use std::io;
use std::io::{Read, Write};

pub trait FileWriteableType {
    fn write_to_file(self, file: &mut impl Write) -> io::Result<()>;
}

pub trait FileReadableType: Sized {
    fn read_from_file(file: &mut impl Read) -> io::Result<Self>;
}

pub trait WriteExt {
    fn write_data<T: FileWriteableType>(&mut self, data: T) -> io::Result<()>;
}

pub trait ReadExt {
    fn read_data<T: FileReadableType>(&mut self) -> io::Result<T>;
}

impl<W: Write> WriteExt for W {
    fn write_data<T: FileWriteableType>(&mut self, data: T) -> io::Result<()> {
        data.write_to_file(self)
    }
}

impl<R: Read> ReadExt for R {
    fn read_data<T: FileReadableType>(&mut self) -> io::Result<T> {
        T::read_from_file(self)
    }
}