private Pair GetBestQuestinPairByScore(IList <UserPairScoreNormalization> pairs)
{
var unbindedPair = pairs.OrderBy(p => p.UserScoreNormalization)
.ThenByDescending(p => p.TotalCommunityScore)
.ThenBy(p => p.RandomValue).FirstOrDefault();
return(PairCache.Where(p => p.Id == unbindedPair.PairID).FirstOrDefault());
}
public async Task <ApiModels.QuestionBinding> GetQuestion(int userId, int userClientId, int dictionaryId, int questionTypeId)
{
//var dictionary = CacheProvider.Dictionaries.Where(d => d.Id == dictionaryId).FirstOrDefault();
//if (dictionary == null)
//throw new NullReferenceException(string.Format("Dictionary not exist with DictionaryID:{0}", dictionaryId));
if (questionTypeId < 1 || questionTypeId > 2)
{
throw new ArgumentOutOfRangeException(string.Format("Invalid QuestionTypeID {0}", questionTypeId));
}
if (CacheProvider.Pairs.Count < 5)
{
throw new InvalidOperationException("Not enough pair for dictionary");
}
var unansweredQuestion = await GetUnansweredQuestion(userClientId, dictionaryId);
var rankList = GetAllUserRanksByDictionaryId(userId, dictionaryId);
var userRank = rankList.FirstOrDefault(r => r.UserId == userId);
if (unansweredQuestion != null)
{
var unansweredPair = PairCache.Where(p => p.Id == unansweredQuestion.PairID).FirstOrDefault();
var targetSoundEx = unansweredPair.SoundEx1;
if (unansweredQuestion.QuestionWordNumber == 2)
{
targetSoundEx = unansweredPair.SoundEx2;
}
var wrongPairs = await GetWrongPairs(targetSoundEx, unansweredQuestion.QuestionWordNumber, dictionaryId, unansweredPair.Id);
return(ModelFactory.ToQuestionBinding(unansweredQuestion, unansweredPair, wrongPairs, null));
}
var communityScore = await GetCommunityScore(userId, dictionaryId);
var unbindPair = await GenerateUnpairQuestion(communityScore, dictionaryId);
int numberOfWord = Convert.ToInt32(Math.Floor(new Random().NextDouble() * (3 - 1) + 1));
var question = AddNewQuestionWithUnbindPair(unbindPair, userClientId, numberOfWord);
await RefreshCaches(true);
var wrongPairList = await GetWrongPairs(unbindPair.SoundEx1, numberOfWord, dictionaryId, unbindPair.Id);
var questionBind = ModelFactory.ToQuestionBinding(question, unbindPair, wrongPairList, null);
return(await Task.FromResult(questionBind));
}
private bool CheckAnswer(Question question, ApiModels.Answer answer)
{
var pair = PairCache.Where(p => p.Id == question.PairID).FirstOrDefault();
if (question.QuestionWordNumber == 1)
{
return(string.Compare(pair.InLanguage2, answer.AnswerText, true) == 0);
}
else
{
return(string.Compare(pair.InLanguage1, answer.AnswerText, true) == 0);
}
}
