public ActionResult AddProblem(ProblemDetailModel model)
{
// 检查参数。
if (string.IsNullOrEmpty(Request.QueryString["id"]))
{
return(Redirect("~/Contest"));
}
int contestId;
if (!int.TryParse(Request.QueryString["id"], out contestId))
{
return(Redirect("~/Contest"));
}
if (!ContestManager.Default.IsContestExist(contestId))
{
return(Redirect("~/Contest"));
}
// 验证数据模型。
if (!TryValidateModel(model))
{
ViewBag.TitleErrorMessage = ModelStateHelper.GetFirstError(ModelState, "Title");
return(View(model));
}
ContestHandle contestHandle = new ContestHandle(contestId);
using (ContestDataProvider contestData = ContestDataProvider.Create(contestHandle, false))
{
// 验证用户操作权限。
if (!UserSession.IsAuthorized(Session) ||
string.Compare(contestData.Creator, UserSession.GetUsername(Session), false) != 0)
{
return(Redirect("~/Error/AccessDenied"));
}
// 在题目库中创建题目。
ProblemHandle problemHandle = ProblemArchieveManager.Default.CreateProblem(
contestData.PeekNextProblemId());
model.ResetNullStrings();
model.SaveTo(problemHandle); // 为避免死锁，该句不应放置在下面的 using 块中。
using (ProblemDataProvider problemData = ProblemDataProvider.Create(problemHandle, false))
{
problemData.ContestId = contestId;
problemData.AuthorizationGroup = UserGroup.Guests;
}
// 将创建的题目添加至当前比赛中。
contestData.AddProblem(problemHandle);
}
return(Redirect($"~/Contest/Show?id={contestId}"));
}
private bool ValidateContestDetailModel(ContestDetailModel model)
{
if (model == null)
{
throw new ArgumentNullException(nameof(model));
}
bool validationPassed = TryValidateModel(model);
if (!validationPassed)
{
ViewBag.TitleErrorMessage = ModelStateHelper.GetFirstError(ModelState, "Title");
ViewBag.CreatorErrorMessage = ModelStateHelper.GetFirstError(ModelState, "Creator");
ViewBag.UsergroupNameErrorMessage = ModelStateHelper.GetFirstError(ModelState, "UsergroupName");
ViewBag.StartTimeStringErrorMessage = ModelStateHelper.GetFirstError(ModelState, "StartTimeString");
ViewBag.EndTimeStringErrorMessage = ModelStateHelper.GetFirstError(ModelState, "EndTimeString");
ViewBag.ParticipationModeNameErrorMessage = ModelStateHelper.GetFirstError(ModelState, "ParticipationModeName");
ViewBag.AuthorizationModeNameErrorMessage = ModelStateHelper.GetFirstError(ModelState, "AuthorizationModeName");
}
if (string.Compare(model.AuthorizationModeName, "Protected", true) == 0 &&
(string.IsNullOrEmpty(model.Password) || model.Password.Length < 6))
{
validationPassed = false;
ViewBag.PasswordErrorMessage = "Password should be at least 6 characters long.";
}
DateTime startTime = DateTime.Parse(model.StartTimeString);
DateTime endTime = DateTime.Parse(model.EndTimeString);
if (endTime <= startTime)
{
validationPassed = false;
ViewBag.EndTimeStringErrorMessage = "End time must be later than start time.";
}
return(validationPassed);
}