hmd 0.4.13

Custom Markdown Engine for my personal blog.
Documentation 
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use crate::utils::*;
use crate::markdown::inline::decoration::render_bold_and_italic;
use crate::consts::*;


pub fn render_link(content: &Vec<u16>) -> Vec<u16> {

    let mut result = Vec::with_capacity(content.len());
    let mut curr_index = 0;

    while curr_index < content.len() {

        if is_valid_link(content, curr_index) {
            let link_end_index = get_bracket_end_index(content, curr_index).unwrap();

            // TODO: security check
            let ref_begin_index = link_end_index + 1;
            let ref_end_index = get_parenthesis_end_index(content, ref_begin_index).unwrap();

            let link = if curr_index > 0 && content[curr_index - 1] == U16_FACTORIAL {
                result.pop();  // `!`

                vec![
                    into_v16("<img src=\""),
                    content[ref_begin_index + 1..ref_end_index].to_vec(),
                    into_v16("\" alt=\""),
                    remove_special_characters(&content[curr_index + 1..link_end_index].to_vec()),
                    into_v16("\" title=\""),
                    remove_special_characters(&content[curr_index + 1..link_end_index].to_vec()),
                    into_v16("\">")
                ].concat()
            } else {
                vec![
                    into_v16("<a href=\""),
                    content[ref_begin_index + 1..ref_end_index].to_vec(),
                    into_v16("\">"),
                    render_link(&content[curr_index + 1..link_end_index].to_vec()),
                    into_v16("</a>")
                ].concat()
            };

            result = vec![result, link].concat();
            curr_index = ref_end_index;
        }

        else {
            result.push(content[curr_index]);
        }

        curr_index += 1;
    }

    render_bold_and_italic(&result)
}


fn is_valid_link(content: &Vec<u16>, index: usize) -> bool {

    content[index] == U16_LEFT_SQUARE_BRACKET && match get_bracket_end_index(content, index) {
        None => false,
        Some(i) => {
            i + 1 < content.len() && content[i + 1] == U16_LEFT_PARENTHESIS && match get_parenthesis_end_index(content, i + 1) {
                None => false,
                Some(_) => true
            }
        }
    }
}