Publication.inc.php

<?php
 
import('lib.pkp.classes.publication.PKPPublication');
 
class Publication extends PKPPublication {
 
   public function getLocalizedCoverImageUrl($contextId) {
      $coverImage = $this->getLocalizedData('coverImage');
 
      if (!$coverImage) {
         return '';
      }
 
      import('classes.file.PublicFileManager');
      $publicFileManager = new PublicFileManager();
 
      return join('/', [
         Application::get()->getRequest()->getBaseUrl(),
         $publicFileManager->getContextFilesPath($contextId),
         $coverImage['uploadName'],
      ]);
   }
}