2984 PO 4) Fix approving the same document multiple times

core/src/main/java/se/su/dsv/scipro/plagiarism/PlagiarismControlImpl.java

@@ -9,6 +9,7 @@ import se.su.dsv.scipro.plagiarism.urkund.UrkundSubmissionRepository;
 import se.su.dsv.scipro.system.User;
 
 import javax.inject.Inject;
+import java.util.Objects;
 import java.util.Optional;
 
 public class PlagiarismControlImpl implements PlagiarismControl {
@@ -30,6 +31,9 @@ public class PlagiarismControlImpl implements PlagiarismControl {
     @Override
     @Transactional
     public void submit(final FileDescription file, final User receiver) {
+        if (!Objects.equals(new Status.NotSubmitted(), getStatus(file))) {
+            return;
+        }
         final FileReference reference = fileService.createReference(file);
         final PlagiarismRequest plagiarismRequest = new PlagiarismRequest();
         plagiarismRequest.setDocument(reference);