66 lines
1.5 KiB
JavaScript
66 lines
1.5 KiB
JavaScript
"use strict";
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const fs = require("fs-extra");
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const zlib = require("zlib");
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const { encode, decode } = require("@msgpack/msgpack");
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const Edition = 3;
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const MAX_AGE = 5;
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class GfEntry {
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constructor(age, value) {
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this.age = age;
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this.value = value;
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}
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}
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class Cache {
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constructor() {
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this.gf = new Map();
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}
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loadRep(version, rep) {
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if (!rep || rep.version !== version + "@" + Edition) return;
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for (const [k, e] of Object.entries(rep.gf)) {
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this.gf.set(k, new GfEntry((e.age || 0) + 1, e.value));
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}
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}
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toRep(version) {
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let gfRep = {};
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for (const [k, e] of this.gf) {
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if (e.age < MAX_AGE) gfRep[k] = { age: e.age, value: e.value };
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}
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return { version: version + "@" + Edition, gf: gfRep };
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}
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// Geometry flattening conversion cache
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getGF(k) {
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const entry = this.gf.get(k);
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if (!entry) return undefined;
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else return entry.value;
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}
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refreshGF(k) {
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const entry = this.gf.get(k);
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if (!entry) return;
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entry.age = 0;
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}
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saveGF(k, v) {
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this.gf.set(k, new GfEntry(0, v));
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}
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}
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exports.load = async function (argv) {
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let cache = new Cache();
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if (argv.oCache && fs.existsSync(argv.oCache)) {
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const buf = zlib.gunzipSync(await fs.readFile(argv.oCache));
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cache.loadRep(argv.menu.version, decode(buf));
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}
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return cache;
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};
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exports.save = async function savePTCache(argv, cache) {
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if (argv.oCache) {
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const buf = encode(cache.toRep(argv.menu.version));
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const bufZip = zlib.gzipSync(Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength));
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await fs.writeFile(argv.oCache, bufZip);
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}
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};
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