From 00b885deaab1be707fa2a79ad9308e8f7d8ab9bf Mon Sep 17 00:00:00 2001
From: David Baumgold <david@davidbaumgold.com>
Date: Tue, 11 Jun 2013 15:08:05 -0400
Subject: [PATCH] Update pdf textbooks backend to respond to AJAX requests with
 JSON

---
 cms/djangoapps/contentstore/views/course.py | 51 +++++++++++++--------
 1 file changed, 31 insertions(+), 20 deletions(-)

diff --git a/cms/djangoapps/contentstore/views/course.py b/cms/djangoapps/contentstore/views/course.py
index 0293421bea..0457c93916 100644
--- a/cms/djangoapps/contentstore/views/course.py
+++ b/cms/djangoapps/contentstore/views/course.py
@@ -12,6 +12,8 @@ from django.core.urlresolvers import reverse
 from mitxmako.shortcuts import render_to_response
 
 from xmodule.modulestore.django import modulestore
+from xmodule.modulestore.inheritance import own_metadata
+
 from xmodule.modulestore.exceptions import (
     ItemNotFoundError, InvalidLocationError)
 from xmodule.modulestore import Location
@@ -425,26 +427,35 @@ def textbook_index(request, org, course, name):
 
     org, course, name: Attributes of the Location for the item to edit
     """
-    upload_asset_callback_url = reverse('upload_asset', kwargs={
-        'org': org,
-        'course': course,
-        'coursename': name,
-    })
-    asset_index_url = reverse('asset_index', kwargs={
-        'org': org,
-        'course': course,
-        'name': name,
-    })
-
     course_reference = StaticContent.compute_location(org, course, name)
-    assets_db_objs = contentstore().get_all_content_for_course(course_reference)
+    store = contentstore()
+    assets_db_objs = store.get_all_content_for_course(course_reference)
     assets_json_objs = assets_to_json_dict(assets_db_objs)
+    assets_pdfs = [asset for asset in assets_json_objs if asset["path"].endswith(".pdf")]
     location = get_location_and_verify_access(request, org, course, name)
-    course_obj = modulestore().get_item(location, depth=3)
-    return render_to_response('textbooks.html', {
-        'context_course': course_obj,
-        'course': course_obj,
-        'assets': assets_json_objs,
-        'upload_asset_callback_url': upload_asset_callback_url,
-        'asset_index_url': asset_index_url,
-    })
+    course_module = modulestore().get_item(location, depth=3)
+
+    if request.is_ajax():
+        if request.method == 'GET':
+            return HttpResponse(json.dumps(course_module.pdf_textbooks), content_type="application/json")
+        elif request.method == 'POST':
+            store.update_metadata(course.location, own_metadata(request.POST))
+            return HttpResponse('', content_type="application/json", status=201)
+    else:
+        upload_asset_callback_url = reverse('upload_asset', kwargs={
+            'org': org,
+            'course': course,
+            'coursename': name,
+        })
+        asset_index_url = reverse('asset_index', kwargs={
+            'org': org,
+            'course': course,
+            'name': name,
+        })
+        return render_to_response('textbooks.html', {
+            'context_course': course_module,
+            'course': course_module,
+            'assets': assets_pdfs,
+            'upload_asset_callback_url': upload_asset_callback_url,
+            'asset_index_url': asset_index_url,
+        })