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