const SPLIT_REGEXP = /(<[^>]+>)/;
const META_WORD_REGEXP = /\/((?:\\.|[^/])+)\//g;
const WORD_BEFORE = '<span class="highlighted-word">';
const WORD_AFTER = '</span>';
export const highlightWordInLine = (node, pattern) => {
    node.content = node.content
        .split(SPLIT_REGEXP)
        .map((text) => {
        if (!text || text[0] === '<') {
            return text;
        }
        return text.replaceAll(pattern, (word) => `${WORD_BEFORE}${word}${WORD_AFTER}`);
    })
        .join('');
};
export const parseMetaHighlightWords = (meta) => {
    if (!meta)
        return [];
    const match = Array.from(meta.matchAll(META_WORD_REGEXP));
    return (match
        // Escape backslashes
        .map((v) => v[1].replace(/\\(.)/g, '$1')));
};
/**
 * ```js /Hello|Hi/
 */
export const metaWordHighlight = (parser, meta) => {
    const words = parseMetaHighlightWords(meta);
    if (words.length) {
        const pattern = new RegExp(`${words.join('|')}`, 'g');
        parser.line((line) => highlightWordInLine(line, pattern));
    }
};