@aikidosec/firewall/agent/realtime/pollForChanges.js

Zen by Aikido is an embedded Application Firewall that autonomously protects Node.js apps against common and critical attacks, provides rate limiting, detects malicious traffic (including bots), and more.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.pollForChanges = pollForChanges;
const getConfig_1 = require("./getConfig");
const getConfigLastUpdatedAt_1 = require("./getConfigLastUpdatedAt");
let interval = null;
let currentLastUpdatedAt = null;
function pollForChanges({ onConfigUpdate, token, logger, lastUpdatedAt, }) {
    if (!token) {
        logger.log("No token provided, not polling for config updates");
        return;
    }
    currentLastUpdatedAt = lastUpdatedAt;
    if (interval) {
        clearInterval(interval);
    }
    interval = setInterval(() => {
        check(token, onConfigUpdate).catch((error) => {
            logger.log(`Failed to check for config updates: ${error.message}`);
        });
    }, 60 * 1000);
    interval.unref();
}
async function check(token, onConfigUpdate) {
    const configLastUpdatedAt = await (0, getConfigLastUpdatedAt_1.getConfigLastUpdatedAt)(token);
    if (typeof currentLastUpdatedAt === "number" &&
        configLastUpdatedAt > currentLastUpdatedAt) {
        const config = await (0, getConfig_1.getConfig)(token);
        currentLastUpdatedAt = config.configUpdatedAt;
        onConfigUpdate(config);
    }
}