266 lines
6.9 KiB
Go
266 lines
6.9 KiB
Go
package entities
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import (
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"crypto/rand"
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"encoding/hex"
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"errors"
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"io"
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"net"
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"time"
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"github.com/google/uuid"
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"gorm.io/gorm"
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)
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// ApiUserStatus API用户状态
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const (
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ApiUserStatusNormal = "normal"
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ApiUserStatusFrozen = "frozen"
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)
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// ApiUser API用户（聚合根）
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type ApiUser struct {
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ID string `gorm:"primaryKey;type:varchar(64)" json:"id"`
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UserId string `gorm:"type:varchar(36);not null;uniqueIndex" json:"user_id"`
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AccessId string `gorm:"type:varchar(64);not null;uniqueIndex" json:"access_id"`
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SecretKey string `gorm:"type:varchar(128);not null" json:"secret_key"`
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Status string `gorm:"type:varchar(20);not null;default:'normal'" json:"status"`
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WhiteList []string `gorm:"type:json;serializer:json;default:'[]'" json:"white_list"` // 支持多个白名单
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// 余额预警配置
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BalanceAlertEnabled bool `gorm:"default:true" json:"balance_alert_enabled" comment:"是否启用余额预警"`
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BalanceAlertThreshold float64 `gorm:"default:200.00" json:"balance_alert_threshold" comment:"余额预警阈值"`
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AlertPhone string `gorm:"type:varchar(20)" json:"alert_phone" comment:"预警手机号"`
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LastLowBalanceAlert *time.Time `json:"last_low_balance_alert" comment:"最后低余额预警时间"`
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LastArrearsAlert *time.Time `json:"last_arrears_alert" comment:"最后欠费预警时间"`
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CreatedAt time.Time `gorm:"autoCreateTime" json:"created_at"`
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UpdatedAt time.Time `gorm:"autoUpdateTime" json:"updated_at"`
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}
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// IsWhiteListed 校验IP/域名是否在白名单
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func (u *ApiUser) IsWhiteListed(target string) bool {
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for _, w := range u.WhiteList {
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if w == target {
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return true
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}
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}
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return false
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}
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// IsActive 是否可用
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func (u *ApiUser) IsActive() bool {
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return u.Status == ApiUserStatusNormal
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}
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// IsFrozen 是否冻结
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func (u *ApiUser) IsFrozen() bool {
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return u.Status == ApiUserStatusFrozen
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}
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// NewApiUser 工厂方法
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func NewApiUser(userId string, defaultAlertEnabled bool, defaultAlertThreshold float64) (*ApiUser, error) {
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if userId == "" {
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return nil, errors.New("用户ID不能为空")
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}
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accessId, err := GenerateSecretId()
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if err != nil {
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return nil, err
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}
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secretKey, err := GenerateSecretKey()
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if err != nil {
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return nil, err
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}
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return &ApiUser{
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ID: uuid.New().String(),
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UserId: userId,
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AccessId: accessId,
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SecretKey: secretKey,
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Status: ApiUserStatusNormal,
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WhiteList: []string{},
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BalanceAlertEnabled: defaultAlertEnabled,
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BalanceAlertThreshold: defaultAlertThreshold,
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}, nil
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}
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// 领域行为
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func (u *ApiUser) Freeze() {
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u.Status = ApiUserStatusFrozen
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}
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func (u *ApiUser) Unfreeze() {
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u.Status = ApiUserStatusNormal
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}
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func (u *ApiUser) UpdateWhiteList(list []string) {
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u.WhiteList = list
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}
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// AddToWhiteList 新增白名单项（防御性校验）
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func (u *ApiUser) AddToWhiteList(entry string) error {
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if len(u.WhiteList) >= 10 {
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return errors.New("白名单最多只能有10个")
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}
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if net.ParseIP(entry) == nil {
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return errors.New("非法IP")
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}
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for _, w := range u.WhiteList {
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if w == entry {
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return errors.New("白名单已存在")
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}
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}
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u.WhiteList = append(u.WhiteList, entry)
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return nil
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}
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// BeforeUpdate GORM钩子：更新前确保WhiteList不为nil
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func (u *ApiUser) BeforeUpdate(tx *gorm.DB) error {
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if u.WhiteList == nil {
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u.WhiteList = []string{}
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}
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return nil
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}
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// RemoveFromWhiteList 删除白名单项
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func (u *ApiUser) RemoveFromWhiteList(entry string) error {
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newList := make([]string, 0, len(u.WhiteList))
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for _, w := range u.WhiteList {
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if w != entry {
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newList = append(newList, w)
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}
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}
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if len(newList) == len(u.WhiteList) {
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return errors.New("白名单不存在")
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}
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u.WhiteList = newList
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return nil
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}
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// 余额预警相关方法
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// UpdateBalanceAlertSettings 更新余额预警设置
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func (u *ApiUser) UpdateBalanceAlertSettings(enabled bool, threshold float64, phone string) error {
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if threshold < 0 {
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return errors.New("预警阈值不能为负数")
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}
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if phone != "" && len(phone) != 11 {
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return errors.New("手机号格式不正确")
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}
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u.BalanceAlertEnabled = enabled
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u.BalanceAlertThreshold = threshold
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u.AlertPhone = phone
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return nil
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}
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// ShouldSendLowBalanceAlert 是否应该发送低余额预警（24小时冷却期）
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func (u *ApiUser) ShouldSendLowBalanceAlert(balance float64) bool {
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if !u.BalanceAlertEnabled || u.AlertPhone == "" {
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return false
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}
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// 余额低于阈值
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if balance < u.BalanceAlertThreshold {
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// 检查是否已经发送过预警（避免频繁发送）
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if u.LastLowBalanceAlert != nil {
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// 如果距离上次预警不足24小时，不发送
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if time.Since(*u.LastLowBalanceAlert) < 24*time.Hour {
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return false
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}
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}
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return true
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}
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return false
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}
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// ShouldSendArrearsAlert 是否应该发送欠费预警（不受冷却期限制）
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func (u *ApiUser) ShouldSendArrearsAlert(balance float64) bool {
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if !u.BalanceAlertEnabled || u.AlertPhone == "" {
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return false
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}
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// 余额为负数（欠费）- 欠费预警不受冷却期限制
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if balance < 0 {
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return true
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}
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return false
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}
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// MarkLowBalanceAlertSent 标记低余额预警已发送
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func (u *ApiUser) MarkLowBalanceAlertSent() {
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now := time.Now()
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u.LastLowBalanceAlert = &now
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}
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// MarkArrearsAlertSent 标记欠费预警已发送
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func (u *ApiUser) MarkArrearsAlertSent() {
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now := time.Now()
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u.LastArrearsAlert = &now
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}
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// Validate 校验ApiUser聚合根的业务规则
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func (u *ApiUser) Validate() error {
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if u.UserId == "" {
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return errors.New("用户ID不能为空")
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}
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if u.AccessId == "" {
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return errors.New("AccessId不能为空")
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}
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if u.SecretKey == "" {
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return errors.New("SecretKey不能为空")
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}
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switch u.Status {
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case ApiUserStatusNormal, ApiUserStatusFrozen:
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// ok
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default:
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return errors.New("无效的用户状态")
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}
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if len(u.WhiteList) > 10 {
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return errors.New("白名单最多只能有10个")
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}
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for _, ip := range u.WhiteList {
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if net.ParseIP(ip) == nil {
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return errors.New("白名单项必须为合法IP地址: " + ip)
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}
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}
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return nil
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}
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// 生成AES-128密钥的函数，符合市面规范
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func GenerateSecretKey() (string, error) {
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key := make([]byte, 16) // 16字节密钥
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_, err := io.ReadFull(rand.Reader, key)
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if err != nil {
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return "", err
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}
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return hex.EncodeToString(key), nil
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}
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func GenerateSecretId() (string, error) {
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// 创建一个字节数组，用于存储随机数据
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bytes := make([]byte, 8) // 因为每个字节表示两个16进制字符
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// 读取随机字节到数组中
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_, err := rand.Read(bytes)
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if err != nil {
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return "", err
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}
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// 将字节数组转换为16进制字符串
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return hex.EncodeToString(bytes), nil
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}
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// TableName 指定数据库表名
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func (ApiUser) TableName() string {
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return "api_users"
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}
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// BeforeCreate GORM钩子：创建前自动生成UUID并确保WhiteList不为nil
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func (c *ApiUser) BeforeCreate(tx *gorm.DB) error {
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if c.ID == "" {
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c.ID = uuid.New().String()
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}
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if c.WhiteList == nil {
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c.WhiteList = []string{}
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}
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return nil
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}
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