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popoxee / Youtube Comment History

// ==UserScript==
// @name        Youtube Comment History
// @namespace   beitang.ca
// @match       *://*.youtube.com/*
// @grant       none
// @version     1.0
// @author      Mr. B
// @description Add a link to comment history in Youtube profile menu
// @license     MIT
// @run-at      document-end
// ==/UserScript==

(() => {
  'use strict'

  const LINK_ELEM_ID = "my-comment-history"

  function waitForMenu(callback) {
    let interval = setInterval(() => {
      const addedLink = document.querySelectorAll('#contentWrapper #channel-container #'+ LINK_ELEM_ID)[0]

      if (!addedLink) {
        const container = document.querySelectorAll('#contentWrapper #channel-container')[0]
        if (container) {
          clearInterval(interval)
          callback(container)
        }
      }
      else {
        clearInterval(interval)
      }
    }, 100)
  }

  function addLink(container) {
    const link = document.createElement("a")
    link.setAttribute("href", 'https://myactivity.google.com/page?hl=en&page=youtube_comments')
    link.setAttribute("target", "_blank")
    link.setAttribute("id", LINK_ELEM_ID)
    link.innerText = 'Comment History'

    container.appendChild(link)
    container.appendChild(document.createElement("br"))
  }

  document.body.addEventListener('click', () => waitForMenu(addLink))
})();