feat: sse events

apps/server/src/modules/events/events.controller.ts

@@ -0,0 +1,81 @@
+import { Hono } from "hono";
+import { streamSSE } from "hono/streaming";
+import { logger } from "../../utils/logger";
+import { serverEvents } from "../../core/events";
+
+export const eventsController = new Hono().get("/", (c) => {
+	logger.info("Client connected to SSE endpoint");
+
+	return streamSSE(c, async (stream) => {
+		await stream.writeSSE({
+			data: JSON.stringify({ type: "connected", timestamp: Date.now() }),
+			event: "connected",
+		});
+
+		const onBackupStarted = (data: { scheduleId: number; volumeName: string; repositoryName: string }) => {
+			stream.writeSSE({
+				data: JSON.stringify(data),
+				event: "backup:started",
+			});
+		};
+
+		const onBackupCompleted = (data: {
+			scheduleId: number;
+			volumeName: string;
+			repositoryName: string;
+			status: "success" | "error";
+		}) => {
+			stream.writeSSE({
+				data: JSON.stringify(data),
+				event: "backup:completed",
+			});
+		};
+
+		const onVolumeMounted = (data: { volumeName: string }) => {
+			stream.writeSSE({
+				data: JSON.stringify(data),
+				event: "volume:mounted",
+			});
+		};
+
+		const onVolumeUnmounted = (data: { volumeName: string }) => {
+			stream.writeSSE({
+				data: JSON.stringify(data),
+				event: "volume:unmounted",
+			});
+		};
+
+		const onVolumeUpdated = (data: { volumeName: string }) => {
+			stream.writeSSE({
+				data: JSON.stringify(data),
+				event: "volume:updated",
+			});
+		};
+
+		serverEvents.on("backup:started", onBackupStarted);
+		serverEvents.on("backup:completed", onBackupCompleted);
+		serverEvents.on("volume:mounted", onVolumeMounted);
+		serverEvents.on("volume:unmounted", onVolumeUnmounted);
+		serverEvents.on("volume:updated", onVolumeUpdated);
+
+		let keepAlive = true;
+
+		stream.onAbort(() => {
+			logger.info("Client disconnected from SSE endpoint");
+			keepAlive = false;
+			serverEvents.off("backup:started", onBackupStarted);
+			serverEvents.off("backup:completed", onBackupCompleted);
+			serverEvents.off("volume:mounted", onVolumeMounted);
+			serverEvents.off("volume:unmounted", onVolumeUnmounted);
+			serverEvents.off("volume:updated", onVolumeUpdated);
+		});
+
+		while (keepAlive) {
+			await stream.writeSSE({
+				data: JSON.stringify({ timestamp: Date.now() }),
+				event: "heartbeat",
+			});
+			await stream.sleep(30000);
+		}
+	});
+});