import express, { Request, Response, NextFunction } from 'express';
import { auth } from './auth.js';
import { userContextMiddleware } from './userContext.js';
import { i18nMiddleware } from './i18n.js';
import config from '../config/index.js';
import { getBetterAuthRuntimeConfig } from '../services/betterAuthConfig.js';
export const errorHandler = (
err: Error,
_req: Request,
res: Response,
_next: NextFunction,
): void => {
console.error('Unhandled error:', err);
res.status(500).json({
success: false,
message: 'Internal server error',
});
};
export const initMiddlewares = (app: express.Application): void => {
// Apply i18n middleware first to detect language for all requests
app.use(i18nMiddleware);
// Serve static files from the dynamically determined frontend path
// Note: Static files will be handled by the server directly, not here
app.use((req, res, next) => {
const basePath = config.basePath;
const betterAuthPath = `${basePath}${getBetterAuthRuntimeConfig().basePath}`;
// Only apply JSON parsing for API and auth routes, not for SSE or message endpoints
// TODO exclude sse responses by mcp endpoint
if (
!req.path.startsWith(betterAuthPath) &&
req.path !== `${basePath}/sse` &&
!req.path.startsWith(`${basePath}/sse/`) &&
req.path !== `${basePath}/messages` &&
!req.path.match(
new RegExp(`^${basePath.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')}/[^/]+/messages$`),
) &&
!req.path.match(
new RegExp(`^${basePath.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')}/[^/]+/sse(/.*)?$`),
)
) {
express.json()(req, res, next);
} else {
next();
}
});
// Protect API routes with authentication middleware, but exclude auth endpoints
app.use(`${config.basePath}/api`, (req, res, next) => {
// Skip authentication for login endpoint
if (
req.path === '/auth/login' ||
req.path.startsWith('/auth/better') ||
req.path.startsWith('/better-auth')
) {
next();
} else {
// Apply authentication middleware first
auth(req, res, (err) => {
if (err) {
next(err);
} else {
// Apply user context middleware after successful authentication
userContextMiddleware(req, res, next);
}
});
}
});
app.use(errorHandler);
};
