migration to typescript

Backend/src/app.ts

@@ -0,0 +1,83 @@
+import express, { Application, Request, Response } from 'express';
+import cors from 'cors';
+import helmet from 'helmet';
+import rateLimit from 'express-rate-limit';
+import swaggerUi from 'swagger-ui-express';
+import { config } from './config';
+import { logger } from './config/logger';
+import { errorHandler } from './middleware/errorHandler';
+import { RegisterRoutes } from './routes/routes';
+
+export function createApp(): Application {
+    const app = express();
+
+    // Security middleware
+    app.use(helmet());
+    app.use(cors({
+        origin: config.cors.origin,
+        credentials: true
+    }));
+
+    // Rate limiting
+    const limiter = rateLimit({
+        windowMs: config.rateLimit.windowMs,
+        max: config.rateLimit.maxRequests,
+        message: {
+            error: {
+                code: 'RATE_LIMIT_EXCEEDED',
+                message: 'Too many requests, please try again later'
+            }
+        }
+    });
+    app.use('/api/', limiter);
+
+    // Body parsing
+    app.use(express.json());
+    app.use(express.urlencoded({ extended: true }));
+
+    // Request logging
+    app.use((req: Request, res: Response, next) => {
+        logger.info('Incoming request', {
+            method: req.method,
+            path: req.path,
+            ip: req.ip
+        });
+        next();
+    });
+
+    // Swagger documentation
+    try {
+        const swaggerDocument = require('../public/swagger.json');
+        app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(swaggerDocument));
+        logger.info('Swagger documentation available at /api-docs');
+    } catch (error) {
+        logger.warn('Swagger documentation not available. Run "npm run tsoa:gen" to generate it.');
+    }
+
+    // Simple health check endpoint (not using TSOA)
+    app.get('/health', (req: Request, res: Response) => {
+        res.json({
+            status: 'ok',
+            timestamp: new Date().toISOString(),
+            uptime: process.uptime()
+        });
+    });
+
+    // Register TSOA routes
+    RegisterRoutes(app);
+
+    // 404 handler
+    app.use((req: Request, res: Response) => {
+        res.status(404).json({
+            error: {
+                code: 'NOT_FOUND',
+                message: 'Route not found'
+            }
+        });
+    });
+
+    // Error handler (must be last)
+    app.use(errorHandler);
+
+    return app;
+}