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

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

@@ -0,0 +1,61 @@
+import { ClassicPreset } from 'rete';
+import { BaseWorkflowNode } from './base-node';
+import { pdfSocket } from '../sockets';
+import type { SocketData } from '../types';
+import { requirePdfInput, processBatch } from '../types';
+import { PDFDocument } from 'pdf-lib';
+
+export class DividePagesNode extends BaseWorkflowNode {
+  readonly category = 'Organize & Manage' as const;
+  readonly icon = 'ph-columns';
+  readonly description = 'Split pages vertically or horizontally';
+
+  constructor() {
+    super('Divide Pages');
+    this.addInput('pdf', new ClassicPreset.Input(pdfSocket, 'PDF'));
+    this.addOutput('pdf', new ClassicPreset.Output(pdfSocket, 'Divided PDF'));
+    this.addControl(
+      'direction',
+      new ClassicPreset.InputControl('text', { initial: 'vertical' })
+    );
+  }
+
+  async data(
+    inputs: Record<string, SocketData[]>
+  ): Promise<Record<string, SocketData>> {
+    const pdfInputs = requirePdfInput(inputs, 'Divide Pages');
+    const dirCtrl = this.controls['direction'] as
+      | ClassicPreset.InputControl<'text'>
+      | undefined;
+    const direction =
+      dirCtrl?.value === 'horizontal' ? 'horizontal' : 'vertical';
+
+    return {
+      pdf: await processBatch(pdfInputs, async (input) => {
+        const srcDoc = await PDFDocument.load(input.bytes);
+        const newDoc = await PDFDocument.create();
+        for (let i = 0; i < srcDoc.getPageCount(); i++) {
+          const [page1] = await newDoc.copyPages(srcDoc, [i]);
+          const [page2] = await newDoc.copyPages(srcDoc, [i]);
+          const { width, height } = page1.getSize();
+          if (direction === 'vertical') {
+            page1.setCropBox(0, 0, width / 2, height);
+            page2.setCropBox(width / 2, 0, width / 2, height);
+          } else {
+            page1.setCropBox(0, height / 2, width, height / 2);
+            page2.setCropBox(0, 0, width, height / 2);
+          }
+          newDoc.addPage(page1);
+          newDoc.addPage(page2);
+        }
+        const pdfBytes = await newDoc.save();
+        return {
+          type: 'pdf',
+          document: newDoc,
+          bytes: new Uint8Array(pdfBytes),
+          filename: input.filename.replace(/\.pdf$/i, '_divided.pdf'),
+        };
+      }),
+    };
+  }
+}