public CommandInfo(MethodInfo method)
{
_method = method;
_parameters = method.GetParameters();
_parameterDict = _parameters.ToDictionary(p => p.Name);
_requiredParams = _parameters.Count(p => !p.IsOptional);
_moduleFactory = DependencyUtility.CreateFactory(method.DeclaringType);
if (method.ReturnType != typeof(Task) &&
method.ReturnType.GetGenericTypeDefinition() != typeof(Task <>))
{
throw new ArgumentException($"{method} is not asynchronous.");
}
// build name regex
_attribute = method.GetCustomAttribute <CommandAttribute>();
if (_attribute == null)
{
throw new ArgumentException($"{method} is not a command.");
}
_nameRegex = new Regex(BuildNamePattern(method, _attribute), _options);
// build parameter regex
var bindingExpression = method.GetCustomAttribute <BindingAttribute>()?.Expression;
var requiredParameters = _parameterDict.Where(x => !x.Value.IsOptional).Select(x => x.Key);
if (bindingExpression == null && _parameters.Any(p => !p.IsOptional))
{
bindingExpression = $"[{string.Join("] [", requiredParameters)}]";
}
_parameterRegex = new Regex(BuildParameterPattern(bindingExpression ?? ""), _options);
// build optional parameter regex
_optionRegex = new Regex(BuildOptionPattern(_parameters.Where(p => p.IsOptional).ToArray()), _options);
}