main.rs

use std::env;
use std::io::{self, Write};
use std::process;

fn embiggen_word(word: String) -> String {
    word.chars().map(|c| {
        match c {
            '!' => ":exclamation:".to_string(),
            '?' => ":question:".to_string(),
            '0' => ":zero:".to_string(),
            '1' => ":one:".to_string(),
            '2' => ":two:".to_string(),
            '3' => ":three:".to_string(),
            '4' => ":four:".to_string(),
            '5' => ":five:".to_string(),
            '6' => ":six:".to_string(),
            '7' => ":seven:".to_string(),
            '8' => ":eight:".to_string(),
            '9' => ":nine:".to_string(),
            '™' => ":tm:".to_string(),
            s => {
                format!(":big-{}:", s)
            },
        }
    }).collect()
}

fn run() -> Result<(), std::io::Error> {
    let mut stdout = io::stdout();
    let mut map = env::args().skip(1).map(embiggen_word);
    stdout.write(b":sparkles:")?;
    if let Some(i) = map.next() {
        stdout.write(i.as_bytes())?;
        for i in map {
            stdout.write(b" ")?;
            stdout.write(i.as_bytes())?;
        }
    }
    stdout.write(b":end_sparkles:")?;
    Ok(())
}

fn main() {
    if let Err(e) = run() {
        eprintln!("Ohno: {:?}", e);
        process::exit(1);
    }
}