Add visual workflow builder, fix critical bugs, and add Arabic i18n support

src/js/workflow/nodes/split-node.ts

@@ -0,0 +1,49 @@
+import { ClassicPreset } from 'rete';
+import { BaseWorkflowNode } from './base-node';
+import { pdfSocket } from '../sockets';
+import type { SocketData } from '../types';
+import { requirePdfInput, processBatch } from '../types';
+import { splitPdf, parsePageRange } from '../../utils/pdf-operations';
+import { PDFDocument } from 'pdf-lib';
+
+export class SplitNode extends BaseWorkflowNode {
+  readonly category = 'Organize & Manage' as const;
+  readonly icon = 'ph-scissors';
+  readonly description = 'Extract a range of pages';
+
+  constructor() {
+    super('Split PDF');
+    this.addInput('pdf', new ClassicPreset.Input(pdfSocket, 'PDF'));
+    this.addOutput('pdf', new ClassicPreset.Output(pdfSocket, 'Split PDF'));
+    this.addControl(
+      'pages',
+      new ClassicPreset.InputControl('text', { initial: '1-3' })
+    );
+  }
+
+  async data(
+    inputs: Record<string, SocketData[]>
+  ): Promise<Record<string, SocketData>> {
+    const pdfInputs = requirePdfInput(inputs, 'Split PDF');
+    const pagesControl = this.controls['pages'] as
+      | ClassicPreset.InputControl<'text'>
+      | undefined;
+    const rangeStr = pagesControl?.value || '1';
+
+    return {
+      pdf: await processBatch(pdfInputs, async (input) => {
+        const srcDoc = await PDFDocument.load(input.bytes);
+        const totalPages = srcDoc.getPageCount();
+        const indices = parsePageRange(rangeStr, totalPages);
+        const resultBytes = await splitPdf(input.bytes, indices);
+        const resultDoc = await PDFDocument.load(resultBytes);
+        return {
+          type: 'pdf',
+          document: resultDoc,
+          bytes: resultBytes,
+          filename: input.filename.replace(/\.pdf$/i, '_split.pdf'),
+        };
+      }),
+    };
+  }
+}