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Scratchのファイルサイズの5MB制限を突破する
// ==UserScript==
// @name Scratch Hammer
// @namespace https://scratch.mit.edu/
// @version 20240602
// @description Scratchのファイルサイズの5MB制限を突破する
// @author Yukkku
// @match https://scratch.mit.edu/projects/*
// @grant none
// @require https://unpkg.com/jszip@3.10.1/dist/jszip.min.js
// @license MIT
// ==/UserScript==
// @ts-check
(() => {
'use strict';
/**
* project.jsonの中身を削減する
* @param {string} json
* @returns string
*/
const compress = (json) => {
/**
* uuidを`n`個生成する
* @param {number} n
* @returns {string[]}
*/
const makeUids = n => {
const soup = '!#%()*+,-./:;=?@[]^_`{|}~ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
/** @type {(i: number) => string} */
const id = i => i === 0 ? '' : id(Math.floor((i - 1) / soup.length)) + soup[(i - 1) % soup.length];
/** @type {string[]} */
let r = [];
for (let i = 1; r.length < n; i++) {
let f = id(i);
// オブジェクトのプロパティの順序について, 非負整数だけ例外なのでそれを除外
if (!/^(0|[1-9][0-9]*)$/.exec(f)) r.push(f);
}
return r;
};
/**
* オブジェクトが空か判定する
* @param {any} v
* @returns {boolean}
*/
const isEmpty = v => {
for (const _ in v) return false;
return true;
};
const knownExtentions = new Set(['motion', 'looks', 'sound', 'event', 'control', 'sensing', 'operator', 'data']);
// 自動で型変換がされるので短くなるように数値に変えていい型
const nocast = {
looks_sayforsecs: ['MESSAGE'],
looks_say: ['MESSAGE'],
looks_thinkforsecs: ['MESSAGE'],
looks_think: ['MESSAGE'],
looks_switchcostumeto: ['COSTUME'],
looks_switchbackdropto: ['BACKDROP'],
looks_switchbackdroptoandwait: ['BACKDROP'],
sound_play: ['SOUND_MENU'],
sound_playuntildone: ['SOUND_MENU'],
sensing_keypressed: ['KEY_OPTION'],
data_setvariableto: ['VALUE'],
data_addtolist: ['ITEM'],
data_insertatlist: ['ITEM'],
data_replaceitemoflist: ['ITEM'],
};
const val = JSON.parse(json);
delete val.meta.vm;
delete val.meta.agent;
for (const target of val.targets) {
// 不要な諸々を消す
if (target.tempo === 60) delete target.tempo;
if (target.volume === 100) delete target.volume;
if (target.videoTransparency === 50) delete target.videoTransparency;
if (target.videoState === 'on') delete target.videoState;
if (target.textToSpeechLanguage === 'null') delete target.textToSpeechLanguage;
if (isEmpty(target.lists)) delete target.lists;
if (isEmpty(target.broadcasts)) delete target.broadcasts;
if (isEmpty(target.comments)) delete target.comments;
if (target.x === 0) delete target.x;
if (target.y === 0) delete target.y;
if (target.direction === 90) delete target.direction;
if (target.size === 100) delete target.size;
if (target.visible === true) delete target.visible;
if (target.currentCostume === 0) delete target.currentCostume;
if (target.rotationStyle === 'all around') delete target.rotationStyle;
if (target.draggable === false) delete target.draggable;
for (const costume of target.costumes)
if (costume.md5ext === `${costume.assetId}.${costume.dataFormat}`) delete costume.md5ext;
for (const blockId in target.blocks) {
const block = target.blocks[blockId];
if (Array.isArray(block)) continue;
if (isEmpty(block.inputs)) delete block.inputs;
if (isEmpty(block.fields)) delete block.fields;
if (knownExtentions.has(block.opcode.split('_')[0]))
for (const inputName in block.inputs) {
if (nocast[block.opcode]?.has?.(inputName)) continue;
const input = block.inputs[inputName];
for (let i = 1; i < input.length; i++) {
if (typeof input[i] === 'string' || input[i] == null) continue;
if (![4, 5, 6, 7, 8, 10].includes(input[i][0])) continue;
const v = JSON.parse(JSON.stringify(Number(input[i][1])));
if (typeof v === 'number' && String(v) === input[i][1]) input[i][1] = v;
}
}
}
// BlockIdを短く貼りかえる
/** @type {Map<string, string>} */
const mp = new Map();
{
const ids = Object.keys(target.blocks);
const uids = makeUids(Object.keys(target.blocks).length);
for (let i = 0; i < ids.length; i++) mp.set(ids[i], uids[i]);
}
const nb = Object.create(null);
for (const blockId in target.blocks) {
const block = target.blocks[blockId];
nb[mp.get(blockId) ?? blockId] = block;
if (Array.isArray(block)) continue;
if (isEmpty(block.inputs)) delete block.inputs;
if (isEmpty(block.fields)) delete block.fields;
if (typeof block.next === 'string') block.next = mp.get(block.next) ?? block.next;
if (typeof block.parent === 'string') block.parent = mp.get(block.parent) ?? block.parent;
for (const inputName in block.inputs) {
const input = block.inputs[inputName];
for (let i = 1; i < input.length; i++)
if (typeof input[i] === 'string') input[i] = mp.get(input[i]) ?? input[i];
}
}
for (const commentId in target.comments) {
const comment = target.comments[commentId];
if (typeof comment.blockId === 'string') comment.blockId = mp.get(comment.blockId) ?? comment.blockId;
}
target.blocks = nb;
}
return JSON.stringify(val);
};
// sendメソッド自体を書き換えてやって, プロジェクトの情報を送ろうとしている時だけ処理を変える
XMLHttpRequest.prototype._send = XMLHttpRequest.prototype.send;
XMLHttpRequest.prototype.send = async function (...data) {
let zip;
try {
if (data.length === 1
&& this.method === 'put'
&& new URL(this.url).origin === 'https://projects.scratch.mit.edu'
) {
zip = new JSZip();
zip.file('project.json', compress(data[0]).replaceAll('\\b', '\\u\\b0008'));
zip = await zip.generateAsync({ type: 'uint8array', compression: 'DEFLATE' });
} else {
throw 0;
}
} catch (_) {
this._send(...data);
return;
}
this.setRequestHeader('Content-Type', 'application/zip');
this._send(zip);
};
})();