public PracticeModel(TopicModel topic)
: base()
{
DataRowView grammar = AdoUtils.GetDataView(topic.RowView, Strings.TABLE_GRAMMAR)[0];
CultureInfo nativeInfo = AdoUtils.GetCultureInfo(grammar, Strings.COL_NATIVE_LANG);
if (nativeInfo != null)
_nativeLang = nativeInfo.NativeName;
CultureInfo targetInfo = AdoUtils.GetCultureInfo(grammar, Strings.COL_TARGET_LANG);
if (targetInfo != null)
_targetLang = targetInfo.NativeName;
_showRuleText = (bool)grammar[Strings.COL_SHOWRULE];
_state = PracticeState.Invalid;
_examples = new Queue<DataRowView>();
IList<DataRowView> list = new List<DataRowView>();
AddTopic(list, topic.RowView);
if ((bool)grammar[Strings.COL_SHUFFLE])
ListUtils.Shuffle(list);
foreach (DataRowView example in list)
_examples.Enqueue(example);
Next();
}
private void ComputeNextCardType(
out PracticeState state,
out bool lapsing)
{
int total = DueCount + LearnCount + NewCount;
if (total == 0)
{
throw new InvalidOperationException("Card count exhausted");
}
int rnd = Random.Next(0, total);
if (rnd < DueCount)
{
state = PracticeState.Due;
}
else if (rnd < DueCount + LearnCount)
{
state = PracticeState.Learning;
}
else
{
state = PracticeState.New;
}
if (LapseCount > 0 &&
(state == PracticeState.Due ||
state == PracticeState.Learning))
{
int lapseTotal = DueCount + LearnCount;
lapsing = Random.Next(0, lapseTotal) < LapseCount;
if (lapsing)
{
LapseCount--;
}
}
else
{
lapsing = false;
}
}
//
// Misc helper
public static Card MakeCard(
CollectionConfig config,
PracticeState state,
int due = -1,
float eFactor = 2.5f,
int interval = 1,
int reviews = 0,
int lapses = 0)
{
return(new Card(config)
{
PracticeState = state,
Due = due == -1 ? DateTime.Now.AddSeconds(60).ToUnixTimestamp() : due,
EFactor = eFactor,
Interval = interval,
Reviews = reviews,
Lapses = lapses
});
}
public bool Equals(PracticeState other)
{
return(_value == other._value);
}
//
// Core methods
public override bool Equals(object obj)
{
PracticeState otherObj = (PracticeState)obj;
return(otherObj._value == this._value);
}
public void Next()
{
if (_examples.Count > 0)
{
DataRowView previous = _current;
_current = _examples.Dequeue();
_state = PracticeState.Question;
_targetTextAnswer = PrepareAnswerTemplate((String)_current[Strings.COL_TARGET_TEXT]);
NotifyPropertyChanged();
if (previous == null || !previous[Strings.COL_RULE_ID].Equals(_current[Strings.COL_RULE_ID]))
if (_ruleTextChanged != null)
_ruleTextChanged(this, new EventArgs());
}
}
public void Answer()
{
_state = PracticeState.Answer;
_isAnswerCorrect = NormalizeString(TargetText) == NormalizeString(_targetTextAnswer);
NotifyPropertyChanged();
}
public static bool IsValid(this PracticeState state)
{
return(state >= 0);
}
