Integrate worker to offload main thread from heavy tasks

wwwroot/core/namecards/workerLauncher.js

@@ -0,0 +1,31 @@
+import path from "path";
+import { Worker } from 'worker_threads';
+import {Logger} from "../logging/logger.js";
+
+function launchWorker({templatePath, avatarURL, username}) {
+    return new Promise((resolve, reject) => {
+        const workerFile = path.resolve('./wwwroot/core/namecards/nameCardWorker.js');
+        const worker = new Worker(workerFile);
+
+        worker.postMessage({templatePath, avatarURL, username});
+
+        worker.on('message', (result) => {
+            resolve(result);
+            worker.terminate()
+                .catch(err => Logger.error("Unable to terminate worker", err.message));
+        });
+
+        worker.on('error', (err) => {
+            reject(err);
+            worker.terminate()
+                .catch(err => Logger.error("Unable to terminate worker", err.message));
+        });
+
+        worker.on('exit', (code) => {
+            if (code !== 0) reject(new Error(`Worker stopped with code ${code}`));
+        });
+    });
+}
+
+export {launchWorker}
+