Flatted and issues fixed with Claude Desktop.
This commit is contained in:
khalid@traclabs.com
273
server.js
Normal file
273
server.js
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@@ -0,0 +1,273 @@
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import express from 'express';
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import cors from 'cors';
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import multer from 'multer';
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import { v4 as uuidv4 } from 'uuid';
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import sharp from 'sharp';
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import { createCanvas, loadImage } from 'canvas';
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import { fileURLToPath } from 'module';
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import { dirname, join } from 'path';
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import { mkdirSync, existsSync, writeFileSync } from 'fs';
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const __filename = fileURLToPath(import.meta.url);
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const __dirname = dirname(__filename);
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const app = express();
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const PORT = process.env.PORT || 3001;
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const IS_PRODUCTION = process.env.NODE_ENV === 'production';
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// Ensure upload and export directories exist
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const uploadsDir = join(__dirname, 'uploads');
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const exportsDir = join(__dirname, 'exports');
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[uploadsDir, exportsDir].forEach((dir) => {
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if (!existsSync(dir)) mkdirSync(dir, { recursive: true });
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});
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// Middleware — restrict CORS in production
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const corsOptions = IS_PRODUCTION
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? { origin: process.env.CORS_ORIGIN || false }
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: { origin: true };
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app.use(cors(corsOptions));
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app.use(express.json({ limit: '50mb' }));
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app.use(express.urlencoded({ extended: true, limit: '50mb' }));
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// Serve static files for uploads and exports
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app.use('/uploads', express.static(uploadsDir));
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app.use('/exports', express.static(exportsDir));
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// In production, serve the Vite-built client
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if (IS_PRODUCTION) {
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const clientDist = join(__dirname, 'dist');
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app.use(express.static(clientDist));
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}
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// Map MIME types to file extensions
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const MIME_TO_EXT = {
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'image/jpeg': 'jpg',
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'image/png': 'png',
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'image/webp': 'webp',
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};
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// Configure multer for image uploads
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const storage = multer.diskStorage({
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destination: (_req, _file, cb) => {
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cb(null, uploadsDir);
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},
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filename: (_req, file, cb) => {
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const ext = MIME_TO_EXT[file.mimetype] || 'bin';
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cb(null, `${uuidv4()}.${ext}`);
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},
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});
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const fileFilter = (_req, file, cb) => {
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if (MIME_TO_EXT[file.mimetype]) {
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cb(null, true);
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} else {
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cb(new Error('Invalid file type. Only JPEG, PNG, and WebP are allowed.'), false);
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}
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};
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const upload = multer({
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storage,
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fileFilter,
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limits: { fileSize: 20 * 1024 * 1024 },
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});
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// ── API Routes ──────────────────────────────────────────────────────────────
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// Health check
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app.get('/api/health', (_req, res) => {
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res.json({ status: 'ok', timestamp: new Date().toISOString() });
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});
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// Upload
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app.post('/api/upload', upload.single('image'), async (req, res) => {
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try {
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if (!req.file) {
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return res.status(400).json({ error: 'No file uploaded' });
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}
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const originalUrl = `/uploads/${req.file.filename}`;
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// Create preview by resizing to max 1000px
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const previewFilename = `${uuidv4()}.png`;
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const previewDir = join(uploadsDir, 'preview');
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if (!existsSync(previewDir)) mkdirSync(previewDir, { recursive: true });
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await sharp(req.file.path)
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.resize({ width: 1000, height: 1000, fit: 'inside' })
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.png()
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.toFile(join(previewDir, previewFilename));
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res.json({
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success: true,
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original: {
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url: originalUrl,
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filename: req.file.filename,
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size: req.file.size,
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mimetype: req.file.mimetype,
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},
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preview: {
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url: `/uploads/preview/${previewFilename}`,
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filename: previewFilename,
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},
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});
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} catch (error) {
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console.error('Upload error:', error);
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res.status(500).json({ error: 'Failed to process upload', details: error.message });
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}
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});
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// High-resolution export (300×300 → 4500×4500 @ 300 DPI)
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const EXPORT_SCALE = 15;
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const EXPORT_SIZE = 4500;
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app.post('/api/export', async (req, res) => {
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try {
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const { elements, designName = 'design', template } = req.body;
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if (!elements || !Array.isArray(elements)) {
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return res.status(400).json({ error: 'Elements array is required' });
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}
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const canvas = createCanvas(EXPORT_SIZE, EXPORT_SIZE);
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const ctx = canvas.getContext('2d');
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// Template background
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if (template?.background) {
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const bg = template.background;
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if (bg.type === 'color') {
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ctx.fillStyle = bg.color;
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ctx.fillRect(0, 0, EXPORT_SIZE, EXPORT_SIZE);
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} else if (bg.type === 'image' && bg.src) {
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try {
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const imgUrl = bg.src.startsWith('/')
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? join(__dirname, bg.src.replace('/uploads', 'uploads'))
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: bg.src;
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const img = await loadImage(imgUrl);
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ctx.drawImage(img, 0, 0, EXPORT_SIZE, EXPORT_SIZE);
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} catch (imgError) {
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console.error('Failed to load template background:', imgError);
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ctx.fillStyle = '#ffffff';
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ctx.fillRect(0, 0, EXPORT_SIZE, EXPORT_SIZE);
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}
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}
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} else {
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ctx.fillStyle = '#ffffff';
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ctx.fillRect(0, 0, EXPORT_SIZE, EXPORT_SIZE);
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}
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// Render a single element
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const renderElement = async (el) => {
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ctx.save();
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const x = (el.x || 0) * EXPORT_SCALE;
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const y = (el.y || 0) * EXPORT_SCALE;
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const centerX = x + ((el.width || el.fontSize || 100) * EXPORT_SCALE) / 2;
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const centerY = y + ((el.height || el.fontSize || 100) * EXPORT_SCALE) / 2;
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ctx.translate(centerX, centerY);
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ctx.rotate(((el.rotation || 0) * Math.PI) / 180);
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ctx.translate(-centerX, -centerY);
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if (el.type === 'image' && el.src) {
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try {
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const imgUrl = el.src.startsWith('/')
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? join(__dirname, el.src.replace('/uploads', 'uploads'))
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: el.src;
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const img = await loadImage(imgUrl);
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const width = (el.width || 100) * EXPORT_SCALE;
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const height = (el.height || 100) * EXPORT_SCALE;
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if (el.crop) {
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ctx.drawImage(img, el.crop.sx, el.crop.sy, el.crop.sWidth, el.crop.sHeight, x, y, width, height);
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} else {
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ctx.drawImage(img, x, y, width, height);
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}
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} catch (imgError) {
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console.error('Failed to load image for export:', imgError);
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}
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} else if (el.type === 'text') {
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const fontSize = ((el.fontSize || 32) * EXPORT_SCALE) / 32;
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ctx.font = `${fontSize}px "${el.fontFamily || 'Arial'}"`;
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ctx.fillStyle = el.fill || '#000000';
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ctx.textAlign = 'center';
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ctx.textBaseline = 'middle';
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ctx.fillText(el.text || '', centerX, centerY);
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}
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ctx.restore();
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};
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// Render user elements
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for (const el of elements) {
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if (el.nonPrintable) continue;
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await renderElement(el);
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}
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// Render template overlay
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if (template?.overlay) {
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for (const overlayEl of template.overlay) {
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if (overlayEl.nonPrintable) continue;
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await renderElement(overlayEl);
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}
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}
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// Save to file
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const exportFilename = `${designName.replace(/[^a-z0-9]/gi, '_')}_${uuidv4()}.png`;
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const exportPath = join(exportsDir, exportFilename);
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writeFileSync(exportPath, canvas.toBuffer('image/png'));
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res.json({
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success: true,
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export: {
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url: `/exports/${exportFilename}`,
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filename: exportFilename,
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width: EXPORT_SIZE,
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height: EXPORT_SIZE,
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dpi: 300,
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sizeInches: '15x15',
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},
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});
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} catch (error) {
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console.error('Export error:', error);
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res.status(500).json({ error: 'Failed to export design', details: error.message });
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}
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});
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// Download
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app.get('/api/download/:filename', (req, res) => {
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const filePath = join(exportsDir, req.params.filename);
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if (!existsSync(filePath)) {
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return res.status(404).json({ error: 'File not found' });
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}
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res.download(filePath);
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});
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// API 404 catch-all (before SPA catch-all)
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app.all('/api/*', (_req, res) => {
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res.status(404).json({ error: 'API route not found' });
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});
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// In production, SPA catch-all
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if (IS_PRODUCTION) {
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app.get('*', (_req, res) => {
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res.sendFile(join(__dirname, 'dist', 'index.html'));
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});
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}
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// Error handling
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app.use((err, _req, res, _next) => {
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if (err instanceof multer.MulterError) {
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if (err.code === 'LIMIT_FILE_SIZE') {
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return res.status(400).json({ error: 'File too large. Maximum size is 20MB.' });
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}
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return res.status(400).json({ error: err.message });
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}
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console.error('Unhandled error:', err);
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res.status(500).json({ error: 'Internal server error', details: err.message });
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});
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app.listen(PORT, () => {
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console.log(`Server running on http://localhost:${PORT}`);
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console.log(`Mode: ${IS_PRODUCTION ? 'production' : 'development'}`);
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});
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Reference in New Issue
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