From 4237df625a5ab65c146e85f60ea206e7f63ec0c9 Mon Sep 17 00:00:00 2001
From: Vik Paruchuri <vik@edx.org>
Date: Tue, 12 Feb 2013 14:31:30 -0500
Subject: [PATCH] Add in a check function to see if students are allowed to
 submit peer grading

---
 .../open_ended_module.py                      |  1 +
 .../openendedchild.py                         | 23 +++++++++++++++++++
 .../xmodule/xmodule/peer_grading_module.py    |  1 +
 3 files changed, 25 insertions(+)

diff --git a/common/lib/xmodule/xmodule/open_ended_grading_classes/open_ended_module.py b/common/lib/xmodule/xmodule/open_ended_grading_classes/open_ended_module.py
index 95c631c8fd..5d22d6d1b4 100644
--- a/common/lib/xmodule/xmodule/open_ended_grading_classes/open_ended_module.py
+++ b/common/lib/xmodule/xmodule/open_ended_grading_classes/open_ended_module.py
@@ -73,6 +73,7 @@ class OpenEndedModule(openendedchild.OpenEndedChild):
             self.send_to_grader(self.latest_answer(), system)
             self.created = False
 
+
     def _parse(self, oeparam, prompt, rubric, system):
         '''
         Parse OpenEndedResponse XML:
diff --git a/common/lib/xmodule/xmodule/open_ended_grading_classes/openendedchild.py b/common/lib/xmodule/xmodule/open_ended_grading_classes/openendedchild.py
index 1700dcaa07..6c3fd46d19 100644
--- a/common/lib/xmodule/xmodule/open_ended_grading_classes/openendedchild.py
+++ b/common/lib/xmodule/xmodule/open_ended_grading_classes/openendedchild.py
@@ -22,6 +22,7 @@ from xmodule.stringify import stringify_children
 from xmodule.xml_module import XmlDescriptor
 from xmodule.modulestore import Location
 from capa.util import *
+from peer_grading_service import PeerGradingService
 
 from datetime import datetime
 
@@ -104,7 +105,9 @@ class OpenEndedChild(object):
         # Used for progress / grading.  Currently get credit just for
         # completion (doesn't matter if you self-assessed correct/incorrect).
         self._max_score = static_data['max_score']
+        self.peer_gs = PeerGradingService(system.open_ended_grading_interface, system)
 
+        self.system = system
         self.setup_response(system, location, definition, descriptor)
 
     def setup_response(self, system, location, definition, descriptor):
@@ -408,3 +411,23 @@ class OpenEndedChild(object):
                     success = True
 
         return success, string
+
+    def check_if_student_can_submit(self):
+        location = self.system.location.url()
+        student_id = self.system.anonymous_student_id
+        success = False
+        response = {}
+        try:
+            response = self.peer_gs.get_data_for_location(location, student_id)
+            count_graded = response['count_graded']
+            count_required = response['count_required']
+            success = True
+        except:
+            error_message = ("Need to peer grade more in order to make another submission.  "
+                             "You have graded {0}, {1} are required.").format(count_graded, count_required)
+            return success, False, error_message
+        if count_graded>=count_required:
+            return success, True, ""
+        else:
+            return success, False, ""
+
diff --git a/common/lib/xmodule/xmodule/peer_grading_module.py b/common/lib/xmodule/xmodule/peer_grading_module.py
index 457c8ee72a..ba22e8d80c 100644
--- a/common/lib/xmodule/xmodule/peer_grading_module.py
+++ b/common/lib/xmodule/xmodule/peer_grading_module.py
@@ -155,6 +155,7 @@ class PeerGradingModule(XModule):
             count_graded = response['count_graded']
             count_required = response['count_required']
             if count_required > 0 and count_graded >= count_required:
+                #Ensures that once a student receives a final score for peer grading, that it does not change.
                 self.student_data_for_location = response
 
         score_dict = {