Course module implemented

Moderator can now create courses. Under his courses he can create quizzes.
Students can enroll for the course. Moderator can approve or reject
enrollment request of the student.
Student can view quizzes only for the enrolled course.

1 files changed, 111 insertions, 10 deletions

diff --git a/yaksh/views.py b/yaksh/views.py
index 6558427..9540a06 100644
--- a/yaksh/views.py
+++ b/yaksh/views.py
@@ -17,11 +17,11 @@ from taggit.models import Tag
 from itertools import chain
 import json
 # Local imports.
-from yaksh.models import Quiz, Question, QuestionPaper, QuestionSet
+from yaksh.models import Quiz, Question, QuestionPaper, QuestionSet, Course
 from yaksh.models import Profile, Answer, AnswerPaper, User, TestCase
 from yaksh.forms import UserRegisterForm, UserLoginForm, QuizForm,\
                 QuestionForm, RandomQuestionForm, TestCaseFormSet,\
-                QuestionFilterForm
+                QuestionFilterForm, CourseForm
 from yaksh.xmlrpc_clients import code_server
 from settings import URL_ROOT
 from yaksh.models import AssignmentUpload
@@ -157,6 +157,8 @@ def quizlist_user(request):
     disabled_quizzes = []
     unexpired_quizzes = []
 
+    courses = Course.objects.filter(active=True)
+
     for paper in avail_quizzes:
         quiz_enable_time = paper.quiz.start_date_time
         quiz_disable_time = paper.quiz.end_date_time
@@ -170,7 +172,8 @@ def quizlist_user(request):
                 'quizzes': avail_quizzes,
                 'user': user,
                 'quizzes_taken': quizzes_taken,
-                'unexpired_quizzes': unexpired_quizzes
+                'unexpired_quizzes': unexpired_quizzes,
+                'courses': courses
             }
 
     return my_render_to_response("yaksh/quizzes_user.html", context)
@@ -495,7 +498,7 @@ def add_quiz(request, quiz_id=None):
     if not user.is_authenticated() or not is_moderator(user):
         raise Http404('You are not allowed to view this page!')
     if request.method == "POST":
-        form = QuizForm(request.POST)
+        form = QuizForm(request.POST, user=user)
         if form.is_valid():
             data = form.cleaned_data
             if quiz_id is None:
@@ -527,13 +530,13 @@ def add_quiz(request, quiz_id=None):
                                          context_instance=ci)
     else:
         if quiz_id is None:
-            form = QuizForm()
+            form = QuizForm(user=user)
             return my_render_to_response('yaksh/add_quiz.html',
                                          {'form': form},
                                          context_instance=ci)
         else:
             d = Quiz.objects.get(id=quiz_id)
-            form = QuizForm()
+            form = QuizForm(user=user)
             form.initial['start_date'] = d.start_date_time.date()
             form.initial['start_time'] = d.start_date_time.time()
             form.initial['end_date'] = d.end_date_time.date()
@@ -759,7 +762,7 @@ def prof_manage(request):
 rights/permissions and log in."""
     user = request.user
     if user.is_authenticated() and is_moderator(user):
-        question_papers = QuestionPaper.objects.all()
+        question_papers = QuestionPaper.objects.filter(quiz__course__creator=user)
         users_per_paper = []
         for paper in question_papers:
             answer_papers = AnswerPaper.objects.filter(question_paper=paper)
@@ -1166,6 +1169,102 @@ def complete(request, reason=None, attempt_num=None, questionpaper_id=None):
 
 
 @login_required
+def add_course(request):
+    user = request.user
+    ci = RequestContext(request)
+    if not is_moderator(user):
+        raise Http404('You are not allowed to view this page')
+    if request.method == 'POST':
+        form = CourseForm(request.POST)
+        if form.is_valid():
+            new_course = form.save(commit=False)
+            new_course.creator = user
+            new_course.save()
+            return my_render_to_response('manage.html', {'course': new_course})
+        else:
+            return my_render_to_response('yaksh/add_course.html',
+                                         {'form': form},
+                                         context_instance=ci)
+    else:
+        form = CourseForm()
+        return my_render_to_response('yaksh/add_course.html', {'form': form},
+                                     context_instance=ci)
+
+
+@login_required
+def enroll_request(request, course_id):
+    user = request.user
+    ci = RequestContext(request)
+    course = get_object_or_404(Course, pk=course_id)
+    course.request(user)
+    return my_redirect('/exam/manage/')
+
+
+@login_required
+def self_enroll(request, course_id):
+    user = request.user
+    ci = RequestContext(request)
+    course = get_object_or_404(Course, pk=course_id)
+    if course.is_self_enroll():
+        course.enroll(False, user)
+    return my_redirect('/exam/manage/')
+
+
+@login_required
+def courses(request):
+    user = request.user
+    if not is_moderator(user):
+        raise Http404('You are not allowed to view this page')
+    courses = Course.objects.filter(creator=user)
+    return my_render_to_response('yaksh/courses.html', {'courses': courses})
+
+
+@login_required
+def course_detail(request, course_id):
+    user = request.user
+    if not is_moderator(user):
+        raise Http404('You are not allowed to view this page')
+    course = get_object_or_404(Course, creator=user, pk=course_id)
+    return my_render_to_response('yaksh/course_detail.html', {'course': course})
+
+
+@login_required
+def enroll(request, course_id, user_id, was_rejected=False):
+    user = request.user
+    if not is_moderator(user):
+        raise Http404('You are not allowed to view this page')
+    course = get_object_or_404(Course, creator=user, pk=course_id)
+    user = get_object_or_404(User, pk=user_id)
+    course.enroll(was_rejected, user)
+    return course_detail(request, course_id)
+
+
+@login_required
+def reject(request, course_id, user_id, was_enrolled=False):
+    user = request.user
+    if not is_moderator(user):
+        raise Http404('You are not allowed to view this page')
+    course = get_object_or_404(Course, creator=user, pk=course_id)
+    user = get_object_or_404(User, pk=user_id)
+    course.reject(was_enrolled, user)
+    return course_detail(request, course_id)
+
+
+@login_required
+def toggle_course_status(request, course_id):
+    user = request.user
+    if not is_moderator(user):
+        raise Http404('You are not allowed to view this page')
+    course = get_object_or_404(Course, creator=user, pk=course_id)
+    if course.active:
+        course.deactivate()
+    else:
+        course.activate()
+    course.save()
+    return course_detail(request, course_id)
+
+
+@login_required
 def show_statistics(request, questionpaper_id, attempt_number=None):
     user = request.user
     if not is_moderator(user):
@@ -1201,7 +1300,7 @@ def monitor(request, questionpaper_id=None):
         raise Http404('You are not allowed to view this page!')
 
     if questionpaper_id is None:
-        q_paper = QuestionPaper.objects.all()
+        q_paper = QuestionPaper.objects.filter(quiz__course__creator=user)
         context = {'papers': [],
                    'quiz': None,
                    'quizzes': q_paper}
@@ -1209,10 +1308,12 @@ def monitor(request, questionpaper_id=None):
                                      context_instance=ci)
     # quiz_id is not None.
     try:
-        q_paper = QuestionPaper.objects.get(id=questionpaper_id)
+        q_paper = QuestionPaper.objects.get(id=questionpaper_id,
+                                            quiz__course__creator=user)
     except QuestionPaper.DoesNotExist:
         papers = []
         q_paper = None
+        latest_attempts = []
     else:
         latest_attempts = []
         papers = AnswerPaper.objects.filter(question_paper=q_paper).order_by(
@@ -1301,7 +1402,7 @@ def show_all_quiz(request):
         forms = []
         for j in data:
             d = Quiz.objects.get(id=j)
-            form = QuizForm()
+            form = QuizForm(user=user)
             form.initial['start_date'] = d.start_date_time.date()
             form.initial['start_time'] = d.start_date_time.time()
             form.initial['end_date'] = d.end_date_time.date()