add extra validation for selected features to be for users

Author: goekay

src/main/java/de/rwth/idsg/steve/web/dto/UserForm.java

@@ -19,9 +19,11 @@
 package de.rwth.idsg.steve.web.dto;
 
 import de.rwth.idsg.steve.NotificationFeature;
+import jakarta.validation.constraints.AssertTrue;
 import lombok.Getter;
 import lombok.Setter;
 import lombok.ToString;
+import org.apache.cxf.common.util.CollectionUtils;
 import org.joda.time.LocalDate;
 
 import jakarta.validation.constraints.Email;
@@ -60,4 +62,19 @@ public class UserForm {
 
     private Address address;
 
+    @AssertTrue(message = "Some of the selected notification features cannot be enabled for a user")
+    public boolean isNotificationFeaturesForUser() {
+        if (CollectionUtils.isEmpty(notificationFeatures)) {
+            return true;
+        }
+
+        for (var selectedFeature : notificationFeatures) {
+            if (!selectedFeature.isForUser()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
 }