inline-comments-stackoverflow.ts

function replaceHashComment(line: string): string {
    const makeInlineComment = (comment: string) => {
        const value = comment?.trim();
        if (!value) {
            return '<##>';
        }
        return `<# ${value} #>`;
    };
    const parts = line.split('#');
    if (parts.length === 1) { // No hash
        return line;
    } else  if (parts.length === 2) {
        const code = parts[0];
        return code + makeInlineComment(parts[1]);
    } else {
        const firstDashIndex = parts[0].length;
        if (firstDashIndex === 0) { // Starts with dash
            return makeInlineComment(parts[1]);
        }
        // Do not inline if it's inline comment
        const characterBeforeDash = line[firstDashIndex - 1];
        if (characterBeforeDash === '<') {
            for (let i = 1; i < parts.length; i++) {
                const characterAfterNextDash = parts[i][0];
                if (characterAfterNextDash === '>') {
                    return line;
                }
            }
        }
        const textAfterFirstDash = line.substring(firstDashIndex + 1);
        return parts[0] + makeInlineComment(textAfterFirstDash);
    }
}