alternate_node_fields.module

<?php
use Drupal\views\ViewExecutable;
use Drupal\Core\Render\BubbleableMetadata;
use Drupal\node\NodeInterface;
use Drupal\node\Entity\Node;
use Drupal\Core\Routing\RouteObjectInterface;

/**
 * Implements hook_views_pre_render().
 *
 * Replaces node title and summary field with Alternate field values, if they exist
 */
function alternate_node_fields_views_pre_render(\Drupal\views\ViewExecutable $view) {
  // Check if the current view is a node view and if it has results.
  if ($view->storage->get('base_table') === 'node_field_data' && !empty($view->result)) {
    foreach ($view->result as $row) {
      // Check if the row is a node entity.
      if (isset($row->_entity) && $row->_entity instanceof \Drupal\node\NodeInterface) {
        $node = $row->_entity;

        // alternate title
        if ($node->hasField('field_alt_node_fields_title') && !$node->get('field_alt_node_fields_title')->isEmpty()) {
          $alternate_title = $node->get('field_alt_node_fields_title')->value;
          // Set the node title to the alternate field value.
          $node->setTitle($alternate_title);
        }                
 
        // alternate summary feed
  			if ($node->hasField('field_alt_node_fields_feed_summa') && !$node->get('field_alt_node_fields_feed_summa')->isEmpty()) {
    			$alternate_summary_feed = $node->get('field_alt_node_fields_feed_summa')->value;
    			$node->field_summary_for_feed_1->value = $alternate_summary_feed;
  			}         
      }
    }
  }
}

/**
 * Implements hook_tokens_alter().
 *
 * Replaces node title token for metatags with Alternate Title value, if it exists
 */
function alternate_node_fields_tokens_alter(array &$replacements, array $context, BubbleableMetadata $bubbleable_metadata) {
  // Check if we are dealing with a node context.
  if (isset($context['data']['node']) && $context['data']['node'] instanceof NodeInterface) {
    /** @var \Drupal\node\NodeInterface $node */
    $node = $context['data']['node'];

    if ($node->hasField('field_alt_node_fields_title') && !$node->get('field_alt_node_fields_title')->isEmpty()) {
    	$custom_value = $node->get('field_alt_node_fields_title')->value;
      $replacements['[node:title]'] = $custom_value;
    }

    // Add cacheability metadata if your dynamic content relies on it.
    $bubbleable_metadata->addCacheableDependency($node);
  }
}

/**
 * Implements hook_preprocess_node().
 *
 * Replaces node title and summary field with Alternate field values, if they exist
 */
function alternate_node_fields_preprocess_node(&$variables) {
  $node = $variables['node'];

  // Check if the node has the alternate field and it's not empty.
  if ($node->hasField('field_alt_node_fields_title') && !$node->get('field_alt_node_fields_title')->isEmpty()) {
    $alternate_title = $node->get('field_alt_node_fields_title')->value;
    $variables['label'] = $alternate_title; // This replaces the node title in node.html.twig.
  }
  
  // Check if the node has the alternate summary field and it's not empty.
  if ($node->hasField('field_alt_node_fields_feed_summa') && !$node->get('field_alt_node_fields_feed_summa')->isEmpty()) {
    $alternate_summary_feed = $node->get('field_alt_node_fields_feed_summa')->value;
    $variables['node']->field_summary_for_feed_1->setValue(['value' => $alternate_summary_feed]);
   // $variables['content']['field_summary_for_feed_1'] = $alternate_summary_feed; // This replaces the node title in node.html.twig.
  }  
}

/**
 * Implements hook_preprocess_search_result(). 
 *
 * Replaces node title with Alternate Title value, if it exists
 */
function alternate_node_fields_preprocess_search_result(&$variables) {
  // Get the result entity (e.g., node, user, etc.)
  $result_entity = $variables['result']['node']; // Adjust 'node' based on the entity type

  // Check if the entity and the field exist
  if ($result_entity && $result_entity->hasField('field_alt_node_fields_title') && !$result_entity->get('field_alt_node_fields_title')->isEmpty()) {
    $field_value = $result_entity->get('field_alt_node_fields_title')->value;
    $variables['title'] = $field_value;
  }
}

/**
 * Implements hook_preprocess_breadcrumb(). 
 *
 * Replaces node title with Alternate Title value, if it exists
 * !!!! needs to be fixed to work with easy breadcrumb !!!!!!
 */
function alternate_node_fields_preprocess_breadcrumb(&$variables){
  $variables['#cache']['max-age'] = 0;

  $request = \Drupal::request();
  $title = '';
  if ($route = $request->attributes->get(RouteObjectInterface::ROUTE_OBJECT)) {
    $title = \Drupal::service('title_resolver')->getTitle($request, $route);
  	
  	// Replaces node title with Alternate Title value, if it exists
  	// Get the current route match.
		$route_match = \Drupal::routeMatch();
    if ($node = $route_match->getParameter('node')) {

  		// Check if the entity and the field exist
  		if ($node->hasField('field_alt_node_fields_title') && !$node->get('field_alt_node_fields_title')->isEmpty()) {
    		$field_value = $node->get('field_alt_node_fields_title')->value;
    		$title = $field_value;
  		}
    }
  }

  if($variables['breadcrumb']){
     foreach ($variables['breadcrumb'] as $key => &$value) {
      if($value['text'] == 'Node'){
        unset($variables['breadcrumb'][$key]);
      }
    }
    if(!empty($title)){
      $variables['breadcrumb'][] = array(
        'text' => ''
      );
      $variables['breadcrumb'][] = array(
        'text' => $title
      );
    }
  }
}