Merge branch 'master' into 142993479-tags

models/comment.js

@@ -4,6 +4,8 @@ const TagLinkSchema = require('./schema/tag_link');
 const uuid = require('uuid');
 const COMMENT_STATUS = require('./enum/comment_status');
 
+const EDIT_WINDOW_MS = 30 * 1000; // 30 seconds
+
 /**
  * The Mongo schema for a Comment Status.
  * @type {Schema}
@@ -91,7 +93,16 @@ CommentSchema.index({
   background: false
 });
 
+CommentSchema.virtual('edited').get(function() {
+  return this.body_history.length > 1;
+});
+
+CommentSchema.virtual('editableUntil').get(function() {
+  return new Date(Number(this.created_at) + EDIT_WINDOW_MS);
+});
+
 // Comment model.
 const Comment = mongoose.model('Comment', CommentSchema);
 
 module.exports = Comment;
+module.exports.EDIT_WINDOW_MS = EDIT_WINDOW_MS;

models/user.js

@@ -196,7 +196,8 @@ const USER_GRAPH_OPERATIONS = [
   'mutation:suspendUser',
   'mutation:setCommentStatus',
   'mutation:addTag',
-  'mutation:removeTag'
+  'mutation:removeTag',
+  'mutation:editComment'
 ];
 
 /**