5 * Contains metatag_page_manager.module.
8 use Drupal\Core\Routing\RouteMatchInterface;
9 use Drupal\Core\Form\FormStateInterface;
10 use Drupal\page_manager\Entity\PageVariant;
11 use Drupal\metatag\Entity\MetatagDefaults;
14 * Implements hook_form_FORM_ID_alter().
16 function metatag_page_manager_form_metatag_defaults_add_form_alter(&$form, FormStateInterface $form_state, $form_id) {
17 $variants_options['Page Variants'] = _metatag_page_manager_get_variants();
18 $form['id']['#options'] = array_merge($form['id']['#options'], $variants_options);
22 * Implements hook_page_attachments().
24 function metatag_page_manager_page_attachments(array &$attachments) {
25 // Fetch entity from request.
26 $entity = \Drupal::request()->attributes->get('_entity');
29 $key = $entity->getEntityType()->id() . '__' . $entity->id();
30 // Get default metatags.
31 $metatag_defaults = metatag_get_default_tags();
32 // Load page variant metatags.
33 $metatag_variant = MetatagDefaults::load($key);
34 if ($metatag_variant) {
35 // Overwrite the metatag defaults with the tags of the page variant.
36 $metatag_defaults = array_merge($metatag_defaults, $metatag_variant->get('tags'));
38 // Set the metatag in the static metatag attachments parameter so the
39 // metatag module wouldn't overwrite them.
40 $metatag_attachments = &drupal_static('metatag_attachments');
42 $metatag_manager = \Drupal::service('metatag.manager');
43 $metatag_attachments = $metatag_manager->generateElements($metatag_defaults, $entity);
45 // If any Metatag items were found, append them.
46 if (!empty($metatag_attachments['#attached']['html_head'])) {
47 if (empty($attachments['#attached'])) {
48 $attachments['#attached'] = [];
50 if (empty($attachments['#attached']['html_head'])) {
51 $attachments['#attached']['html_head'] = [];
53 foreach ($metatag_attachments['#attached']['html_head'] as $item) {
54 $attachments['#attached']['html_head'][] = $item;
62 * Returns all available page variants.
65 * A list of page variants keyed by label.
67 function _metatag_page_manager_get_variants() {
68 /** @var \Drupal\page_manager\Entity\PageVariant[] $variants */
69 $variants = PageVariant::loadMultiple();
70 $variant_options = [];
71 // Load all metatag defaults so we can filter the variants which already have
72 // a metatag default configured.
73 $metatag_defaults = MetatagDefaults::loadMultiple();
74 foreach ($variants as $key => $variant) {
75 $id = $variant->getEntityType()->id() . '__' . $key;
76 if (!isset($metatag_defaults[$id])) {
77 $label = $variant->getPage()->label() . ' : ' . $variant->label();
78 $variant_options[$id] = $label;
81 return $variant_options;
85 * Implements hook_metatag_alter().
87 function metatag_page_manager_metatags_alter(array &$metatags, array &$context) {
88 if (!$context['entity'] instanceof PageVariant) {
92 $key = $context['entity']->getEntityType()->id() . '__' . $context['entity']->id();
93 $metatag_variant = MetatagDefaults::load($key);
94 if ($metatag_variant) {
95 $metatags = array_merge($metatags, $metatag_variant->get('tags'));
100 * Implements hook_metatag_route_entity().
102 function metatag_page_manager_metatag_route_entity(RouteMatchInterface $route_match) {
103 if ($variant = $route_match->getParameter('page_manager_page_variant')) {