public void Back()
{
int i = _history.Back(_currentParagraph.Id);
if (i != -1)
{
_currentParagraph = _book[i];
CurrentParagraphChanged?.Invoke(this, new EventArgs());
}
}
public void SetNewBook(IBook book, IHistory history)
{
if (history != null & book != null)
{
_book = book;
_history = history;
_currentParagraph = _book[_history.GetCurrentParagraphId];
}
CurrentParagraphChanged?.Invoke(this, new EventArgs());
}
public void Next(string answer)
{
int i = _currentParagraph.NextParagraphId(answer);
if (i >= 0)
{
_history.AddInAlreadyRead(_currentParagraph.Id);
_history.AddInHistory(i);
_currentParagraph = _book[i];
CurrentParagraphChanged?.Invoke(this, new EventArgs());
}
}
public void Reset()
{
_history.Reset();
_currentParagraph = _book[0];
CurrentParagraphChanged?.Invoke(this, new EventArgs());
}
public void GoTo(int id)
{
_currentParagraph = _book[_history.GoTo(id)];
CurrentParagraphChanged?.Invoke(this, new EventArgs());
}
