added rearrange-pages endpoint

shared-operations/src/functions/arrangePages.ts

@@ -0,0 +1,27 @@
+
+import { PdfFile } from '../wrappers/PdfFile.js';
+import { Sorts } from './common/pageIndexesSorting.js';
+import { getPages } from './common/getPagesByIndex.js';
+import { parsePageIndexSpecification } from './common/pageIndexesUtils.js';
+
+export type ArrangePagesParamsType = {
+    file: PdfFile;
+    arrangementConfig: string; // a member of Sorts, or a page index specification
+}
+export async function arrangePages(params: ArrangePagesParamsType) {
+    const { file, arrangementConfig } = params;
+    const pdfLibDocument = await file.pdfLibDocument;
+    const pageCount = pdfLibDocument.getPageCount();
+
+    let sortIndexes: number[];
+    if (arrangementConfig in Sorts) {
+        const sortFunction = Sorts[arrangementConfig];
+        sortIndexes = sortFunction(pageCount);
+    } else {
+        sortIndexes = parsePageIndexSpecification(arrangementConfig, pageCount);
+    }
+    
+    const newFile = await getPages(file, sortIndexes);
+    newFile.filename += "arrangedPages"
+    return newFile;
+}

shared-operations/src/functions/sortPagesWithPreset.ts

@@ -1,25 +0,0 @@
-
-import { PdfFile } from '../wrappers/PdfFile.js';
-import { Sorts } from './common/pageIndexesSorting.js';
-import { getPages } from './common/getPagesByIndex.js';
-
-export type SortPagesWithPresetParamsType = {
-    file: PdfFile;
-    sortPreset: string;
-}
-export async function sortPagesWithPreset(params: SortPagesWithPresetParamsType) {
-    const { file, sortPreset } = params;
-    const pdfLibDocument = await file.pdfLibDocument;
-
-    if (!(sortPreset in Sorts)) {
-        throw new Error("Supplied parameters not supported");
-    }
-
-    const sortFunction = Sorts[sortPreset];
-    const pageCount = pdfLibDocument.getPageCount();
-    const sortIndexes = sortFunction(pageCount);
-    
-    const newFile = await getPages(file, sortIndexes);
-    newFile.filename += "_sortedPages"
-    return newFile;
-}