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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/[email protected]/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); }; })();
