179 lines
9.3 KiB
JavaScript
179 lines
9.3 KiB
JavaScript
// Saves in IndexedDB, world files (export / import) and the blueprint library.
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// ---------- Saves (IndexedDB) ----------
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const DB = {
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db: null,
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open() {
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if (this.db) return Promise.resolve(this.db);
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return new Promise((res, rej) => {
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try {
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const r = indexedDB.open('deepgrain', 1);
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r.onupgradeneeded = () => r.result.createObjectStore('saves');
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r.onsuccess = () => { this.db = r.result; res(this.db); };
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r.onerror = () => rej(r.error);
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} catch (e) { rej(e); }
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});
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},
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async op(mode, fn) {
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const db = await this.open();
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return new Promise((res, rej) => {
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const tx = db.transaction('saves', mode); let rq;
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tx.oncomplete = () => res(rq && rq.result);
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tx.onabort = tx.onerror = () => rej(tx.error || new Error('Storage transaction failed.'));
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try { rq = fn(tx.objectStore('saves')); } catch (e) { tx.abort(); rej(e); }
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});
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},
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put(k, v) { return this.op('readwrite', s => s.put(v, k)); },
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get(k) { return this.op('readonly', s => s.get(k)); },
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del(k) { return this.op('readwrite', s => s.delete(k)); },
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};
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let worldIdTime = 0, worldIdCounter = 0, worldWrites = Promise.resolve();
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function newWorldId() {
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const now = Date.now(); worldIdCounter = now === worldIdTime ? worldIdCounter + 1 : 0; worldIdTime = now;
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return 'w' + now + (worldIdCounter ? '-' + worldIdCounter : '');
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}
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function worldWrite(fn) { const p = worldWrites.then(fn); worldWrites = p.catch(() => {}); return p; }
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async function listWorlds() { return (await DB.get('worlds') || []).sort((a, b) => b.savedAt - a.savedAt); }
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function putWorldEntry(entry) {
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return worldWrite(async () => {
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const list = await listWorlds(), i = list.findIndex(w => w.id === entry.id);
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if (i < 0) list.push(entry); else list[i] = { ...list[i], ...entry };
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await DB.put('worlds', list);
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});
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}
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async function worldNewest(id) {
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const a = await DB.get(`${id}:main`), b = await DB.get(`${id}:auto`);
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const sv = a && b ? (a.savedAt >= b.savedAt ? a : b) : a || b;
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if (!sv) return null;
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const entry = (await listWorlds()).find(w => w.id === id);
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return { ...sv, worldId: id, worldName: entry ? entry.name : 'World' };
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}
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function deleteWorld(id) {
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return worldWrite(async () => {
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const list = (await listWorlds()).filter(w => w.id !== id);
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await DB.op('readwrite', st => { st.delete(`${id}:main`); st.delete(`${id}:auto`); st.put(list, 'worlds'); });
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if (GAME.worldId === id) { GAME.worldId = ''; GAME.worldName = ''; }
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});
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}
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function cleanWorldName(name, fallback) { return String(name).trim().slice(0, 40) || fallback; }
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function renameWorld(id, name) {
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return worldWrite(async () => {
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const list = await listWorlds(), entry = list.find(w => w.id === id);
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if (!entry) return;
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entry.name = cleanWorldName(name, entry.name);
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await DB.put('worlds', list);
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if (GAME.worldId === id) GAME.worldName = entry.name;
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});
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}
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async function migrateWorlds() {
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try {
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if (await DB.get('worlds') !== undefined) return;
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const a = await DB.get('main'), b = await DB.get('auto'), sv = a && b ? (a.savedAt >= b.savedAt ? a : b) : a || b;
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if (!sv) return;
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const id = newWorldId();
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await DB.op('readwrite', st => { if (a) st.put(a, `${id}:main`); if (b) st.put(b, `${id}:auto`); });
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// Verify every byte before retiring the only old copies.
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for (const [slot, old] of [['main', a], ['auto', b]]) if (old) {
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const copy = await DB.get(`${id}:${slot}`);
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if (!copy || JSON.stringify(copy.meta) !== JSON.stringify(old.meta) || copy.savedAt !== old.savedAt || copy.playTime !== old.playTime) throw new Error('Save copy failed.');
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for (const k in old.buffers) {
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const x = old.buffers[k], y = copy.buffers[k];
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if (!y || x.constructor !== y.constructor || x.length !== y.length || !x.every((v, i) => v === y[i])) throw new Error('Save copy failed.');
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}
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}
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await DB.op('readwrite', st => {
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st.put([{ id, name: 'World 1', seed: sv.meta.seed, w: sv.meta.W, h: sv.meta.H, createdAt: sv.savedAt, savedAt: sv.savedAt, playTime: sv.playTime || 0 }], 'worlds');
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st.delete('main'); st.delete('auto');
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});
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} catch (e) { toast('Could not move the old save. It has been kept. Reload to try again.'); throw e; }
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}
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async function saveWorld(slot, quiet) {
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try {
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const s = serializeWorld(), savedAt = Date.now(), playTime = GAME.playTime;
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if (!GAME.worldId) { GAME.worldId = newWorldId(); GAME.worldName = `World ${(await listWorlds()).length + 1}`; }
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const id = GAME.worldId, name = GAME.worldName;
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await worldWrite(async () => {
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const list = await listWorlds();
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let entry = list.find(w => w.id === id);
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if (!entry) { entry = { id, name, createdAt: savedAt }; list.push(entry); }
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Object.assign(entry, { savedAt, playTime, seed: s.meta.seed, w: s.meta.W, h: s.meta.H });
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await DB.op('readwrite', st => { st.put({ meta: s.meta, buffers: s.buffers, savedAt, playTime }, `${id}:${slot}`); st.put(list, 'worlds'); });
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});
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if (!quiet) toast(slot === 'auto' ? 'Autosaved.' : 'World saved.');
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return true;
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} catch (e) {
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if (!quiet) toast('Could not save. Browser storage is unavailable in this view. Use Export world file instead.');
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return false;
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}
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}
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async function newestSave() {
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try { for (const entry of await listWorlds()) { const sv = await worldNewest(entry.id); if (sv) return sv; } return null; }
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catch (e) { return null; }
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}
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function b64FromBytes(u8) { let s = ''; const CH = 0x8000; for (let i = 0; i < u8.length; i += CH) s += String.fromCharCode.apply(null, u8.subarray(i, i + CH)); return btoa(s); }
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function bytesFromB64(b64) { const s = atob(b64); const u8 = new Uint8Array(s.length); for (let i = 0; i < s.length; i++) u8[i] = s.charCodeAt(i); return u8; }
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async function gz(u8, inflate) {
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if (typeof CompressionStream === 'undefined') return null;
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const st = new Blob([u8]).stream().pipeThrough(inflate ? new DecompressionStream('gzip') : new CompressionStream('gzip'));
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return new Uint8Array(await new Response(st).arrayBuffer());
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}
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async function exportWorld() {
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const s = serializeWorld();
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const out = { format: 'deepgrain-world', v: 1, meta: s.meta, buffers: {} };
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for (const k in s.buffers) {
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const arr = s.buffers[k], bytes = new Uint8Array(arr.buffer, arr.byteOffset, arr.byteLength);
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const z = await gz(bytes, false);
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out.buffers[k] = { type: arr.constructor.name, gz: !!z, b64: b64FromBytes(z || bytes) };
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}
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const text = JSON.stringify(out);
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let dl = null;
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try { dl = window.claude && window.claude.use ? await window.claude.use('downloads') : null; } catch (e) { dl = null; }
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if (!dl) {
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// an ordinary browser download (the downloads hook above only exists inside claude.ai)
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try {
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const url = URL.createObjectURL(new Blob([text], { type: 'application/json' }));
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const a = document.createElement('a');
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a.href = url; a.download = `deepgrain-${worldSeed}.json`;
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document.body.appendChild(a); a.click(); a.remove();
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setTimeout(() => URL.revokeObjectURL(url), 60000);
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toast('World file saved.');
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} catch (e) { toast('Saving files is not available in this view.'); }
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return;
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}
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try { await dl.save({ filename: `deepgrain-${worldSeed}.json`, data: new Blob([text], { type: 'application/json' }) }); toast('World file saved.'); }
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catch (e) { if (e && e.code !== 'declined') toast('The world file was not saved.'); }
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}
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async function importWorldFile(file) {
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try {
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const obj = JSON.parse(await file.text());
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if (obj.format !== 'deepgrain-world') throw new Error('Not a Deepgrain world file.');
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const bufs = {};
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const T = { Uint8Array, Uint16Array, Int16Array, Float32Array, Int32Array };
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for (const k in obj.buffers) {
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const b = obj.buffers[k]; let bytes = bytesFromB64(b.b64);
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if (b.gz) bytes = await gz(bytes, true);
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const C = T[b.type] || Uint8Array;
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bufs[k] = new C(bytes.buffer, bytes.byteOffset, bytes.byteLength / C.BYTES_PER_ELEMENT);
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}
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const id = newWorldId(), name = `Imported ${obj.meta.seed}`.slice(0, 40);
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if (!startFromSave({ meta: obj.meta, buffers: bufs, worldId: id, worldName: name })) return;
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if (!await saveWorld('auto')) return;
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toast('World imported.');
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} catch (e) { toast('That file could not be loaded: ' + (e.message || 'unknown error')); }
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}
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// ---------- Blueprint library ----------
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function libLoad() { try { return JSON.parse(localStorage.getItem('deepgrain.blueprints') || '[]'); } catch (e) { return []; } }
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function libSave(list) { try { localStorage.setItem('deepgrain.blueprints', JSON.stringify(list)); return true; } catch (e) { toast('Blueprints cannot be stored in this view. Copy the blueprint code instead.'); return false; } }
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function bpEncode(bp) { return 'DGBP2:' + btoa(unescape(encodeURIComponent(JSON.stringify(bp)))); }
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function bpValid(bp) { return !!(bp && bp.v === 2 && Array.isArray(bp.blocks) && bp.bw > 0 && bp.bh > 0); }
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function bpDecode(code) {
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const s = code.trim();
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if (s.startsWith('DGBP1:')) throw new Error('That blueprint is from an older version of the game, before the block grid. It cannot be used.');
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if (!s.startsWith('DGBP2:')) throw new Error('Blueprint codes start with DGBP2:');
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let bp;
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try { bp = JSON.parse(decodeURIComponent(escape(atob(s.slice(6))))); } catch (e) { throw new Error('That code is damaged.'); }
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if (!bpValid(bp)) throw new Error('That code is damaged.');
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bp.machines = bp.machines || []; bp.molds = bp.molds || [];
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return bp;
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}
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