public UsageGraph(Type commandType)
{
_commandType = commandType;
_inputType = commandType.FindInterfaceThatCloses(typeof(IOaktonCommand <>)).GetTypeInfo().GetGenericArguments().First();
_commandName = CommandFactory.CommandNameFor(commandType);
_commandType.ForAttribute <DescriptionAttribute>(att => { _description = att.Description; });
if (_description == null)
{
_description = _commandType.Name;
}
_handlers = InputParser.GetHandlers(_inputType);
_validUsages = new Lazy <IEnumerable <CommandUsage> >(() => {
if (_usages.Any())
{
return(_usages);
}
var usage = new CommandUsage()
{
Description = _description,
Arguments = _handlers.OfType <Argument>(),
ValidFlags = _handlers.Where(x => !(x is Argument))
};
return(new CommandUsage[] { usage });
});
}