subscription on comments

schema.graphql

@@ -95,6 +95,19 @@ type TopicResult {
 	topic: Topic
 }
 
+enum CommentStatus {
+	NEW
+	UPDATED
+	UPDATED_RATING
+	DELETED
+}
+
+type CommentUpdatedResult {
+	error: String
+	status: CommentStatus
+	comment: Comment
+}
+
 ################################### Mutation
 
 type Mutation {
@@ -192,6 +205,7 @@ type Subscription {
 	shoutUpdated: Shout!
 	userUpdated: User!
 	topicUpdated(user_id: Int!): Shout!
+	commentUpdated(shout: String!): CommentUpdatedResult!
 }
 
 ############################################ Entities