47 lines
1 KiB
JavaScript
47 lines
1 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 Edition = 1;
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class Cache {
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constructor() {
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this.gfSource = {};
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this.gfSink = {};
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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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this.gfSource = rep.gf || {};
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}
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toRep(version) {
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return { version: version + "@" + Edition, gf: this.gfSink };
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}
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// Geometry flattening conversion cache
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getGF(ck) {
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return this.gfSource[ck];
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}
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saveGF(ck, val) {
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this.gfSink[ck] = val;
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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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cache.loadRep(argv.menu.version, unzip(await fs.readFile(argv.oCache)));
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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) await fs.writeFile(argv.oCache, zip(cache.toRep(argv.menu.version)));
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};
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function unzip(buf) {
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return JSON.parse(zlib.gunzipSync(buf));
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}
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function zip(obj) {
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return zlib.gzipSync(Buffer.from(JSON.stringify(obj), "utf-8"));
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}
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