Made split pdf functions conform to the new design pattern.

shared-operations/src/functions/common/splitPagesByIndex.ts

@@ -0,0 +1,25 @@
+
+import { PdfFile } from '../../wrappers/PdfFile.js';
+import { getPages } from "./getPagesByIndex";
+
+export async function splitPagesByIndex(file: PdfFile, splitAfterPageIndexes: number[]): Promise<PdfFile[]> {
+    const pdfLibDocument = await file.pdfLibDocument;
+    const numberOfPages = pdfLibDocument.getPages().length;
+
+    let pagesArray: number[]  = [];
+    let splitAfter = splitAfterPageIndexes.shift();
+    const subDocuments: PdfFile[]  = [];
+
+    for (let i = 0; i < numberOfPages; i++) {
+        if(splitAfter && i > splitAfter && pagesArray.length > 0) {
+            subDocuments.push(await getPages(file, pagesArray));
+            splitAfter = splitAfterPageIndexes.shift();
+            pagesArray = [];
+        }
+        pagesArray.push(i);
+    }
+    subDocuments.push(await getPages(file, pagesArray));
+    pagesArray = [];
+
+    return subDocuments;
+};