private static Card UpdateCard(Card card, Score score)
{
card.LastTrainingDate = DateTime.UtcNow;
card.Score = score;
card.NumberOfRepetitions++;
//If None - return interval
if (score == Score.None)
{
return ResetCard(card);
}
//If first or second time - return interval
if (card.NumberOfRepetitions == 1)
{
card.LastInterval = FirstInterval;
}
else if (card.NumberOfRepetitions == 2)
{
card.LastInterval = SecondInterval;
}
else
{
//Calculate new EF
card.EFactor = CalculateNextEFactor(card.EFactor, score);
//Calculate and return new interval
card.LastInterval = CalculateNextInterval(card.LastInterval, card.EFactor);
}
card.NextDate = DateTime.UtcNow.Date.AddDays(card.LastInterval);
return card;
}
public void UpdateCard(Card card, string ownerID)
{
if (card.Owner.Id == ownerID)
{
cardRepo.Update(card);
}
}
private static Card ResetCard(Card card)
{
card.EFactor = 2.5;
card.NumberOfRepetitions = 0;
card.LastInterval = 0;
card.NextDate = DateTime.UtcNow.Date;
return card;
}
public TrainingDto(Card card, long total, int wordsLeft)
{
ID = card.Id;
Word = card.Word;
Translation = card.Translation;
Total = total;
WordsForToday = wordsLeft;
}
public static Card InitCard(Card card)
{
card.LastTrainingDate = null;
card.Score = Score.None;
card.LastInterval = 0;
card.NumberOfRepetitions = 0;
card.EFactor = 2.5;
card.NextDate = DateTime.UtcNow.Date;
return card;
}
// GET api/training - get next card for training
public ResponseObject Get()
{
var currentUser = new UserService().FindByName(User.Identity.Name);
var cardService = new CardService();
var total = cardService.Count(currentUser.Id);
var drillService = new DrillService();
var cards = drillService.GetCardsForDrill(currentUser.Id);
var currentCard = new Card();
if (cards.Count > 0)
{
currentCard = cards[0];
}
return ResponseObject.Success(new TrainingDto(currentCard, total, cards.Count));
}
public static Card GetUpdatedCard(Card card, Score score)
{
return UpdateCard(card, score);
}
public static DateTime GetNextDate(Card card, Score score)
{
var newCard = UpdateCard(card, score);
return newCard.NextDate;
}
public static int GetInterval(Card card, Score score)
{
var newCard = UpdateCard(card, score);
return newCard.LastInterval;
}
private string Create(string word, string translation, User owner)
{
var card = new Card {Word = word, Translation = translation, Owner = owner};
card = Algorithm.InitCard(card);
card = cardRepo.Add(card);
return card.Id;
}
private string Update(Card card, string word, string translation)
{
card.Word = word;
card.Translation = translation;
cardRepo.Update(card);
return card.Id;
}
public CardDto(Card card)
{
ID = card.Id;
Word = card.Word;
Translation = card.Translation;
}