public async Task <Result <Unit> > Handle(Command request, CancellationToken cancellationToken)
{
var user = await _context.Users
.FirstOrDefaultAsync(x =>
x.UserName == _userAccessor.GetUsername());
var atendee = new ActivityAtendee
{
AppUser = user,
Activity = request.Activity,
IsHost = true
};
request.Activity.Atendees.Add(atendee);
_context.Activities.Add(request.Activity);
var result = await _context.SaveChangesAsync() > 0;
if (!result)
{
return(Result <Unit> .Failure("Failed to create activity"));
}
return(Result <Unit> .Success(Unit.Value));
}
public async Task <Result <Unit> > Handle(Command request, CancellationToken cancellationToken)
{
var activity = await _context.Activities
.Include(a => a.Atendees).ThenInclude(u => u.AppUser)
.SingleOrDefaultAsync(x => x.Id == request.Id);
if (activity == null)
{
return(null);
}
var user = await _context.Users.FirstOrDefaultAsync(x =>
x.UserName == _userAccessor.GetUsername());
if (user == null)
{
return(null);
}
var hostUsername = activity.Atendees.FirstOrDefault(x => x.IsHost)?.AppUser?.UserName;
var attendance = activity.Atendees.FirstOrDefault(x => x.AppUser.UserName == user.UserName);
if (attendance != null && hostUsername == user.UserName)
{
activity.IsCanceled = !activity.IsCanceled;
}
if (attendance != null && hostUsername != user.UserName)
{
activity.Atendees.Remove(attendance);
}
if (attendance == null)
{
attendance = new ActivityAtendee
{
AppUser = user,
Activity = activity,
IsHost = false
};
activity.Atendees.Add(attendance);
}
var result = await _context.SaveChangesAsync() > 0;
return(result ? Result <Unit> .Success(Unit.Value) : Result <Unit> .Failure("Problem updating attendance"));
}