X-Git-Url: https://git.cweiske.de/shpub.git/blobdiff_plain/6f2bbd991fb885228702b960b17000fe2fc40567..613d09d06d7bab3c6d91fd1b5b231e54c7304480:/src/shpub/Validator.php

diff --git a/src/shpub/Validator.php b/src/shpub/Validator.php
index 1da91cb..c751595 100644
--- a/src/shpub/Validator.php
+++ b/src/shpub/Validator.php
@@ -28,5 +28,18 @@ class Validator
 
         return $url;
     }
+
+    public static function rsvp($answer)
+    {
+        $allowed = ['yes', 'no', 'maybe'];
+        if (false === array_search($answer, $allowed)) {
+            Log::err(
+                'Invalid RSVP answer given; allowed are: '
+                . implode(', ', $allowed)
+            );
+            return false;
+        }
+        return $answer;
+    }
 }
 ?>