public async Task <ActionResult> Post()
        {
            var receiveData = "";
            var returnData  = "";

            using (var reader = new StreamReader(Request.Body))
            {
                receiveData = await reader.ReadToEndAsync();
            }

            if (string.IsNullOrEmpty(receiveData))
            {
                return(Ok());
            }
            var receivedMessage = Utility.Parsing(receiveData);
            var keyword         = receivedMessage.events[0].message.text;
            var repo            = new KeywordRepository();

            returnData = repo.QueryByKey(keyword)?.Message;

            if (!string.IsNullOrEmpty(returnData))
            {
                Bot.ReplyMessage(receivedMessage.events[0].replyToken, returnData);
                return(Ok());
            }

            if (keyword.StartsWith("學"))
            {
                var splitStrings = keyword.Split(" ");
                if (splitStrings.Length < 3)
                {
                    Bot.ReplyMessage(receivedMessage.events[0].replyToken, "請用\"學 關鍵字 訊息\" 的格式學習關鍵字");
                }
                else
                {
                    repo.Insert(new Keyword {
                        Key = splitStrings[1], Message = splitStrings[2]
                    });
                    Bot.ReplyMessage(receivedMessage.events[0].replyToken, $"已學習 {splitStrings[1]}");
                }
            }
            else if (keyword.StartsWith("忘記"))
            {
                var splitStrings = keyword.Split(" ");
                if (splitStrings.Length < 2)
                {
                    Bot.ReplyMessage(receivedMessage.events[0].replyToken, "請用\"忘記 關鍵字\" 的忘記關鍵字");
                }
                else
                {
                    repo.Delete(splitStrings[1]);
                    Bot.ReplyMessage(receivedMessage.events[0].replyToken, $"已忘記 {splitStrings[1]}");
                }
            }

            return(Ok());
        }
        public IActionResult Insert(Keyword keyword)
        {
            var repo = new KeywordRepository();

            return(Ok(repo.Insert(keyword)));
        }