public async Task<int> CreateEvent(BirthdayPresentEventCreationDataTransferModel model)
{
if (this.CanCreateEvent(model))
{
var creator = await this.users.All().SingleOrDefaultAsync(x => x.UserName.Equals(model.CreatorUsername));
var birthdayGuy = await this.users.All().SingleOrDefaultAsync(x => x.UserName.Equals(model.BirthdayGuyUsername));
var birthdayDate = DateTime.Parse(model.BirthdayDate);
if (creator == null || birthdayGuy == null || birthdayDate == null)
{
return ServicesConstants.DbModelCreationFailed;
}
var birthdayPresentEvent = new BirthdayPresentEvent()
{
Creator = creator,
BirthdayGuy = birthdayGuy,
BirthdayDate = birthdayDate,
IsActive = true
};
this.birthdayPresentEvents.Add(birthdayPresentEvent);
await this.birthdayPresentEvents.SaveChangesAsync();
int id = birthdayPresentEvent.Id;
return id != 0 ? id : ServicesConstants.DbModelInsertionFailed;
}
else
{
return ServicesConstants.DbModelCreationFailed;
}
}
private bool CanCreateEvent(BirthdayPresentEventCreationDataTransferModel model)
{
// User cannot create event for his own benefits
if (model.CreatorUsername.Equals(model.BirthdayGuyUsername))
{
return false;
}
// Check if there is an event that is already active for the targeted person
var isActive = this.birthdayPresentEvents.All().Any(x => x.BirthdayGuy.UserName.Equals(model.BirthdayGuyUsername) && x.IsActive);
if (isActive)
{
return false;
}
// Check if there was an event from the same type created this year
var isDoneThisYear = this.birthdayPresentEvents.All()
.Any(
x =>
x.BirthdayGuy.UserName.Equals(model.BirthdayGuyUsername) &&
x.BirthdayDate.Year.Equals(DateTime.Now.Year));
if (isDoneThisYear)
{
return false;
}
// If none of the above is true, then an event may be created.
return true;
}