PLT-6610 sending websocket event for last channel viewed (#6787)

app/post.go

@@ -48,6 +48,12 @@ func CreatePostAsUser(post *model.Post) (*model.Post, *model.AppError) {
 			if result := <-Srv.Store.Channel().UpdateLastViewedAt([]string{post.ChannelId}, post.UserId); result.Err != nil {
 				l4g.Error(utils.T("api.post.create_post.last_viewed.error"), post.ChannelId, post.UserId, result.Err)
 			}
+
+			if *utils.Cfg.ServiceSettings.EnablChannelViewedMessages {
+				message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_CHANNEL_VIEWED, "", "", post.UserId, nil)
+				message.Add("channel_id", post.ChannelId)
+				go Publish(message)
+			}
 		}
 
 		return rp, nil