import { CallHandler, ExecutionContext, Injectable, NestInterceptor } from '@nestjs/common'
import { Observable } from 'rxjs'
import { tap } from 'rxjs/operators'
import { AppLogger } from '../logger/logger.service'
import { REQUEST_ID_TOKEN_HEADER } from '../constants'
@Injectable()
export class LoggingInterceptor implements NestInterceptor {
constructor(private appLogger: AppLogger) {
this.appLogger.setContext(LoggingInterceptor.name)
}
intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
const request = context.switchToHttp().getRequest()
const method = request.method
const url = request.originalUrl
const requestID = request.headers[REQUEST_ID_TOKEN_HEADER]
this.appLogger.log({ method, requestID, url })
const now = Date.now()
return next.handle().pipe(
tap(() => {
const response = context.switchToHttp().getResponse()
const statusCode = response.statusCode
const responseTime = Date.now() - now
this.appLogger.log({ method, requestID, url, statusCode, responseTime })
})
)
}
}
