exportSlides() {
    if (this.isExporting || !this.presentationName) {
      return;
    }

    this.isExporting = true;
    const path = Api.path(`/export/${this.format}/${this.lobId}`);
    const slideIds = this.slides.map((slide: Slide) => slide.id);

    let presentationStatus: any;
    this.exportSubscribtion = this.downloadService.exportFile(path, slideIds).subscribe(status => {
      presentationStatus = status;
      this.checkPresentationStatus(presentationStatus.message);
    });
    if (this.isChecked) {
      this.exportMetaData(slideIds);
    }
  }

checkPresentationStatus(message: any) {
    const path = Api.path(`/export/status`);
    this.downloadService.checkPresentationStatus(path, message).pipe(
      delay(1000),
      map((response: any) => {
        return response.content;
      }),
    ).subscribe(
      (response: any) => {
        if (response.status === 'SUCCESS') {
          this.downloadService.saveFile(response.url, `${this.presentationName}.pptx`);
          this.isExporting = false;
          this.$close();
        } else {
          this.checkPresentationStatus(message);
        }
      }, error => {
        console.log(error);
      },
    );
  }