ViewContent.php

<?php

namespace Drupal\quicktabs\Plugin\TabType;

use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Ajax\AjaxResponse;
use Drupal\Core\Ajax\ReplaceCommand;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\quicktabs\TabTypeBase;
use Drupal\views\Views;

/**
 * Provides a 'view content' tab type.
 *
 * @TabType(
 *   id = "view_content",
 *   name = @Translation("view"),
 * )
 */
class ViewContent extends TabTypeBase {
    use StringTranslationTrait;
    
    /**
     * {@inheritdoc}
     */
    public function optionsForm(array $tab) {
        $plugin_id = $this->getPluginDefinition()['id'];
        $views = $this->getViews();
        $views_keys = array_keys($views);
        $selected_view = isset($tab['content'][$plugin_id]['options']['vid']) ? $tab['content'][$plugin_id]['options']['vid'] : (isset($views_keys[0]) ? $views_keys[0] : '');
        $form = [];
        $form['vid'] = [
            '#type' => 'select',
            '#options' => $views,
            '#default_value' => $selected_view,
            '#title' => $this->t('Select a view'),
            '#ajax' => [
                'callback' => [
                    static::class,
                    'viewsDisplaysAjaxCallback',
                ],
                'event' => 'change',
                'progress' => [
                    'type' => 'throbber',
                    'message' => 'Please wait...',
                ],
                'effect' => 'fade',
            ],
        ];
        $form['display'] = [
            '#type' => 'select',
            '#title' => 'display',
            '#options' => ViewContent::getViewDisplays($selected_view),
            '#default_value' => isset($tab['content'][$plugin_id]['options']['display']) ? $tab['content'][$plugin_id]['options']['display'] : '',
            '#prefix' => '<div id="view-display-dropdown-' . $tab['delta'] . '">',
            '#suffix' => '</div>',
        ];
        $form['args'] = [
            '#type' => 'textfield',
            '#title' => 'arguments',
            '#size' => '40',
            '#required' => FALSE,
            '#default_value' => isset($tab['content'][$plugin_id]['options']['args']) ? $tab['content'][$plugin_id]['options']['args'] : '',
            '#description' => $this->t('Additional arguments to send to the view as if they were part of the URL in the form of arg1/arg2/arg3. You may use %1, %2, ..., %N to grab arguments from the URL.'),
        ];
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function render(array $tab) {
        $options = $tab['content'][$tab['type']]['options'];
        $args = empty($options['args']) ? [] : array_map('trim', explode('/', $options['args']));
        if (isset($args)) {
            $current_path = \Drupal::service('path.current')->getPath();
            // If the request is a ajax callback we need to use $_SERVER['HTTP_REFERER'] to get current path.
            if (strpos($current_path, '/quicktabs/ajax/') !== FALSE) {
                $request = \Drupal::request();
                if ($request->server
                    ->get('HTTP_REFERER')) {
                    $referer = parse_url($request->server
                        ->get('HTTP_REFERER'), PHP_URL_PATH);
                    // Stripping the language path prefix.
                    $current_language = \Drupal::service('language_manager')->getCurrentLanguage()
                        ->getId();
                    $path = str_replace("/{$current_language}/", '/', $referer);
                    $current_path = \Drupal::service('path_alias.manager')->getPathByAlias($path);
                }
            }
            $url_args = explode('/', $current_path);
            foreach ($url_args as $id => $arg) {
                $args = str_replace("%{$id}", $arg, $args);
            }
            $args = preg_replace(',/?(%\\d),', '', $args);
        }
        $view = Views::getView($options['vid']);
        // Return empty render array if user doesn't have access.
        if (!$view->access($options['display'], \Drupal::currentUser())) {
            return [];
        }
        // Return empty if the view is empty.
        $view_results = views_get_view_result($options['vid'], $options['display']);
        if (!$view_results && !empty($options['vid']) && !empty($options['display'])) {
            // If the initial view is empty, check the attachments.
            $view = Views::getView($options['vid']);
            $view->setDisplay($options['display']);
            $display = $view->getDisplay();
            $attachments = $display->getAttachedDisplays();
            // If there are attachments, check if they are empty.
            if (!empty($attachments)) {
                foreach ($attachments as $attachment) {
                    if (!empty(views_get_view_result($options['vid'], $attachment))) {
                        $view_results = TRUE;
                        continue;
                    }
                }
            }
        }
        if (empty($view_results)) {
            return [];
        }
        else {
            $render = $view->buildRenderable($options['display'], $args);
        }
        // Set additional cache keys that depend on the arguments provided for this
        // view.
        // Until this is fixed in core:
        // https://www.drupal.org/project/drupal/issues/2823914
        $render['#cache']['keys'] = array_merge($render['#cache']['keys'], $args);
        return $render;
    }
    
    /**
     * Ajax callback to change views displays when view is selected.
     */
    public static function viewsDisplaysAjaxCallback(array &$form, FormStateInterface $form_state) {
        $tab_index = $form_state->getTriggeringElement()['#array_parents'][2];
        $element_id = '#view-display-dropdown-' . $tab_index;
        $ajax_response = new AjaxResponse();
        $ajax_response->addCommand(new ReplaceCommand($element_id, $form['configuration_data_wrapper']['configuration_data'][$tab_index]['content']['view_content']['options']['display']));
        return $ajax_response;
    }
    
    /**
     * Get list of enabled views.
     */
    private function getViews() {
        $views = [];
        foreach (Views::getEnabledViews() as $view_name => $view) {
            $views[$view_name] = $view->label() . ' (' . $view_name . ')';
        }
        ksort($views);
        return $views;
    }
    
    /**
     * Get displays for a given view.
     */
    public function getViewDisplays($view_name) {
        $displays = [];
        if (empty($view_name)) {
            return $displays;
        }
        $view = \Drupal::entityTypeManager()->getStorage('view')
            ->load($view_name);
        if (!$view) {
            return $displays;
        }
        foreach ($view->get('display') as $id => $display) {
            $enabled = !empty($display['display_options']['enabled']) || !array_key_exists('enabled', $display['display_options']);
            if ($enabled) {
                $displays[$id] = $id . ': ' . $display['display_title'];
            }
        }
        return $displays;
    }

}