| 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 EncryptNode extends BaseWorkflowNode { |
| readonly category = 'Secure PDF' as const; |
| readonly icon = 'ph-lock'; |
| readonly description = 'Encrypt PDF with password'; |
|
|
| constructor() { |
| super('Encrypt'); |
| this.addInput('pdf', new ClassicPreset.Input(pdfSocket, 'PDF')); |
| this.addOutput('pdf', new ClassicPreset.Output(pdfSocket, 'Encrypted PDF')); |
| this.addControl( |
| 'userPassword', |
| new ClassicPreset.InputControl('text', { initial: '' }) |
| ); |
| this.addControl( |
| 'ownerPassword', |
| new ClassicPreset.InputControl('text', { initial: '' }) |
| ); |
| } |
|
|
| async data( |
| inputs: Record<string, SocketData[]> |
| ): Promise<Record<string, SocketData>> { |
| const pdfInputs = requirePdfInput(inputs, 'Encrypt'); |
|
|
| const getText = (key: string) => { |
| const ctrl = this.controls[key] as |
| | ClassicPreset.InputControl<'text'> |
| | undefined; |
| return ctrl?.value || ''; |
| }; |
|
|
| const userPassword = getText('userPassword'); |
| const ownerPassword = getText('ownerPassword') || userPassword; |
| if (!userPassword) |
| throw new Error('User password is required for encryption'); |
|
|
| 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_encrypt_${uid}.pdf`; |
| const outputPath = `/tmp/output_encrypt_${uid}.pdf`; |
|
|
| let encryptedData: Uint8Array; |
| try { |
| qpdf.FS.writeFile(inputPath, input.bytes); |
|
|
| const args = [ |
| inputPath, |
| '--encrypt', |
| userPassword, |
| ownerPassword, |
| '256', |
| ]; |
| if (ownerPassword !== userPassword) { |
| args.push( |
| '--modify=none', |
| '--extract=n', |
| '--print=none', |
| '--accessibility=n', |
| '--annotate=n', |
| '--assemble=n', |
| '--form=n', |
| '--modify-other=n' |
| ); |
| } |
| args.push('--', outputPath); |
| qpdf.callMain(args); |
|
|
| encryptedData = qpdf.FS.readFile(outputPath, { encoding: 'binary' }); |
| } finally { |
| try { |
| qpdf.FS.unlink(inputPath); |
| } catch { |
| |
| } |
| try { |
| qpdf.FS.unlink(outputPath); |
| } catch { |
| |
| } |
| } |
|
|
| const resultBytes = new Uint8Array(encryptedData); |
| const document = await PDFDocument.load(resultBytes, { |
| ignoreEncryption: true, |
| }); |
|
|
| return { |
| type: 'pdf', |
| document, |
| bytes: resultBytes, |
| filename: input.filename.replace(/\.pdf$/i, '_encrypted.pdf'), |
| }; |
| }), |
| }; |
| } |
| } |
|
|
