feat: media duplicate purge, part 1 of 3: persisted purge settings and the purge API

internal/infrastructure/useCases/UpdatePurgeSettings.go

@@ -0,0 +1,49 @@
+package useCases
+
+import (
+	"RenewCMS/internal/domain/purge"
+	"time"
+)
+
+type UpdatePurgeSettingsCommand struct {
+	AutoPurgeEnabled      *bool
+	AutoPurgeIntervalDays *int
+}
+
+type UpdatePurgeSettingsUseCase struct {
+	repository purge.Repository
+	now        func() time.Time
+}
+
+func NewUpdatePurgeSettingsUseCase(repository purge.Repository, now func() time.Time) *UpdatePurgeSettingsUseCase {
+	return &UpdatePurgeSettingsUseCase{repository, now}
+}
+
+func (u *UpdatePurgeSettingsUseCase) Update(command UpdatePurgeSettingsCommand) (purge.Settings, error) {
+	if command.AutoPurgeIntervalDays != nil {
+		if err := purge.ValidateIntervalDays(*command.AutoPurgeIntervalDays); err != nil {
+			return purge.Settings{}, err
+		}
+	}
+
+	settings, err := u.repository.Get()
+	if err != nil {
+		return purge.Settings{}, err
+	}
+
+	if command.AutoPurgeEnabled != nil {
+		if *command.AutoPurgeEnabled && !settings.AutoPurgeEnabled {
+			enabledAt := u.now().UTC()
+			settings.EnabledAt = &enabledAt
+		}
+		settings.AutoPurgeEnabled = *command.AutoPurgeEnabled
+	}
+	if command.AutoPurgeIntervalDays != nil {
+		settings.AutoPurgeIntervalDays = *command.AutoPurgeIntervalDays
+	}
+
+	if err := u.repository.Save(settings); err != nil {
+		return purge.Settings{}, err
+	}
+	return settings, nil
+}