fix: mailer module init issue

packages/hoppscotch-backend/src/admin/admin.module.ts

@@ -4,7 +4,6 @@ import { AdminService } from './admin.service';
 import { PrismaModule } from '../prisma/prisma.module';
 import { PubSubModule } from '../pubsub/pubsub.module';
 import { UserModule } from '../user/user.module';
-import { MailerModule } from '../mailer/mailer.module';
 import { TeamModule } from '../team/team.module';
 import { TeamInvitationModule } from '../team-invitation/team-invitation.module';
 import { TeamEnvironmentsModule } from '../team-environments/team-environments.module';
@@ -19,7 +18,6 @@ import { InfraConfigModule } from 'src/infra-config/infra-config.module';
     PrismaModule,
     PubSubModule,
     UserModule,
-    MailerModule,
     TeamModule,
     TeamInvitationModule,
     TeamEnvironmentsModule,

packages/hoppscotch-backend/src/app.module.ts

@@ -23,6 +23,7 @@ import { AppController } from './app.controller';
 import { ConfigModule, ConfigService } from '@nestjs/config';
 import { InfraConfigModule } from './infra-config/infra-config.module';
 import { loadInfraConfiguration } from './infra-config/helper';
+import { MailerModule } from './mailer/mailer.module';
 
 @Module({
   imports: [
@@ -79,6 +80,7 @@ import { loadInfraConfiguration } from './infra-config/helper';
         },
       ],
     }),
+    MailerModule.register(),
     UserModule,
     AuthModule.register(),
     AdminModule,

packages/hoppscotch-backend/src/auth/auth.module.ts

@@ -2,7 +2,6 @@ import { Module } from '@nestjs/common';
 import { AuthService } from './auth.service';
 import { AuthController } from './auth.controller';
 import { UserModule } from 'src/user/user.module';
-import { MailerModule } from 'src/mailer/mailer.module';
 import { PrismaModule } from 'src/prisma/prisma.module';
 import { PassportModule } from '@nestjs/passport';
 import { JwtModule } from '@nestjs/jwt';
@@ -19,7 +18,6 @@ import { loadInfraConfiguration } from 'src/infra-config/helper';
   imports: [
     PrismaModule,
     UserModule,
-    MailerModule,
     PassportModule,
     JwtModule.registerAsync({
       imports: [ConfigModule],

packages/hoppscotch-backend/src/mailer/mailer.module.ts

@@ -1,4 +1,4 @@
-import { Module } from '@nestjs/common';
+import { Global, Module } from '@nestjs/common';
 import { MailerModule as NestMailerModule } from '@nestjs-modules/mailer';
 import { HandlebarsAdapter } from '@nestjs-modules/mailer/dist/adapters/handlebars.adapter';
 import { MailerService } from './mailer.service';
@@ -8,28 +8,41 @@ import {
   MAILER_SMTP_URL_UNDEFINED,
 } from 'src/errors';
 import { ConfigService } from '@nestjs/config';
+import { loadInfraConfiguration } from 'src/infra-config/helper';
 
+@Global()
 @Module({
-  imports: [
-    NestMailerModule.forRootAsync({
-      inject: [ConfigService],
-      useFactory: async (configService: ConfigService) => ({
-        transport:
-          configService.get('INFRA.MAILER_SMTP_URL') ??
-          throwErr(MAILER_SMTP_URL_UNDEFINED),
-        defaults: {
-          from:
-            configService.get('INFRA.MAILER_ADDRESS_FROM') ??
-            throwErr(MAILER_FROM_ADDRESS_UNDEFINED),
-        },
-        template: {
-          dir: __dirname + '/templates',
-          adapter: new HandlebarsAdapter(),
-        },
-      }),
-    }),
-  ],
+  imports: [],
   providers: [MailerService],
   exports: [MailerService],
 })
-export class MailerModule {}
+export class MailerModule {
+  static async register() {
+    const env = await loadInfraConfiguration();
+
+    let mailerSmtpUrl = env.INFRA.MAILER_SMTP_URL;
+    let mailerAddressFrom = env.INFRA.MAILER_ADDRESS_FROM;
+
+    if (!env.INFRA.MAILER_SMTP_URL || !env.INFRA.MAILER_ADDRESS_FROM) {
+      const config = new ConfigService();
+      mailerSmtpUrl = config.get('MAILER_SMTP_URL');
+      mailerAddressFrom = config.get('MAILER_ADDRESS_FROM');
+    }
+
+    return {
+      module: MailerModule,
+      imports: [
+        NestMailerModule.forRoot({
+          transport: mailerSmtpUrl ?? throwErr(MAILER_SMTP_URL_UNDEFINED),
+          defaults: {
+            from: mailerAddressFrom ?? throwErr(MAILER_FROM_ADDRESS_UNDEFINED),
+          },
+          template: {
+            dir: __dirname + '/templates',
+            adapter: new HandlebarsAdapter(),
+          },
+        }),
+      ],
+    };
+  }
+}

packages/hoppscotch-backend/src/team-invitation/team-invitation.module.ts

@@ -1,5 +1,4 @@
 import { Module } from '@nestjs/common';
-import { MailerModule } from 'src/mailer/mailer.module';
 import { PrismaModule } from 'src/prisma/prisma.module';
 import { PubSubModule } from 'src/pubsub/pubsub.module';
 import { TeamModule } from 'src/team/team.module';
@@ -12,7 +11,7 @@ import { TeamInviteeGuard } from './team-invitee.guard';
 import { TeamTeamInviteExtResolver } from './team-teaminvite-ext.resolver';
 
 @Module({
-  imports: [PrismaModule, TeamModule, PubSubModule, UserModule, MailerModule],
+  imports: [PrismaModule, TeamModule, PubSubModule, UserModule],
   providers: [
     TeamInvitationService,
     TeamInvitationResolver,