public async Task <IActionResult> AddDragAndDropQuestion([FromBody] AddDragAndDropQuestionViewModel model)
{
var user = await _userManager.GetUserAsync(HttpContext.User);
var test = await _context.Tests.SingleOrDefaultAsync(t => t.Id == (int)RouteData.Values["testId"]);
if (test == null)
{
return(NotFound());
}
if (test.CreatedBy != user)
{
return(Forbid());
}
model.TestId = test.Id;
TryValidateModel(model);
if (ModelState.IsValid)
{
// транзакция
using (var ts = _context.Database.BeginTransaction())
{
var question = new DragAndDropQuestion
{
Title = model.Title,
QuestionType = Enum.GetName(typeof(Question.QuestionTypeEnum), 4),
Test = test,
Score = model.Score
};
//создать в базе вопрос
var questionCreated = (await _context.Questions.AddAsync(question)).Entity;
await _context.SaveChangesAsync(); //применить изменения
foreach (var option in model.Options)
{
// добавить в базу Options
var optionCreated = (await _context.Options.AddAsync(
new Option {
Order = option.Order, Text = option.Text, Question = questionCreated
})).Entity;
}
// обновить вопрос и применить изменения
_context.Questions.Update(questionCreated);
await _context.SaveChangesAsync();
ts.Commit();
}
var redirectUrl = Url.Action("Details", "Test", new { id = test.Id });
return(new JsonResult(redirectUrl));
}
var errors = new List <ModelError>();
foreach (var modelState in ViewData.ModelState.Values)
{
foreach (var error in modelState.Errors)
{
errors.Add(error);
}
}
Response.StatusCode = StatusCodes.Status400BadRequest;
return(new JsonResult(errors));
}
private static void ParseQuestion(Queue <Token> tokens, Test test, TestData testData)
{
Question question;
int i = 1, checkedCount = 0, Row = 0;
bool textParsed = false, scoreParsed = false, optionParsed = false, codeParsed = false;
Row = tokens.Peek().Row;
Consume(tokens, "question");
Consume(tokens, "{");
var type = ParseType(tokens);
switch (type)
{
case (int)Question.QuestionTypeEnum.SingleChoiceQuestion:
question = new SingleChoiceQuestion();
break;
case (int)Question.QuestionTypeEnum.MultiChoiceQuestion:
question = new MultiChoiceQuestion();
break;
case (int)Question.QuestionTypeEnum.TextQuestion:
question = new TextQuestion();
break;
case (int)Question.QuestionTypeEnum.DragAndDropQuestion:
question = new DragAndDropQuestion();
break;
case (int)Question.QuestionTypeEnum.CodeQuestion:
question = new CodeQuestion();
break;
default:
question = new SingleChoiceQuestion();
break;
}
question.Test = test;
while (tokens.Peek().Value != "}")
{
switch (tokens.Peek().Value)
{
case "text":
if (!textParsed)
{
question.Title = ParseString(tokens, "text");
}
else
{
throw new Exception(string.Format("Text already parsed (Quesiton (Row - {0})).", Row));
}
textParsed = true;
break;
case "score":
if (!scoreParsed)
{
question.Score = ParseInt(tokens, "score");
}
else
{
throw new Exception(string.Format("Score already parsed (Quesiton (Row - {0})).", Row));
}
scoreParsed = true;
break;
case "option":
if (question is TextQuestion)
{
if (i == 1)
{
ParseOption(tokens, question, testData, i++, ref checkedCount);
}
else
{
throw new Exception(string.Format(
"TextQuestion поддерживает только один ответ (Quesiton (Row - {0})).", Row));
}
}
else
{
ParseOption(tokens, question, testData, i++, ref checkedCount);
}
optionParsed = true;
break;
case "code":
if (question is CodeQuestion)
{
if (!codeParsed)
{
ParseCode(tokens, question, testData);
}
else
{
throw new Exception(string.Format(
"CodeQuestion поддерживает только один ответ (Quesiton (Row - {0})).", Row));
}
}
else
{
throw new Exception(
string.Format("Данный тип вопроса не поддерживает code(Quesiton (Row - {0})).",
Row));
}
codeParsed = true;
break;
default:
throw new Exception(string.Format("Неизвестный параметр: {0} (Row - {1}).",
tokens.Peek().Value, tokens.Peek().Row));
}
}
question.QuestionType = Enum.GetName(typeof(Question.QuestionTypeEnum), type);
if (question is SingleChoiceQuestion && checkedCount != 1)
{
throw new Exception(string.Format(
"В данном типе вопроса нужно отметить верный один ответ (Quesiton (Row - {0})).", Row));
}
if (question is MultiChoiceQuestion && checkedCount < 1)
{
throw new Exception(string.Format(
"В данном типе вопроса нужно отметить хотя бы один верный ответ (Quesiton (Row - {0})).", Row));
}
Consume(tokens, "}");
if (!scoreParsed)
{
question.Score = 1;
}
if (!(question is CodeQuestion))
{
if (!textParsed || !optionParsed)
{
throw new Exception(string.Format(
"Заданы не все требуемые поля (Quesiton (Row - {0})). Text - {1}, Option - {2}.",
Row, textParsed, optionParsed));
}
}
else if (!textParsed || !codeParsed)
{
throw new Exception(string.Format(
"Заданы не все требуемые поля (Quesiton (Row - {0})). Text - {1}, Code - {2}.",
Row, textParsed, codeParsed));
}
testData.Questions.Add(question);
}
