add a utils file for notifications

server/service/notificationUtils.js

@@ -0,0 +1,146 @@
+class NotificationUtils {
+	constructor({ stringService, emailService }) {
+		this.stringService = stringService;
+		this.emailService = emailService;
+	}
+
+	buildTestEmail = async () => {
+		const context = { testName: "Monitoring System" };
+		const html = await this.emailService.buildEmail("testEmailTemplate", context);
+		return html;
+	};
+
+	buildStatusEmail = async (networkResponse) => {
+		const { monitor, status, prevStatus } = networkResponse;
+		const template = prevStatus === false ? "serverIsUpTemplate" : "serverIsDownTemplate";
+		const context = { monitor: monitor.name, url: monitor.url };
+		const subject = `Monitor ${monitor.name} is ${status === true ? "up" : "down"}`;
+		const html = await this.emailService.buildEmail(template, context);
+		return { subject, html };
+	};
+
+	buildWebhookMessage = (networkResponse) => {
+		const { monitor, status, code, timestamp } = networkResponse;
+		// Format timestamp using the local system timezone
+		const formatTime = (timestamp) => {
+			const date = new Date(timestamp);
+
+			// Get timezone abbreviation and format the date
+			const timeZoneAbbr = date
+				.toLocaleTimeString("en-US", { timeZoneName: "short" })
+				.split(" ")
+				.pop();
+
+			// Format the date with readable format
+			return (
+				date
+					.toLocaleString("en-US", {
+						year: "numeric",
+						month: "2-digit",
+						day: "2-digit",
+						hour: "2-digit",
+						minute: "2-digit",
+						second: "2-digit",
+						hour12: false,
+					})
+					.replace(/(\d+)\/(\d+)\/(\d+),\s/, "$3-$1-$2 ") +
+				" " +
+				timeZoneAbbr
+			);
+		};
+
+		// Get formatted time
+		const formattedTime = timestamp
+			? formatTime(timestamp)
+			: formatTime(new Date().getTime());
+
+		// Create different messages based on status with extra spacing
+		let messageText;
+		if (status === true) {
+			messageText = this.stringService.monitorUpAlert
+				.replace("{monitorName}", monitor.name)
+				.replace("{time}", formattedTime)
+				.replace("{code}", code || "Unknown");
+		} else {
+			messageText = this.stringService.monitorDownAlert
+				.replace("{monitorName}", monitor.name)
+				.replace("{time}", formattedTime)
+				.replace("{code}", code || "Unknown");
+		}
+		return messageText;
+	};
+
+	buildHardwareAlerts = async (networkResponse) => {
+		const monitor = networkResponse?.monitor;
+		const thresholds = networkResponse?.monitor?.thresholds;
+		const {
+			usage_cpu: cpuThreshold = -1,
+			usage_memory: memoryThreshold = -1,
+			usage_disk: diskThreshold = -1,
+		} = thresholds;
+
+		const metrics = networkResponse?.payload?.data;
+		const {
+			cpu: { usage_percent: cpuUsage = -1 } = {},
+			memory: { usage_percent: memoryUsage = -1 } = {},
+			disk = [],
+		} = metrics;
+
+		const alerts = {
+			cpu: cpuThreshold !== -1 && cpuUsage > cpuThreshold ? true : false,
+			memory: memoryThreshold !== -1 && memoryUsage > memoryThreshold ? true : false,
+			disk:
+				disk?.some(
+					(d) =>
+						diskThreshold !== -1 &&
+						typeof d?.usage_percent === "number" &&
+						d?.usage_percent > diskThreshold
+				) ?? false,
+		};
+
+		const alertsToSend = [];
+		const alertTypes = ["cpu", "memory", "disk"];
+		for (const type of alertTypes) {
+			// Iterate over each alert type to see if any need to be decremented
+			if (alerts[type] === true) {
+				monitor[`${type}AlertThreshold`]--; // Decrement threshold if an alert is triggered
+
+				if (monitor[`${type}AlertThreshold`] <= 0) {
+					// If threshold drops below 0, reset and send notification
+					monitor[`${type}AlertThreshold`] = monitor.alertThreshold;
+
+					const formatAlert = {
+						cpu: () =>
+							`Your current CPU usage (${(cpuUsage * 100).toFixed(0)}%) is above your threshold (${(cpuThreshold * 100).toFixed(0)}%)`,
+						memory: () =>
+							`Your current memory usage (${(memoryUsage * 100).toFixed(0)}%) is above your threshold (${(memoryThreshold * 100).toFixed(0)}%)`,
+						disk: () =>
+							`Your current disk usage: ${disk
+								.map((d, idx) => `(Disk${idx}: ${(d.usage_percent * 100).toFixed(0)}%)`)
+								.join(
+									", "
+								)} is above your threshold (${(diskThreshold * 100).toFixed(0)}%)`,
+					};
+					alertsToSend.push(formatAlert[type]());
+				}
+			}
+		}
+		await monitor.save();
+		return alertsToSend;
+	};
+
+	buildHardwareEmail = async (networkResponse, alerts) => {
+		const { monitor } = networkResponse;
+		const template = "hardwareIncidentTemplate";
+		const context = { monitor: monitor.name, url: monitor.url, alerts };
+		const subject = `Monitor ${monitor.name} infrastructure alerts`;
+		const html = await this.emailService.buildEmail(template, context);
+		return { subject, html };
+	};
+
+	buildHardwareNotificationMessage = (alerts) => {
+		return alerts.map((alert) => alert).join("\n");
+	};
+}
+
+export default NotificationUtils;