public async Task <QnAResult[]> QueryQnAServiceAsync(string query, QnABotState qnAcontext)
{
var requestUrl = $"{_endpoint.Host}/knowledgebases/{_endpoint.KnowledgeBaseId}/generateanswer";
var request = new HttpRequestMessage(HttpMethod.Post, requestUrl);
var jsonRequest = JsonConvert.SerializeObject(
new
{
question = query,
top = _options.Top,
context = qnAcontext,
strictFilters = _options.StrictFilters,
metadataBoost = _options.MetadataBoost,
scoreThreshold = _options.ScoreThreshold,
}, Formatting.None);
request.Headers.Add("Authorization", $"EndpointKey {_endpoint.EndpointKey}");
request.Content = new StringContent(jsonRequest, System.Text.Encoding.UTF8, "application/json");
var response = await _httpClient.SendAsync(request);
response.EnsureSuccessStatusCode();
var contentString = await response.Content.ReadAsStringAsync();
var result = JsonConvert.DeserializeObject <QnAResultList>(contentString);
return(result.Answers);
}
protected override async Task <(object newState, IEnumerable <Activity> output, object result)> ProcessAsync(object oldState, Activity inputActivity)
{
var resultActivity = new List <Activity>();
QnABotState newState = null;
var query = inputActivity.Text;
var qnaResult = await _qnaService.QueryQnAServiceAsync(query, (QnABotState)oldState);
var qnaAnswer = qnaResult[0].Answer;
var prompts = qnaResult[0].Context?.Prompts;
if (prompts == null || prompts.Length < 1)
{
if (qnaAnswer == "No good match found in KB.")
{
resultActivity.Add(MessageFactory.Text("ขออภัยค่ะ ฉันไม่เข้าใจ"));
resultActivity.Add(MessageFactory.Text("พิมพ์ \"FAQ\" เพื่อกลับสู่บริการตอบคำถาม"));
}
else
{
resultActivity.Add(MessageFactory.Text(qnaAnswer));
resultActivity.Add(MessageFactory.Text("พิมพ์ \"ถามอีกครั้ง\" หรือ \"ถามอีกครั้งได้ไหม\" เพื่อถามเรื่องอื่น ๆ"));
}
}
else
{
// Set bot state only if prompts are found in QnA result
newState = new QnABotState
{
PreviousQnaId = qnaResult[0].Id,
PreviousUserQuery = query
};
resultActivity.Add(CardHelper.GetHeroCard(qnaAnswer, prompts));
}
return(newState, resultActivity, null);
}
private async Task <(object newState, IEnumerable <Activity> output, object result)> QueryQnA(QnABotState oldState, Activity inputActivity)
{
Activity outputActivity = null;
QnABotState newState = null;
// new question
var query = inputActivity.Text;
var qnaResult = await _qnaService.QueryQnAServiceAsync(query, (QnABotState)oldState);
// get answers that are above the two thresholds
var highConfidenceResults = qnaResult.Where(answer => answer.Score > (highConfidenceThreshold * 100)).ToList();
var lowConfidenceResults = qnaResult.Where(answer => answer.Score > (lowConfidenceThreshold * 100)).ToList();
// however, if this query was done after a multi-turn, then we just take the first result, and thus force this first result to be displayed
if (oldState != null && oldState.PreviousPrompts != null)
{
var matchingPrompt = oldState.PreviousPrompts.Where(x => x.DisplayText.ToLower() == query.ToLower());
if (matchingPrompt.Count() > 0)
{
highConfidenceResults = new List <QnAResult>
{
qnaResult.First()
};
}
}
if (highConfidenceResults.Count >= 1)
{
// take the first high confidence match found
var qnaAnswer = highConfidenceResults[0].Answer;
var prompts = highConfidenceResults[0].Context?.Prompts;
var qnaId = highConfidenceResults[0].Id;
// handle prompts, if there are any, as part of the multi-turn structures
if (prompts == null || prompts.Length < 1)
{
outputActivity = MessageHelper.GetMessageActivity(qnaAnswer, inputActivity);
}
else
{
// Set bot state only if prompts are found in QnA result
newState = new QnABotState
{
PreviousQnaId = qnaId,
PreviousUserQuery = query,
PreviousPrompts = prompts
};
outputActivity = CardHelper.GetHeroCard(qnaAnswer, prompts);
}
}
else if (highConfidenceResults.Count == 0 && lowConfidenceResults.Count == 0)
{
// no matches found
outputActivity = MessageHelper.GetMessageActivity(noQnAResults, inputActivity);
}
else
{
// more than 1 match found, so we need to present an opportunity to learn from the user
var suggestedQuestions = new List <string>();
foreach (var qna in lowConfidenceResults)
{
suggestedQuestions.Add(qna.Questions[0]);
}
// Get hero card activity
outputActivity = CardHelper.GetHeroCard(suggestedQuestions, learningCardTitle, learningCardNoMatchText);
newState = new QnALearningState
{
PreviousQnaId = 0,
PreviousUserQuery = inputActivity.Text,
QnAData = lowConfidenceResults
};
}
// return the result
return(newState, new Activity[] { outputActivity }, null);
