nyandere 0.1.0

i help with keeping track of purchases. meow
Documentation 
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//! Structurally interact with, modify and do things.

pub mod balance;
pub mod create;
pub mod deliver;
pub mod pay;

pub use balance::Balance;
pub use create::Create;
pub use deliver::Deliver;
pub use pay::Pay;

use crate::{
    aux::Owned,
    ext::{Gtin, Money},
};

use super::{Runtime, model};

// TODO: do this via dynamic dispatch so the cases don't have to be matched manually?

impl Runtime {
    /// Performs one single command.
    ///
    /// This can never fail, any [`Command`]
    /// ***that is constructed from this instance***
    /// is valid to run at any point after construction!
    pub fn fulfil(&mut self, cmd: Command) {
        use Command as C;
        match cmd {
            C::Create(cmd) => self.create(cmd),
            C::Pay(cmd) => self.pay(cmd),
            C::Deliver(cmd) => self.deliver(cmd),
            C::Balance(cmd) => println!("{}", self.balance(cmd)),
        }
    }
}

/// Do something that makes, modifies or reads.
#[derive(Owned!)]
pub enum Command {
    Create(Create),
    Pay(Pay),
    Deliver(Deliver),
    Balance(Balance),
}

/// A [`model::Entity`] except that it might not exist yet.
#[derive(Owned!)]
pub struct Entity {
    pub name: Name,
}

/// A [`model::Concept`] except that it might not exist yet.
#[derive(Owned!)]
pub struct Concept {
    pub name: Name,
    pub default_price: Option<Money>,
    pub gtin: Option<Gtin>,
}

/// A [`model::Object`] except that it might not exist yet.
#[derive(Owned!)]
pub struct Object {
    pub name: Name,
    pub parent: Option<model::Concept>,
}

pub type Name = String;
pub type NameRef<'a> = &'a str;