From 3c8eacd4407517b8829a0edcafe3924a0b822544 Mon Sep 17 00:00:00 2001
From: Waheed Ahmed <waheed.ahmed@arbisoft.com>
Date: Thu, 17 Jul 2014 15:52:02 +0500
Subject: [PATCH] Disabled student view if course is not yet released for
 students. LMS-6617

---
 lms/djangoapps/courseware/views.py             | 18 +++++++++++++++++-
 .../courseware/course_navigation.html          |  7 +++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/lms/djangoapps/courseware/views.py b/lms/djangoapps/courseware/views.py
index 20164db01f..c9b50d18b6 100644
--- a/lms/djangoapps/courseware/views.py
+++ b/lms/djangoapps/courseware/views.py
@@ -6,6 +6,7 @@ import logging
 import urllib
 import json
 
+from datetime import datetime
 from collections import defaultdict
 from django.utils import translation
 from django.utils.translation import ugettext as _
@@ -16,6 +17,7 @@ from django.core.exceptions import PermissionDenied
 from django.core.urlresolvers import reverse
 from django.contrib.auth.models import User, AnonymousUser
 from django.contrib.auth.decorators import login_required
+from django.utils.timezone import UTC
 from django.views.decorators.http import require_GET
 from django.http import Http404, HttpResponse
 from django.shortcuts import redirect
@@ -27,7 +29,7 @@ from functools import wraps
 from markupsafe import escape
 
 from courseware import grades
-from courseware.access import has_access
+from courseware.access import has_access, _adjust_start_date_for_beta_testers
 from courseware.courses import get_courses, get_course, get_studio_url, get_course_with_access, sort_by_announcement
 from courseware.masquerade import setup_masquerade
 from courseware.model_data import FieldDataCache
@@ -337,6 +339,13 @@ def index(request, course_id, chapter=None, section=None,
             'reverifications': fetch_reverify_banner_info(request, course_key),
         }
 
+        now = datetime.now(UTC())
+        effective_start = _adjust_start_date_for_beta_testers(user, course, course_key)
+        if staff_access and now < effective_start:
+            # Disable student view button if user is staff and
+            # course is not yet visible to students.
+            context['disable_student_access'] = True
+
         has_content = course.has_children_at_depth(CONTENT_DEPTH)
         if not has_content:
             # Show empty courseware for a course with no units
@@ -590,6 +599,13 @@ def course_info(request, course_id):
         'url_to_enroll': url_to_enroll,
     }
 
+    now = datetime.now(UTC())
+    effective_start = _adjust_start_date_for_beta_testers(request.user, course, course_key)
+    if staff_access and now < effective_start:
+        # Disable student view button if user is staff and
+        # course is not yet visible to students.
+        context['disable_student_access'] = True
+
     return render_to_response('courseware/info.html', context)
 
 
diff --git a/lms/templates/courseware/course_navigation.html b/lms/templates/courseware/course_navigation.html
index 267bc6896a..248ef0f45d 100644
--- a/lms/templates/courseware/course_navigation.html
+++ b/lms/templates/courseware/course_navigation.html
@@ -62,6 +62,10 @@ def url_class(is_active):
 <script type="text/javascript">
 masq = (function(){
     var el = $('#staffstatus');
+    % if disable_student_access:
+        el.attr("disabled", true);
+        el.attr("title", "${_("Course is not yet visible to students.")}");
+    % endif
     var setstat = function(status){
         if (status=='student'){
             el.html('<font color="green">${_("Student view")}</font>');
@@ -72,6 +76,9 @@ masq = (function(){
     setstat('${masquerade}');
 
     el.click(function(){
+        if (el.attr("disabled")) {
+           return alert("${_("You cannot view the course as a student or beta tester before the course release date.")}");
+        }
         $.ajax({ url: '/masquerade/toggle',
                  type: 'GET',
                  success: function(result){