Created
January 12, 2024 16:35
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Response Transform Interceptor for Nest.JS
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import { | |
Injectable, | |
NestInterceptor, | |
ExecutionContext, | |
CallHandler, | |
} from '@nestjs/common'; | |
import { Observable } from 'rxjs'; | |
import { map } from 'rxjs/operators'; | |
export interface ResponseTemplate<T> { | |
message: string; | |
data: T; | |
} | |
interface Response<T> { | |
message: string; | |
statusCode: number; | |
data: T; | |
} | |
@Injectable() | |
export class TransformInterceptor<T> | |
implements NestInterceptor<T, Response<T>> | |
{ | |
intercept( | |
context: ExecutionContext, | |
next: CallHandler, | |
): Observable<Response<T>> { | |
return next.handle().pipe( | |
map((data: ResponseTemplate<T>) => ({ | |
message: data.message, | |
statusCode: context.switchToHttp().getResponse<{ statusCode: number }>() | |
.statusCode, | |
data: data.data, | |
})), | |
); | |
} | |
} |
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