65 lines
1.7 KiB
TypeScript
65 lines
1.7 KiB
TypeScript
/* eslint-disable no-extend-native */
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import scoreinfo from './scoreinfo'
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import { webpackHook, webpackGlobalOverride, ALL } from './webpack-hook'
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let authModuleId: string
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const AUTH_FN = '+3],22,-1044525330)'
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const MAGIC_ARG_INDEX = 1
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type FileType = 'img' | 'mp3' | 'midi'
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/**
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* I know this is super hacky.
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*/
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let magic: Promise<string> | string = new Promise((resolve) => {
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// todo: hook module by what it does, not what it is called
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webpackGlobalOverride(ALL, (n, r, t) => { // override
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const fn = n.exports
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if (typeof fn === 'function' && fn.toString().includes(AUTH_FN)) {
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if (!authModuleId && n.i) {
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authModuleId = n.i
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n.exports = (...args) => {
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if (magic instanceof Promise) {
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magic = args[MAGIC_ARG_INDEX]
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resolve(magic)
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}
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return fn(...args) as string
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}
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}
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}
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})
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})
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const getApiUrl = (type: FileType, index: number): string => {
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return `/api/jmuse?id=${scoreinfo.id}&type=${type}&index=${index}`
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}
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const getApiAuth = async (type: FileType, index: number): Promise<string> => {
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if (magic instanceof Promise) {
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// force to retrieve the MAGIC
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const el = document.querySelectorAll('.SD7H- > button')[3] as HTMLButtonElement
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el.click()
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magic = await magic
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}
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const str = String(scoreinfo.id) + type + String(index)
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const fn: (str: string, magic: string) => string = webpackHook(authModuleId)
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return fn(str, magic)
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}
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export const getFileUrl = async (type: FileType, index = 0): Promise<string> => {
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const url = getApiUrl(type, index)
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const auth = await getApiAuth(type, index)
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const r = await fetch(url, {
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headers: {
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Authorization: auth,
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},
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})
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const { info } = await r.json()
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return info.url as string
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}
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