feat: split pdf

src/pages/tools/pdf/split-pdf/index.tsx

@@ -9,6 +9,7 @@ import { parsePageRanges, splitPdf } from './service';
 import { CardExampleType } from '@components/examples/ToolExamples';
 import { PDFDocument } from 'pdf-lib';
 import { FormikProps } from 'formik';
+import ToolPdfInput from '@components/input/ToolPdfInput';
 
 type InitialValuesType = {
   pageRanges: string;
@@ -115,7 +116,7 @@ export default function SplitPdf({ title }: ToolComponentProps) {
       compute={compute}
       exampleCards={exampleCards}
       inputComponent={
-        <ToolFileInput
+        <ToolPdfInput
           value={input}
           onChange={setInput}
           accept={['application/pdf']}

src/pages/tools/pdf/split-pdf/service.ts

@@ -23,7 +23,15 @@ export function parsePageRanges(
     if (trimmedRange.includes('-')) {
       const [start, end] = trimmedRange.split('-').map(Number);
       if (!isNaN(start) && !isNaN(end)) {
-        for (let i = Math.max(1, start); i <= Math.min(totalPages, end); i++) {
+        // Handle both forward and reversed ranges
+        const normalizedStart = Math.min(start, end);
+        const normalizedEnd = Math.max(start, end);
+
+        for (
+          let i = Math.max(1, normalizedStart);
+          i <= Math.min(totalPages, normalizedEnd);
+          i++
+        ) {
           pageNumbers.add(i);
         }
       }