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lms/djangoapps/django_comment_client/utils.py

@@ -0,0 +1,93 @@
+from importlib import import_module
+from courseware.models import StudentModuleCache
+from courseware.module_render import get_module
+from xmodule.modulestore import Location
+from xmodule.modulestore.django import modulestore
+
+from django.conf import settings
+import operator
+import itertools
+
+_FULLMODULES = None
+_DISCUSSIONINFO = None
+
+def get_full_modules():
+    global _FULLMODULES
+    if not _FULLMODULES:
+        class_path = settings.MODULESTORE['default']['ENGINE']
+        module_path, _, class_name = class_path.rpartition('.')
+        class_ = getattr(import_module(module_path), class_name)
+        modulestore = class_(eager=True, **settings.MODULESTORE['default']['OPTIONS'])
+        _FULLMODULES = modulestore.modules
+    return _FULLMODULES
+
+def get_categorized_discussion_info(request, course):
+    """
+        return a dict of the form {category: modules}
+    """
+    global _DISCUSSIONINFO
+    if not _DISCUSSIONINFO:
+        initialize_discussion_info(request, course)
+    return _DISCUSSIONINFO['categorized']
+
+def get_discussion_title(request, course, discussion_id):
+    global _DISCUSSIONINFO
+    if not _DISCUSSIONINFO:
+        initialize_discussion_info(request, course)
+    title = _DISCUSSIONINFO['by_id'].get(discussion_id, {}).get('title', '(no title)')
+    if title == '(no title)':
+        print "title shouldn't be none"
+        import pdb; pdb.set_trace()
+    return title
+
+def initialize_discussion_info(request, course):
+
+    global _DISCUSSIONINFO
+    if _DISCUSSIONINFO:
+        return
+
+    course_id = course.id
+    _, course_name, _ = course_id.split('/')
+    user = request.user
+    url_course_id = course_id.replace('/', '_').replace('.', '_')
+
+    _is_course_discussion = lambda x: x[0].dict()['category'] == 'discussion' \
+                         and x[0].dict()['course'] == course_name
+    
+    _get_module_descriptor = operator.itemgetter(1)
+
+    def _get_module(module_descriptor):
+        print module_descriptor
+        module = get_module(user, request, module_descriptor.location, student_module_cache)[0]
+        return module
+
+    def _extract_info(module):
+        return {
+            'title': module.title,
+            'discussion_id': module.discussion_id,
+            'category': module.discussion_category,
+        }
+
+    def _pack_with_id(info):
+        return (info['discussion_id'], info)
+
+    discussion_module_descriptors = map(_get_module_descriptor,
+                                        filter(_is_course_discussion,
+                                               get_full_modules().items()))
+
+    student_module_cache = StudentModuleCache(user, course)
+
+    discussion_info = map(_extract_info, map(_get_module, discussion_module_descriptors))
+
+    _DISCUSSIONINFO = {}
+
+    _DISCUSSIONINFO['by_id'] = dict(map(_pack_with_id, discussion_info))
+
+    _DISCUSSIONINFO['categorized'] = dict((category, list(l)) \
+                for category, l in itertools.groupby(discussion_info, operator.itemgetter('category')))
+
+    _DISCUSSIONINFO['categorized']['General'] = [{
+        'title': 'General discussion',
+        'discussion_id': url_course_id,
+        'category': 'General',
+    }]