feat: add cron support

bin/index.js

@@ -1,23 +1,47 @@
 /* eslint no-global-assign: 0 no-console: 0 */
 require = require('esm')(module);
 const getopts = require('getopts');
+const cron = require('node-cron');
 const mod = require('../src/index.mjs').default;
+const logger = require('../src/lib/logger.mjs').default;
 
-const { index, ...elasticsearch } = getopts(process.argv.slice(2), {
+const { index, interval, ...elasticsearch } = getopts(process.argv.slice(2), {
   string: ['host', 'log'],
   alias: {
     h: 'host',
     l: 'log',
     i: 'index',
+    t: 'interval',
   },
   default: {
     host: 'localhost:9200',
     log: 'error',
     index: 'adsb-data',
+    interval: 0,
   },
 });
 
-mod(index, { elasticsearch }).catch(err => {
+function handleError(err) {
   console.error(err);
   process.exit(1);
+}
+
+async function fetchAndIndex() {
+  return mod(index, { elasticsearch });
+}
+
+async function run() {
+  // initial kickoff
+  await fetchAndIndex().catch(handleError);
+
+  if (interval === 0) return;
+
+  // scheduled running
+  logger.debug(`Starting cron (${interval}s)...`);
+  cron.schedule(`${interval} * * * * *`, () => {
+    logger.debug('Running cron...');
+    fetchAndIndex();
   });
+}
+
+run().catch(handleError);

src/lib/data-source.mjs

@@ -17,6 +17,7 @@ function getIndexName(index) {
 
 export async function createIndex(client, index) {
   const realIndex = getIndexName(index);
+
   return client.indices
     .create({
       index: realIndex,