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

src/js/workflow/nodes/extract-pages-node.ts

@@ -0,0 +1,68 @@
+import { ClassicPreset } from 'rete';
+import { BaseWorkflowNode } from './base-node';
+import { pdfSocket } from '../sockets';
+import type { SocketData, MultiPDFData } from '../types';
+import { requirePdfInput, extractAllPdfs } from '../types';
+import { PDFDocument } from 'pdf-lib';
+import { parsePageRange } from '../../utils/pdf-operations';
+
+export class ExtractPagesNode extends BaseWorkflowNode {
+  readonly category = 'Organize & Manage' as const;
+  readonly icon = 'ph-squares-four';
+  readonly description = 'Extract pages as separate PDFs';
+
+  constructor() {
+    super('Extract Pages');
+    this.addInput('pdf', new ClassicPreset.Input(pdfSocket, 'PDF'));
+    this.addOutput(
+      'pdf',
+      new ClassicPreset.Output(pdfSocket, 'Extracted PDFs')
+    );
+    this.addControl(
+      'pages',
+      new ClassicPreset.InputControl('text', { initial: '1,2,3' })
+    );
+  }
+
+  async data(
+    inputs: Record<string, SocketData[]>
+  ): Promise<Record<string, SocketData>> {
+    const pdfInputs = requirePdfInput(inputs, 'Extract Pages');
+    const allPdfs = extractAllPdfs(pdfInputs);
+
+    const pagesCtrl = this.controls['pages'] as
+      | ClassicPreset.InputControl<'text'>
+      | undefined;
+    const rangeStr = pagesCtrl?.value || '1';
+
+    const allItems = [];
+    for (const input of allPdfs) {
+      const srcDoc = await PDFDocument.load(input.bytes);
+      const totalPages = srcDoc.getPageCount();
+      const indices = parsePageRange(rangeStr, totalPages);
+
+      for (const idx of indices) {
+        const newPdf = await PDFDocument.create();
+        const [copiedPage] = await newPdf.copyPages(srcDoc, [idx]);
+        newPdf.addPage(copiedPage);
+        const pdfBytes = await newPdf.save();
+        allItems.push({
+          type: 'pdf' as const,
+          document: newPdf,
+          bytes: new Uint8Array(pdfBytes),
+          filename: `page_${idx + 1}.pdf`,
+        });
+      }
+    }
+
+    if (allItems.length === 1) {
+      return { pdf: allItems[0] };
+    }
+
+    const result: MultiPDFData = {
+      type: 'multi-pdf',
+      items: allItems,
+    };
+    return { pdf: result };
+  }
+}