MonkeyCode/backend/internal/middleware/auth.go

package middleware

import (
	"log/slog"
	"net/http"

	"github.com/labstack/echo/v4"

	"github.com/chaitin/MonkeyCode/backend/consts"
	"github.com/chaitin/MonkeyCode/backend/domain"
	"github.com/chaitin/MonkeyCode/backend/pkg/session"
)

const (
	userKey = "session:user"
)

type AuthMiddleware struct {
	session *session.Session
	logger  *slog.Logger
}

func NewAuthMiddleware(session *session.Session, logger *slog.Logger) *AuthMiddleware {
	return &AuthMiddleware{
		session: session,
		logger:  logger,
	}
}

func (m *AuthMiddleware) Auth() echo.MiddlewareFunc {
	return func(next echo.HandlerFunc) echo.HandlerFunc {
		return func(c echo.Context) error {
			user, err := session.Get[domain.AdminUser](m.session, c, consts.SessionName)
			if err != nil {
				m.logger.Error("auth failed", "error", err)
				return c.String(http.StatusUnauthorized, "Unauthorized")
			}
			c.Set(userKey, &user)
			return next(c)
		}
	}
}

func GetUser(c echo.Context) *domain.AdminUser {
	return c.Get(userKey).(*domain.AdminUser)
}