115 lines
3.2 KiB
Go
115 lines
3.2 KiB
Go
package usecase
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import (
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"context"
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"errors"
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"fmt"
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"apps/backend/internal/module/radar/domain"
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)
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/*
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PlanQuota 提供會員方案的雷達上限（spec §4.9）。
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介面留在 radar module 是為了不讓 radar 依賴 usage module；正式環境的實作在
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internal/svc 橋接既有方案定義，測試直接給固定值。
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*/
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type PlanQuota interface {
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RadarQuota(ctx context.Context, ownerUID int64) (maxActiveWatches, maxDailyOpportunities int, err error)
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}
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// FixedQuota 是測試與離線工具用的固定上限。
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type FixedQuota struct {
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MaxActiveWatches int
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MaxDailyOpportunities int
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}
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func (q FixedQuota) RadarQuota(context.Context, int64) (int, int, error) {
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return q.MaxActiveWatches, q.MaxDailyOpportunities, nil
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}
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/*
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沒接上 PlanQuota 時的保守預設 = 最低方案。
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失敗方向要選「少給」而不是「白送」：漏接線的結果是使用者看到上限提示來問客服，
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而不是所有人都拿到 Pro 的常駐監控量。
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*/
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var fallbackQuota = FixedQuota{MaxActiveWatches: 1, MaxDailyOpportunities: 5}
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func (s *Service) quota(ctx context.Context, ownerUID int64) (FixedQuota, error) {
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if s.Quota == nil {
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return fallbackQuota, nil
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}
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maxActive, maxDaily, err := s.Quota.RadarQuota(ctx, ownerUID)
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if err != nil {
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return FixedQuota{}, err
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}
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if maxActive <= 0 {
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maxActive = fallbackQuota.MaxActiveWatches
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}
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if maxDaily <= 0 {
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maxDaily = fallbackQuota.MaxDailyOpportunities
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}
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return FixedQuota{MaxActiveWatches: maxActive, MaxDailyOpportunities: maxDaily}, nil
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}
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func (s *Service) MaxActiveWatches(ctx context.Context, ownerUID int64) (int, error) {
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q, err := s.quota(ctx, ownerUID)
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if err != nil {
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return 0, err
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}
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return q.MaxActiveWatches, nil
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}
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func (s *Service) MaxDailyOpportunities(ctx context.Context, ownerUID int64) (int, error) {
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q, err := s.quota(ctx, ownerUID)
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if err != nil {
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return 0, err
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}
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return q.MaxDailyOpportunities, nil
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}
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/*
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assertCanActivate 是「變成 active」的兩道閘（SP-01、RW-01）。
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exceptWatchID 是正在恢復的那一筆：它目前不是 active，所以不會被算進 CountActive，
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帶進來只為了在訊息與計算上表達清楚。
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既有超額者不強制降級（spec §3.1）：這裡只擋「再多一個」。
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*/
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func (s *Service) assertCanActivate(ctx context.Context, ownerUID int64, exceptWatchID string) error {
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hasProfile, err := s.HasServiceProfile(ctx, ownerUID)
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if err != nil {
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return err
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}
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if !hasProfile {
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return fmt.Errorf(
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"%w: service profile required before activating a radar watch; fill in /api/v1/radar/service-profile first",
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domain.ErrValidation,
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)
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}
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maxActive, err := s.MaxActiveWatches(ctx, ownerUID)
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if err != nil {
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return err
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}
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active, err := s.Repo.CountActiveWatches(ctx, ownerUID)
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if err != nil {
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return err
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}
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if exceptWatchID != "" {
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if w, err := s.Repo.GetWatch(ctx, exceptWatchID); err == nil && w.Status == domain.WatchActive {
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active--
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} else if err != nil && !errors.Is(err, domain.ErrNotFound) {
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return err
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}
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}
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if active >= int64(maxActive) {
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return fmt.Errorf(
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"%w: active watch limit reached (%d of %d on your plan); pause an existing watch or upgrade your plan",
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domain.ErrValidation, active, maxActive,
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)
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}
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return nil
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}
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