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 } from './webpack-hook'
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const FILE_URL_MODULE_ID = 'iNJA'
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const MAGIC_REG = /^\d+(img|mp3|midi)\d(.+)$/
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type FileType = 'img' | 'mp3' | 'midi'
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const getApiUrl = (id: number, type: FileType, index: number): string => {
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// proxy
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return `https://musescore.now.sh/api/jmuse?id=${id}&type=${type}&index=${index}`
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}
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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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// reserve for future hook update
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const target = String.prototype
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const method = 'charCodeAt'
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const _fn = target[method]
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// This script can run before anything on the page,
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// so setting this function to be non-configurable and non-writable is no use.
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target[method] = function (i) {
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const m = this.match(MAGIC_REG)
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if (m) {
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resolve(m[2])
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magic = m[2]
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target[method] = _fn // detach
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}
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return _fn.call(this, i) as number
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}
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})
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export const getFileUrl = async (type: FileType, index = 0): Promise<string> => {
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const fileUrlModule = webpackHook(FILE_URL_MODULE_ID, {
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'6Ulw' (_, r, t) { // override
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t.d(r, 'a', () => {
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return type
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})
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},
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'VSrV' (_, r, t) { // override
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t.d(r, 'b', () => {
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return getApiUrl
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})
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},
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})
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const fn: (id: number, index: number, cb: (url: string) => any, magic: string) => string = fileUrlModule.a
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if (typeof magic !== 'string') {
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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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return new Promise((resolve) => {
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return fn(scoreinfo.id, index, resolve, magic as string)
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})
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}
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