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

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

@@ -0,0 +1,84 @@
+import { ClassicPreset } from 'rete';
+import { BaseWorkflowNode } from './base-node';
+import { pdfSocket } from '../sockets';
+import type { SocketData } from '../types';
+import { requirePdfInput, processBatch } from '../types';
+import { performOcr } from '../../utils/ocr';
+
+export class OCRNode extends BaseWorkflowNode {
+  readonly category = 'Organize & Manage' as const;
+  readonly icon = 'ph-barcode';
+  readonly description = 'Add searchable text layer via OCR';
+
+  constructor() {
+    super('OCR');
+    this.addInput('pdf', new ClassicPreset.Input(pdfSocket, 'PDF'));
+    this.addOutput(
+      'pdf',
+      new ClassicPreset.Output(pdfSocket, 'Searchable PDF')
+    );
+    this.addControl(
+      'language',
+      new ClassicPreset.InputControl('text', { initial: 'eng' })
+    );
+    this.addControl(
+      'resolution',
+      new ClassicPreset.InputControl('text', { initial: '3.0' })
+    );
+    this.addControl(
+      'binarize',
+      new ClassicPreset.InputControl('text', { initial: 'false' })
+    );
+    this.addControl(
+      'whitelist',
+      new ClassicPreset.InputControl('text', { initial: '' })
+    );
+  }
+
+  async data(
+    inputs: Record<string, SocketData[]>
+  ): Promise<Record<string, SocketData>> {
+    const pdfInputs = requirePdfInput(inputs, 'OCR');
+
+    const langCtrl = this.controls['language'] as
+      | ClassicPreset.InputControl<'text'>
+      | undefined;
+    const language = langCtrl?.value || 'eng';
+
+    const resCtrl = this.controls['resolution'] as
+      | ClassicPreset.InputControl<'text'>
+      | undefined;
+    const resolution = Math.max(
+      1.0,
+      Math.min(4.0, parseFloat(resCtrl?.value ?? '3.0'))
+    );
+
+    const binarizeCtrl = this.controls['binarize'] as
+      | ClassicPreset.InputControl<'text'>
+      | undefined;
+    const binarize = (binarizeCtrl?.value ?? 'false') === 'true';
+
+    const whitelistCtrl = this.controls['whitelist'] as
+      | ClassicPreset.InputControl<'text'>
+      | undefined;
+    const whitelist = whitelistCtrl?.value || '';
+
+    return {
+      pdf: await processBatch(pdfInputs, async (input) => {
+        const result = await performOcr(input.bytes, {
+          language,
+          resolution,
+          binarize,
+          whitelist,
+        });
+
+        return {
+          type: 'pdf',
+          document: result.pdfDoc,
+          bytes: result.pdfBytes,
+          filename: input.filename.replace(/\.pdf$/i, '_ocr.pdf'),
+        };
+      }),
+    };
+  }
+}