Function capCheckpoint

checkpoints/express/index.js:7–159

(userOptions)

import Cap from "@cap.js/server";

export const capCheckpoint = (userOptions) => {
	const options = {
		token_validity_hours: 32,
		tokens_store_path: ".data/middlewareTokens.json",
		token_size: 16,
		verification_template_path: join(
			dirname(fileURLToPath(import.meta.url)),
			"./index.html",
		),
		...userOptions,
	};

	const cap = new Cap({
		noFSState: true,
	});

	let tokensCache = null;
	let cacheLastModified = 0;

	fs.mkdir(dirname(options.tokens_store_path), { recursive: true });

	async function loadCustomTokens() {
		try {
			const stats = await fs.stat(options.tokens_store_path);

			if (tokensCache && stats.mtime.getTime() <= cacheLastModified) {
				return tokensCache;
			}

			tokensCache = JSON.parse(
				await fs.readFile(options.tokens_store_path, "utf-8"),
			);
			cacheLastModified = Date.now();

			return tokensCache;
		} catch {
			tokensCache = {};
			cacheLastModified = Date.now();

			return tokensCache;
		}
	}

	async function saveCustomTokens(tokens) {
		await fs.writeFile(options.tokens_store_path, JSON.stringify(tokens));
		tokensCache = tokens;
		cacheLastModified = Date.now();
	}

	async function storeCustomToken(token) {
		const tokens = await loadCustomTokens();

		tokens[token] = Date.now() + options.token_validity_hours * 60 * 60 * 1000;
		await saveCustomTokens(tokens);
		return token;
	}

	async function validateCustomToken(token) {