Merge pull request #426 from MITx/feature/halogenandtoast/multiple_textbooks

Feature/halogenandtoast/multiple textbooks

common/lib/xmodule/xmodule/course_module.py

 from fs.errors import ResourceNotFoundError
 import time
 import logging
+from lxml import etree
 
 from xmodule.util.decorators import lazyproperty
 from xmodule.graders import load_grading_policy
@@ -10,12 +11,28 @@ from xmodule.timeparse import parse_time, stringify_time
 
 log = logging.getLogger(__name__)
 
-
 class CourseDescriptor(SequenceDescriptor):
     module_class = SequenceModule
 
+    class Textbook:
+        def __init__(self, title, table_of_contents_url):
+            self.title = title
+            self.table_of_contents_url = table_of_contents_url
+
+        @classmethod
+        def from_xml_object(cls, xml_object):
+            return cls(xml_object.get('title'), xml_object.get('table_of_contents_url'))
+
+        @property
+        def table_of_contents(self):
+            raw_table_of_contents = open(self.table_of_contents_url, 'r') # TODO: This will need to come from S3
+            table_of_contents = etree.parse(raw_table_of_contents).getroot()
+            return table_of_contents
+
+
     def __init__(self, system, definition=None, **kwargs):
         super(CourseDescriptor, self).__init__(system, definition, **kwargs)
+        self.textbooks = self.definition['data']['textbooks']
 
         msg = None
         if self.start is None:
@@ -28,6 +45,16 @@ class CourseDescriptor(SequenceDescriptor):
         self.enrollment_start = self._try_parse_time("enrollment_start")
         self.enrollment_end = self._try_parse_time("enrollment_end")
 
+    @classmethod
+    def definition_from_xml(cls, xml_object, system):
+        textbooks = []
+        for textbook in xml_object.findall("textbook"):
+            textbooks.append(cls.Textbook.from_xml_object(textbook))
+            xml_object.remove(textbook)
+        definition =  super(CourseDescriptor, cls).definition_from_xml(xml_object, system)
+        definition.setdefault('data', {})['textbooks'] = textbooks
+        return definition
+
     def has_started(self):
         return time.gmtime() > self.start
 
@@ -53,7 +80,6 @@ class CourseDescriptor(SequenceDescriptor):
 
         return grading_policy
 
-
     @lazyproperty
     def grading_context(self):
         """

lms/djangoapps/staticbook/views.py

@@ -6,19 +6,17 @@ from courseware.courses import get_course_with_access
 from lxml import etree
 
 @login_required
-def index(request, course_id, page=0):
+def index(request, course_id, book_index, page=0):
     course = get_course_with_access(request.user, course_id, 'load')
     staff_access = has_access(request.user, course, 'staff')
 
-    # TODO: This will need to come from S3
-    raw_table_of_contents = open('lms/templates/book_toc.xml', 'r')
-    table_of_contents = etree.parse(raw_table_of_contents).getroot()
+    textbook = course.textbooks[int(book_index)]
+    table_of_contents = textbook.table_of_contents
 
     return render_to_response('staticbook.html',
                               {'page': int(page), 'course': course,
                                'table_of_contents': table_of_contents,
                                'staff_access': staff_access})
 
-
 def index_shifted(request, course_id, page):
     return index(request, course_id=course_id, page=int(page) + 24)

lms/templates/course_navigation.html

@@ -21,7 +21,9 @@ def url_class(url):
       <li class="info"><a href="${reverse('info', args=[course.id])}" class="${url_class('info')}">Course Info</a></li>
 % if user.is_authenticated():
 % if settings.MITX_FEATURES.get('ENABLE_TEXTBOOK'):
-      <li class="book"><a href="${reverse('book', args=[course.id])}" class="${url_class('book')}">Textbook</a></li>
+      % for index, textbook in enumerate(course.textbooks):
+          <li class="book"><a href="${reverse('book', args=[course.id, index])}" class="${url_class('book')}">${textbook.title}</a></li>
+      % endfor
 % endif 
 % if settings.MITX_FEATURES.get('ENABLE_DISCUSSION'):
       <li class="discussion"><a href="${reverse('questions')}">Discussion</a></li>

lms/urls.py

@@ -126,9 +126,9 @@ if settings.COURSEWARE_ENABLED:
         #Inside the course
         url(r'^courses/(?P<course_id>[^/]+/[^/]+/[^/]+)/info$',
             'courseware.views.course_info', name="info"),
-        url(r'^courses/(?P<course_id>[^/]+/[^/]+/[^/]+)/book$',
+        url(r'^courses/(?P<course_id>[^/]+/[^/]+/[^/]+)/book/(?P<book_index>[^/]*)/$',
             'staticbook.views.index', name="book"),
-        url(r'^courses/(?P<course_id>[^/]+/[^/]+/[^/]+)/book/(?P<page>[^/]*)$',
+        url(r'^courses/(?P<course_id>[^/]+/[^/]+/[^/]+)/book/(?P<book_index>[^/]*)/(?P<page>[^/]*)$',
             'staticbook.views.index'),
         url(r'^courses/(?P<course_id>[^/]+/[^/]+/[^/]+)/book-shifted/(?P<page>[^/]*)$',
             'staticbook.views.index_shifted'),