public async Task <IActionResult> GetCandidatesList_byElectionId([FromBody] string electionId)
{
//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 (String.IsNullOrEmpty(electionId))
{
throw new BusinessException(_messagesLoclizer["electionId cannot be null."]);
}
Election e = _electionBusiness.GetById(Guid.Parse(electionId));
if (e == null)
{
throw new BusinessException(_messagesLoclizer["Election is not found."]);
}
//lets serialize the list of candidates of the election we've got and send it back as a reponse
//note that I didn't retrieve candidates as they are, I selected only needed attributes bcuz when i tried serializing
//candidates objects as they are I got this error "self referencing loop detected with type" it means json tried to serialize the candidate object
//but it found that each candidate has an Election object, and this election object has a list of candidates and so on, so i excluded election
//from the selection to avoid the infinite loop
var candidates = _candidateBusiness.GetCandidate_byElection(e);
if (candidates == null)
{
throw new BusinessException(_messagesLoclizer["Candidates List not found."]);
}
var json = JsonConvert.SerializeObject(_candidateBusiness.ConvertCandidateList_ToCandidateViewModelList(candidates));
return(Ok(json));
}
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)
{
//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 = E.Message }));
}
}
public async Task <IActionResult> GetResultsOfElection([FromBody] Guid electionId)
{
//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
_logger.LogInformation("Method Home/GetResultsOfElection() is called");
try
{
if (electionId == null || electionId == Guid.Empty)
{
throw new BusinessException(_messagesLoclizer["electionId can not be null."]);
}
//this method returns a list of candidates (of an election) ordered by their number of votes
var election = _electionBusiness.GetById(electionId);
if (election == null)
{
throw new BusinessException(_messagesLoclizer["Election is not found."]);
}
_logger.LogInformation("Calling method CandidateBusiness.GetCandidate_byElection()");
var candidates = _candidateBusiness.GetCandidate_byElection(election);
_logger.LogInformation("Calling _candidateBusiness.ConvertCandidateList_ToCandidateViewModelList() method");
List <CandidateViewModel> candidatesViewModel = _candidateBusiness.ConvertCandidateList_ToCandidateViewModelList(candidates);
//lets serialize the list of candidatesviewmodel as json object
JsonSerializerSettings settings = new JsonSerializerSettings {
DateFormatString = CultureInfo.CurrentCulture.DateTimeFormat.ShortDatePattern
};
var json = JsonConvert.SerializeObject(candidatesViewModel.OrderByDescending(c => c.VotesCount), settings);
return(Ok(json));
}
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)
{
//lets create an internal server error so that jquery ajax understand that there was an error
HttpContext.Response.StatusCode = 500;
//leets log the exception msg to the console window
_logger.LogError("Exception, " + E.Message);
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.
}
}