public async Task <bool> Handle(RegisterEnvironmentRequest message, IOutboundPort <NewEntityResponse <Guid> > outputPort)
{
var response = new NewEntityResponse <Guid>();
var user = await _userStore.GetUserById(message.Owner);
if (user != null)
{
await _userStore.LoadEnvironments(user);
}
switch (message.CreateMode)
{
case RegisterEnvironmentRequest.Mode.Touch:
// Check if user already has it:
var env = user?.Environments?.FirstOrDefault(e => e.Id == message.MfgId);
// check if we have this environment already - and that its associated to user
// if not, we'll fall through to Create logic where we'll attempt creating it - erroring if already
// present.
if (env != null)
{
// This next line should be impossible - its just here to keep linting happy.
if (env.Id == null)
{
throw new Exception("Malformed input on this entity");
}
// we already have it and its associated to user.
// should be same as message.MfgId
response.Id = env.Id.Value;
break;
}
else if (user == null)
{
return(false); // nothing to do, this is a mis-use.
}
else
{
// Apparently we gotta explicitly mimic fallthrough...
goto case RegisterEnvironmentRequest.Mode.Create;
}
case RegisterEnvironmentRequest.Mode.Create:
// Environments need an initial user:
if (user == null)
{
return(false);
}
// check if it exists (blind firing a create call
// may be a pretty hard crash.)
var searchResult = await _envStore.GetById(message.MfgId);
if (searchResult != null)
{
return(false);
}
// Compose a new entry entity
var envEntity = _entityFactory.GetEnvironmentBuilder()
.SetId(message.MfgId)
.SetDescription(message.Description)
.SetModelInfo(message.Model)
.Build();
response.Id = await _envStore.Create(envEntity);
// Associate to user:
await _userStore.AddAssociationToEnv(user, envEntity);
break;
default:
throw new ArgumentOutOfRangeException(nameof(message));
}
outputPort.Handle(response);
return(true);
}