Resolve "Remove all use of GLOBALS"

Closes #13

classes/Endpoint.php

@@ -3,6 +3,8 @@
 namespace uib\ub\loadspeakr;
 
 
+use UnexpectedValueException;
+
 final class Endpoint
 {
     private string $sparqlUrl;
@@ -47,10 +49,14 @@ final class Endpoint
             $this->updateCache($result['status'], $cacheFile, $aux, $conf);
         }
 
+        if (!$aux) {
+            return $aux;
+        }
+
         return $this->result($q, $aux);
     }
 
-    private function result($q, $aux)
+    private function result(string $q, string $aux)
     {
         if (false !== stripos($q, "select")) {
             return json_decode($aux, true);
@@ -76,22 +82,17 @@ final class Endpoint
         return !empty($conf['cache']['global']) && is_int($conf['cache']['global']) && $conf['cache']['global'] > 0;
     }
 
-    private function updateCache($http_status, $cacheFile, $aux, $conf)
+    private function updateCache($http_status, $cacheFile, $aux, $conf): void
     {
-        $result = false;
-
-        if ($this->caching($conf) && $http_status == 200) {
+        if ($http_status === 200 && $this->caching($conf)) {
             $result = file_put_contents($cacheFile, ($aux), LOCK_EX);
 
             if (!$result) {
-                throw new \UnexpectedValueException(
+                throw new UnexpectedValueException(
                   'Unable to update cache: ' . $cacheFile
                 );
             }
-
         }
-
-        return $result;
     }
 
     private function curl(string $request, $accept, array $conf): array