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 async Task<bool> CanVote(Present present, BirthdayPresentEvent birthdayPresentEvent, User userVoted)
{
if (!this.VotingDataIsValid(present,birthdayPresentEvent, userVoted))
{
return false;
}
if(!birthdayPresentEvent.IsActive)
{
return false;
}
if (birthdayPresentEvent.BirthdayGuy.UserName == userVoted.UserName)
{
return false;
}
if(await this.UserAlreadyVoted(birthdayPresentEvent, userVoted))
{
return false;
}
return true;
}
private bool CanCancelEvent(BirthdayPresentEvent eventForCancelation, BirthdayPresentEventCancelationDataTransferModel model)
{
return eventForCancelation != null && eventForCancelation.Creator.UserName.Equals(model.RequestUsername);
}
private async Task<bool> UserAlreadyVoted(BirthdayPresentEvent birthdayPresentEvent, User userVoted)
{
var userAlreadyVoted = await this.votes.All()
.AnyAsync(
x =>
x.BirthdayPresentEventId == birthdayPresentEvent.Id &&
x.UserVotedId.Equals(userVoted.Id));
if (userAlreadyVoted)
{
return true;
}
return false;
}
private bool VotingDataIsValid(Present present, BirthdayPresentEvent birthdayPresentEvent, User userVoted)
{
if (present == null || birthdayPresentEvent == null || userVoted == null)
{
return false;
}
return true;
}