args.rs
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args.rs
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	pub trait Validatable {
	fn from_id(id: usize) -> Self;
	fn from_string(s: String) -> Self;
	fn get_string(&self) -> Option<&str>;
	}

	#[derive(Clone)]
	pub enum Args {
	Id(usize),
	Script(String),
	}

	#[derive(Clone)]
	pub enum Item {
	Id(usize),
	Name(String),
	}

	impl Validatable for Args {
	fn from_id(id: usize) -> Self { Args::Id(id) }
	fn from_string(s: String) -> Self { Args::Script(s) }

	fn get_string(&self) -> Option<&str> {
	match self {
	Args::Id(_) => None,
	Args::Script(s) => Some(s),
	}
	}
	}

	impl Validatable for Item {
	fn from_id(id: usize) -> Self { Item::Id(id) }
	fn from_string(s: String) -> Self { Item::Name(s) }

	fn get_string(&self) -> Option<&str> {
	match self {
	Item::Id(_) => None,
	Item::Name(s) => Some(s),
	}
	}
	}

	pub fn validate<T: Validatable>(s: &str) -> Result<T, String> {
	if let Ok(id) = s.parse::<usize>() {
	Ok(T::from_id(id))
	} else {
	Ok(T::from_string(s.to_owned()))
	}
	}