// ==UserScript==
// @name         mandarake direct link
// @namespace    https://myconan.net
// @version      2.0.1
// @description  Make proper link on mandarake pages
// @author       nanaya
// @match        https://order.mandarake.co.jp/*
// @match        http://order.mandarake.co.jp/*
// @grant        none
// @run-at       document-start
// @downloadURL  https://hg.nanaya.net/ec-userscripts/raw-file/tip/mandarake-direct-link.user.js
// ==/UserScript==

'use strict'

const r18ConfirmLink = '#adult_confirm'
function fixR18Link (link) {
  if (!(link instanceof window.HTMLAnchorElement) || link.getAttribute('href') !== r18ConfirmLink) return

  link.setAttribute('href', `/order/detailPage/item?itemCode=${link.id}`)
  link.removeAttribute('class')
}

function removeR18Mark (node) {
  if (node.classList.contains('r18mark')) {
    node.remove()
    return true
  }

  for (const mark of node.querySelectorAll('.r18mark')) {
    mark.remove()
  }
}

function run (node) {
  if (!(node instanceof window.HTMLElement)) return
  if (removeR18Mark(node)) return

  fixR18Link(node)
  for (const link of node.querySelectorAll(`a[href='${r18ConfirmLink}']`)) {
    fixR18Link(link)
  }
}

function onMutate (mutations) {
  for (const mutation of mutations) {
    for (const node of mutation.addedNodes) {
      run(node)
    }
  }
}

const observer = new window.MutationObserver(onMutate)
observer.observe(document, { childList: true, subtree: true })
run(document.body)