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use pest::{
iterators::{Pair, Pairs},
Parser,
};
use pest_derive::Parser;
use crate::html::escape;
#[derive(Parser)]
#[grammar = "grammar/markdown.pest"]
struct Grammar;
pub fn render(s: &str) -> String {
match Grammar::parse(Rule::file, s) {
Ok(pairs) => {
eprintln!("{pairs:#?}");
render_pairs(pairs)
}
Err(e) => panic!("{e}"),
}
}
pub fn render_pairs(p: Pairs<Rule>) -> String {
p.map(|p| render_ast(p)).collect::<Vec<_>>().join("")
}
pub fn render_ast(p: Pair<Rule>) -> String {
match p.as_rule() {
Rule::block => render_pairs(p.into_inner()),
Rule::header => format!("<h1>{}</h1>", render_pairs(p.into_inner())),
Rule::paragraph => format!("<p>{}</p>", render_pairs(p.into_inner())),
Rule::list => format!("<ul>{}</ul>", render_pairs(p.into_inner())),
Rule::list_item => format!("<li>{}</li>", render_pairs(p.into_inner())),
Rule::span => render_pairs(p.into_inner()),
Rule::text => escape(p.as_str()),
Rule::EOI => "".to_string(),
_ => todo!("{:?}", p.as_rule()),
}
}
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