// SPDX-FileCopyrightText: Copyright Orangebot, Inc. and Medplum contributors
// SPDX-License-Identifier: Apache-2.0
import PdfPrinter from 'pdfmake';
import type { CustomTableLayout, TDocumentDefinitions, TFontDictionary } from 'pdfmake/interfaces';
/**
* Generates a PDF buffer from a document definition.
*
* @param docDefinition - The PDF document definition.
* @param tableLayouts - Optional custom table layouts.
* @param fonts - Optional custom fonts (uses default fonts if not provided).
* @returns Promise that resolves to a Buffer containing the PDF.
*/
export function createPdf(
docDefinition: TDocumentDefinitions,
tableLayouts?: Record<string, CustomTableLayout>,
fonts?: TFontDictionary
): Promise<Buffer> {
return new Promise((resolve, reject) => {
const defaultFonts: TFontDictionary = {
Helvetica: {
normal: 'Helvetica',
bold: 'Helvetica-Bold',
italics: 'Helvetica-Oblique',
bolditalics: 'Helvetica-BoldOblique',
},
};
const printer = new PdfPrinter(fonts ?? defaultFonts);
const pdfDoc = printer.createPdfKitDocument(docDefinition, { tableLayouts });
const chunks: Uint8Array[] = [];
pdfDoc.on('data', (chunk: Uint8Array) => chunks.push(chunk));
pdfDoc.on('end', () => resolve(Buffer.concat(chunks)));
pdfDoc.on('error', reject);
pdfDoc.end();
});
}
