wip exception handler

src/main.ts

@@ -2,6 +2,7 @@ import { ValidationPipe } from '@nestjs/common';
 import { NestFactory } from '@nestjs/core';
 import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
 import { AppModule } from './app.module';
+import { MailerService } from './mailer/mailer.service';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule, {
@@ -9,6 +10,44 @@ async function bootstrap() {
       process.env.NODE_ENV === 'production' ? ['error', 'warn', 'log'] : ['log', 'debug', 'error', 'verbose', 'warn'],
   });
   app.useGlobalPipes(new ValidationPipe());
+
+  //const exceptionService = app.get(ExceptionService);
+  /*
+  const mailerService = app.get(MailerService);
+  process.on('uncaughtException', async (err) => {
+    //exceptionService.handleUncaughtException(err);
+    console.log('Uncaught Exception:', err);
+    try {
+      await mailerService.send(
+        'to_complete@xxx.com',
+        'Uncaught Exception in NestJS Application',
+        `An uncaught exception occurred: <br />${err.name} : ${err.message}<br />${err.stack}`
+      );
+    } catch (e) {
+      console.log('Uncaught Exception process failed:', e);
+    }
+
+    // Exit the application on an uncaught exception to maintain stability and facilitate debugging
+    process.exit(1);
+  });
+
+  process.on('unhandledRejection', async (reason, promise) => {
+    console.log('Unhandled rejection at ', promise, `reason: ${reason}`);
+    try {
+      await mailerService.send(
+        'to_complete@xxx.com',
+        'Unhandled rejection in NestJS Application',
+        `An unhandled rejection occurred: <br />${JSON.stringify(promise)}<br />reason: ${reason}`
+      );
+    } catch (e) {
+      console.log('Unhandled rejection process failed:', e);
+    }
+
+    // Exit the application on an unhandled rejection to maintain stability and facilitate debugging
+    process.exit(1);
+  });
+  */
+
   const options = new DocumentBuilder()
     .setTitle(`Res'in`)
     .setDescription(`Res'in API documentation`)
@@ -18,6 +57,7 @@ async function bootstrap() {
   app.setGlobalPrefix('api');
   const document = SwaggerModule.createDocument(app, options);
   SwaggerModule.setup('api/doc', app, document);
+
   await app.listen(3000);
 }
 bootstrap();

src/shared/exception.service.ts

+import { Injectable } from '@nestjs/common';
+import { MailerService } from '../mailer/mailer.service';
+
+@Injectable()
+export class ExceptionService {
+  constructor(private readonly mailerService: MailerService) {}
+
+  handleUncaughtException(err: Error) {
+    console.log('Uncaught Exception :', err);
+
+    this.mailerService.send(
+      'eloupias@grandlyon.com',
+      'Uncaught Exception in NestJS Application',
+      `An uncaught exception occurred: ${JSON.stringify(err)}`
+    );
+  }
+
+  handleUnhandledRejection(reason: any) {
+    console.log('Unhandled Rejection:', reason);
+
+    this.mailerService.send(
+      'eloupias@grandlyon.com',
+      'Unhandled Promise Rejection in NestJS Application',
+      `An unhandled promise rejection occurred: ${reason}`
+    );
+  }
+}