3381 Fix NPE when supervisors fill in individual criteria before final thesis is uploaded

view/src/main/java/se/su/dsv/scipro/grading/SendToExaminer.java

@@ -264,11 +264,20 @@ public class SendToExaminer extends GenericPanel<Project> {
                 .map(instant -> instant.atZone(ZoneId.systemDefault()))
                 .map(ZonedDateTime::toLocalDate);
 
-        if (seminarDate.isPresent() && seminarDate.get().isAfter(finalThesis.getUploadDate())) {
+        boolean hasFinalThesis = finalThesis != null;
-            return seminarDate.get();
+        boolean hasSeminarDate = seminarDate.isPresent();
-        }
+        if (hasFinalThesis && hasSeminarDate) {
-        else {
+            if (finalThesis.getUploadDate().isAfter(seminarDate.get())) {
+                return finalThesis.getUploadDate();
+            } else {
+                return seminarDate.get();
+            }
+        } else if (hasFinalThesis) {
             return finalThesis.getUploadDate();
+        } else if (hasSeminarDate) {
+            return seminarDate.get();
+        } else {
+            return null;
         }
     }