ch.codeblock.qrinvoice.pdf.QrPdfMerger Maven / Gradle / Ivy

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Provides an OpenPDF specific payment part receipt writer
There is a newer version: 1.20
/*-
 * #%L
 * QR Invoice Solutions
 * %%
 * Copyright (C) 2017 - 2022 Codeblock GmbH
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * -
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 * -
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see .
 * -
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses are available for this software. These replace the above
 * AGPLv3 terms and offer support, maintenance and allow the use in commercial /
 * proprietary products.
 * -
 * More information on commercial licenses are available at the following page:
 * https://www.qr-invoice.ch/licenses/
 * #L%
 */
package ch.codeblock.qrinvoice.pdf;

import ch.codeblock.qrinvoice.TechnicalException;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.*;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;

public class QrPdfMerger extends AbstractPdfMerger {
    public static QrPdfMerger create() {
        return new QrPdfMerger();
    }

    public byte[] mergePdfs(byte[] inputPdf, byte[] paymentPartReceiptPdf) throws IOException, TechnicalException {
        return mergePdfs(inputPdf, paymentPartReceiptPdf, 1);
    }

    public byte[] mergePdfs(byte[] inputPdf, byte[] paymentPartReceiptPdf, int onPage) throws IOException, TechnicalException {
        final PdfReader reader = new PdfReader(inputPdf);
        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        final PdfStamper stamper;
        try {
            stamper = new PdfStamper(reader, baos);
            final PdfContentByte canvas = stamper.getOverContent(onPage);
            final Rectangle basePage = reader.getPageSize(1);

            final PdfReader r = new PdfReader(paymentPartReceiptPdf);
            final PdfImportedPage paymentPartPage = stamper.getImportedPage(r, 1);
            final float x = basePage.getWidth() - paymentPartPage.getWidth();

            canvas.addTemplate(paymentPartPage, x, 0);
            stamper.getWriter().freeReader(r);
            r.close();
            stamper.close();
        } catch (DocumentException e) {
            throw new TechnicalException("Unable to merge PDFs", e);
        }

        return baos.toByteArray();
    }

    public byte[] appendPdfs(List data) throws IOException, TechnicalException {
        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        final Document document = new Document();
        final PdfCopy copy;
        try {
            copy = new PdfSmartCopy(document, baos);

            document.open();
            for (byte[] dataLoop : data) {
                final PdfReader pdfReaderOne = new PdfReader(dataLoop);
                importPdf(pdfReaderOne, copy).freeReader(pdfReaderOne);
                pdfReaderOne.close();
            }
            document.close();
        } catch (DocumentException e) {
            throw new TechnicalException("Unable to append PDFs", e);
        }

        return baos.toByteArray();
    }

}