import { CallHandler, ExecutionContext, Injectable, NestInterceptor } from '@nestjs/common';
import { Observable } from 'rxjs';
import { tap } from 'rxjs/operators'

@Injectable()
export class LoggingInterceptor implements NestInterceptor {
  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
    console.log('I am a interceptor!')

    const now = Date.now();
    console.log('before...');


    
    return next
    .handle()
    .pipe(
      tap(() => console.log(`after... ${Date.now() - now}ms`))
    );
  }
}