@cityssm/pdf-puppeteer/pageToPdf.js

Converts URLs and HTML to PDFs using Puppeteer.

import { getPaperSize } from '@cityssm/paper-sizes';
import Debug from 'debug';
import { DEBUG_NAMESPACE } from './debug.config.js';
import { defaultPdfOptions } from './defaultOptions.js';
const debug = Debug(`${DEBUG_NAMESPACE}:pageToPdf`);
/**
 * Converts a Puppeteer page to a PDF document.
 * @param page The Puppeteer page to convert to PDF.
 * @param instancePdfOptions Options for the PDF generation.
 * The options can include:
 * - `format`: The paper format (e.g., 'Letter', 'A4').
 * - `width` and `height`: Custom dimensions for the PDF.
 * @returns A Promise that resolves to a Uint8Array containing the PDF data.
 */
export default async function pageToPdf(page, instancePdfOptions = {}) {
    debug('Generating PDF...');
    const pdfOptions = {
        ...defaultPdfOptions,
        ...instancePdfOptions
    };
    if (pdfOptions.format !== undefined) {
        const size = getPaperSize(pdfOptions.format);
        // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
        if (size !== undefined) {
            delete pdfOptions.format;
            pdfOptions.width = `${size.width}${size.unit}`;
            pdfOptions.height = `${size.height}${size.unit}`;
        }
    }
    debug('Converting to PDF...');
    // eslint-disable-next-line @typescript-eslint/no-unsafe-type-assertion
    const pdfBuffer = await page.pdf(pdfOptions);
    debug('PDF conversion done.');
    debug(`PDF size: ${pdfBuffer.length} bytes`);
    return pdfBuffer;
}