/// <summary>
/// Returns a string value indicating the answer (first character), the state (second character), and the
/// user's answer (third character).
/// </summary>
/// <param name="includeUserAnswer"></param>
/// <returns></returns>
internal string ToString(bool includeUserAnswer)
{
StringBuilder sTemp = new StringBuilder(); // Instantiate a new String Builder class.
sTemp.Append(Answer.ToString()); // Append the answer.
sTemp.Append(CellState.GetHashCode()); // Append the cell state as a numeric value.
if (includeUserAnswer) // Do we need to include the user's answer?
{
sTemp.Append(UserAnswer.ToString()); // Yes, include the user's answer.
}
return(sTemp.ToString()); // Return the resulting string.
}
private void NextIssue(object o)
{
CurrentIssue.IsAnswered = true;
// Save answer
var isCorrect = false;
switch (IssueType)
{
case IssueTypes.Selection:
{
// ReSharper disable PossibleNullReferenceException
var selectedByUserIssueIndex = Answers.IndexOf(Answers.First(a => a.SelectedByUser)) + 1;
var correctIssueIndex = CurrentIssue.Answers.IndexOf(CurrentIssue.Answers.First(a => a.IsCorrect)) + 1;
// ReSharper restore PossibleNullReferenceException
AppController.UserInfo.Answers[_currentSet].Add(new UserAnswer
{
IsCorrect = (isCorrect = selectedByUserIssueIndex == correctIssueIndex),
Answer = selectedByUserIssueIndex.ToString("0"),
CorrectAnswer = correctIssueIndex.ToString("0"),
Points = CurrentIssue.CorrectAnswerPoints
});
}
break;
case IssueTypes.SelectionInImage:
AppController.UserInfo.Answers[_currentSet].Add(new UserAnswer
{
IsCorrect = (isCorrect = UserAnswer == CorrectAnswer),
Answer = UserAnswer.ToString("0"),
CorrectAnswer = CorrectAnswer.ToString("0"),
Points = CurrentIssue.CorrectAnswerPoints
});
break;
case IssueTypes.ImageSelection:
{
// ReSharper disable AssignNullToNotNullAttribute
var userSelection = Answers.Where(a => a.SelectedByUser).Select(a => a.OriginalImageFileName).ToList();
var correctSelection = CurrentIssue.Answers.Where(a => a.Selected).Select(a => a.ImageFileName).ToList();
// ReSharper restore AssignNullToNotNullAttribute
AppController.UserInfo.Answers[_currentSet].Add(new UserAnswer
{
IsCorrect =
(isCorrect =
userSelection.Count == correctSelection.Count &&
userSelection.All(correctSelection.Contains)),
Answer = string.Empty,
CorrectAnswer = string.Empty,
Points = CurrentIssue.CorrectAnswerPoints
});
}
break;
case IssueTypes.Order:
AppController.UserInfo.Answers[_currentSet].Add(new UserAnswer
{
// ReSharper disable AssignNullToNotNullAttribute
IsCorrect = (isCorrect = !Answers.Where((answer, index) => answer.OrderNo != index).Any()),
// ReSharper restore AssignNullToNotNullAttribute
Answer = string.Empty,
CorrectAnswer = string.Empty,
Points = CurrentIssue.CorrectAnswerPoints
});
break;
case IssueTypes.Placement:
isCorrect = PlacementCorrectAnswer1.Count == CurrentIssue.PlacementCorrectAnswer1.Count &&
!PlacementCorrectAnswer1.Where(
(imageFileName, index) =>
imageFileName !=
Path.Combine(_currentDirectory, CurrentIssue.PlacementCorrectAnswer1[index])).Any();
isCorrect &= PlacementCorrectAnswer2.Count == CurrentIssue.PlacementCorrectAnswer2.Count &&
!PlacementCorrectAnswer2.Where(
(imageFileName, index) =>
imageFileName !=
Path.Combine(_currentDirectory, CurrentIssue.PlacementCorrectAnswer2[index])).Any();
isCorrect &= NumberOfShelves < 3 ||
(PlacementCorrectAnswer3.Count == CurrentIssue.PlacementCorrectAnswer3.Count &&
!PlacementCorrectAnswer3.Where(
(imageFileName, index) =>
imageFileName !=
Path.Combine(_currentDirectory, CurrentIssue.PlacementCorrectAnswer3[index])).Any());
isCorrect &= NumberOfShelves < 4 ||
(PlacementCorrectAnswer4.Count == CurrentIssue.PlacementCorrectAnswer4.Count &&
!PlacementCorrectAnswer4.Where(
(imageFileName, index) =>
imageFileName !=
Path.Combine(_currentDirectory, CurrentIssue.PlacementCorrectAnswer4[index])).Any());
isCorrect &= NumberOfShelves < 5 ||
(PlacementCorrectAnswer5.Count == CurrentIssue.PlacementCorrectAnswer5.Count &&
!PlacementCorrectAnswer4.Where(
(imageFileName, index) =>
imageFileName !=
Path.Combine(_currentDirectory, CurrentIssue.PlacementCorrectAnswer5[index])).Any());
AppController.UserInfo.Answers[_currentSet].Add(new UserAnswer
{
IsCorrect = isCorrect,
Answer = string.Empty,
CorrectAnswer = string.Empty,
Points = CurrentIssue.CorrectAnswerPoints
});
break;
}
if (isCorrect)
{
AppController.UserInfo.CorrectAnswers[_currentSet]++;
AppController.UserInfo.CorrectAnswerPoints[_currentSet] += CurrentIssue.CorrectAnswerPoints;
}
else
{
AppController.UserInfo.IncorrectAnswers[_currentSet]++;
}
// Go to the either next issue or result page
var issue = GetNextIssue();
if (issue == null)
{
var page = o as Page;
if (page != null && page.NavigationService != null)
{
page.NavigationService.Navigate(AppController.GetPage(ApplicationPages.ResultPage));
}
}
else
{
SetNewIssue(issue);
}
}