refactor: Extract certificate template to separate file with template selection
- Move HTML template to src/templates/certificates/AIcertifikat.html
- Add template rendering with {{variable}} and {{#if}} syntax
- Add CERTIFICATE_TEMPLATES registry for multiple templates
- Accept templateName parameter in generateCertificate
- Add hasCertificate check to prevent duplicate certificates
- Add hasCertificate field to getCombinedTableData query
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
richardtekula
@@ -4,12 +4,30 @@ import fs from 'fs/promises';
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import crypto from 'crypto';
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import { db } from '../../config/database.js';
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import { registracie, ucastnici, kurzy, prilohy } from '../../db/schema.js';
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import { eq } from 'drizzle-orm';
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import { eq, and } from 'drizzle-orm';
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import { NotFoundError } from '../../utils/errors.js';
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import { logger } from '../../utils/logger.js';
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const UPLOAD_DIR = path.join(process.cwd(), 'uploads', 'ai-kurzy', 'certificates');
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const ASSETS_DIR = path.join(process.cwd(), 'src', 'assets', 'certificate');
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const TEMPLATES_DIR = path.join(process.cwd(), 'src', 'templates', 'certificates');
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/**
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* Available certificate templates
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*/
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export const CERTIFICATE_TEMPLATES = {
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AIcertifikat: {
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name: 'AI Certifikát',
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file: 'AIcertifikat.html',
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description: 'Osvedčenie o absolvovaní AI kurzu',
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},
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// Add more templates here in the future
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// participation: {
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// name: 'Potvrdenie o účasti',
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// file: 'participation.html',
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// description: 'Potvrdenie o účasti na školení',
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// },
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};
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/**
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* Format date to Slovak format (DD.MM.YYYY)
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@@ -47,246 +65,88 @@ const loadAssets = async () => {
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]);
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return {
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background: `data:image/jpeg;base64,${background.toString('base64')}`,
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backgroundImage: `data:image/jpeg;base64,${background.toString('base64')}`,
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signatureGablasova: `data:image/png;base64,${signatureGablasova.toString('base64')}`,
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signatureZdarilek: `data:image/png;base64,${signatureZdarilek.toString('base64')}`,
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};
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};
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/**
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* Generate HTML template for certificate
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* Load HTML template from file
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*/
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const generateCertificateHtml = (data, assets) => {
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const { participantName, courseTitle, courseModules, dateFrom, dateTo, issueDate, certificateId } = data;
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// Format date range
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let dateRangeText = '';
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if (dateFrom && dateTo) {
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dateRangeText = `${formatDate(dateFrom)} - ${formatDate(dateTo)}`;
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} else if (dateTo) {
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dateRangeText = formatDate(dateTo);
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} else if (dateFrom) {
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dateRangeText = formatDate(dateFrom);
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const loadTemplate = async (templateName) => {
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const template = CERTIFICATE_TEMPLATES[templateName];
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if (!template) {
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throw new NotFoundError(`Šablóna "${templateName}" neexistuje`);
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}
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return `
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<!DOCTYPE html>
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<html lang="sk">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Osvedčenie - ${participantName}</title>
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<style>
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@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700&family=Open+Sans:wght@300;400;500;600&display=swap');
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const templatePath = path.join(TEMPLATES_DIR, template.file);
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try {
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return await fs.readFile(templatePath, 'utf-8');
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} catch (error) {
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throw new NotFoundError(`Súbor šablóny "${template.file}" nenájdený`);
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}
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};
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* {
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margin: 0;
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padding: 0;
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box-sizing: border-box;
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}
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/**
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* Replace template placeholders with actual values
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* Supports {{variable}} and {{#if variable}}...{{/if}} syntax
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*/
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const renderTemplate = (template, data) => {
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let html = template;
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@page {
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size: A4 landscape;
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margin: 0;
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}
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// Handle conditional blocks {{#if variable}}...{{/if}}
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html = html.replace(/\{\{#if\s+(\w+)\}\}([\s\S]*?)\{\{\/if\}\}/g, (match, variable, content) => {
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return data[variable] ? content : '';
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});
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html, body {
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width: 297mm;
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height: 210mm;
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overflow: hidden;
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}
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// Replace simple placeholders {{variable}}
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html = html.replace(/\{\{(\w+)\}\}/g, (match, variable) => {
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return data[variable] !== undefined ? data[variable] : '';
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});
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body {
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font-family: 'Open Sans', Arial, sans-serif;
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background: #fff;
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}
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return html;
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};
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.certificate {
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width: 297mm;
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height: 210mm;
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position: relative;
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background-image: url('${assets.background}');
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background-size: cover;
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background-position: center;
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background-repeat: no-repeat;
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}
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/**
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* Get list of available templates
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*/
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export const getAvailableTemplates = () => {
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return Object.entries(CERTIFICATE_TEMPLATES).map(([key, value]) => ({
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id: key,
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name: value.name,
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description: value.description,
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}));
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};
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/* Main content area - positioned in the white space */
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.content {
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position: absolute;
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top: 28mm;
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left: 0;
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right: 0;
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text-align: center;
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}
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/**
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* Check if certificate already exists for registration
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*/
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export const hasCertificate = async (registraciaId) => {
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const [existing] = await db
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.select({ id: prilohy.id })
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.from(prilohy)
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.where(and(
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eq(prilohy.registraciaId, registraciaId),
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eq(prilohy.typPrilohy, 'certifikat')
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))
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.limit(1);
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.main-title {
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font-family: 'Playfair Display', Georgia, serif;
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font-size: 52pt;
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font-weight: 700;
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letter-spacing: 14px;
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color: #1a1a1a;
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text-transform: uppercase;
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margin-bottom: 2mm;
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}
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.subtitle {
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font-family: 'Open Sans', Arial, sans-serif;
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font-size: 18pt;
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font-weight: 400;
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color: #333;
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letter-spacing: 1px;
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margin-bottom: 18mm;
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}
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.course-section {
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margin-top: 5mm;
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}
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.course-title {
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font-family: 'Playfair Display', Georgia, serif;
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font-size: 32pt;
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font-weight: 600;
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color: #1a1a1a;
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margin-bottom: 3mm;
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}
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.course-modules {
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font-family: 'Open Sans', Arial, sans-serif;
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font-size: 13pt;
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font-weight: 500;
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color: #333;
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line-height: 1.5;
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margin-bottom: 2mm;
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}
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.course-dates {
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font-family: 'Open Sans', Arial, sans-serif;
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font-size: 12pt;
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font-weight: 400;
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color: #444;
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}
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.participant-name {
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font-family: 'Playfair Display', Georgia, serif;
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font-size: 36pt;
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font-weight: 600;
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color: #1a1a1a;
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margin-top: 14mm;
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}
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/* Footer section with signatures */
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.footer-section {
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position: absolute;
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bottom: 28mm;
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left: 25mm;
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right: 25mm;
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display: flex;
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justify-content: space-between;
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align-items: flex-end;
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}
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.date-location {
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font-family: 'Open Sans', Arial, sans-serif;
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font-size: 11pt;
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color: #333;
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}
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.signatures {
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display: flex;
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gap: 25mm;
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}
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.signature {
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text-align: center;
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min-width: 55mm;
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}
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.signature-image {
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height: 18mm;
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margin-bottom: 1mm;
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object-fit: contain;
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}
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.signature-line {
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width: 55mm;
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height: 0.4mm;
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background: #333;
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margin: 0 auto 2mm auto;
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}
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.signature-name {
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font-family: 'Open Sans', Arial, sans-serif;
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font-size: 10pt;
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font-weight: 600;
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color: #1a1a1a;
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}
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.signature-title {
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font-family: 'Open Sans', Arial, sans-serif;
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font-size: 9pt;
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font-weight: 400;
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color: #555;
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}
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.certificate-id {
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position: absolute;
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bottom: 20mm;
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right: 25mm;
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font-family: 'Open Sans', Arial, sans-serif;
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font-size: 7pt;
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color: #999;
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letter-spacing: 0.5px;
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}
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</style>
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</head>
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<body>
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<div class="certificate">
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<div class="content">
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<h1 class="main-title">O S V E D Č E N I E</h1>
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<p class="subtitle">o absolvovaní kurzu</p>
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<div class="course-section">
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<h2 class="course-title">${courseTitle}</h2>
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${courseModules ? `<p class="course-modules">${courseModules}</p>` : ''}
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${dateRangeText ? `<p class="course-dates">${dateRangeText}</p>` : ''}
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</div>
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<h3 class="participant-name">${participantName}</h3>
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</div>
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<div class="footer-section">
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<div class="date-location">
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V Bratislave ${formatDate(issueDate)}
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</div>
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<div class="signatures">
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<div class="signature">
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<img src="${assets.signatureZdarilek}" alt="Podpis" class="signature-image" />
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<div class="signature-line"></div>
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<p class="signature-name">Mgr. Tomáš Zdarílek</p>
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<p class="signature-title">lektor</p>
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</div>
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<div class="signature">
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<img src="${assets.signatureGablasova}" alt="Podpis" class="signature-image" />
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<div class="signature-line"></div>
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<p class="signature-name">Ing. Jana Gablasová</p>
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<p class="signature-title">konateľ</p>
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</div>
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</div>
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</div>
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<div class="certificate-id">ID: ${certificateId}</div>
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</div>
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</body>
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</html>
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`;
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return !!existing;
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};
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/**
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* Generate certificate PDF for a registration
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* @param {number} registraciaId - Registration ID
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* @param {string} templateName - Template name (default: 'AIcertifikat')
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*/
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export const generateCertificate = async (registraciaId) => {
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export const generateCertificate = async (registraciaId, templateName = 'AIcertifikat') => {
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// Check if certificate already exists
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const exists = await hasCertificate(registraciaId);
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if (exists) {
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throw new Error('Certifikát pre túto registráciu už existuje');
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}
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// Fetch registration with participant and course data
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const [registration] = await db
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.select({
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@@ -333,8 +193,11 @@ export const generateCertificate = async (registraciaId) => {
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throw new NotFoundError('Kurz nenájdený');
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}
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// Load assets
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const assets = await loadAssets();
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// Load template and assets
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const [templateHtml, assets] = await Promise.all([
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loadTemplate(templateName),
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loadAssets(),
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]);
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// Generate certificate data
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const certificateId = generateCertificateId(registraciaId);
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@@ -344,18 +207,29 @@ export const generateCertificate = async (registraciaId) => {
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const issueDate = registration.datumDo || registration.datumOd || new Date();
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const certificateData = {
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// Format date range
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let dateRange = '';
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if (registration.datumOd && registration.datumDo) {
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dateRange = `${formatDate(registration.datumOd)} - ${formatDate(registration.datumDo)}`;
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} else if (registration.datumDo) {
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dateRange = formatDate(registration.datumDo);
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} else if (registration.datumOd) {
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dateRange = formatDate(registration.datumOd);
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}
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// Prepare template data
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const templateData = {
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participantName,
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courseTitle: course.nazov,
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courseModules: course.popis || null,
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dateFrom: registration.datumOd,
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dateTo: registration.datumDo,
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issueDate,
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courseModules: course.popis || '',
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dateRange,
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issueDate: formatDate(issueDate),
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certificateId,
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...assets,
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};
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// Generate HTML
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const html = generateCertificateHtml(certificateData, assets);
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// Render template with data
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const html = renderTemplate(templateHtml, templateData);
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// Ensure upload directory exists
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await fs.mkdir(UPLOAD_DIR, { recursive: true });
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@@ -388,7 +262,7 @@ export const generateCertificate = async (registraciaId) => {
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margin: { top: 0, right: 0, bottom: 0, left: 0 },
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});
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logger.info(`Certificate generated: ${fileName}`);
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logger.info(`Certificate generated: ${fileName} (template: ${templateName})`);
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} finally {
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if (browser) {
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await browser.close();
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@@ -408,7 +282,7 @@ export const generateCertificate = async (registraciaId) => {
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cestaKSuboru: filePath,
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mimeType: 'application/pdf',
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velkostSuboru: stats.size,
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popis: `Certifikát vygenerovaný ${formatDate(new Date())} - ${certificateId}`,
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popis: `Certifikát vygenerovaný ${formatDate(new Date())} - ${certificateId} (šablóna: ${templateName})`,
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})
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.returning();
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@@ -419,6 +293,7 @@ export const generateCertificate = async (registraciaId) => {
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certificateId,
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participantName,
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courseTitle: course.nazov,
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templateUsed: templateName,
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};
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};
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