107 lines
3.0 KiB
JavaScript
107 lines
3.0 KiB
JavaScript
/**
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* PDF Generator Service - Main service for PDF generation
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* Clean Code: Facade Pattern, Single Responsibility
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*/
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import { PDFDocument } from 'pdf-lib'
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import fs from 'fs/promises'
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import path from 'path'
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import { fillPdfForm } from './pdf-form-filler.js'
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/**
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* PDF Generation Result
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*/
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export class PDFGenerationResult {
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constructor(success, pdfBuffer, filename, error = null) {
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this.success = success
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this.pdfBuffer = pdfBuffer
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this.filename = filename
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this.error = error
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}
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}
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/**
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* PDF Generator Service
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*/
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export class PDFGeneratorService {
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constructor() {
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this.templatePath = path.join(process.cwd(), 'server', 'templates', 'mitgliedschaft-fillable.pdf')
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this.fallbackTemplatePath = path.join(process.cwd(), 'server', 'templates', 'Aufnahmeantrag 2025.pdf')
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}
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/**
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* Generates PDF from template with form data
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* @param {Object} data - Form data
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* @returns {Promise<PDFGenerationResult>} Generation result
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*/
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async generateFromTemplate(data) {
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try {
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const templatePath = await this.getTemplatePath()
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const templateBytes = await fs.readFile(templatePath)
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const pdfDoc = await PDFDocument.load(templateBytes)
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const form = pdfDoc.getForm()
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// Fill form fields
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await fillPdfForm(pdfDoc, form, data)
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// Don't flatten form to keep fields editable
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// form.flatten() makes fields non-editable
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// Generate filename
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const filename = this.generateFilename(data)
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// Save PDF
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const pdfBytes = await pdfDoc.save()
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return new PDFGenerationResult(true, Buffer.from(pdfBytes), filename)
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} catch (error) {
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console.error('Template PDF generation failed:', error.message)
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return new PDFGenerationResult(false, null, null, error.message)
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}
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}
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/**
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* Gets the appropriate template path
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* @returns {Promise<string>} Template path
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*/
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async getTemplatePath() {
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try {
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await fs.access(this.templatePath)
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return this.templatePath
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} catch (error) {
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try {
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await fs.access(this.fallbackTemplatePath)
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return this.fallbackTemplatePath
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} catch (fallbackError) {
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throw new Error('No PDF template found')
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}
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}
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}
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/**
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* Generates filename for PDF
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* @param {Object} data - Form data
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* @returns {string} Filename
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*/
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generateFilename(data) {
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const timestamp = Date.now()
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const name = `${data.nachname || 'Unbekannt'}_${data.vorname || 'Unbekannt'}`
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return `beitrittserklärung_${timestamp}.pdf`
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}
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/**
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* Saves PDF to file system
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* @param {Buffer} pdfBuffer - PDF buffer
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* @param {string} filename - Filename
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* @param {string} uploadDir - Upload directory
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* @returns {Promise<string>} File path
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*/
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async savePDF(pdfBuffer, filename, uploadDir) {
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// nosemgrep: javascript.lang.security.audit.path-traversal.path-join-resolve-traversal.path-join-resolve-traversal
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const filePath = path.join(uploadDir, filename)
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await fs.writeFile(filePath, pdfBuffer)
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return filePath
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}
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}
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