93 lines
2.6 KiB
TypeScript
93 lines
2.6 KiB
TypeScript
/* eslint-disable no-extend-native */
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import scoreinfo from './scoreinfo'
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import { onPackLoad, webpackContext } from './webpack-hook'
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type FileType = 'img' | 'mp3' | 'midi'
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const AUTH_REG = /,((\d+\.\..+?)?function\(\)\{var \w=Array.prototype.slice.*?)\)(\[|\.then)/
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const PACK_ID_REG = /\((\{.*?"\})\[\w\]\|\|\w\)/
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const packIdPromise: Promise<Record<FileType, (string | number)>> = webpackContext.then((ctx) => {
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const ids = {
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img: '9',
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midi: '',
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mp3: '',
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}
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try {
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const fn = ctx.e.toString()
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const packsData = fn.match(PACK_ID_REG)[1] as string
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// eslint-disable-next-line no-new-func, @typescript-eslint/no-implied-eval
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const packs = Function(`return (${packsData})`)() as { [id: string]: string }
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Object.entries(packs).forEach(([id, name]) => {
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if (name.includes('audio') && !ids['mp3']) ids['mp3'] = id
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if (name.includes('piano_roll') && !ids['midi']) ids['midi'] = id
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})
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} catch (err) {
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console.error(err)
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}
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return ids
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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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const magicHookConstr = async (type: FileType) => {
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const packId = await packIdPromise
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// request pack
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// eslint-disable-next-line no-void, @typescript-eslint/no-unsafe-return
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void webpackContext.then((ctx) => ctx.e(packId[type]))
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return new Promise<string>((resolve) => {
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onPackLoad((pack) => {
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if (pack[0].includes(packId[type]) || pack[0].includes(+packId[type])) {
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Object.values(pack[1]).forEach((mod) => {
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const m = mod.toString().match(AUTH_REG)
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if (m) {
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const code = m[1]
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try {
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// eslint-disable-next-line no-new-func, @typescript-eslint/no-implied-eval
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const magic = Function(`return (${code})`)()
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resolve(magic)
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} catch (err) {
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console.error(err)
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}
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}
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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 magics: Record<FileType, Promise<string>> = {
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img: magicHookConstr('img'),
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midi: magicHookConstr('midi'),
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mp3: magicHookConstr('mp3'),
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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}&v2=1`
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}
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const getApiAuth = async (type: FileType, index: number): Promise<string> => {
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// eslint-disable-next-line no-void
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void index
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return magics[type]
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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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