Stirling-PDF/shared-operations/functions/splitPDF.ts
Felix Kaspar 97e4eab7bb Cleaned the server-node dir
Split express into different ports for easier migration
Typed page ops that had warnings
2023-11-08 02:24:16 +01:00

28 lines
913 B
TypeScript

import { PDFDocument } from 'pdf-lib';
import { createSubDocument } from "./common/createSubDocument.js";
export async function splitPDF(snapshot: string | Uint8Array | ArrayBuffer, splitAfterPageArray: number[]): Promise<Uint8Array[]> {
const pdfDoc = await PDFDocument.load(snapshot)
const numberOfPages = pdfDoc.getPages().length;
let pagesArray: number[] = [];
let splitAfter = splitAfterPageArray.shift();
const subDocuments: Uint8Array[] = [];
for (let i = 0; i < numberOfPages; i++) {
if(splitAfter && i > splitAfter && pagesArray.length > 0) {
subDocuments.push(await createSubDocument(pdfDoc, pagesArray));
splitAfter = splitAfterPageArray.shift();
pagesArray = [];
}
pagesArray.push(i);
}
subDocuments.push(await createSubDocument(pdfDoc, pagesArray));
pagesArray = [];
return subDocuments;
};