private ChannelQuestionAndAnswer FindQuestionAndAnswer(string message)
{
if (string.IsNullOrEmpty(message))
{
return(null);
}
if (_qas.ContainsKey(message))
{
return(_qas[message]);
}
var timeLength = TimeFormat.Length;
var qHeaderLength = QuestionHeader.Length;
var aHeaderLenght = AnswerHeader.Length;
if (message.Length >= (timeLength + qHeaderLength))
{
DateTime time;
if (DateTime.TryParse(message.Substring(0, timeLength), out time))
{
var header = message.Substring(timeLength, qHeaderLength);
if (header == QuestionHeader)
{
var content = message.Substring(timeLength + qHeaderLength);
var isQuestioner = false;
var key = GetQuestionAndAnswerKey(time, isQuestioner);
lock (_qaLocker)
{
if (_qas.ContainsKey(key))
{
return(_qas[key]);
}
var qa = new ChannelQuestionAndAnswer(this, content, time, isQuestioner);
_qas.Add(key, qa);
return(qa);
}
}
else
{
header = message.Substring(timeLength, aHeaderLenght);
if (header == AnswerHeader)
{
var content = message.Substring(timeLength + aHeaderLenght);
var isQuestioner = true;
var key = GetQuestionAndAnswerKey(time, isQuestioner);
lock (_qaLocker)
{
if (_qas.ContainsKey(key))
{
var qa = _qas[key];
qa.Answer = content;
qa.AnswerTime = DateTime.Now;
return(qa);
}
}
}
}
}
}
return(null);
}
public async Task <IAnswerResult> Request(string question, int timeoutMilliseconds)
{
RefreshQA();
var qa = new ChannelQuestionAndAnswer(this, question, DateTime.Now, true);
var key = this.GetQuestionAndAnswerKey(qa);
var message = GetQuestionMessage(qa);
lock (_qaLocker)
{
if (_qas.ContainsKey(key) == false)
{
_qas.Add(key, qa);
}
else
{
return(new AnswerResult(false, "请求重复!"));
}
}
var time = 0;
do
{
await this.Send(message);
await Task.Delay(500);
time += 500;
} while (qa.IsAnswered == false && time < timeoutMilliseconds);
var isAnswered = qa.IsAnswered;
var response = isAnswered ? qa.Answer : "超时未响应";
return(new AnswerResult(isAnswered, response));
}
public async Task Answer(ChannelQuestionAndAnswer answer)
{
if (answer != null && answer.IsAnswered)
{
var message = GetAnswerMessage(answer);
await this.Send(message);
}
}
public string GetAnswerMessage(ChannelQuestionAndAnswer answer) => answer.IsAnswered ? $"{answer.QuestionTime.ToString(TimeFormat)}{AnswerHeader}{answer.Answer}" : null;
public string GetQuestionMessage(ChannelQuestionAndAnswer answer) => $"{answer.QuestionTime.ToString(TimeFormat)}{QuestionHeader}{answer.Question}";
private string GetQuestionAndAnswerKey(ChannelQuestionAndAnswer answer) => $"{answer.QuestionTime.ToString(TimeFormat)}{(answer.IsQuestioner ? "Q" : "A")}";
