<?php

/**
 * @file
 */

use Drupal\Component\Utility\Xss;
use Drupal\Core\Url;
use Drupal\views\ViewExecutable;

/**
 * Implements hook_preprocess_HOOK() for views templates.
 */
function views_ui_preprocess_views_view(&$variables): void {
  $view = $variables['view'];

  // Render title for the admin preview.
  if (!empty($view->live_preview)) {
    $variables['title'] = [
      '#markup' => $view->getTitle(),
      '#allowed_tags' => Xss::getHtmlTagList(),
    ];
  }

  if (!empty($view->live_preview) && \Drupal::moduleHandler()->moduleExists('contextual')) {
    $view->setShowAdminLinks(FALSE);
    foreach (['title', 'header', 'exposed', 'rows', 'pager', 'more', 'footer', 'empty', 'attachment_after', 'attachment_before'] as $section) {
      if (!empty($variables[$section])) {
        $variables[$section] = [
          '#theme' => 'views_ui_view_preview_section',
          '#view' => $view,
          '#section' => $section,
          '#content' => $variables[$section],
          '#theme_wrappers' => ['views_ui_container'],
          '#attributes' => ['class' => ['contextual-region']],
        ];
      }
    }
  }
}

/**
 * Implements hook_theme_suggestions_HOOK().
 */
function views_ui_theme_suggestions_views_ui_view_preview_section(array $variables): array {
  return ['views_ui_view_preview_section__' . $variables['section']];
}

/**
 * Returns contextual links for each handler of a certain section.
 *
 * @todo Bring in relationships.
 * @todo Refactor this function to use much stuff of
 *    views_ui_edit_form_get_bucket.
 *
 * @param string $title
 *   Add a bolded title of this section.
 */
function views_ui_view_preview_section_handler_links(ViewExecutable $view, $type, $title = FALSE): array {
  $display = $view->display_handler->display;
  $handlers = $view->display_handler->getHandlers($type);
  $links = [];

  $types = ViewExecutable::getHandlerTypes();
  if ($title) {
    $links[$type . '-title'] = [
      'title' => $types[$type]['title'],
    ];
  }

  foreach ($handlers as $id => $handler) {
    $field_name = $handler->adminLabel(TRUE);
    $links[$type . '-edit-' . $id] = [
      'title' => t('Edit @section', ['@section' => $field_name]),
      'url' => Url::fromRoute('views_ui.form_handler', ['js' => 'nojs', 'view' => $view->storage->id(), 'display_id' => $display['id'], 'type' => $type, 'id' => $id]),
      'attributes' => ['class' => ['views-ajax-link']],
    ];
  }
  $links[$type . '-add'] = [
    'title' => t('Add new'),
    'url' => Url::fromRoute('views_ui.form_add_handler', ['js' => 'nojs', 'view' => $view->storage->id(), 'display_id' => $display['id'], 'type' => $type]),
    'attributes' => ['class' => ['views-ajax-link']],
  ];

  return $links;
}

/**
 * Returns a link to editing a certain display setting.
 */
function views_ui_view_preview_section_display_category_links(ViewExecutable $view, $type, $title): array {
  $display = $view->display_handler->display;
  $links = [
    $type . '-edit' => [
      'title' => t('Edit @section', ['@section' => $title]),
      'url' => Url::fromRoute('views_ui.form_display', ['js' => 'nojs', 'view' => $view->storage->id(), 'display_id' => $display['id'], 'type' => $type]),
      'attributes' => ['class' => ['views-ajax-link']],
    ],
  ];

  return $links;
}

/**
 * Returns all contextual links for the main content part of the view.
 */
function views_ui_view_preview_section_rows_links(ViewExecutable $view): array {
  $links = [];
  $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'filter', TRUE));
  $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'field', TRUE));
  $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'sort', TRUE));
  $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'argument', TRUE));
  $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'relationship', TRUE));

  return $links;
}

/**
 * Sets a static variable for controlling whether contextual links are rendered.
 *
 * @see views_ui_contextual_links_view_alter()
 */
function views_ui_contextual_links_suppress($set = NULL) {
  $suppress = &drupal_static(__FUNCTION__);
  if (isset($set)) {
    $suppress = $set;
  }
  return $suppress;
}

/**
 * Increments the views_ui_contextual_links_suppress() static variable.
 *
 * When this function is added to the #pre_render of an element, and
 * 'views_ui_contextual_links_suppress_pop' is added to the #post_render of the
 * same element, then all contextual links within the element and its
 * descendants are suppressed from being rendered. This is used, for example,
 * during a View preview, when it is not desired for nodes in the Views result
 * to have contextual links.
 *
 * @see views_ui_contextual_links_suppress_pop()
 */
function views_ui_contextual_links_suppress_push(): void {
  views_ui_contextual_links_suppress(((int) views_ui_contextual_links_suppress()) + 1);
}

/**
 * Decrements the views_ui_contextual_links_suppress() static variable.
 *
 * @see views_ui_contextual_links_suppress_push()
 */
function views_ui_contextual_links_suppress_pop(): void {
  views_ui_contextual_links_suppress(((int) views_ui_contextual_links_suppress()) - 1);
}