refs #22603 [finc] re-added traffic light to template ajax/resolverLink

co-authored by: André Lahmann <lahmann@ub.uni-leipzig.de>
* reintroduce ExternalLink view helper in resolverLink.phtml

themes/finc/templates/ajax/resolverLink.phtml

+<!-- finc - templates - ajax - resolverLink -->
 <?php if (!empty($link['href'])): ?>
-  <a href="<?=$this->escapeHtmlAttr($link['href'])?>" title="<?=$this->transEsc($link['service_type'] ?? '')?>"<?=!empty($link['access']) ? ' class="access-' . $link['access'] . '"':''?>>
-    <?=$this->escapeHtml($link['title'] ?? '')?>
-  </a>
+    <?php /* finc-specific change #7986 - CK - traffic light */ ?>
+    <div class="show-availability">
+        <span class="sr-only">
+          <?=$this->translate('Availability')?>: <?=$this->transEsc('resolver_link_access_' . $link['access'])?>
+        </span>
+      <div aria-hidden="true"<?php if (!empty($link['access'])): ?> data-toggle="tooltip" title="<?=$this->transEsc('resolver_link_access_' . $link['access'])?>" class="traffic-light access-<?=$link['access']?>"<?php endif;?>>
+        <span class="first"></span>
+        <span class="second"></span>
+        <span class="last"></span>
+      </div>
+    </div>
+    <?php /* finc-specific change #7986 - END */ ?>
+    <?= $this->externalLink(
+        $this->escapeHtmlAttr($link['href']),
+        $link['title'] ?? '',
+        [
+            'title' => $link['service_type'] ?? '',
+            'class' => !empty($link['access']) ? 'access-' . $link['access'] : ''
+        ]
+    ) ?> <br />
+    <?php /* finc-specific change #5334 - CK */ ?>
+    <small>
+        <?= isset($link['coverage']) ? $this->escapeHtml($link['coverage']) : '' ?>
+        <?= isset($link['coverageHref'])
+            ? $this->externalLink($link['coverageHref'], $this->translate('Readme'))
+            : '' ?>
+    </small>
+    <?php /* finc-specific change #5334 - END */ ?>
 <?php else: ?>
-  <?=$this->escapeHtml($link['title'] ?? '')?>
-<?php endif; ?>
-<?php if (!empty($link['coverage'])): ?>
-  <span class="openurl-coverage">
-     <?=$this->escapeHtml($link['coverage'])?>
-  </span>
+    <?=isset($link['title'])?$this->escapeHtml($link['title']):''?> <?=isset($link['coverage'])?$this->transEsc($link['coverage']):''?>
 <?php endif; ?>
 <?php if (!empty($link['notes'])): ?>
   <span class="openurl-notes">
@@ -20,3 +41,4 @@
     <?=$this->escapeHtml($link['authentication'])?>
   </span>
 <?php endif; ?>
+<!-- finc - templates - ajax - resolverLink - END -->
\ No newline at end of file