Google Apps Script Not Reading editable fields on PDF - pdf

Question

I created a code on GoogleAppScript with ORC to get text from a PDF file on Google Drive, using the getFileById() but the problem is that this file is an Adobe PDF Forms type and the code reads only the texts that are not in the fields that were edited in the form. Does anyone have any suggestions on how I can get this?
The file that I used as an example: http://foersom.com/net/HowTo/data/OoPdfFormExample.pdf (Please, fill the file and save on your drive to test it)
The PDF on my Drive:
PDF file image
This is the result:
values ​​shown when code is executed
Here is my code:
function extractTextFromPDF() {
var fileId = '[File ID here]';
const ss = SpreadsheetApp.getActiveSpreadsheet()
//Get all PDF files:
const fileID = DriveApp.getFileById(fileId);
var blob = DriveApp.getFileById(fileId).getBlob()
var resource = {
title: blob.getName(),
mimeType: blob.getContentType(),
};
// Enable the Advanced Drive API Service
var file = Drive.Files.insert( resource, blob, { ocr: true, ocrLanguage: 'en' } );
//,supportsAllDrives: true
// Extract Text from PDF file
var doc = DocumentApp.openById(file.id);
var text = doc.getBody().getText();
Logger.log(text)
return text;
}

Answer 1

The FDF data does not need to be stored in the order you see on the page, often may be the order the fields were added. The easiest way to see the text /V(alues) in reply to /T(ext field) entries is via the FDF a user can save and send without the Source PDF. This has the added advantage that a CHECK box will be sent as /V /Yes or /V /OFF (= NOT checked) which is notoriously difficult with a binary PDF, however you need to know which text on the page was Language 1 since the author did not tag it as Deutsch!
What intrigues me most (without looking closer) is the count of attached objects only went up by 12 but there are more than that number of potentially added answers,
from a field :-) of 17.
/Lang(en-GB)
/AcroForm<</Fields[
5 0 R 7 0 R 8 0 R 9 0 R 10 0 R
11 0 R 12 0 R 13 0 R 14 0 R 16 0 R
17 0 R 18 0 R 19 0 R 20 0 R 21 0 R
22 0 R 23 0 R
]/DR 37 0 R/NeedAppearances true>>
Anyway if you dont want to do it the easy way you will need to program something to read those object chains. Personally it takes each user a few seconds to export the forms or have them sent in the background by email however most modern users dont use historic mailto: so you have to get them to web mail the form for you to press the extract button.
So here is object 5 and we can see it is for your Given Name
5 0 obj
<</Type/Annot/Subtype/Widget/F 4
/Rect[165.7 453.7 315.7 467.9]
/FT/Tx
/P 1 0 R
/T(Given Name Text Box)
/TU<FEFF004600690072007300740020006E0061006D0065>
/V <FEFF>
/DV <FEFF>
/MaxLen 40
/DR<</Font 6 0 R>>
/DA(0 0 0 rg /F3 11 Tf)
/AP<<
/N 38 0 R
>>
>>
endobj
so the entry for 004600690072007300740020006E0061006D0065 converts to First name and we can see the answer when the user sends back the form as a PDF
5 0 obj
<</AP<</N 38 0 R >>/DA(0 0 0 rg /F3 11 Tf)/DR<</Font 6 0 R >>/DV<FEFF>/F 4/FT/Tx/MaxLen 40/P 1 0 R /Rect[ 165.7 453.7 315.7 467.9]/Subtype/Widget/T(Given Name Text Box)
/TU<FEFF004600690072007300740020006E0061006D0065>/Type/Annot/V(Brunno)>>
endobj