documenso/packages/lib/client-only/download-pdf.ts

import type { DocumentData } from '@documenso/prisma/client';

import { getFile } from '../universal/upload/get-file';

type DownloadPDFProps = {
  documentData: DocumentData;
  fileName?: string;
};

export const downloadPDF = async ({ documentData, fileName }: DownloadPDFProps) => {
  const bytes = await getFile(documentData);

  const blob = new Blob([bytes], {
    type: 'application/pdf',
  });

  const link = window.document.createElement('a');
  const baseTitle = fileName?.includes('.pdf') ? fileName.split('.pdf')[0] : fileName;

  link.href = window.URL.createObjectURL(blob);
  link.download = baseTitle ? `${baseTitle}_signed.pdf` : 'document.pdf';

  link.click();

  window.URL.revokeObjectURL(link.href);
};