telegram-randomize.rs

extern crate rand;

use rand::{Rand, Rng};
use std::env;

#[derive(Debug, Copy, Clone, Eq, PartialEq)]
enum Transformation {
	Nothing,
	Bold,
	Italic,
	Monospace,
	AddSpaceBefore,
	AddSpaceAfter
}

impl Rand for Transformation {
	fn rand<R: Rng>(rng: &mut R) -> Self {
		rng.choose(&[
			Transformation::Nothing,
			Transformation::Bold,
			Transformation::Italic,
			Transformation::Monospace,
			Transformation::AddSpaceBefore,
			Transformation::AddSpaceAfter,
		]).unwrap().clone()
	}
}

fn main() {
	let input = env::args().nth(1).unwrap();

	let mut output = String::new();

	for c in input.chars() {
		let mut t = rand::random::<Transformation>();

		if c == ' ' || c == '\n' || c == '\t' {
			if t == Transformation::Bold || t == Transformation::Italic || t == Transformation::Monospace {
				t = Transformation::AddSpaceBefore
			}
		}

		let addition = match t {
			Transformation::Nothing => format!("{}", c),
			Transformation::Bold => format!(" *{}* ", c),
			Transformation::Italic => format!(" _{}_ ", c),
			Transformation::Monospace => format!(" `{}` ", c),
			Transformation::AddSpaceBefore => format!(" {}", c),
			Transformation::AddSpaceAfter => format!("{} ", c)
		};

		output.push_str(&addition);
	}

	println!("{}", output);
}