3af9940b85
- gofmt: realign AffiliateDetail struct tags in affiliate_service.go - ineffassign: remove dead seenCompleted assignment before return in account_test_service.go
449 lines
15 KiB
Go
449 lines
15 KiB
Go
package service
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import (
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"context"
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"errors"
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"math"
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"strings"
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"time"
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infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
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"github.com/Wei-Shaw/sub2api/internal/pkg/logger"
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)
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var (
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ErrAffiliateProfileNotFound = infraerrors.NotFound("AFFILIATE_PROFILE_NOT_FOUND", "affiliate profile not found")
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ErrAffiliateCodeInvalid = infraerrors.BadRequest("AFFILIATE_CODE_INVALID", "invalid affiliate code")
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ErrAffiliateCodeTaken = infraerrors.Conflict("AFFILIATE_CODE_TAKEN", "affiliate code already in use")
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ErrAffiliateAlreadyBound = infraerrors.Conflict("AFFILIATE_ALREADY_BOUND", "affiliate inviter already bound")
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ErrAffiliateQuotaEmpty = infraerrors.BadRequest("AFFILIATE_QUOTA_EMPTY", "no affiliate quota available to transfer")
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)
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const (
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affiliateInviteesLimit = 100
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// AffiliateCodeMinLength / AffiliateCodeMaxLength bound both system-generated
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// 12-char codes and admin-customized codes (e.g. "VIP2026").
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AffiliateCodeMinLength = 4
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AffiliateCodeMaxLength = 32
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)
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// affiliateCodeValidChar accepts uppercase letters, digits, underscore and dash.
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// All input passes through strings.ToUpper before validation, so lowercase from
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// users is normalized — admins may supply mixed case in their UI.
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var affiliateCodeValidChar = func() [256]bool {
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var tbl [256]bool
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for c := byte('A'); c <= 'Z'; c++ {
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tbl[c] = true
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}
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for c := byte('0'); c <= '9'; c++ {
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tbl[c] = true
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}
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tbl['_'] = true
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tbl['-'] = true
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return tbl
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}()
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// isValidAffiliateCodeFormat validates code format for both binding (user input)
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// and admin updates. Caller is expected to upper-case the input first.
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func isValidAffiliateCodeFormat(code string) bool {
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if len(code) < AffiliateCodeMinLength || len(code) > AffiliateCodeMaxLength {
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return false
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}
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for i := 0; i < len(code); i++ {
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if !affiliateCodeValidChar[code[i]] {
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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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type AffiliateSummary struct {
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UserID int64 `json:"user_id"`
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AffCode string `json:"aff_code"`
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AffCodeCustom bool `json:"aff_code_custom"`
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AffRebateRatePercent *float64 `json:"aff_rebate_rate_percent,omitempty"`
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InviterID *int64 `json:"inviter_id,omitempty"`
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AffCount int `json:"aff_count"`
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AffQuota float64 `json:"aff_quota"`
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AffHistoryQuota float64 `json:"aff_history_quota"`
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CreatedAt time.Time `json:"created_at"`
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UpdatedAt time.Time `json:"updated_at"`
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}
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type AffiliateInvitee struct {
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UserID int64 `json:"user_id"`
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Email string `json:"email"`
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Username string `json:"username"`
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CreatedAt *time.Time `json:"created_at,omitempty"`
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}
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type AffiliateDetail struct {
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UserID int64 `json:"user_id"`
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AffCode string `json:"aff_code"`
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InviterID *int64 `json:"inviter_id,omitempty"`
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AffCount int `json:"aff_count"`
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AffQuota float64 `json:"aff_quota"`
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AffHistoryQuota float64 `json:"aff_history_quota"`
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// EffectiveRebateRatePercent 是当前用户作为邀请人时实际生效的返利比例：
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// 优先用户自己的专属比例（aff_rebate_rate_percent），否则回退到全局比例。
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// 用于在用户的 /affiliate 页面直观展示「分享后能拿到多少」。
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EffectiveRebateRatePercent float64 `json:"effective_rebate_rate_percent"`
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Invitees []AffiliateInvitee `json:"invitees"`
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}
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type AffiliateRepository interface {
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EnsureUserAffiliate(ctx context.Context, userID int64) (*AffiliateSummary, error)
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GetAffiliateByCode(ctx context.Context, code string) (*AffiliateSummary, error)
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BindInviter(ctx context.Context, userID, inviterID int64) (bool, error)
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AccrueQuota(ctx context.Context, inviterID, inviteeUserID int64, amount float64) (bool, error)
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TransferQuotaToBalance(ctx context.Context, userID int64) (float64, float64, error)
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ListInvitees(ctx context.Context, inviterID int64, limit int) ([]AffiliateInvitee, error)
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// 管理端：用户级专属配置
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UpdateUserAffCode(ctx context.Context, userID int64, newCode string) error
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ResetUserAffCode(ctx context.Context, userID int64) (string, error)
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SetUserRebateRate(ctx context.Context, userID int64, ratePercent *float64) error
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BatchSetUserRebateRate(ctx context.Context, userIDs []int64, ratePercent *float64) error
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ListUsersWithCustomSettings(ctx context.Context, filter AffiliateAdminFilter) ([]AffiliateAdminEntry, int64, error)
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}
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// AffiliateAdminFilter 列表筛选条件
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type AffiliateAdminFilter struct {
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Search string
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Page int
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PageSize int
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}
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// AffiliateAdminEntry 专属用户列表条目
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type AffiliateAdminEntry struct {
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UserID int64 `json:"user_id"`
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Email string `json:"email"`
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Username string `json:"username"`
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AffCode string `json:"aff_code"`
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AffCodeCustom bool `json:"aff_code_custom"`
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AffRebateRatePercent *float64 `json:"aff_rebate_rate_percent,omitempty"`
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AffCount int `json:"aff_count"`
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}
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type AffiliateService struct {
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repo AffiliateRepository
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settingService *SettingService
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authCacheInvalidator APIKeyAuthCacheInvalidator
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billingCacheService *BillingCacheService
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}
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func NewAffiliateService(repo AffiliateRepository, settingService *SettingService, authCacheInvalidator APIKeyAuthCacheInvalidator, billingCacheService *BillingCacheService) *AffiliateService {
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return &AffiliateService{
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repo: repo,
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settingService: settingService,
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authCacheInvalidator: authCacheInvalidator,
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billingCacheService: billingCacheService,
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}
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}
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// IsEnabled reports whether the affiliate (邀请返利) feature is turned on.
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func (s *AffiliateService) IsEnabled(ctx context.Context) bool {
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if s == nil || s.settingService == nil {
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return AffiliateEnabledDefault
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}
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return s.settingService.IsAffiliateEnabled(ctx)
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}
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func (s *AffiliateService) EnsureUserAffiliate(ctx context.Context, userID int64) (*AffiliateSummary, error) {
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if userID <= 0 {
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return nil, infraerrors.BadRequest("INVALID_USER", "invalid user")
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}
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if s == nil || s.repo == nil {
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return nil, infraerrors.ServiceUnavailable("SERVICE_UNAVAILABLE", "affiliate service unavailable")
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}
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return s.repo.EnsureUserAffiliate(ctx, userID)
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}
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func (s *AffiliateService) GetAffiliateDetail(ctx context.Context, userID int64) (*AffiliateDetail, error) {
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summary, err := s.EnsureUserAffiliate(ctx, userID)
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if err != nil {
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return nil, err
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}
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invitees, err := s.listInvitees(ctx, userID)
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if err != nil {
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return nil, err
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}
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return &AffiliateDetail{
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UserID: summary.UserID,
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AffCode: summary.AffCode,
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InviterID: summary.InviterID,
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AffCount: summary.AffCount,
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AffQuota: summary.AffQuota,
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AffHistoryQuota: summary.AffHistoryQuota,
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EffectiveRebateRatePercent: s.resolveRebateRatePercent(ctx, summary),
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Invitees: invitees,
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}, nil
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}
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func (s *AffiliateService) BindInviterByCode(ctx context.Context, userID int64, rawCode string) error {
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code := strings.ToUpper(strings.TrimSpace(rawCode))
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if code == "" {
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return nil
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}
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if s == nil || s.repo == nil {
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return infraerrors.ServiceUnavailable("SERVICE_UNAVAILABLE", "affiliate service unavailable")
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}
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// 总开关关闭时，注册阶段静默忽略 aff 参数（不报错，避免阻断注册流程）
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if !s.IsEnabled(ctx) {
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return nil
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}
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if !isValidAffiliateCodeFormat(code) {
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return ErrAffiliateCodeInvalid
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}
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selfSummary, err := s.repo.EnsureUserAffiliate(ctx, userID)
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if err != nil {
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return err
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}
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if selfSummary.InviterID != nil {
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return nil
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}
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inviterSummary, err := s.repo.GetAffiliateByCode(ctx, code)
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if err != nil {
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if errors.Is(err, ErrAffiliateProfileNotFound) {
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return ErrAffiliateCodeInvalid
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}
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return err
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}
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if inviterSummary == nil || inviterSummary.UserID <= 0 || inviterSummary.UserID == userID {
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return ErrAffiliateCodeInvalid
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}
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bound, err := s.repo.BindInviter(ctx, userID, inviterSummary.UserID)
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if err != nil {
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return err
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}
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if !bound {
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return ErrAffiliateAlreadyBound
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}
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return nil
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}
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func (s *AffiliateService) AccrueInviteRebate(ctx context.Context, inviteeUserID int64, baseRechargeAmount float64) (float64, error) {
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if s == nil || s.repo == nil {
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return 0, nil
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}
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if inviteeUserID <= 0 || baseRechargeAmount <= 0 || math.IsNaN(baseRechargeAmount) || math.IsInf(baseRechargeAmount, 0) {
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return 0, nil
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}
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// 总开关关闭时，新充值不再产生返利
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if !s.IsEnabled(ctx) {
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return 0, nil
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}
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inviteeSummary, err := s.repo.EnsureUserAffiliate(ctx, inviteeUserID)
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if err != nil {
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return 0, err
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}
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if inviteeSummary.InviterID == nil || *inviteeSummary.InviterID <= 0 {
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return 0, nil
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}
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// 加载邀请人 profile，优先使用专属比例（覆盖全局）
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inviterSummary, err := s.repo.EnsureUserAffiliate(ctx, *inviteeSummary.InviterID)
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if err != nil {
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return 0, err
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}
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rebateRatePercent := s.resolveRebateRatePercent(ctx, inviterSummary)
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rebate := roundTo(baseRechargeAmount*(rebateRatePercent/100), 8)
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if rebate <= 0 {
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return 0, nil
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}
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applied, err := s.repo.AccrueQuota(ctx, *inviteeSummary.InviterID, inviteeUserID, rebate)
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if err != nil {
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return 0, err
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}
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if !applied {
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return 0, nil
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}
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return rebate, nil
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}
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// resolveRebateRatePercent returns the inviter's exclusive rate when set,
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// otherwise the global setting value (clamped to [Min, Max]).
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func (s *AffiliateService) resolveRebateRatePercent(ctx context.Context, inviter *AffiliateSummary) float64 {
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if inviter != nil && inviter.AffRebateRatePercent != nil {
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v := *inviter.AffRebateRatePercent
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if math.IsNaN(v) || math.IsInf(v, 0) {
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return s.globalRebateRatePercent(ctx)
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}
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return clampAffiliateRebateRate(v)
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}
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return s.globalRebateRatePercent(ctx)
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}
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// globalRebateRatePercent reads the system-wide rebate rate via SettingService,
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// returning the documented default when SettingService is unavailable.
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func (s *AffiliateService) globalRebateRatePercent(ctx context.Context) float64 {
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if s == nil || s.settingService == nil {
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return AffiliateRebateRateDefault
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}
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return s.settingService.GetAffiliateRebateRatePercent(ctx)
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}
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func (s *AffiliateService) TransferAffiliateQuota(ctx context.Context, userID int64) (float64, float64, error) {
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if s == nil || s.repo == nil {
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return 0, 0, infraerrors.ServiceUnavailable("SERVICE_UNAVAILABLE", "affiliate service unavailable")
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}
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transferred, balance, err := s.repo.TransferQuotaToBalance(ctx, userID)
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if err != nil {
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return 0, 0, err
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}
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if transferred > 0 {
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s.invalidateAffiliateCaches(ctx, userID)
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}
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return transferred, balance, nil
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}
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func (s *AffiliateService) listInvitees(ctx context.Context, inviterID int64) ([]AffiliateInvitee, error) {
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if s == nil || s.repo == nil {
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return nil, infraerrors.ServiceUnavailable("SERVICE_UNAVAILABLE", "affiliate service unavailable")
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}
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invitees, err := s.repo.ListInvitees(ctx, inviterID, affiliateInviteesLimit)
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if err != nil {
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return nil, err
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}
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for i := range invitees {
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invitees[i].Email = maskEmail(invitees[i].Email)
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}
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return invitees, nil
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}
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func roundTo(v float64, scale int) float64 {
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factor := math.Pow10(scale)
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return math.Round(v*factor) / factor
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}
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func maskEmail(email string) string {
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email = strings.TrimSpace(email)
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if email == "" {
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return ""
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}
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at := strings.Index(email, "@")
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if at <= 0 || at >= len(email)-1 {
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return "***"
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}
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local := email[:at]
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domain := email[at+1:]
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dot := strings.LastIndex(domain, ".")
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maskedLocal := maskSegment(local)
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if dot <= 0 || dot >= len(domain)-1 {
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return maskedLocal + "@" + maskSegment(domain)
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}
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domainName := domain[:dot]
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tld := domain[dot:]
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return maskedLocal + "@" + maskSegment(domainName) + tld
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}
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func maskSegment(s string) string {
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r := []rune(s)
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if len(r) == 0 {
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return "***"
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}
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if len(r) == 1 {
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return string(r[0]) + "***"
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}
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return string(r[0]) + "***"
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}
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func (s *AffiliateService) invalidateAffiliateCaches(ctx context.Context, userID int64) {
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if s.authCacheInvalidator != nil {
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s.authCacheInvalidator.InvalidateAuthCacheByUserID(ctx, userID)
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}
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if s.billingCacheService != nil {
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if err := s.billingCacheService.InvalidateUserBalance(ctx, userID); err != nil {
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logger.LegacyPrintf("service.affiliate", "[Affiliate] Failed to invalidate billing cache for user %d: %v", userID, err)
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}
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}
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}
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// =========================
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// Admin: 专属配置管理
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// =========================
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// validateExclusiveRate ensures a per-user override is finite and within
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// [Min, Max]. nil is always valid (means "clear / fall back to global").
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func validateExclusiveRate(ratePercent *float64) error {
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if ratePercent == nil {
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return nil
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}
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v := *ratePercent
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if math.IsNaN(v) || math.IsInf(v, 0) {
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return infraerrors.BadRequest("INVALID_RATE", "invalid rebate rate")
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}
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if v < AffiliateRebateRateMin || v > AffiliateRebateRateMax {
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return infraerrors.BadRequest("INVALID_RATE", "rebate rate out of range")
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}
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return nil
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}
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// AdminUpdateUserAffCode 管理员改写用户的邀请码（专属邀请码）。
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func (s *AffiliateService) AdminUpdateUserAffCode(ctx context.Context, userID int64, rawCode string) error {
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if s == nil || s.repo == nil {
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return infraerrors.ServiceUnavailable("SERVICE_UNAVAILABLE", "affiliate service unavailable")
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}
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code := strings.ToUpper(strings.TrimSpace(rawCode))
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if !isValidAffiliateCodeFormat(code) {
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return ErrAffiliateCodeInvalid
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}
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return s.repo.UpdateUserAffCode(ctx, userID, code)
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}
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// AdminResetUserAffCode 重置用户邀请码为系统随机码。
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func (s *AffiliateService) AdminResetUserAffCode(ctx context.Context, userID int64) (string, error) {
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if s == nil || s.repo == nil {
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return "", infraerrors.ServiceUnavailable("SERVICE_UNAVAILABLE", "affiliate service unavailable")
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}
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return s.repo.ResetUserAffCode(ctx, userID)
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}
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// AdminSetUserRebateRate 设置/清除用户专属返利比例。ratePercent==nil 表示清除。
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func (s *AffiliateService) AdminSetUserRebateRate(ctx context.Context, userID int64, ratePercent *float64) error {
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if s == nil || s.repo == nil {
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return infraerrors.ServiceUnavailable("SERVICE_UNAVAILABLE", "affiliate service unavailable")
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}
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if err := validateExclusiveRate(ratePercent); err != nil {
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return err
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}
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return s.repo.SetUserRebateRate(ctx, userID, ratePercent)
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}
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// AdminBatchSetUserRebateRate 批量设置/清除用户专属返利比例。
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func (s *AffiliateService) AdminBatchSetUserRebateRate(ctx context.Context, userIDs []int64, ratePercent *float64) error {
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if s == nil || s.repo == nil {
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return infraerrors.ServiceUnavailable("SERVICE_UNAVAILABLE", "affiliate service unavailable")
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}
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if err := validateExclusiveRate(ratePercent); err != nil {
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return err
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}
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cleaned := make([]int64, 0, len(userIDs))
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for _, uid := range userIDs {
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if uid > 0 {
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cleaned = append(cleaned, uid)
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}
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}
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if len(cleaned) == 0 {
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return nil
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}
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return s.repo.BatchSetUserRebateRate(ctx, cleaned, ratePercent)
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}
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// AdminListCustomUsers 列出有专属配置的用户。
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func (s *AffiliateService) AdminListCustomUsers(ctx context.Context, filter AffiliateAdminFilter) ([]AffiliateAdminEntry, int64, error) {
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if s == nil || s.repo == nil {
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return nil, 0, infraerrors.ServiceUnavailable("SERVICE_UNAVAILABLE", "affiliate service unavailable")
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}
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return s.repo.ListUsersWithCustomSettings(ctx, filter)
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}
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