stackoverflow attribution minimizer

attribution-minimizer.user.js

// ==UserScript==
// @name        StackOverflow Minimized Attribution
// @namespace   github@impliedgg
// @match       https://stackoverflow.com/*
// @version     1.0
// @author      github@impliedgg
// @description For StackOverflow. Reduces the attribution text for StackOverflow snippets to one line, while still citing the URL, author, date retrieved, and license.
// @grant GM_setClipboard
// ==/UserScript==

document.addEventListener('copy', function (e) {
  function asComment(text, lang) {
    let bestCandidate = null;
    let parserContains = hljs.getLanguage(lang).contains;
    for (let containedIdx in parserContains) {
      let contained = parserContains[containedIdx];
      if (contained.scope === 'comment') {
        if (bestCandidate == null) {
          bestCandidate = contained;
        } else if (bestCandidate.end != '$' && contained.end == '$') {
          bestCandidate = contained;
        }
        // if not prefix-only and not first, simply pass over this comment type
      }
    }
    if (bestCandidate == null) {
      return text; // pass through without commenting, you're on your own lmao
    } else {
      let begin = null;
      let end = null;
      // these are evil one-liners, but they: 1. convert regex begin/end tokens to strings 2. remove escaped backslashes...
      if (typeof bestCandidate.begin === 'string') { begin = bestCandidate.begin.replace('\\', ''); } else { begin = String(bestCandidate.begin).replace(/^\//, '').replace(/\/$/, '').replace('\\', ''); }
      if (typeof bestCandidate.end === 'string') { end = bestCandidate.end.replace('\\', ''); } else { end = String(bestCandidate.end).replace(/^\//, '').replace(/\/$/, '').replace('\\', ''); }
      if (end == '$') {
        return begin + ' ' + text; // just prefix
      } else {
        return begin + ' ' + text + ' ' + end; // prefix and suffix
      }
    }
  }
  // bypass logic if we're not copying from code element
  if (e.srcElement.localName === 'code') {
    // walk up DOM until we hit an element with  .answer, which is always has *this* answer's data
    let answerObject = e.srcElement.parentElement;
    while (!answerObject.classList.contains('answer')) {
      answerObject = answerObject.parentElement;
    }
    /*
     * we want output as follows:
     * commented: https://stackoverflow.com/a/idhere - username - YYYY-MM-DD - CC BY-SA 3.0
     * snippet goes here.......
    */
    let attributionText = `https://stackoverflow.com/a/${answerObject.dataset.answerid} - ${answerObject.dataset.authorUsername} - ${new Date().toISOString().slice(0, 10)} - CC BY-SA 3.0`;
    let finalText = asComment(attributionText, e.srcElement.result.language) + '\n' + e.srcElement.textContent;
    setTimeout(() => { GM_setClipboard(finalText, 'text/plain'); }, 50); // if we don't do this setTimeout the actual code overwrites our custom copy lmao
    e.preventDefault();
  }
});