Prepojenie na externu DB, projekt-zakazky

backend/src/middleware/upload.middleware.ts

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+import multer from 'multer';
+import path from 'path';
+import { Request } from 'express';
+import { env } from '../config/env';
+
+// Povolené MIME typy
+const ALLOWED_MIME_TYPES = [
+  // Obrázky
+  'image/jpeg',
+  'image/png',
+  'image/gif',
+  'image/webp',
+  // Dokumenty
+  'application/pdf',
+  'application/msword',
+  'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+  'application/vnd.ms-excel',
+  'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+  'text/plain',
+  'text/csv',
+];
+
+// Povolené prípony
+const ALLOWED_EXTENSIONS = [
+  '.jpg', '.jpeg', '.png', '.gif', '.webp',
+  '.pdf', '.doc', '.docx', '.xls', '.xlsx',
+  '.txt', '.csv',
+];
+
+// Maximálna veľkosť súboru (default 10MB)
+const MAX_FILE_SIZE = parseInt(process.env.MAX_FILE_SIZE || '10485760', 10);
+
+// Storage konfigurácia
+const storage = multer.diskStorage({
+  destination: (req: Request, _file, cb) => {
+    // Určenie cieľového priečinka podľa entity type
+    const entityType = req.params.entityType || req.body.entityType || 'general';
+    const uploadPath = path.join(env.UPLOAD_DIR || 'uploads', entityType);
+    cb(null, uploadPath);
+  },
+  filename: (_req, file, cb) => {
+    // Generovanie unikátneho názvu: timestamp-random.extension
+    const uniqueSuffix = `${Date.now()}-${Math.round(Math.random() * 1e9)}`;
+    const ext = path.extname(file.originalname).toLowerCase();
+    cb(null, `${uniqueSuffix}${ext}`);
+  },
+});
+
+// File filter
+const fileFilter = (
+  _req: Request,
+  file: Express.Multer.File,
+  cb: multer.FileFilterCallback
+) => {
+  const ext = path.extname(file.originalname).toLowerCase();
+
+  // Kontrola MIME typu
+  if (!ALLOWED_MIME_TYPES.includes(file.mimetype)) {
+    cb(new Error(`Nepodporovaný typ súboru: ${file.mimetype}`));
+    return;
+  }
+
+  // Kontrola prípony
+  if (!ALLOWED_EXTENSIONS.includes(ext)) {
+    cb(new Error(`Nepodporovaná prípona súboru: ${ext}`));
+    return;
+  }
+
+  cb(null, true);
+};
+
+// Základná multer inštancia
+export const upload = multer({
+  storage,
+  fileFilter,
+  limits: {
+    fileSize: MAX_FILE_SIZE,
+    files: 10, // Max počet súborov naraz
+  },
+});
+
+// Pre-configured uploaders pre rôzne entity
+export const equipmentUpload = multer({
+  storage: multer.diskStorage({
+    destination: (_req, _file, cb) => {
+      cb(null, path.join(env.UPLOAD_DIR || 'uploads', 'equipment'));
+    },
+    filename: (_req, file, cb) => {
+      const uniqueSuffix = `${Date.now()}-${Math.round(Math.random() * 1e9)}`;
+      const ext = path.extname(file.originalname).toLowerCase();
+      cb(null, `${uniqueSuffix}${ext}`);
+    },
+  }),
+  fileFilter,
+  limits: {
+    fileSize: MAX_FILE_SIZE,
+    files: 10,
+  },
+});
+
+export const rmaUpload = multer({
+  storage: multer.diskStorage({
+    destination: (_req, _file, cb) => {
+      cb(null, path.join(env.UPLOAD_DIR || 'uploads', 'rma'));
+    },
+    filename: (_req, file, cb) => {
+      const uniqueSuffix = `${Date.now()}-${Math.round(Math.random() * 1e9)}`;
+      const ext = path.extname(file.originalname).toLowerCase();
+      cb(null, `${uniqueSuffix}${ext}`);
+    },
+  }),
+  fileFilter,
+  limits: {
+    fileSize: MAX_FILE_SIZE,
+    files: 10,
+  },
+});
+
+// Pending upload - for files before entity is created
+export const pendingUpload = multer({
+  storage: multer.diskStorage({
+    destination: (_req, _file, cb) => {
+      cb(null, path.join(env.UPLOAD_DIR || 'uploads', 'pending'));
+    },
+    filename: (_req, file, cb) => {
+      const uniqueSuffix = `${Date.now()}-${Math.round(Math.random() * 1e9)}`;
+      const ext = path.extname(file.originalname).toLowerCase();
+      cb(null, `${uniqueSuffix}${ext}`);
+    },
+  }),
+  fileFilter,
+  limits: {
+    fileSize: MAX_FILE_SIZE,
+    files: 10,
+  },
+});
+
+export const taskUpload = multer({
+  storage: multer.diskStorage({
+    destination: (_req, _file, cb) => {
+      cb(null, path.join(env.UPLOAD_DIR || 'uploads', 'task'));
+    },
+    filename: (_req, file, cb) => {
+      const uniqueSuffix = `${Date.now()}-${Math.round(Math.random() * 1e9)}`;
+      const ext = path.extname(file.originalname).toLowerCase();
+      cb(null, `${uniqueSuffix}${ext}`);
+    },
+  }),
+  fileFilter,
+  limits: {
+    fileSize: MAX_FILE_SIZE,
+    files: 10,
+  },
+});
+
+// Helper pre získanie URL súboru
+export const getFileUrl = (entityType: string, filename: string): string => {
+  return `/uploads/${entityType}/${filename}`;
+};
+
+// Helper pre získanie cesty súboru
+export const getFilePath = (entityType: string, filename: string): string => {
+  return path.join(env.UPLOAD_DIR || 'uploads', entityType, filename);
+};