return not acceptable response on bad flag

service/src/main/java/repositories/TasksRepository.java

@@ -91,21 +91,15 @@ public class TasksRepository implements Repository {
         }
     }
 
-    private boolean compareHash(String hash, String username) throws Exception {
-        Task task = getUserFlagsHashes(username).get(hash);
-
-        if (task != null) {
+    public boolean checkFlag(String username, String flagValue) throws Exception {
+        Task task = getUserFlagsHashes(username).get(flagValue);
+        if(task != null) {
             acceptSolution(username, task);
             return true;
         }
         return false;
     }
 
-    public boolean checkFlag(String username, String flagValue) throws Exception {
-        return compareHash(flagValue, username);
-        //todo: accept solution should be here
-    }
-
     public Optional<String> getUserTaskFlag(String username, String taskId) {
         //todo: taskId, level, name? discuss
         return getUserFlagsHashes(username).entrySet().stream()

service/src/main/java/resources/TasksResource.java

@@ -63,9 +63,12 @@ public class TasksResource
 
     //todo: move to solutions resource
     @POST
-    public boolean submitSolution(@Auth User user,
+    public Response submitSolution(@Auth User user,
                                    String flag) throws Exception {
-        return tasksRepository.checkFlag(user.getName(), flag);
+        if(tasksRepository.checkFlag(user.getName(), flag)) {
+            return Response.ok().build();
+        }
+        return Response.status(Response.Status.NOT_ACCEPTABLE).build();
     }
 
 }