| 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 LinearizeNode extends BaseWorkflowNode { |
| readonly category = 'Optimize & Repair' as const; |
| readonly icon = 'ph-gauge'; |
| readonly description = 'Linearize PDF for fast web viewing'; |
|
|
| constructor() { |
| super('Linearize'); |
| this.addInput('pdf', new ClassicPreset.Input(pdfSocket, 'PDF')); |
| this.addOutput( |
| 'pdf', |
| new ClassicPreset.Output(pdfSocket, 'Linearized PDF') |
| ); |
| } |
|
|
| async data( |
| inputs: Record<string, SocketData[]> |
| ): Promise<Record<string, SocketData>> { |
| const pdfInputs = requirePdfInput(inputs, 'Linearize'); |
|
|
| 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_linearize_${uid}.pdf`; |
| const outputPath = `/tmp/output_linearize_${uid}.pdf`; |
|
|
| let resultBytes: Uint8Array; |
| try { |
| qpdf.FS.writeFile(inputPath, input.bytes); |
| qpdf.callMain([inputPath, '--linearize', outputPath]); |
| resultBytes = new Uint8Array(qpdf.FS.readFile(outputPath)); |
| } finally { |
| try { |
| qpdf.FS.unlink(inputPath); |
| } catch { |
| |
| } |
| try { |
| qpdf.FS.unlink(outputPath); |
| } catch { |
| |
| } |
| } |
|
|
| const document = await PDFDocument.load(resultBytes); |
|
|
| return { |
| type: 'pdf', |
| document, |
| bytes: resultBytes, |
| filename: input.filename.replace(/\.pdf$/i, '_linearized.pdf'), |
| }; |
| }), |
| }; |
| } |
| } |
|
|
