github_starred_scraper.user.js

// ==UserScript==
// @name         New Userscript
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://github.com/*/*/stargazers*
// @grant        window.close
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_deleteValue
// @grant        GM_addValueChangeListener
// @grant        GM_openInTab
// @grant        GM_registerMenuCommand
// ==/UserScript==

(function() {
  'use strict';
  debugger
  let isController = !GM_getValue('has-controller', false)
  if (isController) {
    GM_registerMenuCommand('Scrape starrers', run)
  } else {
    run()
  }
})();

function run () {
  let isController = !GM_getValue('has-controller', false)
  let users = GM_getValue('collected-users') || '[]'
  users = JSON.parse(users)

  if (isController) {
    GM_setValue('has-controller', true)
    GM_setValue('collected-users', users)
    GM_setValue('done-collecting', false)

    GM_addValueChangeListener('done-collecting', (a, b, c, remote) => {
      if (!remote) return
      console.log(new Set(JSON.parse(GM_getValue('collected-users'))))
      GM_deleteValue('has-controller')
      GM_deleteValue('collected-users')
      GM_deleteValue('done-collecting')
    })
  
  }

  let els = document.querySelectorAll('a[data-hovercard-type="user"]')
  for (let el of els) {
    let name = el.innerHTML
    users.push(name)
  }

  GM_setValue('collected-users', JSON.stringify(users))

  let next = document.querySelector('.paginate-container > * > a:nth-child(2)')
  if (next) {
    let url = next.getAttribute('href')
    
    setTimeout(() => {
      GM_openInTab(url, {
        active: false,
        setParent: true
      })
      if (!isController) window.close()
    }, 1200)
  } else {
    GM_setValue('done-collecting', true)
  }
}