aliexpress_krw_helper.js

// ==UserScript==
// @name         AliExpress KRW helper
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       koreapyj
// @match        https://www.aliexpress.com/p/trade/confirm.html*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=aliexpress.com
// @grant        none
// ==/UserScript==

(async function() {
    'use strict';

    const SELECTOR_ORDER_TOTAL = '[class^="pl-order-toal"][class$="content"]'
    const SELECTOR_CARD_BIN = 'img[class^="credit-card"]+span,img[class^="chosen-channel--chosen-channel-icon--"]+span'

    const sleep = ms => new Promise(r => setTimeout(r,ms))
    const do_job = async () => {
        try {
            document.querySelectorAll('[data-alistopdcc]').forEach(elem => elem.remove())
            const order = {...(()=>{
                const str = document.querySelector(SELECTOR_ORDER_TOTAL).textContent
                const match_idx = str.match(/[\d.,]+$/).index
                return {
                    currency: str.substr(0, match_idx),
                    total: +str.substr(match_idx)
                }
            })()}
            if(order.currency != 'US $') throw new EvalError

            const card = {
                bin: document.querySelector(SELECTOR_CARD_BIN).textContent.replace(/\D/g,'').substr(0,6)
            }
            switch(card.bin) {
                /* 신한 JCB */
                case '356900':
                    card.brandfee = 0
                    card.servicefee = 0.0018
                    card.bankname='shinhan'
                    break
                default:
                    /* 신한 URS */
                    if(card.bin.match(/^356(?:297|90(?:7|8))$/)) {
                        card.brandfee = 0.01
                        card.servicefee = 0.0018
                        card.bankname='shinhan'
                        break
                    }
                    /* 신한 AMEX */
                    if(card.bin.match(/^377(?:178|98(?:3|8))$/)) {
                        card.brandfee = 0.014
                        card.servicefee = 0.0018
                        card.bankname='shinhan'
                        break
                    }
                    /* 신한 VISA */
                    if(card.bin.match(/^4(?:0(?:0(?:278|772)|3965|4678|5753)|2(?:2155|9612)|3(?:1236|4976|6420|8676)|4(?:5090|9914)|5(?:18(?:42|45))|6(?:0561|1954|5887)|7(?:2(?:175|246|429)|8292)|8(?:6678|7033|9023))$/)) {
                        card.brandfee = 0.01
                        card.servicefee = 0.0018
                        card.bankname='shinhan'
                        break
                    }
                    /* 신한 master */
                    if(card.bin.match(/^5(?:1(?:0737|1187|5594|7134)|2(?:1189|8638)|3(?:5180|7943|8413)|4(?:2879|9840)|59410)$/)) {
                        card.brandfee = 0.01
                        card.servicefee = 0.0018
                        card.bankname='shinhan'
                        break
                    }
                    /* 신한 UnionPay */
                    if(card.bin.match(/^62(?:1078|4331|4348|5178)$/)) {
                        card.brandfee = 0
                        card.servicefee = 0.0018
                        card.bankname='shinhan'
                        break
                    }
                    throw new EvalError
            }

            card.currency = +(await (await fetch(`https://api.dcmys.net/exchange-rate/krw-usd/tt-sell/${card.bankname}?now=${(new Date).toISOString().replace(/T.*$/,'')}`)).json())

            order.total_in_krw = (order.total * (1 + card.brandfee)) * card.currency + order.total * card.servicefee

            console.log('AliStopDCC:', card, order)

            Array.from(document.querySelectorAll('[class^="pl-order-toal"][class$="content"]')).forEach((cont) => {
                const parent = cont.parentNode
                const new_parent = parent.cloneNode(true)
                new_parent.setAttribute('data-alistopdcc','')
                const elem_title = new_parent.querySelector('[class$="title-wrap"]')
                    elem_title.removeAttribute('style')
                    elem_title.textContent = ''
                const elem_content = new_parent.querySelector('[class$="content"]')
                    elem_content.removeAttribute('style')
                    elem_content.textContent = `(카드청구금액 ${(~~order.total_in_krw).toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",")}원)`
                    elem_content.setAttribute('title', `국제브랜드수수료 ${(~~(card.brandfee*10000))/100}%\n해외서비스수수료 ${(~~(card.servicefee*10000))/100}%\n해외환율고정서비스 적용시`)
                parent.after(new_parent)
            })
        } catch(ex) {
            if(!(ex instanceof EvalError)) {
                console.error('AliStopDCC:', ex)
            }
        }
    }

    while(1) {
        const elem_ot = document.querySelector(SELECTOR_ORDER_TOTAL)
        const elem_cb = document.querySelector(SELECTOR_CARD_BIN)
        if(!elem_ot || !elem_cb) {
            await sleep(100)
            continue
        }
        break
    }

    do_job()

    const timers = {}
    const observer = new MutationObserver((mutations) => {
        mutations.forEach((mutation) => {
            if(timers.mutation) {
                clearTimeout(timers.mutation)
            }
            timers.mutation = setTimeout(()=>{
                timers.mutation = null

                do_job()
            }, 1000)
        })
    })
    const observer_conf = {
        attributes: true,
        characterData: true,
        childList: true,
    }
    observer.observe(document.body, observer_conf)
    console.log('observer installed')
})()