3 files changed, 88 insertions, 2 deletions
diff --git a/api/serializers.py b/api/serializers.py
index d34f269..df66730 100644
--- a/api/serializers.py
+++ b/api/serializers.py
@@ -1,5 +1,8 @@
 from rest_framework import serializers
-from yaksh.models import Question, Quiz, QuestionPaper, AnswerPaper
+from yaksh.models import (
+    Question, Quiz, QuestionPaper, AnswerPaper, Course,
+    LearningModule, LearningUnit, Lesson
+)
 
 
 class QuestionSerializer(serializers.ModelSerializer):
@@ -21,6 +24,43 @@ class QuestionPaperSerializer(serializers.ModelSerializer):
 
 
 class AnswerPaperSerializer(serializers.ModelSerializer):
+
+    questions = QuestionSerializer(many=True)
+
     class Meta:
         model = AnswerPaper
         fields = '__all__'
+
+
+class LessonSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Lesson
+        fields = '__all__'
+
+
+class LearningUnitSerializer(serializers.ModelSerializer):
+
+    quiz = QuizSerializer()
+    lesson = LessonSerializer()
+
+    class Meta:
+        model = LearningUnit
+        fields = '__all__'
+
+
+class LearningModuleSerializer(serializers.ModelSerializer):
+
+    learning_unit = LearningUnitSerializer(many=True)
+
+    class Meta:
+        model = LearningModule
+        fields = '__all__'
+
+
+class CourseSerializer(serializers.ModelSerializer):
+
+    learning_module = LearningModuleSerializer(many=True)
+
+    class Meta:
+        model = Course
+        fields = '__all__'
diff --git a/api/urls.py b/api/urls.py
index 5dfd8c7..22a9b54 100644
--- a/api/urls.py
+++ b/api/urls.py
@@ -7,6 +7,9 @@ urlpatterns = [
     url(r'questions/$', views.QuestionList.as_view(), name='questions'),
     url(r'questions/(?P<pk>[0-9]+)/$', views.QuestionDetail.as_view(),
         name='question'),
+    url(r'get_courses/$', views.CourseList.as_view(), name='get_courses'),
+    url(r'start_quiz/(?P<course_id>[0-9]+)/(?P<quiz_id>[0-9]+)/$', views.StartQuiz.as_view(),
+        name='start_quiz'),
     url(r'quizzes/$', views.QuizList.as_view(), name='quizzes'),
     url(r'quizzes/(?P<pk>[0-9]+)/$', views.QuizDetail.as_view(), name='quiz'),
     url(r'questionpapers/$', views.QuestionPaperList.as_view(),
diff --git a/api/views.py b/api/views.py
index ff21828..b81e895 100644
--- a/api/views.py
+++ b/api/views.py
@@ -3,7 +3,7 @@ from yaksh.models import (
 )
 from api.serializers import (
     QuestionSerializer, QuizSerializer, QuestionPaperSerializer,
-    AnswerPaperSerializer
+    AnswerPaperSerializer, CourseSerializer
 )
 from rest_framework.views import APIView
 from rest_framework.response import Response
@@ -31,6 +31,49 @@ class QuestionList(APIView):
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
 
 
+class CourseList(APIView):
+    """ List all courses """
+
+    def get(self, request, format=None):
+        courses = Course.objects.filter(students=request.user)
+        serializer = CourseSerializer(courses, many=True)
+        return Response(serializer.data)
+
+
+class StartQuiz(APIView):
+    """ Retrieve Answerpaper. If does not exists then create one """
+
+    def get_quiz(self, pk, user):
+        try:
+            return Quiz.objects.get(pk=pk)
+        except Quiz.DoesNotExist:
+            raise Http404
+
+    def get(self, request, course_id, quiz_id,  format=None):
+        user = request.user
+        quiz = self.get_quiz(quiz_id, user)
+        questionpaper = quiz.questionpaper_set.first()
+
+        last_attempt = AnswerPaper.objects.get_user_last_attempt(
+            questionpaper, user, course_id)
+        if last_attempt and last_attempt.is_attempt_inprogress():
+            serializer = AnswerPaperSerializer(last_attempt)
+            return Response(serializer.data)
+
+        can_attempt, msg = questionpaper.can_attempt_now(user, course_id)
+        if not can_attempt:
+            return Response({'message': msg})
+        if not last_attempt:
+            attempt_number = 1
+        else:
+            attempt_number = last_attempt.attempt_number + 1
+        ip = request.META['REMOTE_ADDR']
+        answerpaper = questionpaper.make_answerpaper(user, ip, attempt_number,
+                                                     course_id)
+        serializer = AnswerPaperSerializer(answerpaper)
+        return Response(serializer.data, status=status.HTTP_201_CREATED)
+
+
 class QuestionDetail(APIView):
     """ Retrieve, update or delete a question """