@dvsa/appdev-api-common/utils/compression.js

Utils library for common API functionality

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.DataCompression = void 0;
const node_zlib_1 = require("node:zlib");
// biome-ignore lint/complexity/noStaticOnlyClass: Valid use case for a static class
class DataCompression {
    /**
     * Extracts a compressed (in base64) string using gunzip into a JSON object
     * @template T
     * @param {string} compressedData
     * @returns {T}
     */
    static decompress(compressedData) {
        const gzippedBytes = Buffer.from(compressedData, "base64");
        const unzippedJson = (0, node_zlib_1.gunzipSync)(gzippedBytes).toString();
        return JSON.parse(unzippedJson);
    }
    /**
     * Compresses (with gzip) a JSON object into a base64 string
     * @template T
     * @param {T} data
     * @returns {string}
     */
    static compress(data) {
        const jsonString = JSON.stringify(data);
        const gzippedData = (0, node_zlib_1.gzipSync)(Buffer.from(jsonString));
        return gzippedData.toString("base64");
    }
}
exports.DataCompression = DataCompression;