From 33a1aee5c3c3af524cc56056590643af3b127558 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ale=C5=A1=20Smodi=C5=A1?= <aless@guru.si>
Date: Wed, 26 Aug 2015 22:55:53 +0200
Subject: Implemented activity service (auto-saving of traces and solutions).

---
 server/prolog_session.py |  7 ++++---
 server/user_session.py   |  2 +-
 wsgi_server.py           | 36 ++++++++++++++++++++++++------------
 3 files changed, 29 insertions(+), 16 deletions(-)

diff --git a/server/prolog_session.py b/server/prolog_session.py
index 2c2d690..768f820 100644
--- a/server/prolog_session.py
+++ b/server/prolog_session.py
@@ -37,8 +37,7 @@ class PrologSession(object):
     No properties are accessible; use getters and setters instead.
     Values are passed by value instead of by reference (deep copy!).
     """
-    def __init__(self, user_session):
-        self._user_session = user_session  # the owning session
+    def __init__(self):
         self._access_lock = threading.Lock()
         self._engine_id = None
         self._problem_id = -1
@@ -120,5 +119,7 @@ class PrologSession(object):
             more_messages, status, have_more = self.query(query)
             messages.extend(more_messages)
         self._problem_id = problem_id
-#        self._user_session.update_solution(problem_id, [], program)  # TODO
         return messages, status, have_more
+
+    def get_problem_id(self):
+        return self._problem_id
diff --git a/server/user_session.py b/server/user_session.py
index d8cdf1d..d5aec44 100644
--- a/server/user_session.py
+++ b/server/user_session.py
@@ -50,7 +50,7 @@ class UserSession(object):
     def get_prolog(self):
         with self._access_lock:
             if self.prolog_session is None:
-                self.prolog_session = prolog_session.PrologSession(self)  # lazy init
+                self.prolog_session = prolog_session.PrologSession()  # lazy init
             return self.prolog_session
 
     def get_problem_data(self, language, problem_group, problem):
diff --git a/wsgi_server.py b/wsgi_server.py
index 9b3a51e..76489db 100644
--- a/wsgi_server.py
+++ b/wsgi_server.py
@@ -102,9 +102,16 @@ class Login(CodeqService):
                 return {'code': 0, 'message': 'OK', 'sid':session.get_sid()}
 
 class Activity(CodeqService):
-    def on_get(self, req, resp):
-        resp.body = '{}'
-        resp.status = falcon.HTTP_200
+    def process(self, js, session):
+        trace = js.get('trace')
+        solution = js.get('solution')
+        problem_id = js.get('problem_id')
+        if (trace is not None) or (solution is not None):
+            # we have something to do
+            if problem_id is None:
+                return {'code': 1, 'message': 'Problem ID is missing'}
+            else:
+                session.update_solution(problem_id, trace, solution)
 
 class Query(CodeqService):
     def process(self, js, session):
@@ -112,28 +119,33 @@ class Query(CodeqService):
         if step is None:
             return {'code': 1, 'message': '"step" is not set'}
         else:
+            problem_id = js.get('problem_id')
+            if problem_id is None:
+                return {'code': 4, 'message': 'Problem ID not given'}
+            trace = js.get('trace')
             prolog = session.get_prolog()
+            program = None
             if step == 'run':
                 program = js.get('program')
                 query = js.get('query')
-                problem_id = js.get('problem_id')
                 if program is None:
-                    return {'code': 2, 'message': 'No program specified'}
+                    result = {'code': 2, 'message': 'No program specified'}
                 elif query is None:
-                    return {'code': 3, 'message': 'No query specified'}
-                elif problem_id is None:
-                    return {'code': 4, 'message': 'Problem ID not given'}
+                    result = {'code': 3, 'message': 'No query specified'}
                 else:
                     messages, status, have_more = prolog.run_for_user(session.get_uid(), problem_id, program, query)
-                    return {'code': 0, 'message': 'ok', 'terminal': {'messages': messages, 'status': status, 'have_more': have_more}}
+                    result = {'code': 0, 'message': 'ok', 'terminal': {'messages': messages, 'status': status, 'have_more': have_more}}
             elif step == 'next':
                 messages, status, have_more = prolog.step()
-                return {'code': 0, 'message': 'ok', 'terminal': {'messages': messages, 'status': status, 'have_more': have_more}}
+                result = {'code': 0, 'message': 'ok', 'terminal': {'messages': messages, 'status': status, 'have_more': have_more}}
             elif step == 'end':
                 messages, status, have_more = prolog.end()
-                return {'code': 0, 'message': 'ok', 'terminal': {'messages': messages, 'status': status, 'have_more': have_more}}
+                result = {'code': 0, 'message': 'ok', 'terminal': {'messages': messages, 'status': status, 'have_more': have_more}}
             else:
-                return {'code': 5, 'message': 'Unknown prolog step: {0}'.format(step)}
+                result = {'code': 5, 'message': 'Unknown prolog step: {0}'.format(step)}
+            if program or trace:
+                session.update_solution(problem_id, trace, program)
+            return result
 
 class GetProblem(CodeqService):
     def process(self, js, session):
-- 
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