81 lines
2.3 KiB
TypeScript
81 lines
2.3 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 { PDFData, SocketData, MultiPDFData } from '../types';
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import { PDFDocument } from 'pdf-lib';
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import { loadPyMuPDF } from '../../utils/pymupdf-loader.js';
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export class JsonToPdfNode extends BaseWorkflowNode {
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readonly category = 'Input' as const;
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readonly icon = 'ph-file-code';
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readonly description = 'Upload JSON files and convert to PDF';
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private files: File[] = [];
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constructor() {
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super('JSON Input');
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this.addOutput('pdf', new ClassicPreset.Output(pdfSocket, 'PDF'));
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}
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async addFiles(fileList: File[]): Promise<void> {
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for (const file of fileList) {
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if (file.name.toLowerCase().endsWith('.json')) {
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this.files.push(file);
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}
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}
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}
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removeFile(index: number): void {
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this.files.splice(index, 1);
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}
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hasFile(): boolean {
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return this.files.length > 0;
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}
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getFileCount(): number {
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return this.files.length;
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}
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getFilenames(): string[] {
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return this.files.map((f) => f.name);
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}
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getFilename(): string {
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if (this.files.length === 0) return '';
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if (this.files.length === 1) return this.files[0].name;
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return `${this.files.length} JSON files`;
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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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if (this.files.length === 0)
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throw new Error('No JSON files uploaded in JSON Input node');
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const pymupdf = await loadPyMuPDF();
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const results: PDFData[] = [];
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for (const file of this.files) {
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const rawText = await file.text();
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let formatted: string;
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try {
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formatted = JSON.stringify(JSON.parse(rawText), null, 2);
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} catch {
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formatted = rawText;
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}
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const pdfBlob = await pymupdf.textToPdf(formatted, {
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fontSize: 10,
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fontName: 'cour',
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pageSize: 'a4',
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});
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const bytes = new Uint8Array(await pdfBlob.arrayBuffer());
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const pdfDoc = await PDFDocument.load(bytes);
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results.push({
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type: 'pdf',
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document: pdfDoc,
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bytes,
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filename: file.name.replace(/\.json$/i, '.pdf'),
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});
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}
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if (results.length === 1) return { pdf: results[0] };
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return { pdf: { type: 'multi-pdf', items: results } as MultiPDFData };
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}
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}
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