forked from olcxjas-softworks/LarpixClient
40 lines
1.3 KiB
JavaScript
40 lines
1.3 KiB
JavaScript
import { toUint8Array } from "../bytes/index.js";
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import { encode as encodeBinary, decode as decodeBinary } from "./binary.js";
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const BASE64_REGEX = /^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$/;
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function nodeBuffer() {
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return globalThis.Buffer;
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}
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export function normalize(text) {
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return text.replace(/[\n\r\t ]/g, "");
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}
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export function pad(text) {
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const remainder = text.length % 4;
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return remainder ? text + "=".repeat(4 - remainder) : text;
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}
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export function is(text) {
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if (typeof text !== "string") {
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return false;
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}
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const normalized = normalize(text);
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return normalized === "" || BASE64_REGEX.test(normalized);
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}
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export function encode(data, _options) {
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const bytes = toUint8Array(data);
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const buffer = nodeBuffer();
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if (buffer) {
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return buffer.from(bytes).toString("base64");
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}
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return btoa(encodeBinary(bytes));
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}
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export function decode(text, _options) {
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const normalized = normalize(text);
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if (!is(normalized)) {
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throw new TypeError("Input is not valid Base64 text");
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}
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const buffer = nodeBuffer();
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if (buffer) {
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return new Uint8Array(buffer.from(normalized, "base64"));
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}
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return decodeBinary(atob(normalized));
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}
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export const base64 = { encode, decode, is, normalize, pad };
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