refs #18611 [finc] react on resolver state 10 "unknown"

* adds readout of state 10
* also adds some refactoring to streamline Ezb Class

refs #18611 [finc] adds getDOI to MARC driver

refs #18611 [finc] add DOI-Parameter do Ezb-Query

+ slight refactoring

module/finc/src/finc/RecordDriver/SolrMarcFincTrait.php

@@ -404,6 +404,22 @@ trait SolrMarcFincTrait
         return  $retval;
     }
 
+    public function getDOI () {
+
+        $allIdentifiers = $this->getOtherIdentifiers();
+        $dois = $allIdentifiers['doi'] ?? [];
+        if (!empty($dois)) {
+            return current($dois);
+        }
+        $urls = $this->getURLs();
+        foreach ($urls as $url) {
+            if (strpos($url['url'],'https://doi.org/') === 0) {
+                return substr($url['url'],16);
+            }
+        }
+        return null;
+    }
+
     /**
      * Get an array of instrumentation notes taken from the local data
      * of the Petrucci music library subfield 590b

module/finc/src/finc/Resolver/Driver/Ezb.php

@@ -131,16 +131,18 @@ class Ezb extends AbstractBase implements TranslatorAwareInterface
 
 
         if (isset($this->config->bibid)) {
-            $openURL .= '&pid=' .
-                'bibid%3D' . $this->config->bibid;
+            $pid = 'bibid=' . $this->config->bibid;
         } else {
             // use IP-based request as fallback
-            $openURL .= '&pid=client_ip%3D' . $_SERVER['REMOTE_ADDR'];
+            $pid = 'client_ip=' . $_SERVER['REMOTE_ADDR'];
         }
-        $openURL .= !isset($parsed['rft.issn']) && isset($parsed['zdbid']) ?
+        $pid .= !isset($parsed['rft.issn']) && isset($parsed['zdbid']) ?
             '&zdbid=' . $parsed['zdbid'] : '';
+        $pid .= '&ezb=1';
 
-        $openURL .= urlencode('&ezb=1');
+        $openURL .= '&pid=' . urlencode($pid);
+
+        $openURL .= isset($parsed['doi']) ? '&id=doi:' . $parsed['doi'] : '';
 
         $url = $this->getResolverUrl($openURL);