| 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 { |
| |
| } |
| try { |
| qpdf.FS.unlink(outputPath); |
| } catch { |
| |
| } |
| } |
|
|
| 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'), |
| }; |
| }), |
| }; |
| } |
| } |
|
|
