How can we get Block Bundle Type for block in code?

Question

I am trying to override block content by using hook_preprocess_block(&$variables). I was expecting to find bundle type in $variable, but not getting anything related to this.

Here is kint display of $variable inside the function -

More Info - This is a block type (say content_slider) created from Drupal UI & a block (say content_slider_homepage) is added.

Answer 1

The UUID from the custom block is in the variable derivative_plugin_id. You can use this UUID to load the block and get the bundle:

$block = \Drupal::service('entity.repository')->loadEntityByUuid('block_content', $uuid);

if ($block) {
  $block_type = $block->bundle();
}

Or look in $variables['elements']. Here you'll find the custom block entity loaded in the variables and probably the block type as well. You can also use hook_block_content_view() if this is for a module. See the comments from @Berdir.

Answer 2

This is how I would do it:

use \Drupal\block_content\BlockContentInterface;


/**
 * Implements HOOK_preprocess_block().
 *
 * @param $variables
 */
function mymodule_preprocess_block(&$variables) {
  $content = $variables['elements']['content'];
  if (isset($content['#block_content']) && $content['#block_content'] instanceof BlockContentInterface) {

    if ($content['#block_content']->bundle() == 'xxx') {
      // ...
    }

  }
}