70 lines
2.0 KiB
TypeScript
70 lines
2.0 KiB
TypeScript
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 Fb2ToPdfNode extends BaseWorkflowNode {
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readonly category = 'Input' as const;
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readonly icon = 'ph-book-bookmark';
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readonly description = 'Upload FB2 e-books and convert to PDF';
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private files: File[] = [];
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constructor() {
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super('FB2 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('.fb2')) {
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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 `${this.files.length} FB2 files`;
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}
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async data(
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_inputs: Record<string, SocketData[]>
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): Promise<Record<string, SocketData>> {
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if (this.files.length === 0)
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throw new Error('No FB2 files uploaded in FB2 Input node');
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const pymupdf = await loadPyMuPDF();
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const results: PDFData[] = [];
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for (const file of this.files) {
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const blob = await pymupdf.convertToPdf(file, { filetype: 'fb2' });
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const bytes = new Uint8Array(await blob.arrayBuffer());
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const document = await PDFDocument.load(bytes);
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results.push({
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type: 'pdf',
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document,
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bytes,
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filename: file.name.replace(/\.fb2$/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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