public Question GetPreviousRankQuestionBefore(Guid currentQuestionId)
{
var currenQuestion = GetQuestion(currentQuestionId);
var currentRank = currenQuestion.Rank;
var currentId = currenQuestion.Id;
return(QuestionStore
.OrderByDescending(x => x.Rank)
.FirstOrDefault(x => x.Rank <= currentRank &&
x.Id != currentId));
}
public Question GetNextRankQuestionAfter(Guid currentQuestionId)
{
var currenQuestion = GetQuestion(currentQuestionId);
var currentRank = currenQuestion.Rank;
var currentId = currenQuestion.Id;
return(QuestionStore
.OrderBy(x => x.Rank)
.FirstOrDefault(x => x.Rank >= currentRank &&
x.Id != currentId));
}
public void TestExpression(Dictionary <string, object> context, string expression, object expectedResult)
{
var questions = new List <Questionnaires.RunTime.Question>();
foreach (var value in context)
{
questions.Add(ValueCreator.CreateQuestion(value.Key, (dynamic)value.Value));
}
var store = new QuestionStore(questions);
var astFactory = new ASTBuilder(new Result());
var AST = astFactory.BuildExpression(expression);
var evaluator = new Questionnaires.RunTime.ExpressionEvaluator(store);
var result = evaluator.Evaluate((IExpression)AST);
Value.ValueTester.Test((dynamic)result, expectedResult);
}
public Question GetFirstQuestion()
{
return(QuestionStore.OrderBy(x => x.Rank).FirstOrDefault());
}
public Question GetQuestion(Guid value)
{
return(QuestionStore.FirstOrDefault(x => x.Id == value));
}
public bool HasQuestions()
{
return(null != QuestionStore && QuestionStore.Any());
}
