[typescript-nestjs-server] Fix #21842 by updating api.module.mustache

modules/openapi-generator/src/main/resources/typescript-nestjs-server/api.module.mustache

@@ -7,18 +7,30 @@ import { {{classname}}Controller } from './controllers';
 {{/apis}}
 {{/apiInfo}}
 
+export type ApiModuleConfiguration = {
+  /**
+  * your Api implementations
+  */
+  apiImplementations: ApiImplementations,
+  /**
+  * additional Providers that may be used by your implementations
+  */
+  providers?: Provider[],
+}
+
 @Module({})
 export class ApiModule {
-  static forRoot(apiImplementations: ApiImplementations): DynamicModule {
+  static forRoot(configuration: ApiModuleConfiguration): DynamicModule {
       const providers: Provider[] = [
 {{#apiInfo}}
 {{#apis}}
         {
           provide: {{classname}},
-          useClass: apiImplementations.{{#lambda.camelcase}}{{classname}}{{/lambda.camelcase}}
+          useClass: configuration.apiImplementations.{{#lambda.camelcase}}{{classname}}{{/lambda.camelcase}}
         },
 {{/apis}}
 {{/apiInfo}}
+        ...(configuration.providers || []),
       ];
 
       return {

samples/server/petstore/typescript-nestjs-server/builds/default/api.module.ts

@@ -7,22 +7,34 @@ import { StoreApiController } from './controllers';
 import { UserApi } from './api';
 import { UserApiController } from './controllers';
 
+export type ApiModuleConfiguration = {
+  /**
+  * your Api implementations
+  */
+  apiImplementations: ApiImplementations,
+  /**
+  * additional Providers that may be used by your implementations
+  */
+  providers?: Provider[],
+}
+
 @Module({})
 export class ApiModule {
-  static forRoot(apiImplementations: ApiImplementations): DynamicModule {
+  static forRoot(configuration: ApiModuleConfiguration): DynamicModule {
       const providers: Provider[] = [
         {
           provide: PetApi,
-          useClass: apiImplementations.petApi
+          useClass: configuration.apiImplementations.petApi
         },
         {
           provide: StoreApi,
-          useClass: apiImplementations.storeApi
+          useClass: configuration.apiImplementations.storeApi
         },
         {
           provide: UserApi,
-          useClass: apiImplementations.userApi
+          useClass: configuration.apiImplementations.userApi
         },
+        ...(configuration.providers || []),
       ];
 
       return {

samples/server/petstore/typescript-nestjs-server/src/TestService.ts

@@ -0,0 +1,8 @@
+import { Injectable } from '@nestjs/common';
+
+@Injectable()
+export class TestService {
+  hello(): string {
+    return "Hello World";
+  }
+}

samples/server/petstore/typescript-nestjs-server/src/app.module.ts

@@ -3,14 +3,18 @@ import { PetService } from './handlers/PetService';
 import { UserService } from './handlers/UserService';
 import { StoreService } from './handlers/StoreService';
 import { ApiModule } from '../builds/default';
+import { TestService } from './TestService';
 
 @Module({
   imports: [
     ApiModule.forRoot({
-      petApi: PetService,
-      userApi: UserService,
-      storeApi: StoreService,
-    }),
+      apiImplementations: {
+        petApi: PetService,
+        userApi: UserService,
+        storeApi: StoreService,
+    },
+    providers: [TestService]
+}),
   ],
   controllers: [],
   providers: [],

samples/server/petstore/typescript-nestjs-server/src/handlers/PetService.ts

@@ -3,9 +3,13 @@ import { Observable } from 'rxjs';
 import { Injectable } from '@nestjs/common';
 import { PetApi } from '../../builds/default/api';
 import { ApiResponse, Pet } from '../../builds/default/models';
+import { TestService } from '../TestService'
 
 @Injectable()
 export class PetService implements PetApi {
+
+  constructor(private readonly testService: TestService) {}
+
   addPet(pet: Pet, request: Request): Pet | Promise<Pet> | Observable<Pet> {
     console.log(JSON.stringify(pet));
     return pet;