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import fs from 'fs/promises';
import path from 'path';
import os from 'os';
import multer from 'multer';
const uploadRoot = path.join(os.tmpdir(), 'uploads');
await fs.mkdir(uploadRoot, { recursive: true });
const storage = multer.diskStorage({
destination: (req, file, cb) => cb(null, uploadRoot),
filename: (req, file, cb) => {
// Preserve original file extension
const ext = path.extname(file.originalname) || '.zip';
cb(null, `problem_${Date.now()}${ext}`);
}
});
// Only accept zip files (common mime types), also allow extension-based fallback
function zipFileFilter(req, file, cb) {
const okMime = ['application/zip', 'application/x-zip-compressed'];
const okExt = /\.zip$/i.test(file.originalname);
if (okMime.includes(file.mimetype) || okExt) cb(null, true);
else cb(new Error('Only .zip is allowed'));
}
export const uploadZip = multer({
storage,
fileFilter: zipFileFilter,
limits: { fileSize: 2 * 1024 * 1024 * 1024 } // 2GB limit, adjust as needed
}).single('zipfile');
export const upload = multer({ storage: multer.memoryStorage(), limits: { fileSize: 5 * 1024 * 1024 } });
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