function BlockViewBuilder::viewMultiple

Overrides EntityViewBuilder::viewMultiple

File

core/modules/block/src/BlockViewBuilder.php, line 39

Class

BlockViewBuilder

Provides a Block view builder.

Namespace

Code

public function viewMultiple(array $entities = [], $view_mode = 'full', $langcode = NULL) {
  /** @var \Drupal\block\BlockInterface[] $entities */
  $build = [];
  foreach ($entities as $entity) {
    $entity_id = $entity->id();
    $plugin = $entity->getPlugin();
    $cache_tags = Cache::mergeTags($this->getCacheTags(), $entity->getCacheTags());
    $cache_tags = Cache::mergeTags($cache_tags, $plugin->getCacheTags());
    // Create the render array for the block as a whole.
    // @see template_preprocess_block().
    $build[$entity_id] = [
      '#cache' => [
        'keys' => [
          'entity_view',
          'block',
          $entity->id(),
        ],
        'contexts' => Cache::mergeContexts($entity->getCacheContexts(), $plugin->getCacheContexts()),
        'tags' => $cache_tags,
        'max-age' => $plugin->getCacheMaxAge(),
      ],
      '#weight' => $entity->getWeight(),
    ];
    // Allow altering of cacheability metadata or setting #create_placeholder.
    $this->moduleHandler
      ->alter([
      'block_build',
      "block_build_" . $plugin->getBaseId(),
    ], $build[$entity_id], $plugin);
    if ($plugin instanceof MainContentBlockPluginInterface || $plugin instanceof TitleBlockPluginInterface) {
      // Immediately build a #pre_render-able block, since this block cannot
      // be built lazily.
      $build[$entity_id] += static::buildPreRenderableBlock($entity, $this->moduleHandler());
    }
    else {
      // Assign a #lazy_builder callback, which will generate a #pre_render-
      // able block lazily (when necessary).
      $build[$entity_id] += [
        '#lazy_builder' => [
          static::class . '::lazyBuilder',
          [
            $entity_id,
            $view_mode,
            $langcode,
          ],
        ],
      ];
    }
  }
  return $build;
}