use std::convert::TryFrom;
use std::io::Write;

use clap::ArgMatches;

use crate::error;
use crate::database::Database;
use crate::config::Config;

pub mod r#in;
pub mod display;

pub trait Command<'a> {
    type Args: TryFrom<&'a ArgMatches<'a>>;

    fn handle<D: Database, W: Write>(args: Self::Args, db: &mut D, out: &mut W, config: &Config) -> error::Result<()>;
}