Added API key validation helper

src/ApiKeyExtractor.php → src/ApiKeyHelper.php

@@ -3,12 +3,13 @@
 namespace Speicher210\KontaktIO;
 
 use GuzzleHttp\Client as GuzzleHttpClient;
+use GuzzleHttp\Exception\ClientException;
 use Speicher210\KontaktIO\Exception\ApiKeyExtractionInvalidCredentialsException;
 
 /**
- * Get the API key using username and password.
+ * Helper functions around the API key.
  */
-class ApiKeyExtractor
+class ApiKeyHelper
 {
     /**
      * Get the API key using a username and password combination.
@@ -38,4 +39,21 @@ public static function getApiKey($username, $password)
 
         return (string)$response->getBody();
     }
+
+    public static function apiKeyIsValid($apiKey)
+    {
+        $client = new Client($apiKey);
+
+        try {
+            $client->get('/manager/me');
+
+            return true;
+        } catch (ClientException $e) {
+            if ($e->getResponse()->getStatusCode() === 401) {
+                return false;
+            }
+
+            throw $e;
+        }
+    }
 }