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import { Request, Response, NextFunction } from 'express'; import { logger } from '#core/logger'; export const authenticate = (req: Request, res: Response, next: NextFunction): void => { const authHeader = req.headers['authorization']; if (!authHeader) { logger.warn('Authentication failed: No Authorization header'); res.status(401).json({ error: 'Authorization header required' }); return; } const tokenParts = authHeader.split(' '); if (tokenParts.length !== 2 || tokenParts[0].toLowerCase() !== 'bearer') { logger.warn('Authentication failed: Invalid token format'); res.status(401).json({ error: 'Invalid token format. Expected "Bearer <token>"' }); return; } const token = tokenParts[1]; req.githubToken = token; logger.info('Authentication successful'); next(); };