added 2 new root folders

shared-operations/functions/splitPDF.js

@@ -0,0 +1,24 @@
+import { createSubDocument } from "./extractPages.js";
+
+export async function splitPDF(snapshot, splitAfterPageArray, PDFLib) {
+    const pdfDoc = await PDFLib.PDFDocument.load(snapshot)
+
+    const numberOfPages = pdfDoc.getPages().length;
+
+    let pagesArray = [];
+    let splitAfter = splitAfterPageArray.shift();
+    const subDocuments = [];
+
+    for (let i = 0; i < numberOfPages; i++) {
+        if(i > splitAfter && pagesArray.length > 0) {
+            subDocuments.push(await createSubDocument(pdfDoc, pagesArray, PDFLib));
+            splitAfter = splitAfterPageArray.shift();
+            pagesArray = [];
+        }
+        pagesArray.push(i);        
+    }
+    subDocuments.push(await createSubDocument(pdfDoc, pagesArray, PDFLib));
+    pagesArray = [];
+
+    return subDocuments;
+};