FranklinWH-Toolbox/service/services/authServices.go

package services

import (
	"errors"
	"fmt"
	"fwh-toolbox-server/domain"
	"fwh-toolbox-server/dto"
	"fwh-toolbox-server/repositories"
	"fwh-toolbox-server/utils/casdoor"
	"time"

	"github.com/google/uuid"
	"go.uber.org/zap"
)

// 请求登录
func Login(param dto.LoginParam) (*domain.AuthInfo, error) {
	auth, err := casdoor.Signin(param.Code, param.State)
	if err != nil {
		return nil, err
	}

	// 生成 sid 并存 Redis（只存 refresh_token，access_token 可以缓存）
	sid := uuid.NewString()
	if err := repositories.StoreSession(sid, auth); err != nil {
		return nil, fmt.Errorf("store session err: %w", err)
	}

	return &domain.AuthInfo{
		SessionId:    sid,
		AccessToken:  auth.AccessToken,
		RefreshToken: auth.RefreshToken,
	}, nil
}

// 恢复会话 - 返回AccessToken
func GetSession(sid string) (string, error) {
	sess, err := repositories.GetSession(sid)
	if err != nil {
		return "", errors.New("session not found")
	}
	at := sess.AccessToken
	if !isExpired(at) {
		// 证书过期
		rt := sess.RefreshToken
		if !isExpired(rt) {
			// 刷新证书过期，返回空证书
			return "", nil
		}

		// 刷新证书
		at, err = RefreshToken(sid)
		if err != nil {
			return "", err
		}
	}

	return at, nil
}

// 刷新Token - 返回AccessToken
func RefreshToken(sid string) (string, error) {
	sess, err := repositories.GetSession(sid)
	if err != nil {
		return "", errors.New("session not found")
	}
	rt := sess.RefreshToken
	if rt == "" {
		return "", errors.New("no refresh token")
	}

	auth, err := casdoor.RefreshToken(rt)
	if err != nil {
		return "", err
	}

	if err := repositories.StoreSession(sid, auth); err != nil {
		return "", fmt.Errorf("store session err: %w", err)
	}

	return auth.AccessToken, nil
}

// 请求登出
func Logout(sid string) error {
	if sid != "" {
		return repositories.DeleteSession(sid)
	}

	return nil
}

// 检查证书是否过期
// true - 未过期
// false - 过期
func isExpired(token string) bool {
	claims, err := casdoor.ParseJwtToken(token)
	if err != nil {
		zap.L().Error("ParseJwtToken() error", zap.String("err", err.Error()))
		return false
	}
	if claims.ExpiresAt == nil {
		return false // 没有设置过期时间
	}
	return claims.ExpiresAt.Time.Before(time.Now())
}