v0.1
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317
internal/domains/user/entities/contract_info.go
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317
internal/domains/user/entities/contract_info.go
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package entities
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import (
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"fmt"
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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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// ContractType 合同类型枚举
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type ContractType string
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const (
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ContractTypeCooperation ContractType = "cooperation" // 合作协议
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)
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// ContractInfo 合同信息聚合根
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// 存储企业签署的合同信息，一个企业可以有多个合同
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type ContractInfo struct {
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// 基础标识
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ID string `gorm:"primaryKey;type:varchar(36)" json:"id" comment:"合同信息唯一标识"`
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EnterpriseInfoID string `gorm:"type:varchar(36);not null;index" json:"enterprise_info_id" comment:"关联企业信息ID"`
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UserID string `gorm:"type:varchar(36);not null;index" json:"user_id" comment:"关联用户ID"`
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// 合同基本信息
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ContractName string `gorm:"type:varchar(255);not null" json:"contract_name" comment:"合同名称"`
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ContractType ContractType `gorm:"type:varchar(50);not null;index" json:"contract_type" comment:"合同类型"`
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ContractFileID string `gorm:"type:varchar(100);not null" json:"contract_file_id" comment:"合同文件ID"`
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ContractFileURL string `gorm:"type:varchar(500);not null" json:"contract_file_url" comment:"合同文件下载链接"`
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// 时间戳字段
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CreatedAt time.Time `gorm:"autoCreateTime" json:"created_at" comment:"创建时间"`
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UpdatedAt time.Time `gorm:"autoUpdateTime" json:"updated_at" comment:"更新时间"`
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DeletedAt gorm.DeletedAt `gorm:"index" json:"-" comment:"软删除时间"`
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// 关联关系
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EnterpriseInfo *EnterpriseInfo `gorm:"foreignKey:EnterpriseInfoID" json:"enterprise_info,omitempty" comment:"关联的企业信息"`
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// 领域事件 (不持久化)
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domainEvents []interface{} `gorm:"-" json:"-"`
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}
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// TableName 指定数据库表名
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func (ContractInfo) TableName() string {
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return "contract_infos"
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}
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// BeforeCreate GORM钩子：创建前自动生成UUID
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func (c *ContractInfo) 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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return nil
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}
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// ================ 工厂方法 ================
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// NewContractInfo 创建新的合同信息
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func NewContractInfo(enterpriseInfoID, userID, contractName string, contractType ContractType, contractFileID, contractFileURL string) (*ContractInfo, error) {
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if enterpriseInfoID == "" {
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return nil, fmt.Errorf("企业信息ID不能为空")
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}
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if userID == "" {
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return nil, fmt.Errorf("用户ID不能为空")
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}
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if contractName == "" {
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return nil, fmt.Errorf("合同名称不能为空")
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}
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if contractType == "" {
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return nil, fmt.Errorf("合同类型不能为空")
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}
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if contractFileID == "" {
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return nil, fmt.Errorf("合同文件ID不能为空")
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}
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if contractFileURL == "" {
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return nil, fmt.Errorf("合同文件URL不能为空")
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}
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// 验证合同类型
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if !isValidContractType(contractType) {
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return nil, fmt.Errorf("无效的合同类型: %s", contractType)
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}
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contractInfo := &ContractInfo{
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ID: uuid.New().String(),
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EnterpriseInfoID: enterpriseInfoID,
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UserID: userID,
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ContractName: contractName,
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ContractType: contractType,
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ContractFileID: contractFileID,
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ContractFileURL: contractFileURL,
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domainEvents: make([]interface{}, 0),
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}
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// 添加领域事件
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contractInfo.addDomainEvent(&ContractInfoCreatedEvent{
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ContractInfoID: contractInfo.ID,
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EnterpriseInfoID: enterpriseInfoID,
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UserID: userID,
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ContractName: contractName,
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ContractType: string(contractType),
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CreatedAt: time.Now(),
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})
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return contractInfo, nil
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}
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// ================ 聚合根核心方法 ================
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// UpdateContractInfo 更新合同信息
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func (c *ContractInfo) UpdateContractInfo(contractName, contractFileID, contractFileURL string) error {
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// 验证输入参数
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if contractName == "" {
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return fmt.Errorf("合同名称不能为空")
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}
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if contractFileID == "" {
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return fmt.Errorf("合同文件ID不能为空")
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}
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if contractFileURL == "" {
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return fmt.Errorf("合同文件URL不能为空")
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}
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// 记录原始值用于事件
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oldContractName := c.ContractName
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oldContractFileID := c.ContractFileID
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// 更新字段
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c.ContractName = contractName
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c.ContractFileID = contractFileID
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c.ContractFileURL = contractFileURL
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// 添加领域事件
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c.addDomainEvent(&ContractInfoUpdatedEvent{
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ContractInfoID: c.ID,
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EnterpriseInfoID: c.EnterpriseInfoID,
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UserID: c.UserID,
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OldContractName: oldContractName,
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NewContractName: contractName,
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OldContractFileID: oldContractFileID,
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NewContractFileID: contractFileID,
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UpdatedAt: time.Now(),
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})
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return nil
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}
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// DeleteContract 删除合同
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func (c *ContractInfo) DeleteContract() error {
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// 添加领域事件
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c.addDomainEvent(&ContractInfoDeletedEvent{
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ContractInfoID: c.ID,
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EnterpriseInfoID: c.EnterpriseInfoID,
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UserID: c.UserID,
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ContractName: c.ContractName,
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ContractType: string(c.ContractType),
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DeletedAt: time.Now(),
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})
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return nil
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}
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// ================ 业务规则验证 ================
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// ValidateBusinessRules 验证业务规则
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func (c *ContractInfo) ValidateBusinessRules() error {
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// 基础字段验证
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if err := c.validateBasicFields(); err != nil {
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return fmt.Errorf("基础字段验证失败: %w", err)
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}
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// 业务规则验证
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if err := c.validateBusinessLogic(); err != nil {
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return fmt.Errorf("业务规则验证失败: %w", err)
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}
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return nil
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}
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// validateBasicFields 验证基础字段
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func (c *ContractInfo) validateBasicFields() error {
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if c.EnterpriseInfoID == "" {
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return fmt.Errorf("企业信息ID不能为空")
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}
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if c.UserID == "" {
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return fmt.Errorf("用户ID不能为空")
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}
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if c.ContractName == "" {
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return fmt.Errorf("合同名称不能为空")
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}
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if c.ContractType == "" {
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return fmt.Errorf("合同类型不能为空")
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}
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if c.ContractFileID == "" {
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return fmt.Errorf("合同文件ID不能为空")
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}
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if c.ContractFileURL == "" {
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return fmt.Errorf("合同文件URL不能为空")
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}
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// 合同类型验证
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if !isValidContractType(c.ContractType) {
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return fmt.Errorf("无效的合同类型: %s", c.ContractType)
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}
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return nil
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}
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// validateBusinessLogic 验证业务逻辑
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func (c *ContractInfo) validateBusinessLogic() error {
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// 合同名称长度限制
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if len(c.ContractName) > 255 {
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return fmt.Errorf("合同名称长度不能超过255个字符")
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}
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// 合同文件URL格式验证
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if !isValidURL(c.ContractFileURL) {
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return fmt.Errorf("合同文件URL格式无效")
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}
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return nil
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}
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// ================ 查询方法 ================
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// GetContractTypeName 获取合同类型名称
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func (c *ContractInfo) GetContractTypeName() string {
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switch c.ContractType {
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case ContractTypeCooperation:
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return "合作协议"
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default:
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return "未知类型"
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}
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}
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// IsCooperationContract 检查是否为合作协议
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func (c *ContractInfo) IsCooperationContract() bool {
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return c.ContractType == ContractTypeCooperation
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}
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// ================ 领域事件管理 ================
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// addDomainEvent 添加领域事件
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func (c *ContractInfo) addDomainEvent(event interface{}) {
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if c.domainEvents == nil {
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c.domainEvents = make([]interface{}, 0)
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}
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c.domainEvents = append(c.domainEvents, event)
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}
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// GetDomainEvents 获取领域事件
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func (c *ContractInfo) GetDomainEvents() []interface{} {
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return c.domainEvents
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}
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// ClearDomainEvents 清除领域事件
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func (c *ContractInfo) ClearDomainEvents() {
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c.domainEvents = make([]interface{}, 0)
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}
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// ================ 私有验证方法 ================
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// isValidContractType 验证合同类型
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func isValidContractType(contractType ContractType) bool {
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switch contractType {
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case ContractTypeCooperation:
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return true
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default:
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return false
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}
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}
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// isValidURL 验证URL格式
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func isValidURL(url string) bool {
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// 简单的URL格式验证
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if len(url) < 10 {
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return false
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}
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if url[:7] != "http://" && url[:8] != "https://" {
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return false
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}
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return true
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}
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// ================ 领域事件定义 ================
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// ContractInfoCreatedEvent 合同信息创建事件
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type ContractInfoCreatedEvent struct {
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ContractInfoID string `json:"contract_info_id"`
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EnterpriseInfoID string `json:"enterprise_info_id"`
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UserID string `json:"user_id"`
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ContractName string `json:"contract_name"`
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ContractType string `json:"contract_type"`
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CreatedAt time.Time `json:"created_at"`
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}
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// ContractInfoUpdatedEvent 合同信息更新事件
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type ContractInfoUpdatedEvent struct {
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ContractInfoID string `json:"contract_info_id"`
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EnterpriseInfoID string `json:"enterprise_info_id"`
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UserID string `json:"user_id"`
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OldContractName string `json:"old_contract_name"`
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NewContractName string `json:"new_contract_name"`
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OldContractFileID string `json:"old_contract_file_id"`
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NewContractFileID string `json:"new_contract_file_id"`
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UpdatedAt time.Time `json:"updated_at"`
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}
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// ContractInfoDeletedEvent 合同信息删除事件
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type ContractInfoDeletedEvent struct {
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ContractInfoID string `json:"contract_info_id"`
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EnterpriseInfoID string `json:"enterprise_info_id"`
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UserID string `json:"user_id"`
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ContractName string `json:"contract_name"`
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ContractType string `json:"contract_type"`
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DeletedAt time.Time `json:"deleted_at"`
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}
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