41 changed files with 1056 additions and 3860 deletions
--- a/.eslintrc
+++ b/.eslintrc
@ -20,8 +20,6 @@
        "no-useless-constructor": "off",
        "@typescript-eslint/no-useless-constructor": "error",
        "no-dupe-class-members": "off",
-        "no-void": "off",
-        "no-use-before-define": "off",
        "@typescript-eslint/no-dupe-class-members": "error",
        "@typescript-eslint/no-floating-promises": "warn",
        "@typescript-eslint/member-delimiter-style": "warn",
--- a/.github/workflows/get-signed-ext.sh
+++ b/.github/workflows/get-signed-ext.sh
@ -1,21 +0,0 @@
-
-API_URL=https://addons.mozilla.org/api/v4/addons/addon/$EXT_ID/versions/
-
-# wait for maximum 15 min
-for i in {1..15}
-do 
-  url=$(\
-    wget -q $API_URL -O - | \
-    jq -r ".results[] | select(.version==\"$VERSION\") | .files[0].url" \
-  )
-
-  if [ -n "$url" ]; then
-    echo "v$VERSION available!"
-    wget -nv $url -P ${OUT_DIR:-./}
-    exit
-  else
-    echo "v$VERSION unavailable"
-  fi
-
-  sleep 1m
-done
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@ -13,16 +13,11 @@ on:
      ref:
        description: 'The branch, tag or SHA to release from'
        required: false
-      chrome_ext_url:
-        description: 'URL to the Chrome Extension crx'
-        required: true

 env:
  VERSION: ${{ github.event.inputs.version }}
  NPM_TAG: ${{ github.event.inputs.npm_tag }}
  REF: ${{ github.event.inputs.ref || github.sha }}
-  ARTIFACTS_DIR: ./.artifacts
-  CHROME_EXT_URL: ${{ github.event.inputs.chrome_ext_url }}

 jobs:
  release:
@ -53,75 +48,13 @@ jobs:
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }} # 0301...

-      - name: NPM Publish msdl
-        run: |
-          cd ./src/msdl
-          sed -i "s/%VERSION%/$VERSION/" package.json
-          npm publish --tag $NPM_TAG
-          cd -
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
-
-      - name: Publish Firefox Extension
-        id: web-ext-build
-        uses: kewisch/action-web-ext@v1
-        continue-on-error: true
-        with:
-          cmd: sign
-          source: dist/ext.zip
-          channel: listed
-          apiKey: ${{ secrets.AMO_SIGN_KEY }}
-          apiSecret: ${{ secrets.AMO_SIGN_SECRET }}
-
-      - run: |
-          mkdir -p $ARTIFACTS_DIR
-          cp dist/main.js $ARTIFACTS_DIR/musescore-downloader.user.js
-          cp dist/ext.zip $ARTIFACTS_DIR/musescore-downloader.webextension.zip
-          wget -q $CHROME_EXT_URL -P $ARTIFACTS_DIR/
-          wget -q https://github.com/Xmader/musescore-downloader/archive/$REF.tar.gz -O $ARTIFACTS_DIR/source.tar.gz
-      - run: bash ./.github/workflows/get-signed-ext.sh
-        env:
-          EXT_ID: musescore-downloader
-          OUT_DIR: ${{ env.ARTIFACTS_DIR }}
-
-      - name: Upload to IPFS
-        uses: aquiladev/ipfs-action@v0.1.5
-        id: ipfs
-        with:
-          path: ${{ env.ARTIFACTS_DIR }}
-          service: infura
-          verbose: true
-
      - name: Github Release
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          IPFS_HASH: ${{ steps.ipfs.outputs.hash }}
        run: |
-          cd $ARTIFACTS_DIR
-          rm *.tar.gz
-
-          files=$(ls .)
-          assets=()
-          for f in $files; do [ -f "$f" ] && assets+=(-a "$f"); done
-
-          SHORT_SHA=$(echo $REF | cut -c 1-7)
-
          hub release create \
-            "${assets[@]}" \
+            -a "dist/main.js#userscript.js" \
+            -a "dist/ext.zip#webextension.zip" \
            -m v$VERSION \
-            -m "IPFS Hash: [$IPFS_HASH](https://ipfs.io/ipfs/$IPFS_HASH)" \
-            -m "Guess what? Mirrors!<br><https://github.com/musescore/MuseScore/tree/$SHORT_SHA><br><https://github.com/github/dmca/tree/$SHORT_SHA>" \
            -t $REF \
            v$VERSION
-
-      - name: Archive to archive.org
-        continue-on-error: true
-        env:
-          REPO: ${{ github.repository }}
-        run: |
-          URL="https://github.com/$REPO/releases/"
-          curl "https://web.archive.org/save/" \
-            --compressed -s \
-            -H 'Content-Type: application/x-www-form-urlencoded' \
-            --data-raw "url=$URL&capture_all=on" \
-              | grep github
--- a/.gitignore
+++ b/.gitignore
@ -67,4 +67,3 @@ typings/

 dist/cache
 dist/ext*
-dist/cli.js
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@ -15,5 +15,4 @@
    "editor.codeActionsOnSave": {
        "source.fixAll.eslint": true
    },
-    "typescript.tsdk": "node_modules/typescript/lib",
 }
--- a/1
+++ b/1
@ -1 +0,0 @@
-msdl.librescore.org
--- a/2
+++ b/2
@ -1,6 +1,6 @@
 MIT License

-Copyright (c) 2019-2021 Xmader
+Copyright (c) 2019-2020 Xmader

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
--- a/README.md
+++ b/README.md
@ -1,13 +1,12 @@

 # musescore-downloader

-**English** | [简体中文](#musescore-downloader-1)  | [Español](#musescore-downloader-2)  | [Italian](#musescore-downloader-3) 
+**English** | [简体中文](#musescore-downloader-1)

 > download sheet music from musescore.com for free, no login or Musescore Pro required

 **Star this project on [Github](https://github.com/Xmader/musescore-downloader) and [Gitlab](https://gitlab.com/Xmader/musescore-downloader)** (Mirror)   
-
-[![Discord](https://img.shields.io/discord/774491656643674122?color=7289da&label=Discord&logo=discord)](https://discord.gg/DKu7cUZ4XQ)
+**Rate this on [Greasy Fork](https://greasyfork.org/scripts/391931)**

 Need dataset of musescore.com for analysis / machine learning? try [musescore-dataset](https://github.com/Xmader/musescore-dataset).

@ -38,34 +37,13 @@ There is an article on their website: [Score download becomes a part of the Pro

 ## Installation

-### CLI Usage
-
-(recommended, more bulletproof)
-
-1. Install Node.js LTS (https://nodejs.org/)
-2. Open a command line terminal or command prompt
-3. Type `npx msdl`, enter  
-  (`npx msdl` will always run the latest version)
-4. Follow the instructions
-
-[source code](/src/cli.ts)
-
-### Install as Userscript
-
 This script is available as a [Userscript](https://en.wikipedia.org/wiki/Userscript). To use this Userscript, you need to first install a [user script manager](https://greasyfork.org/en/help/installing-user-scripts), like Tampermonkey.

-1. Install [Tampermonkey](https://www.tampermonkey.net/)
+Install from [Greasy Fork](https://greasyfork.org/scripts/391931)

-2. ~~Install from [Greasy Fork](https://greasyfork.org/scripts/391931).~~   [#42](https://github.com/Xmader/musescore-downloader/issues/42)  
-Install this script from <https://msdl.librescore.org/install.user.js>
+View this project on [Github](https://github.com/Xmader/musescore-downloader) | [Gitlab](https://gitlab.com/Xmader/musescore-downloader) (Mirror)

-### Install as Web Extension
-
-The alternative method is to install this script as a Chrome or Firefox extension.
-
-You may install the browser extension directly from [addons.mozilla.org (for Firefox)](https://addons.mozilla.org/en-US/firefox/addon/musescore-downloader/) or [chrome web store (for Chrome and Chromium based browsers)](https://chrome.google.com/webstore/detail/mhdlcdhakmmikknpefblmnhdhjloanjc).
-
-The up-to-date version can be found on the [Github Releases](https://github.com/Xmader/musescore-downloader/releases) page.
+This repo is also available on IPFS to avoid DMCA takedown.

 ## Building Instructions

@ -77,12 +55,6 @@ npm run build     # build as User Script
 npm run pack:ext  # pack Web Extension
 ```

-## Mirrors
-
-* View this project on [Github](https://github.com/Xmader/musescore-downloader) (Main repo) | [Gitlab](https://gitlab.com/Xmader/musescore-downloader) (Mirror)
-
-* This repo is also available on IPFS to avoid DMCA takedown: [ipns://msdl.librescore.org](https://ipfs.io/ipns/msdl.librescore.org/)
-
 ## Feedback

 [Github Issues](https://github.com/Xmader/musescore-downloader/issues)
@ -118,14 +90,13 @@ No, the API document is on https://developers.musescore.com/.

 # musescore-downloader

-[English](#musescore-downloader) | **简体中文**  | [Español](#musescore-downloader-2) 
+[English](#musescore-downloader) | **简体中文**  
 *中英文版本项目 README 分开撰写，中文版较不完整。如果有能力，请阅读英文版。*

 > 免登录、免 Musescore Pro，下载 musescore.com 上的曲谱

 **在 [Github](https://github.com/Xmader/musescore-downloader) 和 [Gitlab](https://gitlab.com/Xmader/musescore-downloader)** (镜像) **上给项目打星**  
-
-[![Discord](https://img.shields.io/discord/774491656643674122?color=7289da&label=Discord&logo=discord)](https://discord.gg/DKu7cUZ4XQ)
+**在 [Greasy Fork](https://greasyfork.org/scripts/391931) 上给项目评分**  

 ![](https://cdn.statically.io/gh/Xmader/musescore-downloader/master/screenshot.png?env=dev)

@ -141,234 +112,10 @@ No, the API document is on https://developers.musescore.com/.

 脚本以 [Userscript](https://en.wikipedia.org/wiki/Userscript) 的形式提供，需要事先安装一个 [用户脚本管理器](https://greasyfork.org/zh-CN/help/installing-user-scripts)，例如 Tampermonkey

+在 [Greasy Fork](https://greasyfork.org/scripts/391931) 上查看、安装
+
 在 [Github](https://github.com/Xmader/musescore-downloader) 上查看、讨论、更新

 ## License

 MIT
-
---
-
-# musescore-downloader
-
-[English](#musescore-downloader) | [简体中文](#musescore-downloader-1)  | **Español**
-
-> descarga partituras de musescore.com de forma gratuita, no se requiere iniciar sesión o Musescore Pro
-
-**Dale una estrella a este proyecto en [Github](https://github.com/Xmader/musescore-downloader) y [Gitlab](https://gitlab.com/Xmader/musescore-downloader)** (Respaldo)   
-
-[![Discord](https://img.shields.io/discord/774491656643674122?color=7289da&label=Discord&logo=discord)](https://discord.gg/DKu7cUZ4XQ)
-
-¿Necesita un conjunto de datos de musescore.com para análisis / Machine Learning? prueba [musescore-dataset](https://github.com/Xmader/musescore-dataset).
-
-![](https://cdn.statically.io/gh/Xmader/musescore-downloader/master/screenshot.png?env=dev)
-
-## Fair Use
-
-Solo para fines de investigación y estudio
-
-## Acerca de
-
-Se requiere Musescore Pro ($ 6.99/mes) para descargar partituras de musescore.com desde hace poco.  
-(Sin embargo, hace unos meses, se podían descargar gratis).
-
-La compañía Musescore dijo que es debido a derechos de autor y licencias, y deben pagar a los propietarios de los derechos de autor.
-
-Muchas canciones en musescore.com ya son de ** dominio público **, lo que significa que el autor las publicó en el dominio público o que el autor ha estado muerto durante más de 70 años.
-¿Necesitan pagarle a compositores que murieron hace cientos de años?
-*Actualización: Las partituras de dominio público se pueden descargar sin Musescore Pro ahora, pero aún se necesita de una cuenta para acceder a ellas.*
-
-Además, hay muchos autores de partituras en musescore.com que crearon sus propias canciones y las publicaron bajo la licencia [CC-BY-**NC** (Creative Commons Attribution-**NonCommercial**)](https://creativecommons.org/licenses/by-nc/4.0/).  
-¿No es ilegal que las vendan para generar **ganancias**?
-*Nota: Poner anuncios (para vender Musescore Pro) en el sitio web también significa que lo usan para generar ingresos. *
-
-Esto es absolutamente inaceptable, y el único propósito es generar ganancias robando.
-
-Hay un artículo en su sitio web: [La descarga de partituras se convierte en parte de la suscripción Pro](https://musescore.com/groups/improving-musescore-com/discuss/5044610)
-
-## Instalación
-
-### Instalar como Script de Usuario
-
-Este script está disponible como un [Script de usuario](https://en.wikipedia.org/wiki/Userscript). Para utilizar este script, primero debe instalar un [administrador de script de usuario](https://greasyfork.org/en/help/installing-user-scripts), como Tampermonkey.
-
-1. Instala [Tampermonkey](https://www.tampermonkey.net/)
-
-2. ~~Instalar desde [Greasy Fork](https://greasyfork.org/scripts/391931).~~   [#42](https://github.com/Xmader/musescore-downloader/issues/42)  
-Instale este script desde <https://msdl.librescore.org/install.user.js>
-
-### Instalar como Extensión Web
-
-El método alternativo es instalar este script como una extensión de Chrome o Firefox.
-
-Puedes instalar la extensión del navegador directamente desde [addons.mozilla.org (para Firefox)](https://addons.mozilla.org/en-US/firefox/addon/musescore-downloader/) o [chrome web store (para Chrome y navegadores basados en Chromium)](https://chrome.google.com/webstore/detail/fmmnkcdlphpgbdcdfnjkldfljedbbokp).
-
-La versión más reciente se puede encontrar en la página de [Github Releases](https://github.com/Xmader/musescore-downloader/releases).
-
-## Instrucciones de Compilación
-
-Asegúrate de tener el entorno [Node.js](https://nodejs.org/en/) instalado.
-
-```bash
-npm install
-npm run build     # build as User Script
-npm run pack:ext  # pack Web Extension
-```
-
-## Archivos
-
-* Mira este proyecto en [Github](https://github.com/Xmader/musescore-downloader) (Principal) | [Gitlab](https://gitlab.com/Xmader/musescore-downloader) (Respaldo)
-
-* Este repositorio también está disponible en IPFS para evitar la eliminación por parte de DMCA. [ipns://msdl.librescore.org](https://ipfs.io/ipns/msdl.librescore.org/)
-
-## Feedback
-
-[Github Issues](https://github.com/Xmader/musescore-downloader/issues)
-
-## Licencia
-
-MIT
-
-## Acerca de la Solicitud de Eliminación
-
-Recibí un [correo de solicitud de elimnacion l](https://github.com/Xmader/musescore-downloader/issues/5) de uno de los desarrolladores de Musescore, pero me gustaría decir algo en contra de esto.
-
-> Todo el contenido que no es de dominio público en musescore.com tiene licencia de los principales editores de música (Alfred, EMI, Sony, etc.). Distribuir contenido de musical licenciado de Musescore.com de forma gratuita viola sus derechos.
-
-En primer lugar, si violé los derechos de los principales editores de música, ellos deberían enviar la solicitud de eliminación en lugar de los desarrolladores de Musescore.
-
-En segundo lugar, musescore.com no es un simple sitio web para compartir música. Los autores de partituras deben transcribir y recomponer las canciones originales en partituras, no solo copiar archivos de cualquier otro lugar a musescore.com. Como resultado, la licencia debe centrarse en los derechos de transcripción/recomposición de los autores de las partituras, en lugar de los derechos de compartir la música en algunos sitios web.
-
-En tercer lugar, la propiedad de los derechos de autor de los contenidos de musescore.com no está clara. No todas las canciones que no son de dominio público en musescore.com son propiedad de las principales editoriales de música. Hay muchos pequeños editores de música y compositores independientes; Las canciones pueden tener licencias gratuitas como Creative Commons. Además, hay muchos autores que crearon sus propias canciones y publicaron la partitura en musescore.com. ¿Musescore.com le paga a esos autores?
-
-Si no podemos ver pruebas de que musescore.com realmente paga la tarifa de licencia a los propietarios de los derechos de autor, podemos pensar que es solo una excusa para obtener ganancias robando.
-
-
-> utilizo ilegalmente nuestra API privada con contenido de música licenciada.
-
-No, el documento de la API está en https://developers.musescore.com/.
-
-
-**Lanzaré una alternativa de código abierto (GPLv3), sin servidor, offline, y totalmente gratuita a musescore.com, [LibreScore](https://github.com/LibreScore). ETodos son bienvenidos a unirse al desarrollo del proyecto abriendo un problema o [enviándome un correo electrónico.](mailto:i@xmader.com).**
-
-**Además, estoy desarrollando musescore.js. Podría convertir un archivo mscz en cualquier formato que admita el software Musescore, y en el navegador.** Dado que el software Musescore es de código abierto bajo [GPL](https://github.com/musescore/MuseScore/blob/master/LICENSE.GPL), Podría traducir el código fuente a js o compilarlo en asm.js/WASM.
-
---
-
-# musescore-downloader
-
-[English](#musescore-downloader) | [简体中文](#musescore-downloader-1) | [Español](#musescore-downloader-2) | **Italian**
-
-> Scarica spartiti da musescore.com gratuitamente, non è richisto login o Musescore Pro.
-
-**Avvia questo progetto su [Github](https://github.com/Xmader/musescore-downloader) e [Gitlab](https://gitlab.com/Xmader/musescore-downloader)** (Mirror)   
-
-[![Discord](https://img.shields.io/discord/774491656643674122?color=7289da&label=Discord&logo=discord)](https://discord.gg/DKu7cUZ4XQ)
-
-Hai bisogno di datset di musescore.com per l'analisi/machine learning? Prova [musescore-dataset](https://github.com/Xmader/musescore-dataset).
-
-![](https://cdn.statically.io/gh/Xmader/musescore-downloader/master/screenshot.png?env=dev)
-
-## Utilizzo leale
-
-Solo per scopi di ricerca e studio
-
-## In breve
-
-Di recente è necessario un account Musescore Pro ($6,99/mese) per scaricare spartiti da musescore.com.
-(Tuttavia, alcuni mesi fa, era possibile scaricare gratuitamente.)
-
-La società Musescore ha affermato che a causa di copyright e licenze, devono pagare i proprietari del copyright.
-
-Molte musiche su musescore.com sono già di **Pubblico Dominio**, il che significa che o l'autore le ha pubblicate in pubblico dominio o l'autore è morto da oltre 70 anni.
-Devono pagare anche i compositori che sono morti centinaia di anni fa?
-*Aggiornamento: gli spartiti di Dominio Pubblico, ora possono essere scaricati senza Musescore Pro, ma hai ancora bisogno di un account per poter scaricare.*
-
-
-Inoltre, ci sono molti autori di spartiti su musescore.com che hanno creato le proprie canzoni e le hanno pubblicate sotto licenza [CC-BY-**NC** (Creative Commons Attribution-**NonCommercial**)](https://creativecommons.org/licenses/by-nc/4.0/).  
-È illegale venderli **a scopo di lucro**? 
-*Nota: Mettere annunci (per vendere Musescore Pro) sul sito web significa anche che lo usano per generare entrate.*
-
-Questo è assolutamente inaccettabile e l'unico scopo è trarre profitto dal furto.
-
-C'è un articolo sul loro sito web: [Il download degli spartiti diventa parte dell'abbonamento Pro](https://musescore.com/groups/improving-musescore-com/discuss/5044610)
-
-## Installazione
-
-### Utilizzo della CLI
-
-(consigliato)
-
-1. Installa Node.js LTS (https://nodejs.org/)
-2. Apri il terminale CMD o Powershell
-3. Digita `npx msdl`, e premi invio  
-  (`npx msdl` eseguirà sempre l'ultima versione)
-4. Seguire le istruzioni
-
-[codice sorgente](/src/cli.ts)
-
-### Installa come Userscript
-
-Questo script è disponibile come [Userscript](https://en.wikipedia.org/wiki/Userscript). Per utilizzare questo Userscript, è necessario prima installare un [gestore di script utente].(https://greasyfork.org/en/help/installing-user-scripts), come Tampermonkey.
-
-1. Installa [Tampermonkey](https://www.tampermonkey.net/)
-
-2. ~~Installa da [Greasy Fork](https://greasyfork.org/scripts/391931).~~   [#42](https://github.com/Xmader/musescore-downloader/issues/42)  
-Installa lo script da <https://msdl.librescore.org/install.user.js>
-
-### Installa come estensione web
-
-Il metodo alternativo consiste nell'installare questo script come estensione per Chrome o Firefox.
-
-Puoi installare l'estensione del browser direttamente da [addons.mozilla.org (per Firefox)](https://addons.mozilla.org/en-US/firefox/addon/musescore-downloader/) o dal [web store di Chrome (per browser basati su Chrome e Chromium)](https://chrome.google.com/webstore/detail/mhdlcdhakmmikknpefblmnhdhjloanjc).
-
-La versione aggiornata può essere trovata nella pagina [Github Releases](https://github.com/Xmader/musescore-downloader/releases).
-
-## Istruzioni per il building
-
-Assicurati di avere installato [Node.js](https://nodejs.org/en/).
-
-```bash
-npm install
-npm run build     # build come script utente
-npm run pack:ext  # pack Web Extension
-```
-
-## Mirrors
-
-* Visualizza questo progetto su [Github](https://github.com/Xmader/musescore-downloader) (Repo principale) | [Gitlab](https://gitlab.com/Xmader/musescore-downloader) (Mirror)
-
-* Questo repo è disponibile anche su IPFS per evitare la rimozione DMCA: [ipns://msdl.librescore.org](https://ipfs.io/ipns/msdl.librescore.org/)
-
-## Feedback
-
-[Problemi con GitHub](https://github.com/Xmader/musescore-downloader/issues)
-
-## Licenza
-
-MIT
-
-## Informazioni sulla richiesta di rimozione
-
-Ho ricevuto un'e-mail di [richiesta di rimozione](https://github.com/Xmader/musescore-downloader/issues/5)da uno degli sviluppatori di Musescore, ma ho qualcosa da ridire.
-
-> Non tutti i contenuti di pubblico dominio su musescore.com sono concessi in licenza dai principali editori musicali (Alfred, EMI, Sony, ecc.). State distribuendo gratuitamente contenuti musicali con licenza da Musescore.com violando i loro diritti.
-
-In primo luogo, se violi i diritti dei principali editori musicali, la richiesta di rimozione dovrebbe essere inviata da loro invece che dagli sviluppatori di Musescore.
-
-In secondo luogo, musescore.com non è un semplice sito di condivisione di musica. Gli autori di spartiti devono trascrivere e riorganizzare le canzoni originali in spartiti, non solo copiare file da qualche altra parte su musescore.com. Di conseguenza, la licenza dovrebbe concentrarsi sui diritti di trascrizione / riorganizzazione degli autori di spartiti, invece che sui diritti di condivisione della musica su alcuni siti web.
-
-In terzo luogo, la proprietà del copyright dei contenuti su musescore.com non è chiara. Non tutte le canzoni di pubblico dominio su musescore.com sono di proprietà dei principali editori musicali. Ci sono molti piccoli editori musicali e cantautori indipendenti. Le canzoni potrebbero essere concesse in licenza con licenze gratuite come Creative Commons. Inoltre, ci sono molti autori che hanno creato le proprie canzoni e pubblicato gli spartiti su musescore.com; Musescore.com paga questi autori?
-
-Se ci sono prove che musescore.com paga davvero la tassa di licenza ai proprietari del copyright, potremmo pensare che sia solo una scusa per ottenere profitto dal furto.
-
-> utilizzi illegalmente la nostra API privata con contenuti musicali con licenza.
-
-No, il documento API è su https://developers.musescore.com/.
-
-
-**Avvierò un'alternativa open source (GPLv3), serverless, offline-first, frontend-first e totalmente gratuita a musescore.com, [LibreScore](https://github.com/LibreScore). Tutti sono invitati a partecipare allo sviluppo del progetto aprendo una issue o [inviandomi un'e-mail](mailto:i@xmader.com).**
-
-**Inoltre, sto sviluppando musescore.js. Potrebbe convertire un file mscz in qualsiasi formato supportato dal software Musescore e nel browser.** Poiché il software Musescore è open source sotto [GPL](https://github.com/musescore/MuseScore/blob/master/LICENSE.GPL), potrei tradurre il codice sorgente in js o compilarlo in asm.js/WASM.
-
---
--- a/dist/main.js
+++ b/dist/main.js
--- a/install.user.js
+++ b/install.user.js
@ -1 +0,0 @@
-dist/main.js
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@ -1,9 +1,8 @@
 {
  "name": "musescore-downloader",
-  "version": "0.24.1",
+  "version": "0.10.0-rc.1",
  "description": "download sheet music from musescore.com for free, no login or Musescore Pro required | 免登录、免 Musescore Pro，免费下载 musescore.com 上的曲谱",
  "main": "dist/main.js",
-  "bin": "dist/cli.js",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/Xmader/musescore-downloader.git"
@ -16,16 +15,11 @@
  "homepage": "https://github.com/Xmader/musescore-downloader#readme",
  "homepage_url": "https://github.com/Xmader/musescore-downloader#readme",
  "manifest_version": 2,
-  "browser_specific_settings": {
-    "gecko": {
-      "id": "{69856097-6e10-42e9-acc7-0c063550c7b8}"
-    }
-  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "content_scripts": [
    {
      "matches": [
-        "*://*.musescore.com/*/*"
+        "*://musescore.com/*/*"
      ],
      "js": [
        "src/web-ext.js"
@ -37,38 +31,30 @@
    "dist/main.js"
  ],
  "dependencies": {
-    "@librescore/fonts": "^0.4.0",
-    "@librescore/sf3": "^0.3.0",
-    "detect-node": "^2.0.4",
-    "inquirer": "^7.3.3",
-    "node-fetch": "^2.6.1",
-    "ora": "^5.1.0",
-    "webmscore": "^0.18.0"
+    "pdfkit": "git+https://github.com/Xmader/pdfkit.git",
+    "svg-to-pdfkit": "^0.1.8",
+    "webmscore": "^0.10.4"
  },
  "devDependencies": {
-    "@rollup/plugin-json": "^4.1.0",
+    "@rollup/plugin-json": "^4.0.0",
    "@types/file-saver": "^2.0.1",
-    "@types/inquirer": "^7.3.1",
-    "@types/pdfkit": "^0.10.6",
-    "pdfkit": "git+https://github.com/Xmader/pdfkit.git",
-    "rollup": "^1.32.1",
+    "@types/pdfkit": "^0.10.4",
+    "rollup": "^1.26.3",
    "rollup-plugin-commonjs": "^10.1.0",
    "rollup-plugin-node-builtins": "^2.1.2",
    "rollup-plugin-node-globals": "^1.4.0",
    "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-string": "^3.0.0",
    "rollup-plugin-typescript": "^1.0.1",
-    "svg-to-pdfkit": "^0.1.8",
-    "tslib": "^1.14.1",
-    "typescript": "^4.1.2"
+    "tslib": "^1.10.0",
+    "typescript": "^3.9.7"
  },
  "scripts": {
    "build": "rollup -c",
    "watch": "npm run build -- --watch",
-    "start:ext": "web-ext run --url https://musescore.com/",
+    "start:ext": "web-ext run",
    "start:ext-chrome": "npm run start:ext -- -t chromium",
    "pack:ext": "zip -r dist/ext.zip manifest.json src/web-ext.js dist/main.js",
-    "bump-version:patch": "npm version patch --no-git-tag && npm run build",
-    "bump-version:minor": "npm version minor --no-git-tag && npm run build"
+    "bump-version:patch": "npm version patch --no-git-tag",
+    "bump-version:minor": "npm version minor --no-git-tag"
  }
 }
--- a/rollup.config.js
+++ b/rollup.config.js
@ -4,7 +4,6 @@ import commonjs from "rollup-plugin-commonjs"
 import builtins from "rollup-plugin-node-builtins"
 import nodeGlobals from "rollup-plugin-node-globals"
 import json from "@rollup/plugin-json"
-import { string } from "rollup-plugin-string"
 import fs from "fs"

 const getBannerText = () => {
@ -15,12 +14,7 @@ const getBannerText = () => {
    return bannerText
 }

-const getWrapper = (startL, endL) => {
-    const js = fs.readFileSync("./src/wrapper.js", "utf-8")
-    return js.split(/\n/g).slice(startL, endL).join("\n")
-}
-
-const basePlugins = [
+const plugins = [
    typescript({
        target: "ES6",
        sourceMap: false,
@ -39,8 +33,11 @@ const basePlugins = [
        extensions: [".js", ".ts"]
    }),
    json(),
-    string({
-        include: "**/*.css",
+    builtins(),
+    nodeGlobals({
+        dirname: false,
+        filename: false,
+        baseDir: false,
    }),
    {
        /**
@ -59,16 +56,6 @@ const basePlugins = [
    },
 ]

-const plugins = [
-    ...basePlugins,
-    builtins(),
-    nodeGlobals({
-        dirname: false,
-        filename: false,
-        baseDir: false,
-    }),
-]
-
 export default [
    {
        input: "src/worker.ts",
@ -88,19 +75,9 @@ export default [
            format: "iife",
            sourcemap: false,
            banner: getBannerText,
-            intro: () => getWrapper(0, -1),
-            outro: () => getWrapper(-1)
+            intro: "// fix for Greasemonkey\nwindow.eval('(' + function () {",
+            outro: "}.toString() + ')()')"
        },
        plugins,
    },
-    {
-        input: "src/cli.ts",
-        output: {
-            file: "dist/cli.js",
-            format: "cjs",
-            banner: "#!/usr/bin/env node",
-            sourcemap: false,
-        },
-        plugins: basePlugins,
-    },
 ]
--- a/src/anti-detection.ts
+++ b/src/anti-detection.ts
@ -1,53 +0,0 @@
-/* eslint-disable no-extend-native */
-/* eslint-disable @typescript-eslint/ban-types */
-
-/**
- * make hooked methods "native"
- */
-export const makeNative = (() => {
-  const l = new Map<Function, Function>()
-
-  hookNative(Function.prototype, 'toString', (_toString) => {
-    return function () {
-      if (l.has(this)) {
-        const _fn = l.get(this) || parseInt // "function () {\n    [native code]\n}"
-        if (l.has(_fn)) { // nested
-          return _fn.toString()
-        } else {
-          return _toString.call(_fn) as string
-        }
-      }
-      return _toString.call(this) as string
-    }
-  }, true)
-
-  return (fn: Function, original: Function) => {
-    l.set(fn, original)
-  }
-})()
-
-export function hookNative<T extends object, M extends (keyof T)> (
-  target: T,
-  method: M,
-  hook: (originalFn: T[M], detach: () => void) => T[M],
-  async = false,
-): void {
-  // reserve for future hook update
-  const _fn = target[method]
-  const detach = () => {
-    target[method] = _fn // detach
-  }
-
-  // This script can run before anything on the page,  
-  // so setting this function to be non-configurable and non-writable is no use.
-  const hookedFn = hook(_fn, detach)
-  target[method] = hookedFn
-
-  if (!async) {
-    makeNative(hookedFn as any, _fn as any)
-  } else {
-    setTimeout(() => {
-      makeNative(hookedFn as any, _fn as any)
-    })
-  }
-}
--- a/src/btn.css
+++ b/src/btn.css
@ -1,83 +0,0 @@
-div {
-  width: 422px;
-  right: 0;
-  margin: 0 18px 18px 0;
-
-  text-align: center;
-  align-items: center;
-  font-family: 'Inter', 'Helvetica neue', Helvetica, sans-serif;
-  position: absolute;
-  z-index: 9999;
-  background: #f6f6f6;
-  min-width: 230px;
-
-  /* pass the scroll event through the btns background */
-  pointer-events: none;
-}
-
-@media screen and (max-width: 950px) {
-  div {
-    width: auto !important;
-  }
-}
-
-button {
-  width: 178px !important;
-  min-width: 178px;
-  height: 40px;
-
-  color: #fff;
-  background: #2e68c0;
-
-  cursor: pointer;
-  pointer-events: auto;
-
-  margin-bottom: 8px;
-  margin-right: 8px;
-  padding: 4px 12px;
-
-  justify-content: start;
-  align-self: center;
-
-  font-size: 16px;
-  border-radius: 6px;
-  border: 0;
-
-  display: inline-flex;
-  position: relative;
-
-  font-family: inherit;
-}
-
-/* fix `View in LibreScore` button text overflow */
-button:last-of-type {
-  width: unset !important;
-}
-
-button:hover {
-  background: #1a4f9f;
-}
-
-/* light theme btn */
-button.light {
-  color: #2e68c0;
-  background: #e1effe;
-}
-
-button.light:hover {
-  background: #c3ddfd;
-}
-
-svg {
-  display: inline-block;
-  margin-right: 5px;
-  width: 20px;
-  height: 20px;
-  margin-top: auto;
-  margin-bottom: auto;
-}
-
-span {
-  margin-top: auto;
-  margin-bottom: auto;
-}
--- a/src/btn.ts
+++ b/src/btn.ts
@ -1,216 +1,90 @@

-import { ScoreInfo } from './scoreinfo'
 import { loadMscore, WebMscore } from './mscore'
-import { useTimeout, windowOpenAsync, console, attachShadow, DISCORD_URL } from './utils'
-import { isGmAvailable, _GM } from './gm'
-import i18n from './i18n'
-// @ts-ignore
-import btnListCss from './btn.css'

 type BtnElement = HTMLButtonElement

-export enum ICON {
-  DOWNLOAD = 'M9.6 2.4h4.8V12h2.784l-5.18 5.18L6.823 12H9.6V2.4zM19.2 19.2H4.8v2.4h14.4v-2.4z',
-  LIBRESCORE = 'm5.4837 4.4735v10.405c-1.25-0.89936-3.0285-0.40896-4.1658 0.45816-1.0052 0.76659-1.7881 2.3316-0.98365 3.4943 1 1.1346 2.7702 0.70402 3.8817-0.02809 1.0896-0.66323 1.9667-1.8569 1.8125-3.1814v-5.4822h8.3278v9.3865h9.6438v-2.6282h-6.4567v-12.417c-4.0064-0.015181-8.0424-0.0027-12.06-0.00676zm0.54477 2.2697h8.3278v1.1258h-8.3278v-1.1258z',
+/**
+ * Select the original Download Button
+ */
+export const getDownloadBtn = (): BtnElement => {
+  const btnsDiv = document.querySelector('.score-right .buttons-wrapper') || document.querySelectorAll('aside > section > section > div')[3]
+  const btn = btnsDiv.querySelector('button, .button') as BtnElement
+  btn.onclick = null
+
+  // fix the icon of the download btn
+  // if the `btn` seleted was a `Print` btn, replace the `print` icon with the `download` icon
+  const svgPath: SVGPathElement | null = btn.querySelector('svg > path')
+  if (svgPath) {
+    svgPath.setAttribute('d', 'M9.6 2.4h4.8V12h2.784l-5.18 5.18L6.823 12H9.6V2.4zM19.2 19.2H4.8v2.4h14.4v-2.4z')
  }

-const getBtnContainer = (): HTMLDivElement => {
-  const els = [...document.querySelectorAll('span')]
-  const el = els.find(b => {
-    const text = b?.textContent?.replace(/\s/g, '') || ''
-    return text.includes('Download') || text.includes('Print')
-  }) as HTMLDivElement | null
-  const btnParent = el?.parentElement?.parentElement as HTMLDivElement | undefined
-  if (!btnParent || !(btnParent instanceof HTMLDivElement)) throw new Error('btn parent not found')
-  return btnParent
+  if (btn.nodeName.toLowerCase() === 'button') {
+    btn.setAttribute('style', 'width: 205px !important')
+  } else {
+    btn.dataset.target = ''
  }

-const buildDownloadBtn = (icon: ICON, lightTheme = false) => {
-  const btn = document.createElement('button')
-  btn.type = 'button'
-  if (lightTheme) btn.className = 'light'
-
-  // build icon svg element
-  const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg')
-  svg.setAttribute('viewBox', '0 0 24 24')
-  const svgPath = document.createElementNS('http://www.w3.org/2000/svg', 'path')
-  svgPath.setAttribute('d', icon)
-  svgPath.setAttribute('fill', lightTheme ? '#2e68c0' : '#fff')
-  svg.append(svgPath)
-
-  const textNode = document.createElement('span')
-  btn.append(svg, textNode)
-
  return btn
 }

-const cloneBtn = (btn: HTMLButtonElement) => {
-  const n = btn.cloneNode(true) as HTMLButtonElement
-  n.onclick = btn.onclick
-  return n
-}
-
-function getScrollParent (node: HTMLElement): HTMLElement {
-  if (node.scrollHeight > node.clientHeight) {
-    return node
-  } else {
-    return getScrollParent(node.parentNode as HTMLElement)
-  }
-}
-
-function onPageRendered (getEl: () => HTMLElement) {
-  return new Promise<HTMLElement>((resolve) => {
-    const observer = new MutationObserver(() => {
-      try {
-        const el = getEl()
-        if (el) {
-          observer.disconnect()
-          resolve(el)
-        }
-      } catch { }
-    })
-    observer.observe(document.querySelector('div > section') ?? document.body, { childList: true, subtree: true })
-  })
-}
-
 interface BtnOptions {
  readonly name: string;
  readonly action: BtnAction;
  readonly disabled?: boolean;
  readonly tooltip?: string;
-  readonly icon?: ICON;
-  readonly lightTheme?: boolean;
-}
-
-export enum BtnListMode {
-  InPage,
-  ExtWindow,
 }

 export class BtnList {
  private readonly list: BtnElement[] = [];

-  constructor (private getBtnParent: () => HTMLDivElement = getBtnContainer) { }
+  constructor (private templateBtn: BtnElement) { }

  add (options: BtnOptions): BtnElement {
-    const btnTpl = buildDownloadBtn(options.icon ?? ICON.DOWNLOAD, options.lightTheme)
-    const setText = (btn: BtnElement) => {
-      const textNode = btn.querySelector('span')
-      return (str: string): void => {
-        if (textNode) textNode.textContent = str
-      }
+    const btn = this.templateBtn.cloneNode(true) as HTMLButtonElement
+
+    const textNode = [...btn.childNodes].find((x) => {
+      const txt = x.textContent as string
+      return txt.includes('Download') || txt.includes('Print')
+    }) as HTMLSpanElement
+
+    // Anti-detection:
+    // musescore will send a track event "MSCZDOWNLOADER_INSTALLED" to its backend 
+    //    if detected "Download MSCZ"
+    const _property = 'textContent'
+    const _set = textNode['__lookupSetter__'](_property)
+    Object.defineProperty(textNode, _property, {
+      set (v) { _set.call(textNode, v) },
+      get () { return 'Download' },
+    })
+
+    const setText = (str: string): void => {
+      textNode.textContent = str
    }

-    setText(btnTpl)(options.name)
+    setText(options.name)

-    btnTpl.onclick = function () {
-      const btn = this as BtnElement
-      options.action(options.name, btn, setText(btn))
+    btn.onclick = (): void => {
+      options.action(options.name, btn, setText)
    }

-    this.list.push(btnTpl)
+    this.list.push(btn)

    if (options.disabled) {
-      btnTpl.disabled = options.disabled
+      btn.disabled = options.disabled
    }

    if (options.tooltip) {
-      btnTpl.title = options.tooltip
+      btn.title = options.tooltip
    }

-    // add buttons to the userscript manager menu
-    if (isGmAvailable('registerMenuCommand')) {
-      // eslint-disable-next-line no-void
-      void _GM.registerMenuCommand(options.name, () => {
-        options.action(options.name, btnTpl, () => undefined)
-      })
-    }
-
-    return btnTpl
-  }
-
-  private _positionBtns (anchorDiv: HTMLDivElement, newParent: HTMLDivElement) {
-    let { top } = anchorDiv.getBoundingClientRect()
-    top += window.scrollY // relative to the entire document instead of viewport
-    if (top > 0) {
-      newParent.style.top = `${top}px`
-    } else {
-      newParent.style.top = '0px'
-    }
-  }
-
-  private _commit () {
-    const btnParent = document.querySelector('div') as HTMLDivElement
-    const shadow = attachShadow(btnParent)
-
-    // style the shadow DOM
-    const style = document.createElement('style')
-    style.innerText = btnListCss
-    shadow.append(style)
-
-    // hide buttons using the shadow DOM
-    const slot = document.createElement('slot')
-    shadow.append(slot)
-
-    const newParent = document.createElement('div')
-    newParent.append(...this.list.map(e => cloneBtn(e)))
-    shadow.append(newParent)
-
-    // default position
-    newParent.style.top = `${window.innerHeight - newParent.getBoundingClientRect().height}px`
-
-    void onPageRendered(this.getBtnParent).then((anchorDiv: HTMLDivElement) => {
-      const pos = () => this._positionBtns(anchorDiv, newParent)
-      pos()
-
-      // reposition btns when window resizes
-      window.addEventListener('resize', pos, { passive: true })
-
-      // reposition btns when scrolling
-      const scroll = getScrollParent(anchorDiv)
-      scroll.addEventListener('scroll', pos, { passive: true })
-    })
-
-    return btnParent
+    return btn
  }

  /**
   * replace the template button with the list of new buttons
   */
-  async commit (mode: BtnListMode = BtnListMode.InPage): Promise<void> {
-    switch (mode) {
-      case BtnListMode.InPage: {
-        let el: Element
-        try {
-          el = this._commit()
-        } catch {
-          // fallback to BtnListMode.ExtWindow
-          return this.commit(BtnListMode.ExtWindow)
-        }
-        const observer = new MutationObserver(() => {
-          // check if the buttons are still in document when dom updates 
-          if (!document.contains(el)) {
-            // re-commit
-            // performance issue?
-            el = this._commit()
-          }
-        })
-        observer.observe(document, { childList: true, subtree: true })
-        break
-      }
-
-      case BtnListMode.ExtWindow: {
-        const div = this._commit()
-        const w = await windowOpenAsync(undefined, '', undefined, 'resizable,width=230,height=270')
-        // eslint-disable-next-line no-unused-expressions
-        w?.document.body.append(div)
-        window.addEventListener('unload', () => w?.close())
-        break
-      }
-
-      default:
-        throw new Error('unknown BtnListMode')
-    }
+  commit (): void {
+    this.templateBtn.replaceWith(...this.list)
  }
 }

@ -219,6 +93,13 @@ type BtnAction = (btnName: string, btnEl: BtnElement, setText: (str: string) =>
 // eslint-disable-next-line @typescript-eslint/no-namespace
 export namespace BtnAction {

+  export const PROCESSING_TEXT = 'Processing…'
+  export const ERROR_TEXT = '❌Download Failed!'
+
+  const deprecationNotice = (btnName: string): string => {
+    return `DEPRECATED!\nUse \`${btnName}\` inside \`Individual Parts\` instead.\n(This may still work. Click \`OK\` to continue.)`
+  }
+
  type Promisable<T> = T | Promise<T>
  type UrlInput = Promisable<string> | (() => Promisable<string>)

@ -227,26 +108,29 @@ export namespace BtnAction {
    else return url
  }

-  export const download = (url: UrlInput, fallback?: () => Promisable<void>, timeout?: number, target?: '_blank'): BtnAction => {
-    return process(async (): Promise<void> => {
+  export const openUrl = (url: UrlInput): BtnAction => {
+    return process(async (): Promise<any> => {
+      window.open(await normalizeUrlInput(url))
+    })
+  }
+
+  export const download = (url: UrlInput): BtnAction => {
+    return process(async (): Promise<any> => {
      const _url = await normalizeUrlInput(url)
      const a = document.createElement('a')
      a.href = _url
-      if (target) a.target = target
      a.dispatchEvent(new MouseEvent('click'))
-    }, fallback, timeout)
+    })
  }

-  export const openUrl = download
-
-  export const mscoreWindow = (scoreinfo: ScoreInfo, fn: (w: Window, score: WebMscore, processingTextEl: ChildNode) => any): BtnAction => {
+  export const mscoreWindow = (fn: (w: Window, score: WebMscore, processingTextEl: ChildNode) => any): BtnAction => {
    return async (btnName, btn, setText) => {
      const _onclick = btn.onclick
      btn.onclick = null
-      setText(i18n('PROCESSING')())
+      setText(BtnAction.PROCESSING_TEXT)

-      const w = await windowOpenAsync(btn, '') as Window
-      const txt = document.createTextNode(i18n('PROCESSING')())
+      const w = window.open('') as Window
+      const txt = document.createTextNode(BtnAction.PROCESSING_TEXT)
      w.document.body.append(txt)

      // set page hooks
@ -264,42 +148,25 @@ export namespace BtnAction {
        btn.onclick = _onclick
      })

-      score = await loadMscore(scoreinfo, w)
+      score = await loadMscore(w)

      fn(w, score, txt)
    }
  }

-  export const process = (fn: () => any, fallback?: () => Promisable<void>, timeout = 10 * 60 * 1000 /* 10min */): BtnAction => {
+  export const process = (fn: () => any): BtnAction => {
    return async (name, btn, setText): Promise<void> => {
      const _onclick = btn.onclick

      btn.onclick = null
-      setText(i18n('PROCESSING')())
+      setText(PROCESSING_TEXT)

      try {
-        await useTimeout(fn(), timeout)
+        await fn()
        setText(name)
      } catch (err) {
+        setText(ERROR_TEXT)
        console.error(err)
-        if (fallback) {
-          // use fallback
-          await fallback()
-          setText(name)
-        } else {
-          setText(i18n('BTN_ERROR')())
-          // ask user to send Discord message
-          alert(
-            '❌Download Failed!\n\n' +
-            'Send your URL to the #dataset-bugs channel ' +
-            'in the LibreScore Community Discord server:\n' + DISCORD_URL,
-          )
-          // open Discord on 'OK'
-          const a = document.createElement('a')
-          a.href = DISCORD_URL
-          a.target = '_blank'
-          a.dispatchEvent(new MouseEvent('click'))
-        }
      }

      btn.onclick = _onclick
@ -308,7 +175,7 @@ export namespace BtnAction {

  export const deprecate = (action: BtnAction): BtnAction => {
    return (name, btn, setText) => {
-      alert(i18n('DEPRECATION_NOTICE')(name))
+      alert(deprecationNotice(name))
      // eslint-disable-next-line @typescript-eslint/no-unsafe-return
      return action(name, btn, setText)
    }
--- a/src/cli.ts
+++ b/src/cli.ts
@ -1,206 +0,0 @@
-
-/* eslint-disable @typescript-eslint/no-var-requires */
-/* eslint-disable no-void */
-
-import fs from 'fs'
-import path from 'path'
-import os from 'os'
-import { fetchMscz, setMscz, MSCZ_URL_SYM } from './mscz'
-import { loadMscore, INDV_DOWNLOADS, WebMscore } from './mscore'
-import { ScoreInfo, ScoreInfoHtml, ScoreInfoObj, getActualId } from './scoreinfo'
-import { getLibreScoreLink } from './librescore-link'
-import { escapeFilename, DISCORD_URL } from './utils'
-import { isNpx, getVerInfo, getSelfVer } from './npm-data'
-import i18n from './i18n'
-
-const inquirer: typeof import('inquirer') = require('inquirer')
-const ora: typeof import('ora') = require('ora')
-const chalk: typeof import('chalk') = require('chalk')
-
-const SCORE_URL_PREFIX = 'https://(s.)musescore.com/'
-const SCORE_URL_REG = /https:\/\/(s\.)?musescore\.com\//
-const EXT = '.mscz'
-
-interface Params {
-  fileInit: string;
-  confirmed: boolean;
-  part: number;
-  types: number[];
-  dest: string;
-}
-
-void (async () => {
-  const arg = process.argv[2]
-  if (['-v', '--version'].includes(arg)) { // ran with flag -v or --version, `msdl -v`
-    console.log(getSelfVer()) // print musescore-downloader version
-    return // exit process
-  }
-
-  // Determine platform and paste message
-  const platform = os.platform()
-  let pasteMessage = ''
-  if (platform === 'win32') {
-    pasteMessage = 'right-click to paste'
-  } else if (platform === 'linux') {
-    pasteMessage = 'usually Ctrl+Shift+V to paste'
-  } // For MacOS, no hint is needed because the paste shortcut is universal.
-
-  let scoreinfo: ScoreInfo
-  let librescoreLink: Promise<string> | undefined
-  // ask for the page url or path to local file
-  const { fileInit } = await inquirer.prompt<Params>({
-    type: 'input',
-    name: 'fileInit',
-    message: 'Score URL or path to local MSCZ file:',
-    suffix: '\n  ' +
-      `(starts with "${SCORE_URL_PREFIX}" or local filepath ends with "${EXT}") ` +
-      `${chalk.bgGray(pasteMessage)}\n `,
-    validate (input: string) {
-      return input &&
-        (
-          !!input.match(SCORE_URL_REG) ||
-          (input.endsWith(EXT) && fs.statSync(input).isFile())
-        )
-    },
-    default: arg,
-  })
-
-  const isLocalFile = fileInit.endsWith(EXT)
-  if (!isLocalFile) {
-    // request scoreinfo
-    scoreinfo = await ScoreInfoHtml.request(fileInit)
-    try {
-      await getActualId(scoreinfo as any)
-    } catch (err) {
-      console.error(err)
-    }
-
-    // confirmation
-    const { confirmed } = await inquirer.prompt<Params>({
-      type: 'confirm',
-      name: 'confirmed',
-      message: 'Continue?',
-      prefix: `${chalk.yellow('!')} ` +
-        `ID: ${scoreinfo.id}\n  ` +
-        `Title: ${scoreinfo.title}\n `,
-      default: true,
-    })
-    if (!confirmed) return
-
-    // initiate LibreScore link request
-    librescoreLink = getLibreScoreLink(scoreinfo)
-    librescoreLink.catch(() => '') // silence this unhandled Promise rejection
-
-    // print a blank line to the terminal
-    console.log()
-  } else {
-    scoreinfo = new ScoreInfoObj(0, path.basename(fileInit, EXT))
-  }
-
-  const spinner = ora({
-    text: i18n('PROCESSING')(),
-    color: 'blue',
-    spinner: 'bounce',
-    indent: 0,
-  }).start()
-
-  let score: WebMscore
-  let metadata: import('webmscore/schemas').ScoreMetadata
-  try {
-    if (!isLocalFile) {
-      // fetch mscz file from the dataset, and cache it for side effect
-      await fetchMscz(scoreinfo)
-    } else {
-      // load local file
-      const data = await fs.promises.readFile(fileInit)
-      await setMscz(scoreinfo, data.buffer)
-    }
-
-    spinner.info('MSCZ file loaded')
-    if (!isLocalFile) {
-      spinner.info(`File URL: ${scoreinfo.store.get(MSCZ_URL_SYM) as string}`)
-    }
-    if (librescoreLink) {
-      try {
-        spinner.info(`${i18n('VIEW_IN_LIBRESCORE')()}: ${await librescoreLink}`)
-      } catch { } // it doesn't affect the main feature
-    }
-    spinner.start()
-
-    // load score using webmscore
-    score = await loadMscore(scoreinfo)
-    metadata = await score.metadata()
-
-    spinner.info('Score loaded by webmscore')
-  } catch (err) {
-    spinner.fail(err.message)
-    spinner.info(
-      'Send your URL to the #dataset-bugs channel in the LibreScore Community Discord server:\n  ' +
-      DISCORD_URL,
-    )
-    return
-  }
-  spinner.succeed('OK\n')
-
-  // build part choices
-  const partChoices = metadata.excerpts.map(p => ({ name: p.title, value: p.id }))
-  // add the "full score" option as a "part" 
-  partChoices.unshift({ value: -1, name: i18n('FULL_SCORE')() })
-  // build filetype choices
-  const typeChoices = INDV_DOWNLOADS.map((d, i) => ({ name: d.name, value: i }))
-
-  // part selection
-  const { part } = await inquirer.prompt<Params>({
-    type: 'list',
-    name: 'part',
-    message: 'Part Selection',
-    choices: partChoices,
-  })
-  const partName = partChoices[part + 1].name
-  await score.setExcerptId(part)
-
-  // filetype selection
-  const { types } = await inquirer.prompt<Params>({
-    type: 'checkbox',
-    name: 'types',
-    message: 'Filetype Selection',
-    choices: typeChoices,
-    validate (input: number[]) {
-      return input.length >= 1
-    },
-  })
-  const filetypes = types.map(i => INDV_DOWNLOADS[i])
-
-  // destination directory
-  const { dest } = await inquirer.prompt<Params>({
-    type: 'input',
-    name: 'dest',
-    message: 'Destination Directory:',
-    validate (input: string) {
-      return input && fs.statSync(input).isDirectory()
-    },
-    default: process.cwd(),
-  })
-
-  // export files
-  const fileName = scoreinfo.fileName || await score.titleFilenameSafe()
-  spinner.start()
-  await Promise.all(
-    filetypes.map(async (d) => {
-      const data = await d.action(score)
-      const n = `${fileName} - ${escapeFilename(partName)}.${d.fileExt}`
-      const f = path.join(dest, n)
-      await fs.promises.writeFile(f, data)
-      spinner.info(`Saved ${chalk.underline(f)}`)
-      spinner.start()
-    }),
-  )
-  spinner.succeed('OK')
-
-  if (!isNpx()) {
-    const { installed, latest, isLatest } = await getVerInfo()
-    if (!isLatest) {
-      console.log(chalk.yellowBright(`\nYour installed version (${installed}) of the musescore-downloader CLI is not the latest one (${latest})!\nRun npm i -g musescore-downloader@${latest} to update.`))
-    }
-  }
-})()
--- a/src/file.ts
+++ b/src/file.ts
@ -1,115 +1,64 @@
 /* eslint-disable no-extend-native */
-/* eslint-disable @typescript-eslint/no-unsafe-return */

-import { hookNative } from './anti-detection'
-import { console } from './utils'
+import scoreinfo from './scoreinfo'
+import { webpackHook } from './webpack-hook'
+
+const FILE_URL_MODULE_ID = 'iNJA'
+const MAGIC_REG = /^\d+(img|mp3|midi)\d(.+)$/

 type FileType = 'img' | 'mp3' | 'midi'

-const TYPE_REG = /type=(img|mp3|midi)/
+const getApiUrl = (id: number, type: FileType, index: number): string => {
+  // proxy
+  return `https://musescore.now.sh/api/jmuse?id=${id}&type=${type}&index=${index}`
+}

 /**
 * I know this is super hacky.
 */
-const magicHookConstr = (() => {
-  const l = {}
+let magic: Promise<string> | string = new Promise((resolve) => {
+  // reserve for future hook update
+  const target = String.prototype
+  const method = 'charCodeAt'
+  const _fn = target[method]

-  try {
-    const p = Object.getPrototypeOf(document.body)
-    Object.setPrototypeOf(document.body, null)
-
-    hookNative(document.body, 'append', () => {
-      return function (...nodes: Node[]) {
-        p.append.call(this, ...nodes)
-
-        if (nodes[0].nodeName === 'IFRAME') {
-          const iframe = nodes[0] as HTMLIFrameElement
-          const w = iframe.contentWindow as Window
-
-          hookNative(w, 'fetch', () => {
-            return function (url, init) {
-              const token = init?.headers?.Authorization
-              if (typeof url === 'string' && token) {
-                const m = url.match(TYPE_REG)
-                console.debug(url, token, m)
+  // This script can run before anything on the page,  
+  // so setting this function to be non-configurable and non-writable is no use.
+  target[method] = function (i) {
+    const m = this.match(MAGIC_REG)
    if (m) {
-                  const type = m[1]
-                  // eslint-disable-next-line no-unused-expressions
-                  l[type]?.(token)
-                }
-              }
-              return fetch(url, init)
-            }
-          })
+      resolve(m[2])
+      magic = m[2]
+      target[method] = _fn // detach
    }
+    return _fn.call(this, i) as number
  }
 })

-    Object.setPrototypeOf(document.body, p)
-  } catch (err) {
-    console.error(err)
-  }
-
-  return async (type: FileType) => {
-    return new Promise<string>((resolve) => {
-      l[type] = (token) => {
-        resolve(token)
-        magics[type] = token
-      }
+export const getFileUrl = async (type: FileType, index = 0): Promise<string> => {
+  const fileUrlModule = webpackHook(FILE_URL_MODULE_ID, {
+    '6Ulw' (_, r, t) { // override
+      t.d(r, 'a', () => {
+        return type
+      })
+    },
+    'VSrV' (_, r, t) { // override
+      t.d(r, 'b', () => {
+        return getApiUrl
      })
-  }
-})()
-
-const magics: Record<FileType, Promise<string>> = {
-  img: magicHookConstr('img'),
-  midi: magicHookConstr('midi'),
-  mp3: magicHookConstr('mp3'),
-}
-
-const getApiUrl = (id: number, type: FileType, index: number): string => {
-  return `/api/jmuse?id=${id}&type=${type}&index=${index}&v2=1`
-}
-
-const getApiAuth = async (type: FileType, index: number): Promise<string> => {
-  // eslint-disable-next-line no-void
-  void index
-
-  const magic = magics[type]
-  if (magic instanceof Promise) {
-    // force to retrieve the MAGIC
-    switch (type) {
-      case 'midi': {
-        const el = document.querySelector('button[hasaccess]') as HTMLButtonElement
-        el.click()
-        break
-      }
-      case 'mp3': {
-        const el = document.querySelector('button[title="Toggle Play"]') as HTMLButtonElement
-        el.click()
-        break
-      }
-      case 'img': {
-        const imgE = document.querySelector('img[src*=score_]')
-        const nextE = imgE?.parentElement?.nextElementSibling
-        if (nextE) nextE.scrollIntoView()
-        break
-      }
-    }
-  }
-
-  return magic
-}
-
-export const getFileUrl = async (id: number, type: FileType, index = 0): Promise<string> => {
-  const url = getApiUrl(id, type, index)
-  const auth = await getApiAuth(type, index)
-
-  const r = await fetch(url, {
-    headers: {
-      Authorization: auth,
    },
  })

-  const { info } = await r.json()
-  return info.url as string
+  const fn: (id: number, index: number, cb: (url: string) => any, magic: string) => string = fileUrlModule.a
+
+  if (typeof magic !== 'string') {
+    // force to retrieve the MAGIC
+    const el = document.querySelectorAll('.SD7H- > button')[3] as HTMLButtonElement
+    el.click()
+    magic = await magic
+  }
+
+  return new Promise((resolve) => {
+    return fn(scoreinfo.id, index, resolve, magic as string)
+  })
 }
--- a/src/gm.ts
+++ b/src/gm.ts
@ -1,22 +0,0 @@
-
-/**
- * UserScript APIs
- */
-declare const GM: {
-  /** https://www.tampermonkey.net/documentation.php#GM_info */
-  info: Record<string, any>;
-
-  /** https://www.tampermonkey.net/documentation.php#GM_registerMenuCommand */
-  registerMenuCommand (name: string, fn: () => any, accessKey?: string): Promise<number>;
-
-  /** https://github.com/Tampermonkey/tampermonkey/issues/881#issuecomment-639705679 */
-  addElement<K extends keyof HTMLElementTagNameMap> (tagName: K, properties: Record<string, any>): Promise<HTMLElementTagNameMap[K]>;
-}
-export const _GM = (typeof GM === 'object' ? GM : undefined) as GM
-
-type GM = typeof GM
-
-export const isGmAvailable = (requiredMethod: keyof GM = 'info'): boolean => {
-  return typeof GM !== 'undefined' &&
-    typeof GM[requiredMethod] !== 'undefined'
-}
--- a/src/i18n/en.ts
+++ b/src/i18n/en.ts
@ -1,37 +0,0 @@
-
-import { createLocale } from './utils'
-
-export default createLocale({
-  'PROCESSING' () {
-    return 'Processing…' as const
-  },
-  'BTN_ERROR' () {
-    return '❌Download Failed!' as const
-  },
-
-  'DEPRECATION_NOTICE' (btnName: string) {
-    return `DEPRECATED!\nUse \`${btnName}\` inside \`Individual Parts\` instead.\n(This may still work. Click \`OK\` to continue.)` as const
-  },
-
-  'DOWNLOAD' <T extends string> (fileType: T) {
-    return `Download ${fileType}` as const
-  },
-  'DOWNLOAD_AUDIO' <T extends string> (fileType: T) {
-    return `Download ${fileType} Audio` as const
-  },
-
-  'IND_PARTS' () {
-    return 'Individual Parts' as const
-  },
-  'IND_PARTS_TOOLTIP' () {
-    return 'Download individual parts (BETA)' as const
-  },
-
-  'VIEW_IN_LIBRESCORE' () {
-    return 'View in LibreScore' as const
-  },
-
-  'FULL_SCORE' () {
-    return 'Full score' as const
-  },
-})
--- a/src/i18n/es.ts
+++ b/src/i18n/es.ts
@ -1,37 +0,0 @@
-
-import { createLocale } from './utils'
-
-export default createLocale({
-  'PROCESSING' () {
-    return 'Cargando…' as const
-  },
-  'BTN_ERROR' () {
-    return '❌¡Descarga Fallida!' as const
-  },
-
-  'DEPRECATION_NOTICE' (btnName: string) {
-    return `¡OBSOLETO!\nUtilizar \`${btnName}\` dentro de \`Partes Indivduales\` en su lugar.\n(Esto todavía puede funcionar. Pulsa \`Aceptar\` para continuar.)` as const
-  },
-
-  'DOWNLOAD' <T extends string> (fileType: T) {
-    return `Descargar ${fileType}` as const
-  },
-  'DOWNLOAD_AUDIO' <T extends string> (fileType: T) {
-    return `Descargar Audio ${fileType}` as const
-  },
-
-  'IND_PARTS' () {
-    return 'Partes individuales' as const
-  },
-  'IND_PARTS_TOOLTIP' () {
-    return 'Descargar partes individuales (BETA)' as const
-  },
-
-  'VIEW_IN_LIBRESCORE' () {
-    return 'Visualizar en LibreScore' as const
-  },
-
-  'FULL_SCORE' () {
-    return 'Partitura Completa' as const
-  },
-})
--- a/src/i18n/index.ts
+++ b/src/i18n/index.ts
@ -1,60 +0,0 @@
-
-import isNodeJs from 'detect-node'
-
-import en from './en'
-import es from './es'
-import it from './it'
-import zh from './zh'
-
-export interface LOCALE {
-  'PROCESSING' (): string;
-  'BTN_ERROR' (): string;
-
-  'DEPRECATION_NOTICE' (btnName: string): string;
-
-  'DOWNLOAD' (fileType: string): string;
-  'DOWNLOAD_AUDIO' (fileType: string): string;
-
-  'IND_PARTS' (): string;
-  'IND_PARTS_TOOLTIP' (): string;
-
-  'VIEW_IN_LIBRESCORE' (): string;
-
-  'FULL_SCORE' (): string;
-}
-
-const locales = (<L extends { [n: string]: LOCALE } /** type checking */> (l: L) => Object.freeze(l))({
-  en,
-  es,
-  it,
-  zh,
-})
-
-// detect browser language
-const lang = (() => {
-  let userLangs: readonly string[]
-  if (!isNodeJs) {
-    userLangs = navigator.languages
-  } else {
-    const env = process.env
-    const l = env.LC_ALL || env.LC_MESSAGES || env.LANG || env.LANGUAGE || ''
-    userLangs = [l.slice(0, 2)]
-  }
-
-  const names = Object.keys(locales)
-  const _lang = userLangs.find(l => {
-    // find the first occurrence of valid languages
-    return names.includes(l)
-  })
-  return _lang || 'en'
-})()
-
-export type STR_KEYS = keyof LOCALE
-export type ALL_LOCALES = typeof locales
-export type LANGS = keyof ALL_LOCALES
-
-// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
-export default function i18n<K extends STR_KEYS, L extends LANGS = 'en'> (key: K) {
-  const locale = locales[lang] as ALL_LOCALES[L]
-  return locale[key]
-}
--- a/src/i18n/it.ts
+++ b/src/i18n/it.ts
@ -1,37 +0,0 @@
-
-import { createLocale } from './utils'
-
-export default createLocale({
-  'PROCESSING' () {
-    return 'Caricamento…' as const
-  },
-  'BTN_ERROR' () {
-    return '❌Download Fallito!' as const
-  },
-
-  'DEPRECATION_NOTICE' (btnName: string) {
-    return `¡DEPRECATO!\nUtilizzare \`${btnName}\` all'interno di \`Parti Indivduali\`.\n(Qusto potrebbe funzionare. Cliccare \`Ok\` per continuare.)` as const
-  },
-
-  'DOWNLOAD' <T extends string> (fileType: T) {
-    return `Scaricare ${fileType}` as const
-  },
-  'DOWNLOAD_AUDIO' <T extends string> (fileType: T) {
-    return `Scaricare ${fileType} Audio` as const
-  },
-
-  'IND_PARTS' () {
-    return 'Parti Singole' as const
-  },
-  'IND_PARTS_TOOLTIP' () {
-    return 'Scaricare Parti Singole (BETA)' as const
-  },
-
-  'VIEW_IN_LIBRESCORE' () {
-    return 'Visualizzare in LibreScore' as const
-  },
-
-  'FULL_SCORE' () {
-    return 'Spartito Completo' as const
-  },
-})
--- a/src/i18n/utils.ts
+++ b/src/i18n/utils.ts
@ -1,9 +0,0 @@
-
-import type { LOCALE } from './'
-
-/**
- * type checking only so no missing keys
- */
-export function createLocale<OBJ extends LOCALE> (obj: OBJ): OBJ {
-  return Object.freeze(obj)
-}
--- a/src/i18n/zh.ts
+++ b/src/i18n/zh.ts
@ -1,37 +0,0 @@
-
-import { createLocale } from './utils'
-
-export default createLocale({
-  'PROCESSING' () {
-    return '处理中…' as const
-  },
-  'BTN_ERROR' () {
-    return '❌下载失败!' as const
-  },
-
-  'DEPRECATION_NOTICE' (btnName: string) {
-    return `不建议使用\n请使用 \`单独分谱\` 里的 \`${btnName}\` 按钮代替\n（这也许仍会起作用。单击\`确定\`以继续。）` as const
-  },
-
-  'DOWNLOAD' <T extends string> (fileType: T) {
-    return `下载 ${fileType}` as const
-  },
-  'DOWNLOAD_AUDIO' <T extends string> (fileType: T) {
-    return `下载 ${fileType} 音频` as const
-  },
-
-  'IND_PARTS' () {
-    return '单独分谱' as const
-  },
-  'IND_PARTS_TOOLTIP' () {
-    return '下载单独分谱 (BETA)' as const
-  },
-
-  'VIEW_IN_LIBRESCORE' () {
-    return '在 LibreScore 中查看' as const
-  },
-
-  'FULL_SCORE' () {
-    return '完整乐谱' as const
-  },
-})
--- a/src/librescore-link.ts
+++ b/src/librescore-link.ts
@ -1,26 +0,0 @@
-import { assertRes, getFetch } from './utils'
-import { getMainCid } from './mscz'
-import { ScoreInfo } from './scoreinfo'
-
-const _getLink = (indexingInfo: string) => {
-  const { scorepack } = JSON.parse(indexingInfo)
-  return `https://librescore.org/score/${scorepack as string}`
-}
-
-export const getLibreScoreLink = async (scoreinfo: ScoreInfo, _fetch = getFetch()): Promise<string> => {
-  const mainCid = await getMainCid(scoreinfo, _fetch)
-  const ref = scoreinfo.getScorepackRef(mainCid)
-  const url = `https://ipfs.infura.io:5001/api/v0/dag/get?arg=${ref}`
-
-  const r0 = await _fetch(url)
-  if (r0.status !== 500) {
-    assertRes(r0)
-  }
-  const res: { Message: string } | string = await r0.json()
-  if (typeof res !== 'string') {
-    // read further error msg
-    throw new Error(res.Message)
-  }
-
-  return _getLink(res)
-}
--- a/src/main.ts
+++ b/src/main.ts
@ -1,81 +1,111 @@
 import './meta'

-import FileSaver from 'file-saver'
-import { waitForSheetLoaded, console } from './utils'
+import { waitForDocumentLoaded, saveAs } from './utils'
 import { downloadPDF } from './pdf'
 import { downloadMscz } from './mscz'
 import { getFileUrl } from './file'
-import { INDV_DOWNLOADS } from './mscore'
-import { getLibreScoreLink } from './librescore-link'
-import { BtnList, BtnAction, BtnListMode, ICON } from './btn'
-import { ScoreInfoInPage, SheetInfoInPage, getActualId } from './scoreinfo'
-import i18n from './i18n'
-
-const { saveAs } = FileSaver
+import { WebMscore, loadSoundFont } from './mscore'
+import { getDownloadBtn, BtnList, BtnAction } from './btn'
+import * as recaptcha from './recaptcha'
+import scoreinfo from './scoreinfo'

 const main = (): void => {
-  const btnList = new BtnList()
-  const scoreinfo = new ScoreInfoInPage(document)
-  const { fileName } = scoreinfo
+  // init recaptcha
+  // eslint-disable-next-line @typescript-eslint/no-floating-promises
+  recaptcha.init()

-  // eslint-disable-next-line no-void
-  void getActualId(scoreinfo)
-
-  let indvPartBtn: HTMLButtonElement | null = null
-  const fallback = () => {
-    // btns fallback to load from MSCZ file (`Individual Parts`)
-    return indvPartBtn?.click()
-  }
+  const btnList = new BtnList(getDownloadBtn())
+  const filename = scoreinfo.fileName

  btnList.add({
-    name: i18n('DOWNLOAD')('MSCZ'),
-    action: BtnAction.process(() => downloadMscz(scoreinfo, saveAs)),
+    name: 'Download MSCZ',
+    action: BtnAction.process(downloadMscz),
  })

  btnList.add({
-    name: i18n('DOWNLOAD')('PDF'),
-    action: BtnAction.process(() => downloadPDF(scoreinfo, new SheetInfoInPage(document)), fallback, 3 * 60 * 1000 /* 3min */),
+    name: 'Download PDF',
+    action: BtnAction.deprecate(
+      BtnAction.process(downloadPDF),
+    ),
  })

  btnList.add({
-    name: i18n('DOWNLOAD')('MXL'),
-    action: BtnAction.mscoreWindow(scoreinfo, async (w, score) => {
+    name: 'Download MusicXML',
+    action: BtnAction.mscoreWindow(async (w, score) => {
      const mxl = await score.saveMxl()
      const data = new Blob([mxl])
-      saveAs(data, `${fileName}.mxl`)
+      saveAs(data, `${filename}.mxl`)
      w.close()
    }),
  })

  btnList.add({
-    name: i18n('DOWNLOAD')('MIDI'),
-    action: BtnAction.download(() => getFileUrl(scoreinfo.id, 'midi'), fallback, 30 * 1000 /* 30s */),
+    name: 'Download MIDI',
+    action: BtnAction.deprecate(
+      BtnAction.download(() => getFileUrl('midi')),
+    ),
  })

  btnList.add({
-    name: i18n('DOWNLOAD')('MP3'),
-    action: BtnAction.download(() => getFileUrl(scoreinfo.id, 'mp3'), fallback, 30 * 1000 /* 30s */),
+    name: 'Download MP3',
+    action: BtnAction.download(() => getFileUrl('mp3')),
  })

-  indvPartBtn = btnList.add({
-    name: i18n('IND_PARTS')(),
-    tooltip: i18n('IND_PARTS_TOOLTIP')(),
-    action: BtnAction.mscoreWindow(scoreinfo, async (w, score, txt) => {
+  btnList.add({
+    name: 'Individual Parts',
+    tooltip: 'Download individual parts (BETA)',
+    action: BtnAction.mscoreWindow(async (w, score, txt) => {
      const metadata = await score.metadata()
      console.log('score metadata loaded by webmscore', metadata)

      // add the "full score" option as a "part" 
-      metadata.excerpts.unshift({ id: -1, title: i18n('FULL_SCORE')(), parts: [] })
+      metadata.excerpts.unshift({ id: -1, title: 'Full score', parts: [] })

      // render the part selection page
      txt.remove()
      const fieldset = w.document.createElement('fieldset')
      w.document.body.append(fieldset)

-      const downloads = INDV_DOWNLOADS
+      interface IndividualDownload {
+        name: string;
+        fileExt: string;
+        action (score: WebMscore): Promise<Uint8Array>;
+      }
+
+      const downloads: IndividualDownload[] = [
+        {
+          name: 'Download PDF',
+          fileExt: 'pdf',
+          action: (score) => score.savePdf(),
+        },
+        {
+          name: 'Download Part MSCZ',
+          fileExt: 'mscz',
+          action: (score) => score.saveMsc('mscz'),
+        },
+        {
+          name: 'Download Part MusicXML',
+          fileExt: 'mxl',
+          action: (score) => score.saveMxl(),
+        },
+        {
+          name: 'Download MIDI',
+          fileExt: 'mid',
+          action: (score) => score.saveMidi(true, true),
+        },
+        {
+          name: 'Download FLAC Audio',
+          fileExt: 'flac',
+          action: (score) => loadSoundFont(score).then(() => score.saveAudio('flac')),
+        },
+        {
+          name: 'Download OGG Audio',
+          fileExt: 'ogg',
+          action: (score) => loadSoundFont(score).then(() => score.saveAudio('ogg')),
+        },
+      ]

      // part selection
-      const DEFAULT_PART = -1 // initially select "full score"
      for (const excerpt of metadata.excerpts) {
        const id = excerpt.id
        const partName = excerpt.title
@ -84,7 +114,7 @@ const main = (): void => {
        e.name = 'score-part'
        e.type = 'radio'
        e.alt = partName
-        e.checked = id === DEFAULT_PART
+        e.checked = id === 0 // initially select the first part 
        e.onclick = () => {
          return score.setExcerptId(id) // set selected part
        }
@ -96,7 +126,7 @@ const main = (): void => {
        fieldset.append(e, label, br)
      }

-      await score.setExcerptId(DEFAULT_PART)
+      await score.setExcerptId(0) // initially select the first part 

      // submit buttons
      for (const d of downloads) {
@ -115,13 +145,13 @@ const main = (): void => {
          // lock the button when processing
          submitBtn.onclick = null
          submitBtn.disabled = true
-          submitBtn.value = i18n('PROCESSING')()
+          submitBtn.value = 'Processing…'

          const checked = fieldset.querySelector('input:checked') as HTMLInputElement
          const partName = checked.alt

          const data = new Blob([await d.action(score)])
-          saveAs(data, `${fileName} - ${partName}.${d.fileExt}`)
+          saveAs(data, `${filename} - ${partName}.${d.fileExt}`)

          // unlock button
          initBtn()
@ -132,17 +162,8 @@ const main = (): void => {
    }),
  })

-  btnList.add({
-    name: i18n('VIEW_IN_LIBRESCORE')(),
-    action: BtnAction.openUrl(() => getLibreScoreLink(scoreinfo)),
-    tooltip: 'BETA',
-    icon: ICON.LIBRESCORE,
-    lightTheme: true,
-  })
-
-  // eslint-disable-next-line @typescript-eslint/no-floating-promises
-  btnList.commit(BtnListMode.InPage)
+  btnList.commit()
 }

 // eslint-disable-next-line @typescript-eslint/no-floating-promises
-waitForSheetLoaded().then(main)
+waitForDocumentLoaded().then(main)
--- a/src/meta.js
+++ b/src/meta.js
@ -3,19 +3,12 @@
 // @namespace    https://www.xmader.com/
 // @homepageURL  https://github.com/Xmader/musescore-downloader/
 // @supportURL   https://github.com/Xmader/musescore-downloader/issues
-// @updateURL    https://msdl.librescore.org/install.user.js
-// @downloadURL  https://msdl.librescore.org/install.user.js
 // @version      %VERSION%
 // @description  download sheet music from musescore.com for free, no login or Musescore Pro required | 免登录、免 Musescore Pro，免费下载 musescore.com 上的曲谱
 // @author       Xmader
-// @icon         https://librescore.org/img/icons/logo.svg
 // @match        https://musescore.com/*/*
-// @match        https://s.musescore.com/*/*
 // @license      MIT
-// @copyright    Copyright (c) 2019-2021 Xmader
-// @grant        unsafeWindow
-// @grant        GM.registerMenuCommand
-// @grant        GM.addElement
-// @grant        GM.openInTab
+// @copyright    Copyright (c) 2019-2020 Xmader
+// @grant        none
 // @run-at       document-start
 // ==/UserScript==
--- a/src/mscore.ts
+++ b/src/mscore.ts
@ -1,27 +1,19 @@
-/* eslint-disable @typescript-eslint/no-var-requires */
-/* eslint-disable @typescript-eslint/explicit-module-boundary-types */

 import { fetchMscz } from './mscz'
 import { fetchData } from './utils'
-import { ScoreInfo } from './scoreinfo'
-import isNodeJs from 'detect-node'
-import i18n from './i18n'
-import { dependencies as depVers } from '../package.json'

-const WEBMSCORE_URL = `https://cdn.jsdelivr.net/npm/webmscore@${depVers.webmscore}/webmscore.js`
+const WEBMSCORE_URL = 'https://cdn.jsdelivr.net/npm/webmscore@0.10/webmscore.js'

 // fonts for Chinese characters (CN) and Korean hangul (KR)
 // JP characters are included in the CN font
-const FONT_URLS = ['CN', 'KR'].map(l => `https://cdn.jsdelivr.net/npm/@librescore/fonts@${depVers['@librescore/fonts']}/SourceHanSans${l}.min.woff2`)
+const FONT_URLS = ['CN', 'KR'].map(l => `https://cdn.jsdelivr.net/npm/@librescore/fonts/SourceHanSans${l}-Regular.woff2`)

-const SF3_URL = `https://cdn.jsdelivr.net/npm/@librescore/sf3@${depVers['@librescore/sf3']}/FluidR3Mono_GM.sf3`
+const SF3_URL = 'https://cdn.jsdelivr.net/npm/@librescore/sf3/FluidR3Mono_GM.sf3'
 const SOUND_FONT_LOADED = Symbol('SoundFont loaded')

 export type WebMscore = import('webmscore').default
-export type WebMscoreConstr = typeof import('webmscore').default

-const initMscore = async (w: Window): Promise<WebMscoreConstr> => {
-  if (!isNodeJs) { // attached to a page
+const initMscore = async (w: Window) => {
  if (!w['WebMscore']) {
    // init webmscore (https://github.com/LibreScore/webmscore)
    const script = w.document.createElement('script')
@ -29,10 +21,6 @@ const initMscore = async (w: Window): Promise<WebMscoreConstr> => {
    w.document.body.append(script)
    await new Promise(resolve => { script.onload = resolve })
  }
-    return w['WebMscore'] as WebMscoreConstr
-  } else { // nodejs
-    return require('webmscore').default as WebMscoreConstr
-  }
 }

 let fonts: Promise<Uint8Array[]> | undefined
@ -40,37 +28,17 @@ const initFonts = () => {
  // load CJK fonts
  // CJK (East Asian) characters will be rendered as "tofu" if there is no font
  if (!fonts) {
-    if (isNodeJs) {
-      // module.exports.CN = ..., module.exports.KR = ...
-      const FONTS = Object.values(require('@librescore/fonts'))
-
-      const fs = require('fs')
-      fonts = Promise.all(
-        FONTS.map((path: string) => fs.promises.readFile(path) as Promise<Buffer>),
-      )
-    } else {
    fonts = Promise.all(
      FONT_URLS.map(url => fetchData(url)),
    )
  }
 }
-}

 export const loadSoundFont = (score: WebMscore): Promise<void> => {
  if (!score[SOUND_FONT_LOADED]) {
    const loadPromise = (async () => {
-      let data: Uint8Array
-      if (isNodeJs) {
-        // module.exports.FluidR3Mono = ...
-        const SF3 = Object.values(require('@librescore/sf3'))[0]
-        const fs = require('fs')
-        data = await fs.promises.readFile(SF3)
-      } else {
-        data = await fetchData(SF3_URL)
-      }
-
      await score.setSoundFont(
-        data,
+        await fetchData(SF3_URL),
      )
    })()
    score[SOUND_FONT_LOADED] = loadPromise
@ -78,60 +46,17 @@ export const loadSoundFont = (score: WebMscore): Promise<void> => {
  return score[SOUND_FONT_LOADED] as Promise<void>
 }

-export const loadMscore = async (scoreinfo: ScoreInfo, w?: Window): Promise<WebMscore> => {
+export const loadMscore = async (w: Window): Promise<WebMscore> => {
  initFonts()
-  const WebMscore = await initMscore(w!)
+  await initMscore(w)

+  const WebMscore: typeof import('webmscore').default = w['WebMscore']
  // parse mscz data
  const data = new Uint8Array(
-    new Uint8Array(await fetchMscz(scoreinfo)), // copy its ArrayBuffer
+    new Uint8Array(await fetchMscz()), // copy its ArrayBuffer
  )
  const score = await WebMscore.load('mscz', data, await fonts)
  await score.generateExcerpts()

  return score
 }
-
-export interface IndividualDownload {
-  name: string;
-  fileExt: string;
-  action (score: WebMscore): Promise<Uint8Array>;
-}
-
-export const INDV_DOWNLOADS: IndividualDownload[] = [
-  {
-    name: i18n('DOWNLOAD')('PDF'),
-    fileExt: 'pdf',
-    action: (score) => score.savePdf(),
-  },
-  {
-    name: i18n('DOWNLOAD')('MSCZ'),
-    fileExt: 'mscz',
-    action: (score) => score.saveMsc('mscz'),
-  },
-  {
-    name: i18n('DOWNLOAD')('MusicXML'),
-    fileExt: 'mxl',
-    action: (score) => score.saveMxl(),
-  },
-  {
-    name: i18n('DOWNLOAD')('MIDI'),
-    fileExt: 'mid',
-    action: (score) => score.saveMidi(true, true),
-  },
-  {
-    name: i18n('DOWNLOAD_AUDIO')('MP3'),
-    fileExt: 'mp3',
-    action: (score) => loadSoundFont(score).then(() => score.saveAudio('mp3')),
-  },
-  {
-    name: i18n('DOWNLOAD_AUDIO')('FLAC'),
-    fileExt: 'flac',
-    action: (score) => loadSoundFont(score).then(() => score.saveAudio('flac')),
-  },
-  {
-    name: i18n('DOWNLOAD_AUDIO')('OGG'),
-    fileExt: 'ogg',
-    action: (score) => loadSoundFont(score).then(() => score.saveAudio('ogg')),
-  },
-]
--- a/src/mscz.ts
+++ b/src/mscz.ts
@ -1,88 +1,26 @@

-import { assertRes, getFetch } from './utils'
-import { ScoreInfo } from './scoreinfo'
+import * as recaptcha from './recaptcha'
+import { saveAs } from './utils'
+import scoreinfo from './scoreinfo'

-export const MSCZ_BUF_SYM = Symbol('msczBufferP')
-export const MSCZ_URL_SYM = Symbol('msczUrl')
-export const MAIN_CID_SYM = Symbol('mainCid')
-
-const IPNS_KEY = 'QmSdXtvzC8v8iTTZuj5cVmiugnzbR1QATYRcGix4bBsioP'
-const IPNS_RS_URL = `https://ipfs.io/api/v0/dag/resolve?arg=/ipns/${IPNS_KEY}`
-
-export const getMainCid = async (scoreinfo: ScoreInfo, _fetch = getFetch()): Promise<string> => {
-  // look for the persisted msczUrl inside scoreinfo
-  let result = scoreinfo.store.get(MAIN_CID_SYM) as string
-  if (result) {
-    return result
-  }
-
-  const r = await _fetch(IPNS_RS_URL)
-  assertRes(r)
-  const json = await r.json()
-  result = json.Cid['/']
-
-  scoreinfo.store.set(MAIN_CID_SYM, result) // persist to scoreinfo
-  return result
-}
-
-export const loadMsczUrl = async (scoreinfo: ScoreInfo, _fetch = getFetch()): Promise<string> => {
-  // look for the persisted msczUrl inside scoreinfo
-  let result = scoreinfo.store.get(MSCZ_URL_SYM) as string
-  if (result) {
-    return result
-  }
-
-  const mainCid = await getMainCid(scoreinfo, _fetch)
-
-  const url = scoreinfo.getMsczCidUrl(mainCid)
-  const r0 = await _fetch(url)
-  // ipfs-http-gateway specific error
-  // may read further error msg as json
-  if (r0.status !== 500) {
-    assertRes(r0)
-  }
-  const cidRes: { Key: string; Message: string } = await r0.json()
-
-  const cid = cidRes.Key
-  if (!cid) {
-    // read further error msg
-    const err = cidRes.Message
-    if (err.includes('no link named')) { // file not found
-      throw new Error('Score not in dataset')
-    } else {
-      throw new Error(err)
-    }
-  }
-  result = `https://ipfs.infura.io/ipfs/${cid}`
-
-  scoreinfo.store.set(MSCZ_URL_SYM, result) // persist to scoreinfo
-  return result
-}
-
-export const fetchMscz = async (scoreinfo: ScoreInfo, _fetch = getFetch()): Promise<ArrayBuffer> => {
-  let msczBufferP = scoreinfo.store.get(MSCZ_BUF_SYM) as Promise<ArrayBuffer> | undefined
+let msczBufferP: Promise<ArrayBuffer> | undefined

+export const fetchMscz = async (): Promise<ArrayBuffer> => {
  if (!msczBufferP) {
+    const url = scoreinfo.msczUrl
    msczBufferP = (async (): Promise<ArrayBuffer> => {
-      const url = await loadMsczUrl(scoreinfo, _fetch)
-      const r = await _fetch(url)
-      assertRes(r)
+      const token = await recaptcha.execute()
+      const r = await fetch(url + token)
      const data = await r.arrayBuffer()
      return data
    })()
-    scoreinfo.store.set(MSCZ_BUF_SYM, msczBufferP)
  }

  return msczBufferP
 }

-// eslint-disable-next-line @typescript-eslint/require-await
-export const setMscz = async (scoreinfo: ScoreInfo, buffer: ArrayBuffer): Promise<void> => {
-  scoreinfo.store.set(MSCZ_BUF_SYM, Promise.resolve(buffer))
-}
-
-export const downloadMscz = async (scoreinfo: ScoreInfo, saveAs: typeof import('file-saver').saveAs): Promise<void> => {
-  const data = new Blob([await fetchMscz(scoreinfo)])
+export const downloadMscz = async (): Promise<void> => {
+  const data = new Blob([await fetchMscz()])
  const filename = scoreinfo.fileName
  saveAs(data, `${filename}.mscz`)
 }
--- a/src/msdl/cli.js
+++ b/src/msdl/cli.js
@ -1,2 +0,0 @@
-#!/usr/bin/env node
-require("musescore-downloader/dist/cli.js")
--- a/src/msdl/package.json
+++ b/src/msdl/package.json
@ -1,19 +0,0 @@
-{
-  "name": "msdl",
-  "version": "%VERSION%",
-  "author": "Xmader",
-  "bin": "cli.js",
-  "description": "Alias for musescore-downloader",
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/Xmader/musescore-downloader.git"
-  },
-  "bugs": {
-    "url": "https://github.com/Xmader/musescore-downloader/issues"
-  },
-  "homepage": "https://github.com/Xmader/musescore-downloader#readme",
-  "license": "MIT",
-  "dependencies": {
-    "musescore-downloader": "%VERSION%"
-  }
-}
--- a/src/npm-data.ts
+++ b/src/npm-data.ts
@ -1,34 +0,0 @@
-/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
-
-import { name as pkgName, version as pkgVer } from '../package.json'
-import { getFetch } from './utils'
-
-const IS_NPX_REG = /_npx(\/|\\)\d+\1/
-const NPM_REGISTRY = 'https://registry.npmjs.org'
-
-export function isNpx (): boolean {
-  // file is in a npx cache dir
-  // TODO: installed locally?
-  return __dirname.match(IS_NPX_REG) !== null
-}
-
-export function getSelfVer (): string {
-  return pkgVer
-}
-
-export async function getLatestVer (_fetch = getFetch()): Promise<string> {
-  // fetch pkg info from the npm registry
-  const r = await _fetch(`${NPM_REGISTRY}/${pkgName}`)
-  const json = await r.json()
-  return json['dist-tags'].latest as string
-}
-
-export async function getVerInfo () {
-  const installed = getSelfVer()
-  const latest = await getLatestVer()
-  return {
-    installed,
-    latest,
-    isLatest: installed === latest,
-  }
-}
--- a/src/pdf.ts
+++ b/src/pdf.ts
@ -1,14 +1,14 @@

 import { PDFWorkerHelper } from './worker-helper'
 import { getFileUrl } from './file'
-import FileSaver from 'file-saver'
-import { ScoreInfo, SheetInfo } from './scoreinfo'
+import { saveAs } from './utils'
+import scoreinfo from './scoreinfo'

 let pdfBlob: Blob

 const _downloadPDF = async (imgURLs: string[], imgType: 'svg' | 'png', name = ''): Promise<void> => {
  if (pdfBlob) {
-    return FileSaver.saveAs(pdfBlob, `${name}.pdf`)
+    return saveAs(pdfBlob, `${name}.pdf`)
  }

  const cachedImg = document.querySelector('img[src*=score_]') as HTMLImageElement
@ -20,18 +20,18 @@ const _downloadPDF = async (imgURLs: string[], imgType: 'svg' | 'png', name = ''

  pdfBlob = new Blob([pdfArrayBuffer])

-  FileSaver.saveAs(pdfBlob, `${name}.pdf`)
+  saveAs(pdfBlob, `${name}.pdf`)
 }

-export const downloadPDF = async (scoreinfo: ScoreInfo, sheet: SheetInfo): Promise<void> => {
-  const imgType = sheet.imgType
-  const pageCount = sheet.pageCount
+export const downloadPDF = async (): Promise<void> => {
+  const imgType = scoreinfo.sheetImgType
+  const pageCount = scoreinfo.pageCount

  const rs = Array.from({ length: pageCount }).map((_, i) => {
    if (i === 0) { // The url to the first page is static. We don't need to use API to obtain it.
-      return sheet.thumbnailUrl
+      return scoreinfo.baseUrl + `score_${i}.${imgType}`
    } else { // obtain image urls using the API
-      return getFileUrl(scoreinfo.id, 'img', i)
+      return getFileUrl('img', i)
    }
  })
  const sheetImgURLs = await Promise.all(rs)
--- a/src/recaptcha.ts
+++ b/src/recaptcha.ts
@ -0,0 +1,48 @@
+
+/**
+ * the site key for Google reCAPTCHA v3
+ */
+const SITE_KEY = '6Ldxtt8UAAAAALvcRqWTlVOVIB7MmEWwN-zw_9fM'
+
+type token = string;
+interface GRecaptcha {
+  ready (cb: () => any): void;
+  execute (siteKey: string, opts: { action: string }): Promise<token>;
+}
+
+let gr: GRecaptcha | Promise<GRecaptcha>
+
+/**
+ * load reCAPTCHA
+ */
+const load = (): Promise<GRecaptcha> => {
+  // load script
+  const script = document.createElement('script')
+  script.src = `https://www.recaptcha.net/recaptcha/api.js?render=${SITE_KEY}`
+  script.async = true
+  document.body.appendChild(script)
+
+  // add css
+  const style = document.createElement('style')
+  style.innerHTML = '.grecaptcha-badge { display: none !important; }'
+  document.head.appendChild(style)
+
+  return new Promise((resolve) => {
+    script.onload = (): void => {
+      const grecaptcha: GRecaptcha = window['grecaptcha']
+      grecaptcha.ready(() => resolve(grecaptcha))
+    }
+  })
+}
+
+export const init = (): GRecaptcha | Promise<GRecaptcha> => {
+  if (!gr) {
+    gr = load()
+  }
+  return gr
+}
+
+export const execute = async (): Promise<token> => {
+  const captcha = await init()
+  return captcha.execute(SITE_KEY, { action: 'downloadmscz' })
+}
--- a/src/scoreinfo.ts
+++ b/src/scoreinfo.ts
@ -1,154 +1,87 @@
+/* eslint-disable @typescript-eslint/no-unsafe-return */

-import { getFetch, escapeFilename, assertRes } from './utils'
-import { getMainCid } from './mscz'
-
-export abstract class ScoreInfo {
-  private readonly RADIX = 20;
-  private readonly INDEX_RADIX = 32;
-
-  abstract id: number;
-  abstract title: string;
-
-  public store = new Map<symbol, any>();
-
-  get idLastDigit (): number {
-    return (+this.id) % this.RADIX
+// run at document-start
+export const ugappJsStore: Record<string, any> | null = (() => {
+  try {
+    const l = document.body.children as HTMLCollectionOf<HTMLElement>
+    const el = [...l].find(e => Object.keys(e.dataset).length > 0) as HTMLDivElement
+    const json = Object.values(el.dataset)[0] as string
+    return JSON.parse(json)
+  } catch (err) {
+    console.error(err)
+    return null
  }
+})()

-  get fileName (): string {
-    return escapeFilename(this.title)
-  }
+export const scoreinfo = {

-  public getMsczIpfsRef (mainCid: string): string {
-    return `/ipfs/${mainCid}/${this.idLastDigit}/${this.id}.mscz`
-  }
+  get playerdata (): any {
+    // @ts-ignore
+    return ugappJsStore.store.page.data.score
+  },

-  public getMsczCidUrl (mainCid: string): string {
-    return `https://ipfs.infura.io:5001/api/v0/block/stat?arg=${this.getMsczIpfsRef(mainCid)}`
-  }
-
-  public getScorepackRef (mainCid: string): string {
-    return `/ipfs/${mainCid}/index/${(+this.id) % this.INDEX_RADIX}/${this.id}`
-  }
-}
-
-export class ScoreInfoObj extends ScoreInfo {
-  constructor (public id: number = 0, public title: string = '') { super() }
-}
-
-export class ScoreInfoInPage extends ScoreInfo {
-  constructor (private document: Document) { super() }
-
-  get id (): number {
-    const el = this.document.querySelector("meta[property='al:ios:url']") as HTMLMetaElement
+  get id (this: typeof scoreinfo): number {
+    try {
+      return this.playerdata.id
+    } catch {
+      const el = document.querySelector("meta[property='al:ios:url']") as HTMLMetaElement
      const m = el.content.match(/(\d+)$/) as RegExpMatchArray
      return +m[1]
    }
+  },

-  get title (): string {
-    const el = this.document.querySelector("meta[property='og:title']") as HTMLMetaElement
+  get title (this: typeof scoreinfo): string {
+    try {
+      return this.playerdata.title
+    } catch {
+      const el = document.querySelector("meta[property='og:title']") as HTMLMetaElement
      return el.content
    }
+  },

-  get baseUrl (): string {
-    const el = this.document.querySelector("meta[property='og:image']") as HTMLMetaElement
-    const m = el.content.match(/^(.+\/)score_/) as RegExpMatchArray
-    return m[1]
+  get fileName (this: typeof scoreinfo): string {
+    return this.title.replace(/[\s<>:{}"/\\|?*~.\0\cA-\cZ]+/g, '_')
+  },
+
+  get pageCount (this: typeof scoreinfo): number {
+    try {
+      return this.playerdata.pages_count
+    } catch {
+      return document.querySelectorAll('.gXB83').length
    }
+  },
+
+  get baseUrl (this: typeof scoreinfo): string {
+    let thumbnailUrl: string
+    try {
+      thumbnailUrl = this.playerdata.thumbnails.original
+    } catch {
+      const el = document.querySelector("meta[property='og:image']") as HTMLMetaElement
+      thumbnailUrl = el.content
    }

-export class ScoreInfoHtml extends ScoreInfo {
-  private readonly ID_REG = /<meta property="al:ios:url" content="musescore:\/\/score\/(\d+)">/
-  private readonly TITLE_REG = /<meta property="og:title" content="(.*)">/
-  private readonly BASEURL_REG = /<meta property="og:image" content="(.+\/)score_.*">/
+    const { origin, pathname } = new URL(thumbnailUrl)
+    // remove the last part
+    return origin + pathname.split('/').slice(0, -1).join('/') + '/'
+  },

-  constructor (private html: string) { super() }
+  get msczUrl (this: typeof scoreinfo): string {
+    // https://github.com/Xmader/cloudflare-worker-musescore-mscz
+    return `https://musescore.now.sh/api/mscz?id=${this.id}&token=`
+  },

-  get id (): number {
-    const m = this.html.match(this.ID_REG)
-    if (!m) return 0
-    return +m[1]
-  }
-
-  get title (): string {
-    const m = this.html.match(this.TITLE_REG)
-    if (!m) return ''
-    return m[1]
-  }
-
-  get baseUrl (): string {
-    const m = this.html.match(this.BASEURL_REG)
-    if (!m) return ''
-    return m[1]
-  }
-
-  static async request (url: string, _fetch = getFetch()): Promise<ScoreInfoHtml> {
-    const r = await _fetch(url)
-    if (!r.ok) return new ScoreInfoHtml('')
-
-    const html = await r.text()
-    return new ScoreInfoHtml(html)
-  }
-}
-
-export abstract class SheetInfo {
-  abstract pageCount: number;
-  abstract thumbnailUrl: string;
-
-  get imgType (): 'svg' | 'png' {
-    const thumbnail = this.thumbnailUrl
-    const imgtype = thumbnail.match(/score_0\.(\w+)/)![1]
+  get sheetImgType (): 'svg' | 'png' {
+    try {
+      const imgE = document.querySelector('img[src*=score_]') as HTMLImageElement
+      const { pathname } = new URL(imgE.src)
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      const imgtype = pathname.match(/\.(\w+)$/)![1]
      return imgtype as 'svg' | 'png'
+    } catch (_) {
+      // return null
+      return 'svg'
    }
+  },
 }

-export class SheetInfoInPage extends SheetInfo {
-  constructor (private document: Document) { super() }
-
-  private get sheet0Img (): HTMLImageElement | null {
-    return this.document.querySelector('img[src*=score_]')
-  }
-
-  get pageCount (): number {
-    const sheet0Div = this.sheet0Img?.parentElement
-    if (!sheet0Div) {
-      throw new Error('no sheet images found')
-    }
-    return this.document.getElementsByClassName(sheet0Div.className).length
-  }
-
-  get thumbnailUrl (): string {
-    // url to the image of the first page
-    const el = this.document.querySelector<HTMLLinkElement>('link[as=image]')
-    const url = (el?.href || this.sheet0Img?.src) as string
-    return url.split('@')[0]
-  }
-}
-
-export const getActualId = async (scoreinfo: ScoreInfoInPage | ScoreInfoHtml, _fetch = getFetch()): Promise<number> => {
-  if (scoreinfo.id <= 1000000000000) {
-    // actual id already
-    return scoreinfo.id
-  }
-
-  const mainCid = await getMainCid(scoreinfo, _fetch)
-  const ref = `${mainCid}/sid2id/${scoreinfo.id}`
-  const url = `https://ipfs.infura.io:5001/api/v0/dag/get?arg=${ref}`
-
-  const r0 = await _fetch(url)
-  if (r0.status !== 500) {
-    assertRes(r0)
-  }
-  const res: { Message: string } | number = await r0.json()
-  if (typeof res !== 'number') {
-    // read further error msg
-    throw new Error(res.Message)
-  }
-
-  // assign the actual id back to scoreinfo
-  Object.defineProperty(scoreinfo, 'id', {
-    get () { return res },
-  })
-
-  return res
-}
+export default scoreinfo
--- a/src/utils.ts
+++ b/src/utils.ts
@ -1,12 +1,7 @@

-import isNodeJs from 'detect-node'
-import { isGmAvailable, _GM } from './gm'
+import FileSaver from 'file-saver/dist/FileSaver.js'

-export const DISCORD_URL = 'https://discord.gg/gSsTUvJmD8'
-
-export const escapeFilename = (s: string): string => {
-  return s.replace(/[\s<>:{}"/\\|?*~.\0\cA-\cZ]+/g, '_')
-}
+export const saveAs: typeof import('file-saver').saveAs = FileSaver.saveAs

 export const getIndexPath = (id: number): string => {
  const idStr = String(id)
@ -18,111 +13,12 @@ export const getIndexPath = (id: number): string => {
  return indexN.join('/')
 }

-const NODE_FETCH_HEADERS = {
-  'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0',
-  'Accept-Language': 'en-US,en;q=0.8',
-}
-
-export const getFetch = (): typeof fetch => {
-  if (!isNodeJs) {
-    return fetch
-  } else {
-    // eslint-disable-next-line @typescript-eslint/no-var-requires
-    const nodeFetch = require('node-fetch')
-    return (input: RequestInfo, init?: RequestInit) => {
-      init = Object.assign({ headers: NODE_FETCH_HEADERS }, init)
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-return
-      return nodeFetch(input, init)
-    }
-  }
-}
-
 export const fetchData = async (url: string, init?: RequestInit): Promise<Uint8Array> => {
  const r = await fetch(url, init)
  const data = await r.arrayBuffer()
  return new Uint8Array(data)
 }

-export const assertRes = (r: Response): void => {
-  if (!r.ok) throw new Error(`${r.url} ${r.status} ${r.statusText}`)
-}
-
-export const useTimeout = async <T> (promise: T | Promise<T>, ms: number): Promise<T> => {
-  if (!(promise instanceof Promise)) {
-    return promise
-  }
-
-  return new Promise((resolve, reject) => {
-    const i = setTimeout(() => {
-      reject(new Error('timeout'))
-    }, ms)
-    promise.then(resolve, reject).finally(() => clearTimeout(i))
-  })
-}
-
-export const getSandboxWindowAsync = async (targetEl: Element | undefined = undefined): Promise<Window> => {
-  if (typeof document === 'undefined') return {} as any as Window
-
-  if (isGmAvailable('addElement')) {
-    // create iframe using GM_addElement API
-    const iframe = await _GM.addElement('iframe', {})
-    iframe.style.display = 'none'
-    return iframe.contentWindow as Window
-  }
-
-  if (!targetEl) {
-    return new Promise((resolve) => {
-      // You need ads in your pages, right?
-      const observer = new MutationObserver(() => {
-        for (let i = 0; i < window.frames.length; i++) {
-          // find iframe windows created by ads
-          const frame = frames[i]
-          try {
-            const href = frame.location.href
-            if (href === location.href || href === 'about:blank') {
-              resolve(frame)
-              return
-            }
-          } catch { }
-        }
-      })
-      observer.observe(document.body, { subtree: true, childList: true })
-    })
-  }
-
-  return new Promise((resolve) => {
-    const eventName = 'onmousemove'
-    const id = Math.random().toString()
-
-    targetEl[id] = (iframe: HTMLIFrameElement) => {
-      delete targetEl[id]
-      targetEl.removeAttribute(eventName)
-
-      iframe.style.display = 'none'
-      targetEl.append(iframe)
-      const w = iframe.contentWindow
-      resolve(w as Window)
-    }
-
-    targetEl.setAttribute(eventName, `this['${id}'](document.createElement('iframe'))`)
-  })
-}
-
-export const getUnsafeWindow = (): Window => {
-  // eslint-disable-next-line no-eval
-  return window.eval('window') as Window
-}
-
-export const console: Console = (window || global).console // Object.is(window.console, unsafeWindow.console) == false
-
-export const windowOpenAsync = (targetEl: Element | undefined, ...args: Parameters<Window['open']>): Promise<Window | null> => {
-  return getSandboxWindowAsync(targetEl).then(w => w.open(...args))
-}
-
-export const attachShadow = (el: Element): ShadowRoot => {
-  return Element.prototype.attachShadow.call(el, { mode: 'closed' }) as ShadowRoot
-}
-
 export const waitForDocumentLoaded = (): Promise<void> => {
  if (document.readyState !== 'complete') {
    return new Promise(resolve => {
@ -138,23 +34,3 @@ export const waitForDocumentLoaded = (): Promise<void> => {
    return Promise.resolve()
  }
 }
-
-/**
- * Run script before the page is fully loaded
- */
-export const waitForSheetLoaded = (): Promise<void> => {
-  if (document.readyState !== 'complete') {
-    return new Promise(resolve => {
-      const observer = new MutationObserver(() => {
-        const img = document.querySelector('img')
-        if (img) {
-          resolve()
-          observer.disconnect()
-        }
-      })
-      observer.observe(document, { childList: true, subtree: true })
-    })
-  } else {
-    return Promise.resolve()
-  }
-}
--- a/src/webpack-hook.ts
+++ b/src/webpack-hook.ts
@ -1,16 +1,11 @@
 /* eslint-disable @typescript-eslint/no-unsafe-return */
 /* eslint-disable @typescript-eslint/explicit-module-boundary-types */

-import { hookNative } from './anti-detection'
-import { console, getUnsafeWindow } from './utils'
-
-const CHUNK_PUSH_FN = /^function [^r]\(\w\){/
-
 interface Module {
  (module, exports, __webpack_require__): void;
 }

-type WebpackJson = [(number | string)[], { [id: string]: Module }, any[]?][]
+type WebpackJson = [number, { [id: string]: Module }][]

 const moduleLookup = (id: string, globalWebpackJson: WebpackJson) => {
  const pack = globalWebpackJson.find(x => x[1][id])!
@ -52,122 +47,4 @@ export const webpackHook = (moduleId: string, moduleOverrides: { [id: string]: M
  return t(moduleId)
 }

-export const ALL = '*'
-
-export const [webpackGlobalOverride, onPackLoad] = (() => {
-  type OnPackLoadFn = (pack: WebpackJson[0]) => any
-
-  const moduleOverrides: { [id: string]: Module } = {}
-  const onPackLoadFns: OnPackLoadFn[] = []
-
-  function applyOverride (pack: WebpackJson[0]) {
-    let entries = Object.entries(moduleOverrides)
-    // apply to all
-    const all = moduleOverrides[ALL]
-    if (all) {
-      entries = Object.keys(pack[1]).map(id => [id, all])
-    }
-
-    entries.forEach(([id, override]) => {
-      const mod = pack[1][id]
-      if (mod) {
-        pack[1][id] = function (n, r, t) {
-          // make exports configurable
-          t = Object.assign(t, {
-            d (exp, name, fn) {
-              return Object.defineProperty(exp, name, { enumerable: true, get: fn, configurable: true })
-            },
-          })
-          mod(n, r, t)
-          override(n, r, t)
-        }
-      }
-    })
-  }
-
-  // hook `webpackJsonpmusescore.push` as soon as `webpackJsonpmusescore` is available
-  const _w = getUnsafeWindow()
-  let jsonp = _w['webpackJsonpmusescore']
-  let hooked = false
-  Object.defineProperty(_w, 'webpackJsonpmusescore', {
-    get () { return jsonp },
-    set (v: WebpackJson) {
-      jsonp = v
-      if (!hooked && v.push.toString().match(CHUNK_PUSH_FN)) {
-        hooked = true
-        hookNative(v, 'push', (_fn) => {
-          return function (pack) {
-            onPackLoadFns.forEach(fn => fn(pack))
-            applyOverride(pack)
-            return _fn.call(this, pack)
-          }
-        })
-      }
-    },
-  })
-
-  return [
-    // set overrides
-    (moduleId: string, override: Module) => {
-      moduleOverrides[moduleId] = override
-    },
-    // set onPackLoad listeners
-    (fn: OnPackLoadFn) => {
-      onPackLoadFns.push(fn)
-    },
-  ] as const
-})()
-
-export const webpackContext = new Promise<any>((resolve) => {
-  webpackGlobalOverride(ALL, (n, r, t) => {
-    resolve(t)
-  })
-})
-
-const PACK_ID_REG = /\+(\{.*?"\})\[\w\]\+/
-
-export const loadAllPacks = () => {
-  return webpackContext.then((ctx) => {
-    try {
-      const fn = ctx.e.toString()
-      const packsData = fn.match(PACK_ID_REG)[1] as string
-      // eslint-disable-next-line no-new-func, @typescript-eslint/no-implied-eval
-      const packs = Function(`return (${packsData})`)() as { [id: string]: string }
-
-      Object.keys(packs).forEach((id) => {
-        ctx.e(id)
-      })
-    } catch (err) {
-      console.error(err)
-    }
-  })
-}
-
-const OBF_FN_REG = /\w\(".{4}"\),(\w)=(\[".+?\]);\w=\1,\w=(\d+).+?\);var (\w=.+?,\w\})/
-export const OBFUSCATED_REG = /(\w)\((\d+),"(.{4})"\)/g
-
-export const getObfuscationCtx = (mod: Module): (n: number, s: string) => string => {
-  const str = mod.toString()
-  const m = str.match(OBF_FN_REG)
-  if (!m) return () => ''
-
-  try {
-    const arrVar = m[1]
-    const arr = JSON.parse(m[2])
-
-    let n = +m[3] + 1
-    for (; --n;) arr.push(arr.shift())
-
-    const fnStr = m[4]
-    const ctxStr = `var ${arrVar}=${JSON.stringify(arr)};return (${fnStr})`
-    // eslint-disable-next-line no-new-func, @typescript-eslint/no-implied-eval
-    const fn = new Function(ctxStr)()
-
-    return fn
-  } catch (err) {
-    console.error(err)
-    return () => ''
-  }
-}
-
 export default webpackHook
--- a/src/worker-helper.ts
+++ b/src/worker-helper.ts
@ -4,7 +4,7 @@ import { PDFWorker } from '../dist/cache/worker'

 const scriptUrlFromFunction = (fn: () => any): string => {
  const blob = new Blob(['(' + fn.toString() + ')()'], { type: 'application/javascript' })
-  return window.URL.createObjectURL(blob)
+  return URL.createObjectURL(blob)
 }

 export class PDFWorkerHelper extends Worker {
--- a/src/worker.ts
+++ b/src/worker.ts
@ -6,9 +6,7 @@ import SVGtoPDF from 'svg-to-pdfkit'

 type ImgType = 'svg' | 'png'

-type DataResultType = 'dataUrl' | 'text'
-
-const readData = (blob: Blob, type: DataResultType): Promise<string> => {
+const getDataURL = (blob: Blob): Promise<string> => {
  return new Promise((resolve, reject) => {
    const reader = new FileReader()
    reader.onload = (): void => {
@ -16,22 +14,22 @@ const readData = (blob: Blob, type: DataResultType): Promise<string> => {
      resolve(result as string)
    }
    reader.onerror = reject
-    if (type === 'dataUrl') {
    reader.readAsDataURL(blob)
-    } else {
-      reader.readAsText(blob)
-    }
  })
 }

-const fetchBlob = async (imgUrl: string): Promise<Blob> => {
-  const r = await fetch(imgUrl, {
-    cache: 'no-cache',
-  })
-  return r.blob()
+const fetchDataURL = async (imgUrl: string): Promise<string> => {
+  const r = await fetch(imgUrl)
+  const blob = await r.blob()
+  return getDataURL(blob)
 }

-const generatePDF = async (imgBlobs: Blob[], imgType: ImgType, width: number, height: number): Promise<ArrayBuffer> => {
+const fetchText = async (imgUrl: string): Promise<string> => {
+  const r = await fetch(imgUrl)
+  return r.text()
+}
+
+const generatePDF = async (imgURLs: string[], imgType: ImgType, width: number, height: number): Promise<ArrayBuffer> => {
  // @ts-ignore
  const pdf = new (PDFDocument as typeof import('pdfkit'))({
    // compress: true,
@ -42,7 +40,7 @@ const generatePDF = async (imgBlobs: Blob[], imgType: ImgType, width: number, he
  })

  if (imgType === 'png') {
-    const imgDataUrlList: string[] = await Promise.all(imgBlobs.map(b => readData(b, 'dataUrl')))
+    const imgDataUrlList: string[] = await Promise.all(imgURLs.map(fetchDataURL))

    imgDataUrlList.forEach((data) => {
      pdf.addPage()
@ -52,7 +50,7 @@ const generatePDF = async (imgBlobs: Blob[], imgType: ImgType, width: number, he
      })
    })
  } else { // imgType == "svg"
-    const svgList = await Promise.all(imgBlobs.map(b => readData(b, 'text')))
+    const svgList = await Promise.all(imgURLs.map(fetchText))

    svgList.forEach((svg) => {
      pdf.addPage()
@ -72,16 +70,14 @@ export type PDFWorkerMessage = [string[], ImgType, number, number];

 onmessage = async (e): Promise<void> => {
  const [
-    imgUrls,
+    imgURLs,
    imgType,
    width,
    height,
  ] = e.data as PDFWorkerMessage

-  const imgBlobs = await Promise.all(imgUrls.map(url => fetchBlob(url)))
-
  const pdfBuf = await generatePDF(
-    imgBlobs,
+    imgURLs,
    imgType,
    width,
    height,
--- a/src/wrapper.js
+++ b/src/wrapper.js
@ -1,52 +0,0 @@
-/* eslint-disable */
-const w = typeof unsafeWindow == 'object' ? unsafeWindow : window;
-
-// GM APIs glue
-const _GM = typeof GM == 'object' ? GM : undefined;
-const gmId = '' + Math.random();
-w[gmId] = _GM;
-
-if (_GM && _GM.registerMenuCommand && _GM.openInTab) {
-  // add buttons to the userscript manager menu
-  _GM.registerMenuCommand(
-    `** Version: ${_GM.info.script.version} **`,
-    () => _GM.openInTab("https://github.com/Xmader/musescore-downloader/releases", { active: true })
-  )
-
-  _GM.registerMenuCommand(
-    '** Source Code **',
-    () => _GM.openInTab(_GM.info.script.homepage, { active: true })
-  )
-
-  _GM.registerMenuCommand(
-    '** Discord **',
-    () => _GM.openInTab("https://discord.gg/DKu7cUZ4XQ", { active: true })
-  )
-}
-
-function getRandL () {
-  return String.fromCharCode(97 + Math.floor(Math.random() * 26))
-}
-
-// script loader
-new Promise(resolve => {
-  const id = '' + Math.random();
-  w[id] = resolve;
-
-  const stackN = 9
-  let loaderIntro = ''
-  for (let i = 0; i < stackN; i++) {
-    loaderIntro += `(function ${getRandL()}(){`
-  }
-  const loaderOutro = '})()'.repeat(stackN)
-  const mockUrl = "https://c.amazon-adsystem.com/aax2/apstag.js"
-
-  Function(`${loaderIntro}const d=new Image();window['${id}'](d);delete window['${id}'];document.body.prepend(d)${loaderOutro}//# sourceURL=${mockUrl}`)()
-}).then(d => {
-  d.style.display = 'none';
-  d.src = 'data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==';
-  d.once = false;
-  d.setAttribute('onload', `if(this.once)return;this.once=true;this.remove();const GM=window['${gmId}'];delete window['${gmId}'];(` + function a () {
-  /** script code here */
-
-}.toString() + ')()')})