private ReviewCollectionAsyncBase GetNextCardSource()
{
int newReviewCount = ReviewCollectionNew.ReviewCount();
int learnReviewCount = ReviewCollectionLearn.ReviewCount();
int dueReviewCount = ReviewCollectionDue.ReviewCount();
int totalReviewCount = newReviewCount + learnReviewCount + dueReviewCount;
int rnd = _random.Next(0, totalReviewCount);
if (rnd < newReviewCount)
{
return(ReviewCollectionNew);
}
if (rnd < newReviewCount + learnReviewCount)
{
return(ReviewCollectionLearn);
}
if (rnd < newReviewCount + learnReviewCount + dueReviewCount)
{
return(ReviewCollectionDue);
}
return(null);
}
/// <summary>State-dependent counts of cards to be reviewed.</summary>
/// <param name="state">The state.</param>
/// <returns>State-dependent card count.</returns>
public int CountByState(CardPracticeStateFilterFlag state)
{
int ret = 0;
if ((state & CardPracticeStateFilterFlag.Due) == CardPracticeStateFilterFlag.Due)
{
ret += ReviewCollectionDue.ReviewCount();
}
if ((state & CardPracticeStateFilterFlag.Learning) == CardPracticeStateFilterFlag.Learning)
{
ret += ReviewCollectionLearn.ReviewCount();
}
if ((state & CardPracticeStateFilterFlag.New) == CardPracticeStateFilterFlag.New)
{
ret += ReviewCollectionNew.ReviewCount();
}
return(ret);
}
/// <summary>Answer current card and fetch next one.</summary>
/// <param name="grade">Answer grade</param>
/// <returns>Whether any cards are available</returns>
/// <exception cref="System.InvalidOperationException">No card available (Current is null).</exception>
public Task <bool> AnswerAsync(Grade grade)
{
// Card sanity check
Card card = Current;
if (card == null)
{
throw new InvalidOperationException("Card unavailable");
}
// Compute evaluation time & create review log
ReviewLog log = CreateLog(card);
// Answer
NextAction[CurrentList] = () => CurrentList.MoveNextAsync();
CurrentList = null;
CardAction cardAction = card.Answer(grade);
// Complete log with updated values
CompleteLog(log, card, grade);
// If this was a new card, add to learning list
if (log.LastState == PracticeState.New)
{
ReviewCollectionLearn.AddManual(card);
}
#pragma warning disable 4014
// Save changes to Database
UpdateCardAsync(log, card, cardAction);
#pragma warning restore 4014
ReviewCollectionNew.DismissSiblings(card);
ReviewCollectionLearn.DismissSiblings(card);
ReviewCollectionDue.DismissSiblings(card);
return(DoNextAsync());
}
private async Task <bool> InitializeAsync(CollectionConfig config)
{
_cardTableName =
(await _db.GetTableMappingAsync <Card>().ConfigureAwait(false)).GetTableName();
ReviewSession reviewSession =
await ReviewSession.ComputeSessionAsync(_db, config).ConfigureAwait(false);
ReviewCollectionNew = new ReviewCollectionNew(_db, config, reviewSession.New);
ReviewCollectionLearn = new ReviewCollectionLearn(_db);
ReviewCollectionDue = new ReviewCollectionDue(_db, reviewSession.Due);
NextAction[ReviewCollectionNew] = () => ReviewCollectionNew.MoveNextAsync();
NextAction[ReviewCollectionLearn] = () => ReviewCollectionLearn.MoveNextAsync();
NextAction[ReviewCollectionDue] = () => ReviewCollectionDue.MoveNextAsync();
await
Task.WhenAll(
ReviewCollectionNew.IsInitializedAsync(), ReviewCollectionLearn.IsInitializedAsync(),
ReviewCollectionDue.IsInitializedAsync()).ConfigureAwait(false);
return(await DoNextAsync().ConfigureAwait(false));
}