implemented rewriting of "… (from <sender>)" in subject, prepared open flag

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

@@ -42,6 +42,7 @@ public class MailingList implements MessageHandler {
     public static final int STATE_FORWARD_ATTACHED = 8;
     public static final int STATE_HIDE_RECEIVERS = 16;
     public static final int STATE_REPLY_TO_LIST = 32;
+    public static final int STATE_OPEN = 64;
     private static final int VISIBLE = 1;
     private static final int HIDDEN = 0;
     private static final int DEFAULT_STATE = STATE_PENDING|STATE_HIDE_RECEIVERS;
@@ -134,7 +135,7 @@ public class MailingList implements MessageHandler {
     }
 
 
-    public void enable(boolean enable) throws SQLException {
+    public MailingList enable(boolean enable) throws SQLException {
         setFlag(STATE_ENABLED,enable);
 
         if (enable) {
@@ -142,6 +143,7 @@ public class MailingList implements MessageHandler {
         } else {
             imap.stop();
         }
+        return this;
     }
 
     private void forward(Message message) throws MessagingException {
@@ -153,7 +155,7 @@ public class MailingList implements MessageHandler {
                     .map(User::email)
                     .toList();
             var subject = message.getSubject();
-            // TODO: remove '(from …)' from subject
+
             if (!subject.contains(stamp())) subject = stamp()+" "+subject;
             var replyTo = (newSender == null && hasState(STATE_REPLY_TO_LIST)) ? email() : null;
             smtp.forward(newSender,receivers,message,subject,hasState(STATE_FORWARD_ATTACHED),hasState(STATE_HIDE_RECEIVERS),replyTo);
@@ -162,12 +164,12 @@ public class MailingList implements MessageHandler {
         }
     }
 
-    public void forwardAttached(boolean forward) throws SQLException {
-        setFlag(STATE_FORWARD_ATTACHED,forward);
+    public MailingList forwardAttached(boolean forward) throws SQLException {
+        return setFlag(STATE_FORWARD_ATTACHED,forward);
     }
 
-    public void forwardFrom(boolean forward) throws SQLException {
-        setFlag(STATE_FORWARD_FROM,forward);
+    public MailingList forwardFrom(boolean forward) throws SQLException {
+        return setFlag(STATE_FORWARD_FROM,forward);
     }
 
 
@@ -201,12 +203,12 @@ public class MailingList implements MessageHandler {
         return (state & test) > 0;
     }
 
-    public void hide(boolean hide) throws SQLException {
-        setFlag(STATE_PUBLIC,!hide);
+    public MailingList hide(boolean hide) throws SQLException {
+        return setFlag(STATE_PUBLIC,!hide);
     }
 
-    public void hideReceivers(boolean hide) throws SQLException {
-        setFlag(STATE_HIDE_RECEIVERS,hide);
+    public MailingList hideReceivers(boolean hide) throws SQLException {
+        return setFlag(STATE_HIDE_RECEIVERS,hide);
     }
 
     /**
@@ -316,6 +318,10 @@ public class MailingList implements MessageHandler {
         }
     }
 
+    public MailingList open(boolean open) throws SQLException {
+        return setFlag(STATE_OPEN,open);
+    }
+
     /**
      * provide the set of mailing lists that are publicy open to subscriptions
      * @return
@@ -336,8 +342,8 @@ public class MailingList implements MessageHandler {
         return list;
     }
 
-    public void replyToList(boolean on) throws SQLException {
-        setFlag(STATE_REPLY_TO_LIST,on);
+    public MailingList replyToList(boolean on) throws SQLException {
+        return setFlag(STATE_REPLY_TO_LIST,on);
     }
 
 
@@ -399,9 +405,10 @@ public class MailingList implements MessageHandler {
         smtp.login().send(email(),name(),user.email(),subject,text);
     }
 
-    private void setFlag(int flag, boolean on) throws SQLException {
+    private MailingList setFlag(int flag, boolean on) throws SQLException {
         state = on ? state | flag : state ^ (state & flag);
         Database.open().update(TABLE_NAME).set(STATE,state).where(EMAIL, email()).compile().run();
+        return this;
     }
 
     public Map<String,Integer> stateMap(){