42 lines
1.0 KiB
JavaScript
42 lines
1.0 KiB
JavaScript
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// @ts-check
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import maybeJsonParse from "../common/maybeJsonParse.js";
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import * as base64url from "../common/base64url.js";
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/**
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* Parse a location hash into `name` and `bytes`.
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* @param {string} hash
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* @returns {null | { name: string, bytes: Uint8Array }} The parsed data, or `null` if the hash can't be parsed.
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*/
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export default (hash) => {
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const normalizedHash = decodeURI(hash.replace(/^#/, ""));
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const parsed = maybeJsonParse(normalizedHash);
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if (!parsed || typeof parsed !== "object") {
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console.warn("Couldn't parse hash as JSON object");
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return null;
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}
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if (
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!("name" in parsed) || (typeof parsed.name !== "string") ||
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!("bytes" in parsed) || (typeof parsed.bytes !== "string")
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) {
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console.warn("Hash fields missing or invalid type");
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return null;
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}
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const { name } = parsed;
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if (!name) {
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console.warn("Name is empty");
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return null;
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}
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const bytes = base64url.parse(parsed.bytes);
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if (!bytes || !bytes.byteLength) {
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console.warn("Bytes is empty");
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return null;
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}
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return { name, bytes };
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};
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