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