src/renderer.rs


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use rand::{Rng, rng};

#[derive(Clone)]
pub enum Renderer {
    Ansi,
    Color256,
    TrueColor,
    FakeColor,
}

impl Renderer {
    pub fn random() -> Self {
        let mut rng = rng();
        let renderers = [Self::Ansi, Self::Color256, Self::TrueColor, Self::FakeColor];
        let index = rng.random_range(0..renderers.len());
        renderers.get(index).unwrap_or(&Self::Ansi).clone()
    }
    pub fn render(&self, red: u8, green: u8, blue: u8) -> String {
        match self {
            Renderer::Ansi => {
                let color_offset =
                    ((u16::from(red) + u16::from(green) + u16::from(blue)) * 7) / (255 * 3);
                let color_number = 40 + color_offset;
                format!("\x1B[{color_number}m")
            }
            Renderer::Color256 => {
                let red_value = (u16::from(red) * 5) / 255;
                let green_value = (u16::from(green) * 5) / 255;
                let blue_value = (u16::from(blue) * 5) / 255;
                let color_number = 16 + 36 * red_value + 6 * green_value + blue_value;
                format!("\x1B[48;5;{color_number}m")
            }
            Renderer::TrueColor => {
                format!("\x1B[48;2;{red};{green};{blue}m")
            }
            Renderer::FakeColor => {
                format!("\x1B[28;2;{red};{green};{blue}m")
            }
        }
    }
}