Rust program to convert text with ANSI sequences into Minecraft /tellraw JSON

ansicraft.rs

use std::io::{stdin, Read};
use cansi::v3::*;
use serde::Serialize;

fn cansi_to_mc_color(color: Color) -> &'static str {
    match color {
        Color::Black => "black",
        Color::Red => "red",
        Color::Green => "green",
        Color::Yellow => "gold",
        Color::Blue => "blue",
        Color::Magenta => "light_purple",
        Color::Cyan => "aqua",
        Color::White => "white",
        Color::BrightBlack => "gray",
        Color::BrightRed => "red",
        Color::BrightGreen => "green",
        Color::BrightYellow => "yellow",
        Color::BrightBlue => "blue",
        Color::BrightMagenta => "light_purple",
        Color::BrightCyan => "aqua",
        Color::BrightWhite => "white",
    }
}

fn cansi_intensity_bool(intensity: Intensity) -> bool {
    match intensity {
        Intensity::Bold => true,
        Intensity::Normal => false,
        Intensity::Faint => false,
    }
}

#[derive(Serialize)]
struct TellrawBlock<'a> {
    text: &'a str,
    #[serde(skip_serializing_if = "Option::is_none")]
    color: Option<&'a str>,
    #[serde(skip_serializing_if = "Option::is_none")]
    underlined: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none")]
    italic: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none")]
    bold: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none")]
    strikethrough: Option<bool>,
}

fn main() {
    let mut input = String::new();
    stdin().read_to_string(&mut input).unwrap();

    let ansi_blocks = categorise_text(&input);
    let mut tellraw_blocks = Vec::with_capacity(ansi_blocks.len());

    for block in ansi_blocks {
        tellraw_blocks.push(TellrawBlock {
            text: block.text,
            color: block.fg.map(cansi_to_mc_color),
            underlined: block.underline,
            italic: block.italic,
            bold: block.intensity.map(cansi_intensity_bool),
            strikethrough: block.strikethrough,
        })
    }

    println!("{}", serde_json::to_string(&tellraw_blocks).unwrap());
}