Method to get pageNumber for TextFields in pdf-lib ??

[satyajitnayk]

Is it possible to get page no for each pdf text fields without iterating over all pages ?
Looping solution do exists #1090 (comment)

import {PDFDocument} from 'pdf-lib';
const pdfDocument = PDFDocument.load("file_path")
pdfDocument
        .getForm()
        .getFields()
        .map((_) => {
          return {
            pageNo: // ??? Need Logic to do so//
            name: _.getName(),
            type: _ instanceof PDFCheckBox ? 'generic' : 'string',
          };
        })

[satyajitnayk]

Method to give page number map as of current code structure of pdf-lib:

async function getPageNumberMapForFields(pdfDoc: PDFDocument) {
    const d: { [key: string]: number } = {};
    const form = pdfDoc.getForm();
    const pages = pdfDoc.getPages();
    form.getFields().forEach((field) => {
      form
        .getField(field.getName())
        .acroField.getWidgets()
        .forEach((w) => {
          const widgetRef: PDFRef | undefined = pdfDoc.context.getObjectRef(
            w.dict,
          );
          for (let idx = 0, len = pages.length; idx < len; idx++) {
            if (
              pages[idx].node.Annots()?.indexOf(widgetRef as PDFRef) !==
              undefined
            ) {
              d[field.getName()] = idx + 1;
              break;
            }
          }
        });
    });
    return d;
  }

[satyajitnayk]

You can also use this optimised version of the function too

async function getPageNumberMapForFields(pdfDoc: PDFDocument) {
 const pageNoMap: { [key: string]: number } = {};
    const form = pdfDoc.getForm();
    const pages = pdfDoc.getPages();
    // Create a reverse map of widget references to page numbers
    const pageNoRefMap: { [ref: string]: number } = {};
    pages.forEach((page, index) => {
      const annots = page.node.Annots();
      annots?.asArray()?.forEach((annot) => {
        pageNoRefMap[annot.toString()] = index + 1;
      });
    });
    form.getFields().forEach((field) => {
      form
        .getField(field.getName())
        .acroField.getWidgets()
        .forEach((w) => {
          const widgetRef: PDFRef | undefined = pdfDoc.context.getObjectRef(
            w.dict,
          );
          pageNoMap[field.getName()] =
            pageNoRefMap[widgetRef?.toString() ?? ''];
        });
    });
    return pageNoMap;
}