only show edit button when user can edit

lms/djangoapps/django_comment_client/forum/views.py

@@ -78,9 +78,23 @@ def forum_form_discussion(request, course_id, discussion_id):
 
 def render_single_thread(request, course_id, thread_id):
     
+    def get_annotated_content_info(thread, user_id):
+        infos = {}
+        def _annotate(content):
+            infos[str(content['id'])] = {
+                'editable': str(content['user_id']) == str(user_id), # TODO may relax this to instructors
+            }
+            for child in content['children']:
+                _annotate(child)
+        _annotate(thread)
+        return infos
+
+    thread = comment_client.get_thread(thread_id, recursive=True)
+
     context = {
-        'thread': comment_client.get_thread(thread_id, recursive=True),
+        'thread': thread,
         'user_info': comment_client.get_user_info(request.user.id, raw=True),
+        'annotated_content_info': json.dumps(get_annotated_content_info(thread=thread, user_id=request.user.id)),
         'tags': comment_client.get_threads_tags(raw=True),
         'course_id': course_id,
     }

lms/static/coffee/src/discussion.coffee

@@ -197,7 +197,7 @@ Discussion =
       else
         view = {
           id: id
-          showWatchCheckbox: $discussionContent.parent(".thread").attr("_id") not in $$user_info.subscribed_thread_ids
+          showWatchCheckbox: $discussionContent.parents(".thread").attr("_id") not in $$user_info.subscribed_thread_ids
         }
         $discussionContent.append Mustache.render Discussion.replyTemplate, view
         Markdown.makeWmdEditor $local(".reply-body"), "-reply-body-#{id}", Discussion.urlFor('upload')
@@ -339,6 +339,11 @@ Discussion =
     raw_text = $local(".content-body").html()
     converter = Markdown.getMathCompatibleConverter()
     $local(".content-body").html(converter.makeHtml(raw_text))
+    id = $content.attr("_id")
+    if not ($$annotated_content_info[id] || [])['editable']
+      $local(".discussion-edit").remove()
+
+    
 
   bindDiscussionEvents: (discussion) ->
     $discussion = $(discussion)

lms/templates/discussion/single_thread.html

@@ -14,4 +14,5 @@
   var $$user_info = JSON.parse('${user_info | escape_quotes}');
   var $$course_id = "${course_id}";
   var $$tags = JSON.parse("${tags | escape_quotes}");
+  var $$annotated_content_info = JSON.parse("${annotated_content_info | escape_quotes}");
 </script>