perms-system-server/internal/logic/auth/logoutLogic.go

// Code scaffolded by goctl. Safe to edit.
// goctl 1.10.0

package auth

import (
	"context"
	"errors"
	"fmt"

	"perms-system-server/internal/middleware"
	userModel "perms-system-server/internal/model/user"
	"perms-system-server/internal/response"
	"perms-system-server/internal/svc"

	"github.com/zeromicro/go-zero/core/limit"
	"github.com/zeromicro/go-zero/core/logx"
)

type LogoutLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewLogoutLogic(ctx context.Context, svcCtx *svc.ServiceContext) *LogoutLogic {
	return &LogoutLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

// Logout 用户注销。递增当前用户的 tokenVersion 使所有已签发的 access/refresh 令牌立即失效，并清除用户缓存。
func (l *LogoutLogic) Logout() error {
	userId := middleware.GetUserId(l.ctx)
	if userId == 0 {
		return response.ErrUnauthorized("未登录")
	}

	if l.svcCtx.TokenOpLimiter != nil {
		code, _ := l.svcCtx.TokenOpLimiter.Take(fmt.Sprintf("logout:%d", userId))
		if code == limit.OverQuota {
			return response.ErrTooManyRequests("操作过于频繁，请稍后再试")
		}
	}

	if _, err := l.svcCtx.SysUserModel.IncrementTokenVersion(l.ctx, userId); err != nil {
		// 审计 L-R10-3：IncrementTokenVersion 在目标用户已被并发删除时会返 ErrUpdateConflict。
		// Logout 的语义目标本就是"让该账号的旧令牌立即失效"，用户已经消失等同语义已达成，
		// 按幂等成功处理并继续清缓存，不要让一次正常的注销因为极罕见的删号竞态回 500。
		if !errors.Is(err, userModel.ErrUpdateConflict) {
			return err
		}
		logx.WithContext(l.ctx).Infof("logout on already-deleted user userId=%d, treated as idempotent success", userId)
	}

	l.svcCtx.UserDetailsLoader.Clean(l.ctx, userId)
	return nil
}