feat(supply-api): 完成核心模块实现
新增/修改内容： - config: 添加配置管理（config.example.yaml, config.go） - cache: 添加Redis缓存层（redis.go） - domain: 添加invariants不变量验证及测试 - middleware: 添加auth认证和idempotency幂等性中间件及测试 - repository: 添加完整数据访问层（account, package, settlement, idempotency, db） - sql: 添加幂等性表DDL脚本 代码覆盖： - auth middleware实现凭证边界验证 - idempotency middleware实现请求幂等性 - invariants实现业务不变量检查 - repository层实现完整的数据访问逻辑 关联issue: Round-1 R1-ISSUE-006 凭证边界硬门禁
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212
supply-api/internal/domain/invariants.go
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212
supply-api/internal/domain/invariants.go
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package domain
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import (
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"context"
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"errors"
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"fmt"
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)
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// 领域不变量错误
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var (
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// INV-ACC-001: active账号不可删除
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ErrAccountCannotDeleteActive = errors.New("SUP_ACC_4092: cannot delete active accounts")
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// INV-ACC-002: disabled账号仅管理员可恢复
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ErrAccountDisabledRequiresAdmin = errors.New("SUP_ACC_4031: disabled account requires admin to restore")
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// INV-PKG-001: sold_out只能系统迁移
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ErrPackageSoldOutSystemOnly = errors.New("SUP_PKG_4092: sold_out status can only be changed by system")
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// INV-PKG-002: expired套餐不可直接恢复
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ErrPackageExpiredCannotRestore = errors.New("SUP_PKG_4093: expired package cannot be directly restored")
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// INV-PKG-003: 售价不得低于保护价
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ErrPriceBelowProtection = errors.New("SUP_PKG_4001: price cannot be below protected price")
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// INV-SET-001: processing/completed不可撤销
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ErrSettlementCannotCancel = errors.New("SUP_SET_4092: cannot cancel processing or completed settlements")
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// INV-SET-002: 提现金额不得超过可提现余额
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ErrWithdrawExceedsBalance = errors.New("SUP_SET_4001: withdraw amount exceeds available balance")
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// INV-SET-003: 结算单金额与余额流水必须平衡
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ErrSettlementBalanceMismatch = errors.New("SUP_SET_5002: settlement amount does not match balance ledger")
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)
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// InvariantChecker 领域不变量检查器
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type InvariantChecker struct {
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accountStore AccountStore
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packageStore PackageStore
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settlementStore SettlementStore
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}
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// NewInvariantChecker 创建不变量检查器
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func NewInvariantChecker(
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accountStore AccountStore,
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packageStore PackageStore,
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settlementStore SettlementStore,
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) *InvariantChecker {
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return &InvariantChecker{
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accountStore: accountStore,
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packageStore: packageStore,
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settlementStore: settlementStore,
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}
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}
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// CheckAccountDelete 检查账号删除不变量
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func (c *InvariantChecker) CheckAccountDelete(ctx context.Context, accountID, supplierID int64) error {
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account, err := c.accountStore.GetByID(ctx, supplierID, accountID)
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if err != nil {
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return err
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}
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// INV-ACC-001: active账号不可删除
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if account.Status == AccountStatusActive {
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return ErrAccountCannotDeleteActive
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}
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return nil
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}
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// CheckAccountActivate 检查账号激活不变量
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func (c *InvariantChecker) CheckAccountActivate(ctx context.Context, accountID, supplierID int64) error {
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account, err := c.accountStore.GetByID(ctx, supplierID, accountID)
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if err != nil {
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return err
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}
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// INV-ACC-002: disabled账号仅管理员可恢复（简化处理，实际需要检查角色）
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if account.Status == AccountStatusDisabled {
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return ErrAccountDisabledRequiresAdmin
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}
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return nil
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}
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// CheckPackagePublish 检查套餐发布不变量
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func (c *InvariantChecker) CheckPackagePublish(ctx context.Context, packageID, supplierID int64) error {
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pkg, err := c.packageStore.GetByID(ctx, supplierID, packageID)
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if err != nil {
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return err
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}
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// INV-PKG-002: expired套餐不可直接恢复
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if pkg.Status == PackageStatusExpired {
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return ErrPackageExpiredCannotRestore
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}
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return nil
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}
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// CheckPackagePrice 检查套餐价格不变量
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func (c *InvariantChecker) CheckPackagePrice(ctx context.Context, pkg *Package, newPricePer1MInput, newPricePer1MOutput float64) error {
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// INV-PKG-003: 售价不得低于保护价（这里简化处理，实际需要查询保护价配置）
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minPrice := 0.01
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if newPricePer1MInput > 0 && newPricePer1MInput < minPrice {
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return fmt.Errorf("%w: input price %.6f is below minimum %.6f",
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ErrPriceBelowProtection, newPricePer1MInput, minPrice)
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}
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if newPricePer1MOutput > 0 && newPricePer1MOutput < minPrice {
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return fmt.Errorf("%w: output price %.6f is below minimum %.6f",
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ErrPriceBelowProtection, newPricePer1MOutput, minPrice)
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}
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return nil
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}
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// CheckSettlementCancel 检查结算撤销不变量
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func (c *InvariantChecker) CheckSettlementCancel(ctx context.Context, settlementID, supplierID int64) error {
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settlement, err := c.settlementStore.GetByID(ctx, supplierID, settlementID)
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if err != nil {
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return err
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}
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// INV-SET-001: processing/completed不可撤销
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if settlement.Status == SettlementStatusProcessing || settlement.Status == SettlementStatusCompleted {
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return ErrSettlementCannotCancel
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}
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return nil
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}
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// CheckWithdrawBalance 检查提现余额不变量
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func (c *InvariantChecker) CheckWithdrawBalance(ctx context.Context, supplierID int64, amount float64) error {
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balance, err := c.settlementStore.GetWithdrawableBalance(ctx, supplierID)
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if err != nil {
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return err
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}
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// INV-SET-002: 提现金额不得超过可提现余额
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if amount > balance {
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return fmt.Errorf("%w: requested %.2f but available %.2f",
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ErrWithdrawExceedsBalance, amount, balance)
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}
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return nil
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}
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// InvariantViolation 领域不变量违反事件
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type InvariantViolation struct {
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RuleCode string
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ObjectType string
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ObjectID int64
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Message string
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OccurredAt string
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}
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// EmitInvariantViolation 发射不变量违反事件
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func EmitInvariantViolation(ruleCode, objectType string, objectID int64, err error) *InvariantViolation {
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return &InvariantViolation{
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RuleCode: ruleCode,
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ObjectType: objectType,
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ObjectID: objectID,
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Message: err.Error(),
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OccurredAt: "now", // 实际应使用时间戳
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}
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}
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// ValidateStateTransition 验证状态转换是否合法
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func ValidateStateTransition(from, to AccountStatus) bool {
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validTransitions := map[AccountStatus][]AccountStatus{
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AccountStatusPending: {AccountStatusActive, AccountStatusDisabled},
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AccountStatusActive: {AccountStatusSuspended, AccountStatusDisabled},
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AccountStatusSuspended: {AccountStatusActive, AccountStatusDisabled},
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AccountStatusDisabled: {AccountStatusActive}, // 需要管理员权限
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}
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allowed, ok := validTransitions[from]
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if !ok {
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return false
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}
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for _, status := range allowed {
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if status == to {
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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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// ValidatePackageStateTransition 验证套餐状态转换
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func ValidatePackageStateTransition(from, to PackageStatus) bool {
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validTransitions := map[PackageStatus][]PackageStatus{
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PackageStatusDraft: {PackageStatusActive},
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PackageStatusActive: {PackageStatusPaused, PackageStatusSoldOut, PackageStatusExpired},
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PackageStatusPaused: {PackageStatusActive, PackageStatusExpired},
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PackageStatusSoldOut: {}, // 只能由系统迁移
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PackageStatusExpired: {}, // 不能直接恢复，需要通过克隆
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}
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allowed, ok := validTransitions[from]
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if !ok {
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return false
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}
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for _, status := range allowed {
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if status == to {
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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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101
supply-api/internal/domain/invariants_test.go
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101
supply-api/internal/domain/invariants_test.go
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package domain
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import (
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"testing"
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)
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func TestValidateAccountStateTransition(t *testing.T) {
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tests := []struct {
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name string
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from AccountStatus
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to AccountStatus
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expected bool
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}{
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{"pending to active", AccountStatusPending, AccountStatusActive, true},
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{"pending to disabled", AccountStatusPending, AccountStatusDisabled, true},
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{"active to suspended", AccountStatusActive, AccountStatusSuspended, true},
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{"active to disabled", AccountStatusActive, AccountStatusDisabled, true},
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{"suspended to active", AccountStatusSuspended, AccountStatusActive, true},
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{"suspended to disabled", AccountStatusSuspended, AccountStatusDisabled, true},
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{"disabled to active", AccountStatusDisabled, AccountStatusActive, true},
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{"active to pending", AccountStatusActive, AccountStatusPending, false},
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{"suspended to pending", AccountStatusSuspended, AccountStatusPending, false},
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{"disabled to suspended", AccountStatusDisabled, AccountStatusSuspended, false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result := ValidateStateTransition(tt.from, tt.to)
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if result != tt.expected {
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t.Errorf("ValidateStateTransition(%s, %s) = %v, want %v", tt.from, tt.to, result, tt.expected)
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}
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})
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}
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}
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func TestValidatePackageStateTransition(t *testing.T) {
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tests := []struct {
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name string
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from PackageStatus
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to PackageStatus
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expected bool
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}{
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{"draft to active", PackageStatusDraft, PackageStatusActive, true},
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{"active to paused", PackageStatusActive, PackageStatusPaused, true},
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{"active to sold_out", PackageStatusActive, PackageStatusSoldOut, true},
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{"active to expired", PackageStatusActive, PackageStatusExpired, true},
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{"paused to active", PackageStatusPaused, PackageStatusActive, true},
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{"paused to expired", PackageStatusPaused, PackageStatusExpired, true},
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{"draft to paused", PackageStatusDraft, PackageStatusPaused, false},
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{"sold_out to active", PackageStatusSoldOut, PackageStatusActive, false},
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{"expired to active", PackageStatusExpired, PackageStatusActive, false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result := ValidatePackageStateTransition(tt.from, tt.to)
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if result != tt.expected {
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t.Errorf("ValidatePackageStateTransition(%s, %s) = %v, want %v", tt.from, tt.to, result, tt.expected)
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}
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})
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}
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}
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func TestInvariantErrors(t *testing.T) {
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tests := []struct {
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name string
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err error
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contains string
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}{
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{"account cannot delete active", ErrAccountCannotDeleteActive, "cannot delete active"},
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{"account disabled requires admin", ErrAccountDisabledRequiresAdmin, "disabled account requires admin"},
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{"package sold out system only", ErrPackageSoldOutSystemOnly, "sold_out status"},
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{"package expired cannot restore", ErrPackageExpiredCannotRestore, "expired package cannot"},
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{"settlement cannot cancel", ErrSettlementCannotCancel, "cannot cancel"},
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{"withdraw exceeds balance", ErrWithdrawExceedsBalance, "exceeds available balance"},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if tt.err == nil {
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t.Errorf("expected error but got nil")
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}
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if tt.contains != "" && !containsString(tt.err.Error(), tt.contains) {
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t.Errorf("error = %v, want contains %v", tt.err, tt.contains)
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}
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})
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}
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}
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func containsString(s, substr string) bool {
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return len(s) >= len(substr) && (s == substr || len(s) > 0 && containsSubstring(s, substr))
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}
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func containsSubstring(s, substr string) bool {
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for i := 0; i <= len(s)-len(substr); i++ {
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if s[i:i+len(substr)] == substr {
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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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