Handle error calls

src/pushMonitor.ts

@@ -1,4 +1,4 @@
-import sendHeartbeat from "./requestHandler";
+import { sendHeartbeat, sendShutdownNotification } from "./requestHandler";
 
 /**
  * Defines an uptime kuma monitor
@@ -118,6 +118,16 @@ export class PushMonitor {
         return this;
     }
 
+    /**
+     * Enables the sending of shutdown down notifications
+     * !! This will overwrite the uncaughtException handler function !!
+     * @returns This instance
+     */
+    public enableShutdownNotifications(): this {
+        this.initEventHandlers();
+        return this;
+    }
+
     /**
      * Initializes the timer
      * @private
@@ -136,4 +146,31 @@ export class PushMonitor {
             });
         }, 1000);
     }
+
+    /**
+     * Initializes event handlers
+     * @private
+     */
+    private initEventHandlers() {
+        process.on("uncaughtException", async (err, origin) => {
+            console.error(origin + "\n" + err.stack);
+            await this.sendShutdownNotification(`Uncaught Exception (${err.message})`);
+            process.exitCode = 1;
+            process.exit(1);
+        });
+    }
+
+    /**
+     * Sends a shutdown notification to all monitors
+     * @param msg The message to send
+     */
+    private async sendShutdownNotification(msg: string = "Shutdown") {
+        const promises: Promise<void>[] = [];
+
+        this._monitors.forEach((monitor) => {
+            promises.push(sendShutdownNotification(monitor.monitor.url, msg, this._debug));
+        });
+
+        return Promise.all(promises);
+    }
 }