From 06cac195f012b089d01813e6779aa5c1d0320d49 Mon Sep 17 00:00:00 2001
From: Jason Bau <jbau@stanford.edu>
Date: Sat, 28 Sep 2013 00:30:47 -0700
Subject: [PATCH] make ENABLE_SHOPPING_CART truly optional

course_about was throwing 500s if ENABLE_SHOPPING_CART=False
---
 lms/djangoapps/courseware/views.py         |  3 +-
 lms/templates/courseware/course_about.html | 52 ++++++++++++----------
 lms/templates/navigation.html              |  2 +-
 3 files changed, 32 insertions(+), 25 deletions(-)

diff --git a/lms/djangoapps/courseware/views.py b/lms/djangoapps/courseware/views.py
index 4488b510d0..c5489d3b30 100644
--- a/lms/djangoapps/courseware/views.py
+++ b/lms/djangoapps/courseware/views.py
@@ -609,7 +609,8 @@ def course_about(request, course_id):
     registration_price = 0
     in_cart = False
     reg_then_add_to_cart_link = ""
-    if settings.MITX_FEATURES.get('ENABLE_PAID_COURSE_REGISTRATION'):
+    if (settings.MITX_FEATURES.get('ENABLE_SHOPPING_CART') and
+        settings.MITX_FEATURES.get('ENABLE_PAID_COURSE_REGISTRATION')):
         registration_price = CourseMode.min_course_price_for_currency(course_id,
                                                                       settings.PAID_COURSE_REGISTRATION_CURRENCY[0])
         if request.user.is_authenticated():
diff --git a/lms/templates/courseware/course_about.html b/lms/templates/courseware/course_about.html
index e63003b3ee..382dbf4660 100644
--- a/lms/templates/courseware/course_about.html
+++ b/lms/templates/courseware/course_about.html
@@ -3,8 +3,12 @@
   from django.core.urlresolvers import reverse
   from courseware.courses import course_image_url, get_course_about_section
   from courseware.access import has_access
+  from django.conf import settings
 
-  cart_link = reverse('shoppingcart.views.show_cart')
+  if settings.MITX_FEATURES.get('ENABLE_SHOPPING_CART'):
+      cart_link = reverse('shoppingcart.views.show_cart')
+  else:
+      cart_link = ""
 %>
 <%namespace name='static' file='../static_content.html'/>
 
@@ -26,29 +30,31 @@
       $("#class_enroll_form").submit();
       event.preventDefault();
     });
-    add_course_complete_handler = function(jqXHR, textStatus) {
-      if (jqXHR.status == 200) {
-        location.href = "${cart_link}";
-      }
-      if (jqXHR.status == 400) {
-        $("#register_error")
-          .html(jqXHR.responseText ? jqXHR.responseText : "${_('An error occurred. Please try again later.')}")
-          .css("display", "block");
-      }
-      else if (jqXHR.status == 403) {
-          location.href = "${reg_then_add_to_cart_link}";
-      }
-    };
-    $("#add_to_cart_post").click(function(event){
-      $.ajax({
-        url: "${reverse('add_course_to_cart', args=[course.id])}",
-        type: "POST",
-        /* Rant: HAD TO USE COMPLETE B/C PROMISE.DONE FOR SOME REASON DOES NOT WORK ON THIS PAGE. */
-        complete: add_course_complete_handler
-      })
-      event.preventDefault();
-    });
 
+    % if settings.MITX_FEATURES.get('ENABLE_SHOPPING_CART') and settings.MITX_FEATURES.get('ENABLE_PAID_COURSE_REGISTRATION'):
+      add_course_complete_handler = function(jqXHR, textStatus) {
+        if (jqXHR.status == 200) {
+          location.href = "${cart_link}";
+        }
+        if (jqXHR.status == 400) {
+          $("#register_error")
+            .html(jqXHR.responseText ? jqXHR.responseText : "${_('An error occurred. Please try again later.')}")
+            .css("display", "block");
+        }
+        else if (jqXHR.status == 403) {
+            location.href = "${reg_then_add_to_cart_link}";
+        }
+      };
+      $("#add_to_cart_post").click(function(event){
+        $.ajax({
+          url: "${reverse('add_course_to_cart', args=[course.id])}",
+          type: "POST",
+          /* Rant: HAD TO USE COMPLETE B/C PROMISE.DONE FOR SOME REASON DOES NOT WORK ON THIS PAGE. */
+          complete: add_course_complete_handler
+        })
+        event.preventDefault();
+      });
+    % endif
 
     ## making the conditional around this entire JS block for sanity
     %if settings.MITX_FEATURES.get('RESTRICT_ENROLL_BY_REG_METHOD') and course.enrollment_domain:
diff --git a/lms/templates/navigation.html b/lms/templates/navigation.html
index 4182696eb1..e2e1d9d664 100644
--- a/lms/templates/navigation.html
+++ b/lms/templates/navigation.html
@@ -84,7 +84,7 @@ site_status_msg = get_site_status_msg(course_id)
       </li>
     </ol>
       % if settings.MITX_FEATURES.get('ENABLE_PAID_COURSE_REGISTRATION') and \
-           settings.MITX_FEATURES['ENABLE_SHOPPING_CART'] and \
+           settings.MITX_FEATURES.get('ENABLE_SHOPPING_CART') and \
            shoppingcart.models.Order.user_cart_has_items(user):
         <ol class="user">
           <li class="primary">