rocketship_core-8.x-2.0-alpha11/modules/rocketship_seo/rocketship_seo.module

<?php

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

use Drupal\node\NodeInterface;
use Drupal\node\Entity\NodeType;
use Drupal\Core\Form\FormStateInterface;
use Drupal\node\NodeTypeInterface;
use Drupal\Core\Url;

/**
 * Implements hook_preprocess().
 */
function rocketship_seo_preprocess(&$variables, $hook) {
  // @see https://www.drupal.org/project/search_api/issues/3045793
  if (strpos($hook, 'pager') !== 0
    &&
    strpos($hook, 'views_mini_pager') !== 0) {
    return;
  }

  if (!isset($hooks)) {
    $hooks = theme_get_registry();
  }

  // Determine the primary theme function argument.
  if (isset($hooks[$hook]['variables'])) {
    $keys = array_keys($hooks[$hook]['variables']);
    $key = $keys[0];
  }
  else {
    $key = $hooks[$hook]['render element'];
  }

  if (!isset($variables[$key])) {
    return;
  }

  $pager = $variables[$key];

  global $pager_page_array, $pager_total;

  if (empty($pager_page_array)) {
    return;
  }

  $element = $pager['#element'];
  $parameters = $pager['#parameters'];

  $current = $pager_page_array[$element];
  $max = $pager_total[$element];

  /* @var $pager_manager \Drupal\Core\Pager\PagerManagerInterface */
  $pager_manager = \Drupal::service('pager.manager');

  // Add the next, prev, last and first urls as links to the header area.
  if ($current > 0) {
    $item = [
      [
        '#tag' => 'link',
        '#attributes' => [
          'rel' => 'prev',
          'href' => Url::fromRoute('<current>', [], [
            'absolute' => TRUE,
            'query' => $pager_manager->getUpdatedParameters($parameters, $element, $current - 1),
          ])
            ->toString(),
        ],
      ],
      'prev',
    ];
    $variables['#attached']['html_head'][] = $item;
  }
  if ($current < $max) {
    $item = [
      [
        '#tag' => 'link',
        '#attributes' => [
          'rel' => 'next',
          'href' => Url::fromRoute('<current>', [], [
            'absolute' => TRUE,
            'query' => $pager_manager->getUpdatedParameters($parameters, $element, $current + 1),
          ])
            ->toString(),
        ],
      ],
      'next',
    ];
    $variables['#attached']['html_head'][] = $item;
  }

  $item = [
    [
      '#tag' => 'link',
      '#attributes' => [
        'rel' => 'first',
        'href' => Url::fromRoute('<current>', [], [
          'absolute' => TRUE,
          'query' => $pager_manager->getUpdatedParameters($parameters, $element, 0),
        ])
          ->toString(),
      ],
    ],
    'first',
  ];
  $variables['#attached']['html_head'][] = $item;

  $item = [
    [
      '#tag' => 'link',
      '#attributes' => [
        'rel' => 'last',
        'href' => Url::fromRoute('<current>', [], [
          'absolute' => TRUE,
          'query' => $pager_manager->getUpdatedParameters($parameters, $element, $max),
        ])
          ->toString(),
      ],
    ],
    'last',
  ];

  // Attach these to $variables, not the render array.
  $variables['#attached']['html_head'][] = $item;
}

/**
 * Implements hook_form_BASE_FORM_ID_alter().
 *
 * If present, place the description and canonical image fields in the advanced
 * tab on the right hand side of nodes.
 *
 * If you create a CT and don't want this, don't add these fields
 */
function rocketship_seo_form_node_form_alter(&$form, FormStateInterface $form_state, $form_id) {

  /** @var \Drupal\node\NodeInterface $node */
  $node = $form_state->getFormObject()->getEntity();
  $node_type = NodeType::load($node->bundle());

  $fields = $node_type->getThirdPartySetting('rocketship_seo', 'seo_fields', []);

  foreach ($fields as $field) {
    if (isset($form[$field])) {
      if (!isset($form['description_wrapper'])) {
        $title = $node_type
          ->getThirdPartySetting('rocketship_seo', 'seo_title', 'Overview');
        $description = $node_type
          ->getThirdPartySetting(
            'rocketship_seo',
            'seo_description',
            'Content here is displayed on overview pages. Additionally, it is used for search engine and social media snippets. You can further finetune what exactly is used for each snippet in the "Metatags" tab.'
          );
        $form['description_wrapper'] = [
          '#type' => 'details',
          '#title' => t($title),
          '#description' => t($description),
          '#group' => 'advanced',
          '#weight' => -10,
          '#open' => TRUE,
        ];
      }
      $form['description_wrapper'][$field] = $form[$field];
      unset($form[$field]);
    }
  }
}

/**
 * Implements hook_form_BASE_FORM_ID_alter().
 *
 * Add some extra explanation that it's using the fields from the overview tab
 * above it.
 */
function rocketship_seo_field_widget_metatag_firehose_form_alter(&$element, FormStateInterface $form_state, $context) {
  $form_object = $form_state->getFormObject();
  if (!method_exists($form_object, 'getEntity')) {
    return;
  }
  $entity = $form_state->getFormObject()->getEntity();
  if (!$entity instanceof NodeInterface) {
    return;
  }
  $bundle = NodeType::load($entity->bundle());
  $fields = $bundle->getThirdPartySetting('rocketship_seo', 'seo_fields', []);

  foreach ($fields as $field) {
    if (isset($form[$field])) {
      $title = $bundle->getThirdPartySetting('rocketship_seo', 'seo_title', 'Overview');
      // Something is in our description wrapper, we can add our extra
      // explanation.
      $element['intro_text']['#markup'] .= '<p>' . t('For descriptions and images, it uses the values from the fields in the "!title" tab. You can replace these with actual values if you wish to further finetune individual metatags.',
          [
            '!title' => t($title),
          ]) . '</p>';
      return;
    }
  }
}

/**
 * Implements hook_form_FORM_ID_alter() for \Drupal\node\NodeTypeForm.
 *
 * Adds textarea for title field help text to the node type form.
 *
 * @see NodeTypeForm::form()
 * @see rocketship_seo_node_type_form_submit()
 */
function rocketship_seo_form_node_type_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  // Set default value of the help text form element on node type form.
  /** @var \Drupal\node\NodeTypeInterface $node_type */
  $node_type = $form_state->getFormObject()->getEntity();

  $entity_type_id = 'node';
  $bundle = $node_type->id();
  $options = [];

  $field_definitions = \Drupal::service('entity_field.manager')
    ->getFieldDefinitions($entity_type_id, $bundle);

  foreach ($field_definitions as $field_name => $field_definition) {
    if (!empty($field_definition->getTargetBundle())) {
      $options[$field_name] = $field_definition->getLabel();
    }
  }

  $form['rocketship_seo'] = [
    '#type' => 'fieldset',
    '#title' => t('Rocketship SEO'),
    '#weight' => 0,
  ];
  $form['rocketship_seo']['seo_fields'] = [
    '#title' => t('SEO fields'),
    '#type' => 'select',
    '#options' => $options,
    '#multiple' => TRUE,
    '#default_value' => $node_type->getThirdPartySetting('rocketship_seo', 'seo_fields', []),
    '#description' => 'Which fields you wish to place in a special section in the sidebar on node edit forms.',
    '#weight' => 0,
  ];
  $form['rocketship_seo']['seo_title'] = [
    '#title' => t('Details title'),
    '#type' => 'textfield',
    '#default_value' => $node_type->getThirdPartySetting('rocketship_seo', 'seo_title', 'Overview'),
    '#description' => 'The title of the special section in the sidebar.',
    '#weight' => 0,
  ];
  $form['rocketship_seo']['seo_description'] = [
    '#title' => t('Details description'),
    '#type' => 'textarea',
    '#default_value' => $node_type->getThirdPartySetting('rocketship_seo', 'seo_description', 'Content here is displayed on overview pages. Additionally, it is used for search engine and social media snippets. You can further finetune what exactly is used for each snippet in the "Metatags" tab.'),
    '#description' => 'The description for the special section in the sidebar.',
    '#weight' => 0,
  ];

  $form['#entity_builders'][] = 'rocketship_seo_form_node_type_form_builder';
}

/**
 * Entity builder for the node type form.
 *
 * @see rocketship_seo_form_node_type_form_alter()
 */
function rocketship_seo_form_node_type_form_builder($entity_type, NodeTypeInterface $type, &$form, FormStateInterface $form_state) {
  $type->setThirdPartySetting('rocketship_seo', 'seo_fields', $form_state->getValue('seo_fields'));
  $type->setThirdPartySetting('rocketship_seo', 'seo_title', $form_state->getValue('seo_title'));
  $type->setThirdPartySetting('rocketship_seo', 'seo_description', $form_state->getValue('seo_description'));
}