public ServiceResult <TopicServiceResultCode> AddTopic(AddOrUpdateTopicRequest request)
{
var isValidRequest = ValidateAddTopicRequest(request);
if (!isValidRequest)
{
return(ArgumentErrorResult(TopicServiceResultCode.ArgumentError));
}
var topic = new Topic {
Id = Guid.NewGuid(), CourseId = request.CourseId, Title = request.Title, DisplayOrder = request.DisplayOrder
};
try
{
_topicRepo.Add(topic);
_topicRepo.SaveChanges();
return(BuildResult(true, TopicServiceResultCode.Success, resultObj: topic));
}
catch (Exception ex)
{
_systemErrorsRepo.AddLog(ex);
return(InternalErrorResult(TopicServiceResultCode.BackendException));
}
}
private bool ValidateUpdateTopicRequest(AddOrUpdateTopicRequest request)
{
var isValidData = ValidateAddTopicRequest(request);
var isValidKey = !(request.Id == Guid.Empty);
return(isValidData && isValidKey);
}
public ServiceResult <TopicServiceResultCode> UpdateTopic(AddOrUpdateTopicRequest request)
{
var isValidRequest = ValidateUpdateTopicRequest(request);
if (!isValidRequest)
{
return(ArgumentErrorResult(TopicServiceResultCode.ArgumentError));
}
try
{
var targetTopic = _topicRepo.Get(request.Id);
if (targetTopic == null)
{
return(DataErrorResult(TopicServiceResultCode.DataNotExist));
}
UpdateDataOfTopic(targetTopic, request);
_topicRepo.Update(targetTopic);
_topicRepo.SaveChanges();
return(BuildResult(true, TopicServiceResultCode.Success, resultObj: targetTopic));
}
catch (Exception ex)
{
_systemErrorsRepo.AddLog(ex);
return(InternalErrorResult(TopicServiceResultCode.BackendException));
}
}
private bool ValidateAddTopicRequest(AddOrUpdateTopicRequest request)
{
if (request == null)
{
return(false);
}
if (request.CourseId == Guid.Empty)
{
return(false);
}
if (string.IsNullOrWhiteSpace(request.Title))
{
return(false);
}
if (request.DisplayOrder <= 0)
{
return(false);
}
return(true);
}
private void UpdateDataOfTopic(Topic topic, AddOrUpdateTopicRequest request)
{
topic.Title = request.Title;
topic.DisplayOrder = request.DisplayOrder;
}