[Bot Framework] 應用微軟Cognitive Services實作LUIS Bot (III), 實作LUIS Bot

首先,

建立一個Score.cs來表達分數

public class Score     {         public Score(string user, int point, DateTime dateTime)         {             User = user;             Point = point;             DateTime = dateTime;         }         public string User { get; set; }         public int Point { get; set; }         public DateTime DateTime { get; set; }         public override string ToString()         {             StringBuilder sb =new StringBuilder();             sb.Append($"User:{User}, Score:{Point}, Date: {DateTime}");             return sb.ToString();         }     }

再來, 我們建立Repository 負責資料存取(為了簡化說明所以沒有特意去串DB,而是直接將分數的資料建出來)

public interface IRepository<T> where T:class     {        IEnumerable<T> GetAll();     }     public class ScoreRepository:IRepository<Score>     {         public  IEnumerable<Score> GetAll()         {             var scores = new List<Score>();             scores.Add(new Score("Andy", 7, DateTime.Now));             scores.Add(new Score("Andy", 20, DateTime.Now.AddDays(-7)));             scores.Add(new Score("Andy", 13, DateTime.Now));             scores.Add(new Score("Bob", 6, DateTime.Now));             scores.Add(new Score("Bob", 19, DateTime.Now));             scores.Add(new Score("Calvin", 35, DateTime.Now.AddDays(-30)));             return scores;         }     }

建立Service 負責處理較複雜的商業邏輯來獲得最的高分數(這邊_scoRepository 宣告為Interface的目的是想提高程式的可測試性,將來做Unit test的時候我們就可以去Mock Repository)

public class ScoreService     {         private IRepository<Score> _scoRepository;         public ScoreService(IRepository<Score> scoRepository)         {             this._scoRepository = scoRepository;         }         public string GetHighScore()         {             return _scoRepository.GetAll().OrderByDescending(x => x.Point).FirstOrDefault()?.ToString();         }         public string GetHighScore(DateTime periodOfTime)         {             return _scoRepository.GetAll().Where(t => t.DateTime >= periodOfTime).OrderByDescending(x => x.Point).FirstOrDefault()?.ToString();         }     }

建立LUIS Dialog 處理對話

[LuisModel("Your APP ID", "Your secret key")]     [Serializable]     public class LUISDialog: LuisDialog<object>     {        // Implement None Intent        // Implement HighScore Intent     }

在 LUIS dialog中為None Intent 新增一個方法

[LuisIntent("")]         [LuisIntent("None")]         public async Task None(IDialogContext context, LuisResult result)         {             // Not a match -- Start a new Game             //context.Call(new NumberGuesserDialog(), null);             var reply = context.MakeMessage();             reply.Text = "Sorry, I didn't get it";             //Make you cortana speak             reply.Speak = "Sorry, I can't understand";             await context.PostAsync(reply);             context.Wait(this.MessageReceived);         }

實作回復最得高分的程式碼

private async Task ShowHighScores(IDialogContext context, int paramDays)         {             // Get Yesterday             var ParamYesterday = DateTime.Now.AddDays(paramDays);             ScoreService scoreService=new ScoreService(new ScoreRepository());             var scoreRecord = scoreService.GetHighScore(ParamYesterday);             // Create a reply message             var resultMessage = context.MakeMessage();             resultMessage.Type = "message";             resultMessage.Text = scoreRecord;             resultMessage.Speak = scoreRecord;             // Send Message             await context.PostAsync(resultMessage);         }

由於LUIS傳回來的Entity不見得會是數字
(例如:show me the high score for the past two days, 其中two 就是Entity)
所以我們須將英文數字轉成int, 讓我們等一下在做日期加減時能夠正常運算

static int ParseEnglish(string number)         {             string[] words = number.ToLower().Split(new char[] {' ', '-', ','}, StringSplitOptions.RemoveEmptyEntries);             string[] ones = {"one", "two", "three", "four", "five", "six", "seven", "eight", "nine"};             string[] teens =                 {"eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};             string[] tens = {"ten", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"};             Dictionary<string, int> modifiers = new Dictionary<string, int>()             {                 {"billion", 1000000000},                 {"million", 1000000},                 {"thousand", 1000},                 {"hundred", 100}             };             if (number == "eleventy billion")                 return int.MaxValue; // 110,000,000,000 is out of range for an int!             int result = 0;             int currentResult = 0;             int lastModifier = 1;             foreach (string word in words)             {                 if (modifiers.ContainsKey(word))                 {                     lastModifier *= modifiers[word];                 }                 else                 {                     int n;                     if (lastModifier > 1)                     {                         result += currentResult * lastModifier;                         lastModifier = 1;                         currentResult = 0;                     }                     if ((n = Array.IndexOf(ones, word) + 1) > 0)                     {                         currentResult += n;                     }                     else if ((n = Array.IndexOf(teens, word) + 1) > 0)                     {                         currentResult += n + 10;                     }                     else if ((n = Array.IndexOf(tens, word) + 1) > 0)                     {                         currentResult += n * 10;                     }                     else if (word != "and")                     {                         throw new ApplicationException("Unrecognized word: " + word);                     }                 }             }             return result + currentResult * lastModifier;         }

在 LUIS dialog中為HighScore Intent 新增一個方法

[LuisIntent("HighScores")]         public async Task GetHighScore(IDialogContext context, LuisResult result)         {             bool isIntentMatch = false;             foreach (var objIntent in result.Intents)             {                 if (objIntent.Intent == "HighScores" && objIntent.Score >= .98f)                 {                     isIntentMatch = true;                 }             }             if (!isIntentMatch)             {                 var reply = context.MakeMessage();                 reply.Type = "message";                 reply.Text = "I don't understand";                 reply.Speak = "I don't understand";                 await context.PostAsync(reply);                 context.Wait(this.MessageReceived);                 return;             }             // Determine the days in the past             // to search for High Scores             int intDays = -1;             #region PeriodOfTime             EntityRecommendation PeriodOfTime;             if (result.TryFindEntity("PeriodOfTime", out PeriodOfTime))             {                 switch (PeriodOfTime.Entity)                 {                     case "month":                         intDays = -30;                         break;                     case "day":                         intDays = -1;                         break;                     case "week":                         intDays = -7;                         break;                     default:                         intDays = -1;                         break;                 }             }             #endregion             #region Days             EntityRecommendation Days;             if (result.TryFindEntity("Days", out Days))             {                 // Set Days                 int intTempDays;                 if (int.TryParse(Days.Entity, out intTempDays))                 {                     // A Number was passed                     intDays = (Convert.ToInt32(intTempDays) * (-1));                 }                 else                 {                     // A number was not passed                     // Call ParseEnglish Method                     // From: http://stackoverflow.com/questions/11278081/convert-words-string-to-int                     intTempDays = ParseEnglish(Days.Entity);                     intDays = (Convert.ToInt32(intTempDays) * (-1));                 }                 // 30 days maximum                 if (intDays > 30)                 {                     intDays = 30;                 }             }             #endregion             await ShowHighScores(context, intDays);             context.Wait(this.MessageReceived);         }

最後在MessagesController.cs中使用LUISDialog

public async Task<HttpResponseMessage> Post([FromBody]Activity activity)         {             if (activity.Type == ActivityTypes.Message)             {                 Conversation.SendAsync(activity, ()=> new LUISDialog());             }             else             {                 HandleSystemMessage(activity);             }             var response = Request.CreateResponse(HttpStatusCode.OK);             return response;         }

做到這裡差不多可以收工了><

以下是測試結果:



Source code:
https://github.com/andy51002000/MyLUISBot.git