working on list submission

src/main/java/de/srsoftware/widerhall/data/MailingList.java

@@ -123,6 +123,10 @@ public class MailingList {
         return list;
     }
 
+    public static boolean isOpen(String list) {
+        return openLists().stream().filter(ml -> ml.email.equals(list)).count() > 0;
+    }
+
     public Map<String, Object> safeMap() {
         var map = new HashMap<String,Object>();
         String[] parts = email.split("@", 2);
@@ -163,4 +167,7 @@ public class MailingList {
         return this;
     }
 
+    public String email() {
+        return email;
+    }
 }