ixm_blocks-1.0.x-dev/ixm_blocks.module

<?php

/**
 * @file
 * IXM Blocks module.
 */

use Drupal\block_content\BlockContentInterface;

/**
 * Implements hook_theme_suggestions_block_alter().
 */
function ixm_blocks_theme_suggestions_block_alter(array &$suggestions, array $variables) {
  $content = $variables['elements']['content'];
  if (isset($content['#block_content']) && $content['#block_content'] instanceof BlockContentInterface) {
    // Add 'block--BLOCK-TYPE.html.twig'.
    $block_type_suggestions[] = 'block__' . $content['#block_content']->bundle();

    // Add 'block--BLOCK-TYPE--VIEW-MODE.html.twig'.
    $block_type_suggestions[] = 'block__' . $content['#block_content']->bundle() . '__' . $content['#view_mode'];

    // Because block__block_content exists twice in $suggestions,
    // the suggestion arrays are reversed for further processing.
    $suggestions_rev = array_reverse($suggestions);
    $block_type_suggestions = array_reverse($block_type_suggestions);

    // Insert the block type and view mode suggestions between
    // block__block_content and the block instance-specific suggestions.
    $index = array_search('block__block_content', $suggestions_rev);
    if (is_numeric($index)) {
      array_splice($suggestions_rev, $index, 0, $block_type_suggestions);
      $suggestions = array_reverse($suggestions_rev);
    }
    // If block__block_content isn't present as a suggestion.
    else {
      $suggestions_rev = array_merge($suggestions_rev, $block_type_suggestions);
      $suggestions = array_reverse($suggestions_rev);
    }
  }
}