public ActionResult AddLinkRequest(int itemId, string link)
        {
            //store new item, link and new comment(if not null)
            DataRepository helper = new DataRepository();

            if (!helper.linkExists(link, itemId))
                helper.AddLink(link, itemId, Session["Username"].ToString());
            else
            {
                helper.LikeLinkInstead(link, itemId);
                TempData["LinkExists"] = "That link has already been added against this recommendation. We have liked this link instead.";
            }

            Item item = helper.getItemById(itemId.ToString());

            return RedirectToAction("Discussion", new {Id = item.Username, state = "Network", itemId = itemId });
        }