wolf-graph-mermaid 0.1.0

Adds support for generating Mermaid diagrams from wolf-graph graphs.
Documentation 
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use std::fmt;

#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum Color {
    StaticNamed(&'static str),
    Named(String),
    Rgb(u8, u8, u8, Option<u8>),
}

impl Color {
    pub const fn new(name: &'static str) -> Self {
        Self::StaticNamed(name)
    }

    pub fn rgb(r: u8, g: u8, b: u8, a: Option<u8>) -> Self {
        Self::Rgb(r, g, b, a)
    }

    pub const RED: Color = Color::new("red");
    pub const GREEN: Color = Color::new("green");
    pub const BLUE: Color = Color::new("blue");
    pub const CYAN: Color = Color::new("cyan");
    pub const MAGENTA: Color = Color::new("magenta");
    pub const YELLOW: Color = Color::new("yellow");
    pub const BLACK: Color = Color::new("black");
    pub const WHITE: Color = Color::new("white");
    pub const GRAY: Color = Color::new("gray");
}

impl fmt::Display for Color {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Color::StaticNamed(name) => write!(f, "{}", name),
            Color::Named(name) => write!(f, "{}", name),
            Color::Rgb(r, g, b, a) => {
                let components = [r, g, b]
                    .into_iter()
                    .map(|c| format!("{:02x}", c))
                    .chain(a.map(|a| format!("{:02x}", a)))
                    .collect::<String>();
                write!(f, "#{}", components)
            }
        }
    }
}

impl<T: Into<String>> From<T> for Color {
    fn from(value: T) -> Self {
        Color::Named(value.into())
    }
}