econ/backend/internal/middleware/auth.go

package middleware

import (
	"net/http"
	"strings"

	"github.com/gin-gonic/gin"
	"github.com/ren/econ/backend/internal/services"
)

func AuthMiddleware(authService *services.AuthService) gin.HandlerFunc {
	return func(c *gin.Context) {
		authHeader := c.GetHeader("Authorization")
		if authHeader == "" {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header requerido"})
			c.Abort()
			return
		}

		parts := strings.SplitN(authHeader, " ", 2)
		if len(parts) != 2 || parts[0] != "Bearer" {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Formato de authorization header inválido"})
			c.Abort()
			return
		}

		claims, err := authService.ValidateToken(parts[1])
		if err != nil {
			c.JSON(http.StatusUnauthorized, gin.H{"error": err.Error()})
			c.Abort()
			return
		}

		c.Set("user_id", claims.UserID)
		c.Set("user_email", claims.Email)
		c.Set("user_rol", claims.Rol)
		c.Next()
	}
}

func AdminMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		rol, exists := c.Get("user_rol")
		if !exists || rol != "admin" {
			c.JSON(http.StatusForbidden, gin.H{"error": "Acceso denegado - se requiere rol admin"})
			c.Abort()
			return
		}
		c.Next()
	}
}