hmd 0.4.13

Custom Markdown Engine for my personal blog.
Documentation 
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use crate::markdown::line::{Line, LineType};
use crate::utils::*;
use crate::consts::*;


pub fn render_toc(lines: &Vec<Line>, headers: &Vec<Line>) -> Vec<Line> {

    let mut result = Vec::with_capacity(lines.len());
    let toc = gen_toc(headers);

    for ln in lines.iter() {

        if ln.line_type == LineType::Tag && is_toc(&ln.content) {
            result.push(toc.clone());
        }

        else {
            result.push(ln.clone());
        }

    }

    result
}


fn is_toc(content: &Vec<u16>) -> bool {

    lowercase_and_remove_spaces(content) == into_v16("[[toc]]")
}


fn gen_toc(headers: &Vec<Line>) -> Line {

    let mut result = Vec::with_capacity(headers.len());

    result.push(into_v16("[[box]]\n[[center]][[big]]Table of Contents[[/big]][[/center]]\n[[left]]\n"));

    for header in headers.iter() {
        let (sharps, sharps_removed) = take_and_drop_while(&header.content, U16_SHARP);
        let indents_removed = drop_while(&sharps_removed, U16_SPACE);

        let line = vec![
            vec![U16_SPACE; (sharps.len() - 1) * 2],
            into_v16("- ["),
            indents_removed.clone(),
            into_v16("](#"),
            remove_special_characters(&indents_removed),
            into_v16(")\n")
        ].concat();

        result.push(line);
    }

    result.push(into_v16("[[/left]]\n[[/box]]\n"));

    Line {
        line_type: LineType::Toc,
        content: result.concat(),
        indent: 0
    }
}


pub fn collect_headers(lines: &Vec<Line>) -> Vec<Line> {

    lines.iter().filter(|ln| ln.line_type == LineType::Header).map(|ln| ln.clone()).collect()
}