//POST: Rename Picture
        public ActionResult Rename(PictureModel picture)
        {
            //TODO: Check if ModelState is valid
            if (ModelState.IsValid)
            {
                //TODO: Tell picture manager to rename picture
                var isRenamed = _pictureManager.RenamePicture(picture);

                //TODO: If rename is successfull, do the following
                if (isRenamed)
                {
                    //TODO: Return to index with success alert msg
                    TempData[Alert.AlertMsgKey]  = "Picture has been renamed successfully";
                    TempData[Alert.AlertTypeKey] = Alert.AlertSuccess;
                    return(RedirectToAction("Index", "Picture", new { albumID = picture.AlbumID, alert = true }));
                }
                //TODO: On failure to rename, return to index with error alert
                TempData[Alert.AlertMsgKey]  = "Sorry, picture couldn't be renamed. Please try again";
                TempData[Alert.AlertTypeKey] = Alert.AlertDanger;
                return(RedirectToAction("Index", "Picture", new { albumID = picture.AlbumID, alert = true }));
            }
            //TODO: If ModelState isn't valid, return to index with error alert
            TempData[Alert.AlertMsgKey]  = "Sorry, picture couldn't be renamed. Please try again";
            TempData[Alert.AlertTypeKey] = Alert.AlertDanger;
            return(RedirectToAction("Index", "Picture", new { albumID = picture.AlbumID, alert = true }));
        }