public void HandleCommand(CreateProjectCommand command)
{
if (string.IsNullOrEmpty(command.ProjectName))
{
throw new Exception("Project is now alloed to have empty name");
}
if (command.UserId == Guid.Empty)
{
throw new Exception("User is not allowed to have empty Key");
}
var userKey = new SimpleKey(command.UserId.ToString());
var userBeforeUpdate = _snapshotStore.Load <User>(userKey);
var user = _snapshotStore.Load <User>(userKey);
if (user.ProjectCount >= 5)
{
throw new Exception("User is not allowed to have more than 5 projects");
}
var projectKey = new SimpleKey(command.ProjectId.ToString());
try {
var project = _snapshotStore.Create(projectKey, new Project(command.ProjectName, command.UserId));
user.AddProject();
}
catch (Exception) {
_snapshotStore.Update(userKey, userBeforeUpdate);
_snapshotStore.Delete <Project>(projectKey);
throw new Exception($"Failed to apply {nameof(CreateProjectCommand)}");
}
}