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

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

@@ -0,0 +1,79 @@
+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';
+import { loadPyMuPDF } from '../../utils/pymupdf-loader.js';
+
+export class RasterizeNode extends BaseWorkflowNode {
+  readonly category = 'Optimize & Repair' as const;
+  readonly icon = 'ph-image';
+  readonly description = 'Convert to image-based PDF';
+
+  constructor() {
+    super('Rasterize');
+    this.addInput('pdf', new ClassicPreset.Input(pdfSocket, 'PDF'));
+    this.addOutput(
+      'pdf',
+      new ClassicPreset.Output(pdfSocket, 'Rasterized PDF')
+    );
+    this.addControl(
+      'rasterizeDpi',
+      new ClassicPreset.InputControl('text', { initial: '150' })
+    );
+    this.addControl(
+      'imageFormat',
+      new ClassicPreset.InputControl('text', { initial: 'png' })
+    );
+    this.addControl(
+      'grayscale',
+      new ClassicPreset.InputControl('text', { initial: 'false' })
+    );
+  }
+
+  async data(
+    inputs: Record<string, SocketData[]>
+  ): Promise<Record<string, SocketData>> {
+    const pdfInputs = requirePdfInput(inputs, 'Rasterize');
+
+    const getText = (key: string, fallback: string) => {
+      const ctrl = this.controls[key] as
+        | ClassicPreset.InputControl<'text'>
+        | undefined;
+      return ctrl?.value || fallback;
+    };
+
+    const dpi = Math.max(
+      72,
+      Math.min(600, parseInt(getText('rasterizeDpi', '150')) || 150)
+    );
+    const format = getText('imageFormat', 'png') === 'jpeg' ? 'jpeg' : 'png';
+    const grayscale = getText('grayscale', 'false') === 'true';
+
+    return {
+      pdf: await processBatch(pdfInputs, async (input) => {
+        const pymupdf = await loadPyMuPDF();
+        const blob = new Blob([new Uint8Array(input.bytes)], {
+          type: 'application/pdf',
+        });
+        const rasterizedBlob = await pymupdf.rasterizePdf(blob, {
+          dpi,
+          format,
+          grayscale,
+          quality: 95,
+        });
+
+        const bytes = new Uint8Array(await rasterizedBlob.arrayBuffer());
+        const document = await PDFDocument.load(bytes);
+
+        return {
+          type: 'pdf',
+          document,
+          bytes,
+          filename: input.filename.replace(/\.pdf$/i, '_rasterized.pdf'),
+        };
+      }),
+    };
+  }
+}