public double GetQuestionScore(QuestionScore question)
{
var variables = this.GetQuestionVariables(question);
var expression = new Expression(question.ScoreFormula, variables);
return(expression.calculate());
}
public void AddQuestionPoints(QuestionScore questionScore)
{
questionScore.Question.Score = questionScore.Points * questionScore.Question.Weight;
questionScore.Question.MaxScore = questionScore.MaxPoints * questionScore.Question.Weight;
AnsweredQuestions.Add(questionScore.Question);
TotalScore += questionScore.Question.Score;
TotalMaxScore += questionScore.Question.MaxScore;
}
public static QuestionScore SetCorrectOptions(this QuestionScore question)
{
foreach (var option in question.OptionList)
{
if (option.Weight > 0)
{
option.IsAnswer = true;
}
}
return(question);
}
public static QuestionScore SetUserSelectedOptions(this QuestionScore question)
{
question.OptionList.Join(
question.Answers,
option => option.IdOption,
userAnswer => userAnswer,
(option, userAnswer) =>
{
option.UserSelected = true;
return(true);
}).ToArray();
return(question);
}
private PrimitiveElement[] GetQuestionVariables(QuestionScore question)
{
var variables = new List <PrimitiveElement>();
var correctUserOptions = this.GetCorrectUserOptions(question);
var correctQuestionOptions = this.GetCorrectQuestionOptions(question);
var answersIterator = new OptionListIterator(correctUserOptions, VariableNames.CorrectAnswer);
variables.Add(new Argument(VariableNames.CorrectOptions, correctQuestionOptions.Count));
variables.Add(new Argument(VariableNames.CorrectAnswers, correctUserOptions.Count));
variables.Add(new Argument(VariableNames.CorrectAnswersLength, correctUserOptions.Count - 1));
variables.Add(new Argument(VariableNames.QuestionScore, question.Weight));
variables.Add(new Argument(VariableNames.OptionsLength, question.OptionList.Count - 1));
variables.Add(new Function(VariableNames.CorrectAnswer, answersIterator));
return(variables.ToArray());
}
public List <OptionScore> GetCorrectUserOptions(QuestionScore question)
{
List <OptionScore> userSelectedOptions = question.OptionList.Join(
question.Answers,
option => option.IdOption,
answer => answer,
(option, answer) =>
{
return(option);
})
.Where(option => option.Weight > 0)
.ToList();
return(userSelectedOptions);
}
public void Init()
{
instance = new QuestionScore();
}
public List <OptionScore> GetCorrectQuestionOptions(QuestionScore question)
{
return(question.OptionList.Where(option => option.IsAnswer).ToList());
}
