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

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

@@ -0,0 +1,75 @@
+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 { initializeQpdf } from '../../utils/helpers.js';
+
+export class DecryptNode extends BaseWorkflowNode {
+  readonly category = 'Secure PDF' as const;
+  readonly icon = 'ph-lock-open';
+  readonly description = 'Remove PDF password protection';
+
+  constructor() {
+    super('Decrypt');
+    this.addInput('pdf', new ClassicPreset.Input(pdfSocket, 'PDF'));
+    this.addOutput('pdf', new ClassicPreset.Output(pdfSocket, 'Decrypted PDF'));
+    this.addControl(
+      'password',
+      new ClassicPreset.InputControl('text', { initial: '' })
+    );
+  }
+
+  async data(
+    inputs: Record<string, SocketData[]>
+  ): Promise<Record<string, SocketData>> {
+    const pdfInputs = requirePdfInput(inputs, 'Decrypt');
+
+    const passCtrl = this.controls['password'] as
+      | ClassicPreset.InputControl<'text'>
+      | undefined;
+    const password = passCtrl?.value || '';
+
+    return {
+      pdf: await processBatch(pdfInputs, async (input) => {
+        const qpdf = await initializeQpdf();
+        const uid = `${Date.now()}_${Math.random().toString(36).slice(2, 9)}`;
+        const inputPath = `/tmp/input_decrypt_${uid}.pdf`;
+        const outputPath = `/tmp/output_decrypt_${uid}.pdf`;
+
+        let decryptedData: Uint8Array;
+        try {
+          qpdf.FS.writeFile(inputPath, input.bytes);
+          const args = password
+            ? [inputPath, '--password=' + password, '--decrypt', outputPath]
+            : [inputPath, '--decrypt', outputPath];
+          qpdf.callMain(args);
+
+          decryptedData = qpdf.FS.readFile(outputPath, { encoding: 'binary' });
+        } finally {
+          try {
+            qpdf.FS.unlink(inputPath);
+          } catch {
+            /* cleanup */
+          }
+          try {
+            qpdf.FS.unlink(outputPath);
+          } catch {
+            /* cleanup */
+          }
+        }
+
+        const resultBytes = new Uint8Array(decryptedData);
+        const document = await PDFDocument.load(resultBytes);
+
+        return {
+          type: 'pdf',
+          document,
+          bytes: resultBytes,
+          filename: input.filename.replace(/\.pdf$/i, '_decrypted.pdf'),
+        };
+      }),
+    };
+  }
+}