[FEATURE] adds HighlightAuthorViewHelper to highlight an Author ()by …

Classes/ViewHelpers/Format/HighlightAuthorViewHelper.php

@@ -0,0 +1,86 @@
+<?php
+declare(strict_types=1);
+namespace In2code\Publications\ViewHelpers\Format;
+
+
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use In2code\Publications\Domain\Model\Author;
+use In2code\Publications\Domain\Repository\AuthorRepository;
+use In2code\Publications\Utility\ObjectUtility;
+use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
+
+/**
+ * Class HighlightAuthorViewHelper
+ * wraps html around search terms
+ */
+class HighlightAuthorViewHelper extends AbstractViewHelper
+{
+
+  /**
+   * @var bool
+   */
+  protected $escapeOutput = false;
+
+    /**
+     * @return void
+     */
+    public function initializeArguments()
+    {
+        parent::initializeArguments();
+        $this->registerArgument('author', 'mixed', 'Author array', true);
+        $this->registerArgument('before', 'string', 'Add this html before Author of interest', false);
+        $this->registerArgument('after', 'string', 'Add this html after', false);
+        $this->registerArgument('searchterms','mixed', 'Searchterms, Authors selected in Filter in flexform/TS ', false);
+    }
+
+    /**
+     * @return string
+     */
+    public function render(): string
+    {
+        $value = implode(PHP_EOL, GeneralUtility::trimExplode(PHP_EOL, $this->renderChildren(), true));
+        if (!empty($value))  {
+          if (!empty($this->arguments['searchterms'])) {
+            $filterauthors=$this->getAuthors($this->arguments['searchterms']);
+            $author[]= $this->arguments['author'];
+            $match = array_intersect($filterauthors,$author); //intersect_assoc is too strict
+            if(!empty($match)) {
+             return $this->wrapText($value);
+           }
+        }
+      }
+        return $value;
+    }
+
+    /**
+     * @param string $text
+     * @return string
+     */
+    protected function wrapText(string $text): string
+    {
+        if (!empty($this->arguments['before'])) {
+            $text = $this->arguments['before'] . $text;
+        }
+        if (!empty($this->arguments['after'])) {
+            $text .= $this->arguments['after'];
+        }
+        return $text;
+    }
+
+
+    /**
+     * @param string $filter
+     * @return array
+     */
+    protected function getAuthors(string $filter): array
+    {
+          $authors = [];
+          $authorRepository = ObjectUtility::getObjectManager()->get(AuthorRepository::class);
+          foreach (GeneralUtility::intExplode(',', $filter, true) as $identifier) {
+              $authors[] = $authorRepository->findByUid($identifier);
+          }
+    //  }
+      return $authors;
+    }
+
+}