Added remove pages

shared-operations/src/functions/removePages.ts

@@ -0,0 +1,21 @@
+
+import { PdfFile } from '../wrappers/PdfFile.js';
+import { getPages } from './common/getPagesByIndex.js';
+import { invertSelection, parsePageIndexSpecification } from './common/pageIndexesUtils.js';
+
+export type RemovePagesParamsType = {
+    file: PdfFile;
+    pageSelector: string;
+}
+export async function removePages(params: RemovePagesParamsType) {
+    const { file, pageSelector } = params;
+    const pdfDoc = await file.pdfLibDocument;
+    const pageCount = pdfDoc.getPageCount();
+
+    const pageSelection = parsePageIndexSpecification(pageSelector, pageCount);
+    const pagesToKeep = invertSelection(pageSelection, pageCount);
+
+    const newFile = await getPages(file, pagesToKeep);
+    newFile.filename += "_removedPages"
+    return newFile;
+}