Refactoring

app/src/main/java/eu/faircode/email/ConnectionHelper.java

@@ -22,6 +22,7 @@ import java.net.UnknownHostException;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.Objects;
 
 import javax.mail.Address;
 import javax.mail.internet.InternetAddress;
@@ -316,4 +317,19 @@ public class ConnectionHelper {
 
         return ok;
     }
+
+    static boolean isSameDomain(String host1, String host2) {
+        String domain1 = getDomain(host1);
+        String domain2 = getDomain(host2);
+        return Objects.equals(domain1, domain2);
+    }
+
+    private static String getDomain(String host) {
+        if (host != null) {
+            String[] h = host.split("\\.");
+            if (h.length >= 2)
+                return h[h.length - 2] + "." + h[h.length - 1];
+        }
+        return host;
+    }
 }

app/src/main/java/eu/faircode/email/FragmentAccount.java

@@ -934,7 +934,7 @@ public class FragmentAccount extends FragmentBase {
                         List<EntityIdentity> identities = db.identity().getIdentities(account.id);
                         for (EntityIdentity identity : identities)
                             if (identity.password.equals(account.password) &&
-                                    Helper.getTld(identity.host).equals(Helper.getTld(account.host))) {
+                                    ConnectionHelper.isSameDomain(identity.host, account.host)) {
                                 Log.i("Changing identity password host=" + identity.host);
                                 identity.password = password;
                                 db.identity().updateIdentity(identity);

app/src/main/java/eu/faircode/email/Helper.java

@@ -871,14 +871,6 @@ public class Helper {
         return true;
     }
 
-    static String getTld(String host) {
-        String[] h = host.split("\\.");
-        if (h.length >= 2)
-            return h[h.length - 2] + "." + h[h.length - 1];
-        else
-            return host;
-    }
-
     static int getSize(Bundle bundle) {
         Parcel p = Parcel.obtain();
         bundle.writeToParcel(p, 0);