Error in creating bookmarks while merging PDF documents using pdf-lib.

[vinodhreddygs]

What were you trying to do?

Hello,

I am using the latest version of pdf-lib (version 1.17) and trying to create bookmarks while merging documents. It works fine sometimes, but other times I receive the error message "TypeError: object.sizeInBytes is not a function".

Here is the code snippet I am using:

async function mergePDFDocuments(documents, data, CoverPage) {
    // Create a new PDF document to hold the merged PDF
    const pdfDoc = await PDFDocument.create();
    // Add the cover page to the merged PDF
    const coverPageDoc = await PDFDocument.load(CoverPage);
    const coverPage = await pdfDoc.copyPages(coverPageDoc, [0]);
    coverPage.forEach(page => pdfDoc.addPage(page));
    // Add the main PDF to the merged PDF
    const mainDoc = await PDFDocument.load(data);
    const mainDocPages = await pdfDoc.copyPages(mainDoc, mainDoc.getPageIndices());
    mainDocPages.forEach(page => pdfDoc.addPage(page));
    // Add additional PDF documents to the merged PDF
    let totalPageCount = mainDoc.getPageCount();
    for (const doc of documents) {
      console.log("==================Working with file...=======>", doc.filename)
      const docPages = await PDFDocument.load(doc.content);
      const pagesToCopy = await pdfDoc.copyPages(docPages, docPages.getPageIndices());
      pagesToCopy.forEach(page => pdfDoc.addPage(page));
      // Create bookmarks for this file
      const fileBookmarks = Array.from(Array(docPages.getPageCount()).keys()).map(pageNumber => {
        return {
          title: `Page ${totalPageCount + pageNumber + 1}`,
          pageNumber: totalPageCount + pageNumber,
        };
      });


 // Add bookmarks to merged document

let outlinesDict = pdfDoc.catalog.lookup(PDFName.of('Outlines'));
if (!outlinesDict) {
  outlinesDict = pdfDoc.context.obj({
    Type: 'Outlines',
    First: null,
    Last: null,
    Count: 0,
  });
  pdfDoc.catalog.set(PDFName.of('Outlines'), outlinesDict);
}

const bookmarksOutline = pdfDoc.context.obj({
  Type: 'Outline',
  First: null,
  Last: null,
  Count: 0,
});
pdfDoc.context.assign(outlinesDict, 'First', bookmarksOutline);

for (const bookmark of fileBookmarks) {
  const { title, pageNumber } = bookmark;
  const page = pdfDoc.getPage(pageNumber);
  const dest = pdfDoc.context.obj([
    pdfDoc.context.obj(page.dictionary),
    'Fit',
  ]);
  const bookmarkItem = pdfDoc.context.obj({
    Title: title,
    Dest: dest,
    Parent: bookmarksOutline,
  });
  pdfDoc.context.assign(bookmarksOutline, 'Count', bookmarksOutline.Count + 1);
  if (bookmarksOutline.Last) {
    pdfDoc.context.assign(bookmarksOutline.Last, 'Next', bookmarkItem);
    pdfDoc.context.assign(bookmarkItem, 'Prev', bookmarksOutline.Last);
    pdfDoc.context.assign(bookmarksOutline, 'Last', bookmarkItem);
  } else {
    pdfDoc.context.assign(bookmarksOutline, 'First', bookmarkItem);
    pdfDoc.context.assign(bookmarksOutline, 'Last', bookmarkItem);
  }
}

      totalPageCount += docPages.getPageCount();
    }
    // Save the merged PDF as a buffer and return it
    const pdfBytes = await pdfDoc.save();
    return Buffer.from(new Uint8Array(pdfBytes));
  }

Please let me know if there is anything else I can do to help.

How did you attempt to do it?

I feel like the issue is with the current version of this package.

What actually happened?

I feel like the issue is with the current version of this package.

What did you expect to happen?

I feel like the issue is with the current version of this package.

How can we reproduce the issue?

I feel like the issue is with the current version of this package.

Version

1.17.1

What environment are you running pdf-lib in?

Node

Checklist

• [X] My report includes a Short, Self Contained, Correct (Compilable) Example.
• [X] I have attached all PDFs, images, and other files needed to run my SSCCE.

Additional Notes

No response

[BluerAngala]

I have encountered the same problem, and I would like to know if you already have a solution? Thank you!