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use std::fs::File;
use std::io::{Read, Write};
use std::path::Path;
#[derive(Clone, Copy, Debug)]
pub struct Volume {
pub volume: u16,
}
impl Volume {
fn from_reader<R: Read>(mut reader: R) -> u16 {
let mut contents = String::new();
reader.read_to_string(&mut contents).unwrap();
contents.trim().parse::<u16>().unwrap()
}
pub(crate) fn from_file<P: AsRef<Path>>(path: P) -> Option<u16> {
File::open(path).ok().map(Volume::from_reader)
}
fn save_to_writer<W: Write>(&self, writer: &mut W) {
writer
.write_all(self.volume.to_string().as_bytes())
.unwrap();
}
pub(crate) fn save_to_file<P: AsRef<Path>>(&self, path: P) {
let mut file = File::create(path).unwrap();
self.save_to_writer(&mut file)
}
}