public async Task <IActionResult> EditElection([FromBody] TemporaryElection election)
{
//this method is called using ajax calls
//so if a business rule is not met we'll throw a businessException and catch it to create and internal server error and return its msg
//as json
try
{
if (ModelState.IsValid)
{
_electionBusiness.EditElection(election);
return(Json(new { success = true }));
}
else
{
//Model is not valid
//so there is a business rule not met, lets throw a businessException and catch it
throw new BusinessException(_messagesLoclizer["Data not valid, please check again."]);
}
}
catch (DataNotUpdatedException bnu)
{
//lets now create a suitable message for the user and store it inside a ViewBag (which is a Dynamic Object we can fill it
//by whatever we want
BusinessMessage bm = new BusinessMessage("Error", bnu.Message);
ViewBag.BusinessMessage = bm;
return(View());
}
catch (BusinessException be)
{
//lets create an internal server error so that the response returned is an ERROR, and jQuery ajax will understand that.
HttpContext.Response.StatusCode = 500;
return(Json(new { Message = be.Message }));
}
catch (Exception E)
{
HttpContext.Response.StatusCode = 500;
return(Json(new { Message = E.Message }));
//In above code I created an internal server error so that the response returned is an ERROR, and jQuery ajax will understand that.
}
}
public void EditElection(TemporaryElection election)
{
try
{
//first of all lets check if this election is in future, if it is not then we'll not edit it
if (DateTime.Parse(election.StartDate) <= DateTime.Now)
{
//so it is not a future election
//so there is a business rule not met, lets throw a businessException and catch it
throw new BusinessException(_messagesLocalizer["A New Election should take place in a future date."]);
}
if (GetElectionsInSamePeriod(DateTime.Parse(election.StartDate), int.Parse(election.DurationInDays)) > 1)
{
//so in addtion to the election instance to edit, there are other elections in the db from the same period
//so there is a business rule not met, lets throw a businessException and catch it
throw new BusinessException(_messagesLocalizer["There is an existing Election during the same period."]);
}
if (int.Parse(election.DurationInDays) < 0 || int.Parse(election.DurationInDays) > 5)
{
//so the number of days is invalid
//so there is a business rule not met, lets throw a businessException and catch it
throw new BusinessException(_messagesLocalizer["The duration of the Election should be from one to five days."]);
}
//this variable is going to be used when checking if user updated hasNeutral opinion
bool oldHasNeutral = GetById(Guid.Parse(election.Id)).HasNeutral;
Election myElection = new Election
{
Id = Guid.Parse(election.Id),
Name = election.Name,
StartDate = DateTime.Parse(election.StartDate),
DurationInDays = int.Parse(election.DurationInDays),
HasNeutral = bool.Parse(election.HasNeutral)
};
int updatedRows = Edit(myElection.Id, myElection);
if (updatedRows < 1)
{
//row not updated in the DB
throw new DataNotUpdatedException(_messagesLocalizer["Data not updated, operation failed."]);
}
//if hasNeutral field was updated then we should add/delete neutralCandidate from the db
if (myElection.HasNeutral == oldHasNeutral)
{
//user didn't update hasNeutral property, lets proceed editing the Election instance
//so do nothing
}
else
{
//user did updated hasNeutral property
if (myElection.HasNeutral)
{
//lets add a neutral candidate to the db related to this instance of Election
Candidate neutralOpinion = new Candidate
{
Id = Guid.NewGuid(),
isNeutralOpinion = true,
Election = GetById(myElection.Id)
};
int updatedCandidateRows = _candidateRepository.Add(neutralOpinion);
if (updatedCandidateRows < 1)
{
//row not updated in the DB
throw new DataNotUpdatedException(_messagesLocalizer["Data not updated, operation failed."]);
}
}
else
{
//lets remove a neutral candidate instance from db which is related to this instance of Election
Expression <Func <Candidate, bool> > expr = e => e.Election.Id == myElection.Id && e.isNeutralOpinion == true;
Candidate myNeutralCandidate = _candidateRepository.GetOneFiltered(expr);
int updatedRows4 = _candidateRepository.Delete(myNeutralCandidate.Id);
if (updatedRows4 < 1)
{
//row not updated in the DB
throw new DataNotUpdatedException(_messagesLocalizer["Data not updated, operation failed."]);
}
}
}
}
catch (DataNotUpdatedException E)
{
throw E;
}
catch (BusinessException E)
{
throw E;
}
catch (Exception E)
{
throw E;
}
}
