_content_settings_form().
 */
function seven_form_language_content_settings_form_alter(array &$form, FormStateInterface $form_state) {
  $form['#attached']['library'][] = 'seven/layout_builder_content_translation_admin';
}

/**
 * Implements hook_preprocess_views_view_fields().
 *
 * This targets each rendered media item in the grid display of the media
 * library's modal dialog.
 */
function seven_preprocess_views_view_fields__media_library(array &$variables) {
  // Add classes to media rendered entity field so it can be targeted for
  // styling. Adding this class in a template is very difficult to do.
  if (isset($variables['fields']['rendered_entity']->wrapper_attributes)) {
    $variables['fields']['rendered_entity']->wrapper_attributes->addClass('media-library-item__click-to-select-trigger');
  }
}

/**
 * Implements hook_form_alter().
 */
function seven_form_alter(array &$form, FormStateInterface $form_state, $form_id) {
  $form_object = $form_state->getFormObject();
  if ($form_object instanceof ViewsForm && strpos($form_object->getBaseFormId(), 'views_form_media_library') === 0) {
    if (isset($form['header'])) {
      $form['header']['#attributes']['class'][] = 'media-library-views-form__header';
      $form['header']['media_bulk_form']['#attributes']['class'][] = 'media-library-views-form__bulk_form';
    }
    $form['actions']['submit']['#attributes']['class'] = ['media-library-select'];

    // This conditional exists because the media-library-views-form class is
    // currently added by Classy, but Seven will eventually not use Classy as a
    // base theme.
    // @todo remove conditional, keep class addition in
    //   https://drupal.org/node/3110137
    // @see https://www.drupal.org/node/3109287
    // @see classy_form_alter()
    if (!isset($form['#attributes']['class']) || !in_array('media-library-views-form', $form['#attributes']['class'])) {
      $form['#attributes']['class'][] = 'media-library-views-form';
    }
  }
  // Add after build to add a CSS class to the form actions.
  if ($form_id === 'views_exposed_form' && strpos($form['#id'], 'views-exposed-form-media-library-widget') === 0) {
    $form['actions']['#attributes']['class'][] = 'media-library-view--form-actions';
  }
}

/**
 * Implements hook_form_BASE_FORM_ID_alter().
 */
function seven_form_media_library_add_form_alter(array &$form, FormStateInterface $form_state) {
  $form['#attributes']['class'][] = 'media-library-add-form';
  $form['#attached']['library'][] = 'seven/media_library';

  // If there are unsaved media items, apply styling classes to various parts
  // of the form.
  if (isset($form['media'])) {
    $form['#attributes']['class'][] = 'media-library-add-form--with-input';

    // Put a wrapper around the informational message above the unsaved media
    // items.
    $form['description']['#template'] = '<p class="media-library-add-form__description">{{ text }}</p>';
  }
  else {
    $form['#attributes']['class'][] = 'media-library-add-form--without-input';
  }
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function seven_form_media_library_add_form_upload_alter(array &$form, FormStateInterface $form_state) {
  $form['#attributes']['class'][] = 'media-library-add-form--upload';

  if (isset($form['container'])) {
    $form['container']['#attributes']['class'][] = 'media-library-add-form__input-wrapper';
  }
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function seven_form_media_library_add_form_oembed_alter(array &$form, FormStateInterface $form_state) {
  $form['#attributes']['class'][] = 'media-library-add-form--oembed';

  // If no media items have been added yet, add a couple of styling classes
  // to the initial URL form.
  if (isset($form['container'])) {
    $form['container']['#attributes']['class'][] = 'media-library-add-form__input-wrapper';
    $form['container']['url']['#attributes']['class'][] = 'media-library-add-form-oembed-url';
    $form['container']['submit']['#attributes']['class'][] = 'media-library-add-form-oembed-submit';
  }
}

/**
 * Implements hook_preprocess_item_list__media_library_add_form_media_list().
 *
 * This targets each new, unsaved media item added to the media library, before
 * they are saved.
 */
function seven_preprocess_item_list__media_library_add_form_media_list(array &$variables) {
  foreach ($variables['items'] as &$item) {
    $item['value']['preview']['#attributes']['class'][] = 'media-library-add-form__preview';
    $item['value']['fields']['#attributes']['class'][] = 'media-library-add-form__fields';
    $item['value']['remove_button']['#attributes']['class'][] = 'media-library-add-form__remove-button';

    // #source_field_name is set by AddFormBase::buildEntityFormElement()
    // to help themes and form_alter hooks identify the source field.
    $fields = &$item['value']['fields'];
    $source_field_name = $fields['#source_field_name'];
    if (isset($fields[$source_field_name])) {
      $fields[$source_field_name]['#attributes']['class'][] = 'media-library-add-form__source-field';
    }
  }
}

/**
 * Implements hook_preprocess_media_library_item__widget().
 *
 * This targets each media item selected in an entity reference field.
 */
function seven_preprocess_media_library_item__widget(array &$variables) {
  $variables['content']['remove_button']['#attributes']['class'][] = 'media-library-item__remove';
}

/**
 * Implements hook_preprocess_media_library_item__small().
 *
 * This targets each pre-selected media item selected when adding new media in
 * the modal media library dialog.
 */
function seven_preprocess_media_library_item__small(array &$variables) {
  $variables['content']['select']['#attributes']['class'][] = 'media-library-item__click-to-select-checkbox';
}

/**
 * @todo Remove this when https://www.drupal.org/project/drupal/issues/2999549
 * lands.
 *
 * @see \Drupal\media_library\Plugin\Field\FieldWidget\MediaLibraryWidget::formElement()
 */
function seven_preprocess_fieldset__media_library_widget(array &$variables) {
  if (isset($variables['prefix']['weight_toggle'])) {
    $variables['prefix']['weight_toggle']['#attributes']['class'][] = 'media-library-widget__toggle-weight';
  }
  if (isset($variables['suffix']['open_button'])) {
    $variables['suffix']['open_button']['#attributes']['class'][] = 'media-library-open-button';
  }
}

/**
 * Implements hook_views_pre_render().
 */
function seven_views_pre_render(ViewExecutable $view) {
  $add_classes = function (&$option, array $classes_to_add) {
    $classes = preg_split('/\s+/', $option);
    $classes = array_filter($classes);
    $classes = array_merge($classes, $classes_to_add);
    $option = implode(' ', array_unique($classes));
  };

  if ($view->id() === 'media_library') {
    if ($view->display_handler->options['defaults']['css_class']) {
      $add_classes($view->displayHandlers->get('default')->options['css_class'], ['media-library-view']);
    }
    else {
      $add_classes($view->display_handler->options['css_class'], ['media-library-view']);
    }

    if ($view->current_display === 'page') {
      if (array_key_exists('media_bulk_form', $view->field)) {
        $add_classes($view->field['media_bulk_form']->options['element_class'], ['media-library-item__click-to-select-checkbox']);
      }
      if (array_key_exists('rendered_entity', $view->field)) {
        $add_classes($view->field['rendered_entity']->options['element_class'], ['media-library-item__content']);
      }
      if (array_key_exists('edit_media', $view->field)) {
        $add_classes($view->field['edit_media']->options['alter']['link_class'], ['media-library-item__edit']);
      }
      if (array_key_exists('delete_media', $view->field)) {
        $add_classes($view->field['delete_media']->options['alter']['link_class'], ['media-library-item__remove']);
      }
    }
    elseif (strpos($view->current_display, 'widget') === 0) {
      if (array_key_exists('rendered_entity', $view->field)) {
        $add_classes($view->field['rendered_entity']->options['element_class'], ['media-library-item__content']);
      }
      if (array_key_exists('media_library_select_form', $view->field)) {
        $add_classes($view->field['media_library_select_form']->options['element_wrapper_class'], ['media-library-item__click-to-select-checkbox']);
      }

      if ($view->display_handler->options['defaults']['css_class']) {
        $add_classes($view->displayHandlers->get('default')->options['css_class'], ['media-library-view--widget']);
      }
      else {
        $add_classes($view->display_handler->options['css_class'], ['media-library-view--widget']);
      }
    }
  }
}

/**
 * Implements hook_preprocess_links__media_library_menu().
 *
 * This targets the menu of available media types in the media library's modal
 * dialog.
 *
 * @todo Do this in the relevant template once
 *   https://www.drupal.org/project/drupal/issues/3088856 is resolved.
 * @todo revisit in https://drupal.org/node/3110132
 */
function seven_preprocess_links__media_library_menu(array &$variables) {
  foreach ($variables['links'] as &$link) {
    // This conditional exists because the media-library-menu__link class is
    // currently added by Classy, but Seven will eventually not use Classy as a
    // base theme.
    // @todo remove conditional, keep class addition in
    //   https://drupal.org/node/3110137
    // @see https://www.drupal.org/node/3109287
    // @see classy_preprocess_links__media_library_menu()
    if (!isset($link['link']['#options']['attributes']['class']) || !in_array('media-library-menu__link', $link['link']['#options']['attributes']['class'])) {
      $link['link']['#options']['attributes']['class'][] = 'media-library-menu__link';
    }
  }
}

/**
 * Implements hook_preprocess_image_widget().
 */
function seven_preprocess_image_widget(array &$variables) {
  $data = &$variables['data'];

  // This prevents image widget templates from rendering preview container HTML
  // to users that do not have permission to access these previews.
  // @todo revisit in https://drupal.org/node/953034
  // @todo revisit in https://drupal.org/node/3114318
  if (isset($data['preview']['#access']) && $data['preview']['#access'] === FALSE) {
    unset($data['preview']);
  }

  // @todo Revisit everything in this conditional in
  //   https://drupal.org/node/3117430
  if (!empty($variables['element']['fids']['#value'])) {
    $file = reset($variables['element']['#files']);
    $data["file_{$file->id()}"]['filename']['#suffix'] = ' <span class="file-size">(' . format_size($file->getSize()) . ')</span> ';
  }
}

/**
 * Prepares variables for update version templates.
 *
 * Default template: update-version.html.twig.
 *
 * @param array $variables
 *   An associative array containing:
 *   - version: An array of information about the release version.
 */
function seven_preprocess_update_version(array &$variables) {
  $variables['#attached']['library'][] = 'seven/update-report';
}

/**
 * Implements template_preprocess_links().
 *
 * This makes it so array keys of #links items are added as a class. This
 * functionality was removed in Drupal 8.1, but still necessary in some
 * instances.
 *
 * @todo remove in https://drupal.org/node/3120962
 */
function seven_preprocess_links(&$variables) {
  if (!empty($variables['links'])) {
    foreach ($variables['links'] as $key => $value) {
      if (!is_numeric($key)) {
        $class = Html::getClass($key);
        $variables['links'][$key]['attributes']->addClass($class);
      }
    }
  }
}