Script to check website status and send email to users if website is down

package.json

@@ -7,6 +7,7 @@
 	"scripts": {
 		"start": "node ./src/bin/www",
 		"start:dev": "nodemon --legacy-watch --inspect=0.0.0.0 ./src/bin/www",
+		"checkWebsiteStatus": "node src/server/services/checkWebsiteStatus.js",
 		"webpack:dev": "webpack watch --color --progress --mode development",
 		"webpack:build": "webpack build --node-env production",
 		"webpack": "webpack build --color --progress --mode development",
@@ -81,6 +82,7 @@
 		"multer": "~1.4.5-lts.1",
 		"ngraph.graph": "~20.0.0",
 		"ngraph.path": "~1.5.0",
+		"node-cron": "~3.0.3",
 		"nodemailer": "~6.9.13",
 		"pg": "~8.12.0",
 		"pg-promise": "~11.8.0",

src/scripts/checkWebsiteStatusCron.bash

@@ -0,0 +1,16 @@
+# This aggregates the readings data at hour level.
+# This should be copied to /etc/ or /etc/cron.hourly/ or /etc/cron.daily and the copy renamed so that its function will be clear to admins.
+
+# Check if a URL is provided as an argument
+if [ -z "$1" ]; then
+    echo "Error: No URL provided. Usage: $0"
+    exit 1
+fi
+
+URL=$1
+
+# The absolute path the project root directory (OED)
+cd '/example/path/to/project/OED'
+
+# The following line should NOT need to be edited except by devs or if you have an old system with only docker-compose.
+docker compose run --rm web npm run --silent checkWebsiteStatus -- $URL &>> /dev/null &

src/server/services/checkWebsiteStatus.js

@@ -0,0 +1,28 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+	const cron = require('node-cron');
+	const { getConnection } = require('../db');
+	const { log } = require('../log');
+	const { logMailer } = require('../logMailer');
+	const LogEmail = require('../models/LogEmail');
+	const WEBSITE_URL = process.argv[2];
+
+	async function checkWebsite() {
+		try {
+			const response = await fetch(WEBSITE_URL, { method: 'HEAD' });
+
+			if (!response.ok) {
+				const errorMessage = `The server at ${WEBSITE_URL} is down.`;
+				// Log the error using Logger class
+				log.error(errorMessage);	
+			}
+		} catch (error) {
+			const errorMessage = `Failed to reach ${WEBSITE_URL}. Error: ${error.message}`;
+	  log.error(errorMessage, error);
+		}
+	}
+
+	checkWebsite();
+