topgrade/src/terminal.rs

use std::cmp::{max, min};
use termion;
use termion::color;

pub struct Terminal {
    width: Option<u16>,
}

impl Terminal {
    pub fn new() -> Self {
        Self {
            width: termion::terminal_size().map(|(w, _)| w).ok(),
        }
    }

    pub fn print_separator<P: AsRef<str>>(&self, message: P) {
        let message = message.as_ref();
        match self.width {
            Some(width) => {
                print!("\n{}―― {} ", color::Fg(color::LightWhite), message);
                let border = max(2, min(80, width as usize) - 3 - message.len());
                for _ in 0..border {
                    print!("―");
                }
                println!("{}", color::Fg(color::Reset));
            }
            None => {
                println!("―― {} ――", message);
            }
        }
    }

    pub fn print_warning<P: AsRef<str>>(&self, message: P) {
        let message = message.as_ref();

        match self.width {
            Some(_) => {
                println!(
                    "{}{}{}",
                    color::Fg(color::LightYellow),
                    message,
                    color::Fg(color::Reset)
                );
            }
            None => {
                println!("{}", message);
            }
        }
    }
}