Hide all Bugzilla comments by an author

Bugzilla hide by user.user.js

// ==UserScript==
// @name     Bugzilla hide by user
// @description Add a button to hide all comments by a user.
// @author   Adam Gashlin <agashlin@mozilla.com>
// @version  4
// @grant    none
// @match    https://bugzilla.mozilla.org/*
// ==/UserScript==

function quoteCssString(s) {
  return ('"'
       + (s.replace(RegExp('\\\\', 'g'), '\\\\')
           .replace(RegExp('"', 'g'), '\\"')
           .replace(RegExp('\n', 'g'), '\\n'))
       + '"');
}

function hideCommentsByEmail(email) {
  const selector = 'td.change-author a.email[href=' + quoteCssString(email) + ']';
  for (const cs of document.getElementsByClassName('change-set')) {
    if (cs.querySelector(selector)) {
	    cs.style.setProperty('display', 'none');
  	  //cs.querySelector('button.change-spinner').click();
    }
  }
}

function unHideAll() {
  for (const cs of document.getElementsByClassName('change-set')) {
    if (cs.style.getPropertyValue('display') == 'none') {
    	cs.style.removeProperty('display');
    }
  }
}

function onClickHide(event, cs) {
  event.preventDefault();
  const emailTag = cs.querySelector('td.change-author a.email');
  if (emailTag) {
    const profileEmail = emailTag.getAttribute('href');
    if (profileEmail) {
    	hideCommentsByEmail(profileEmail);
    }
  }
}

// add hide buttons
for (let cs of document.getElementsByClassName('change-set')) {
  const act = cs.querySelector('td.comment-actions');
  if (act) {
    if (!cs.querySelector('button.minus-minus-hack')) {
      const b = document.createElement('button');
      b.className = 'minor minus-minus-hack';
      b.appendChild(document.createTextNode('--'));
      b.addEventListener('click', (event) => onClickHide(event, cs));

      act.appendChild(b);
    }
  }
}

// add reset listener
const reset = document.getElementById('view-reset');
if (reset) {
  reset.addEventListener('click', unHideAll);
}