Re-add support for disabling some hint types

Experiment descriptor to select allowed hint types is

    {'id': 'hints', 'group': 'none|automatic|manual|all'}

and works for all languages.

1 files changed, 16 insertions, 2 deletions

diff --git a/server/python_session.py b/server/python_session.py
index 52a54de..ecb075a 100644
--- a/server/python_session.py
+++ b/server/python_session.py
@@ -102,21 +102,35 @@ class PythonSession(server.LanguageSession):
         return []
 
     def test(self, sid, problem_id, program):
+        session = server.user_session.get_session_by_id(sid)
         p = Problem.get(id=problem_id)
+
         language_module = server.problems.load_language(p.language, 'common')
         problem_module = server.problems.load_problem(p.language, p.group, p.identifier, 'common')
 
+        # experiment support for allowing none/automatic/manual/all hints
+        # descriptor: {'id': 'hints', 'group': 'none|automatic|manual|all'}
+        allowed_hints = 'all'
+        for experiment in session.get_experiments():
+            if experiment.get('id') == 'hints':
+                allowed_hints = experiment.get('group')
+                break
+
         # check if the program is correct
         passed, msgs = problem_module.test(self.run, program)
         if passed:
-            session = server.user_session.get_session_by_id(sid)
             session.update_solution(problem_id, solution=program, done=True)
         else:
             hints = []
+            # manually defined problem-specific hints
             if not hints and hasattr(language_module, 'hint'):
                 hints = language_module.hint(self.run, program)
-            if not hints and hasattr(problem_module, 'hint'):
+
+            # generic language hints (style etc.)
+            if not hints and hasattr(problem_module, 'hint') and \
+                    allowed_hints in ('all', 'manual'):
                 hints = problem_module.hint(self.run, program)
+
             if hints:
                 msgs.extend(hints)