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

internal/infrastructure/persistence/repositories/purgeSettingsRepository.go

@@ -0,0 +1,40 @@
+package persistence
+
+import (
+	domainPurge "RenewCMS/internal/domain/purge"
+	"RenewCMS/internal/infrastructure/persistence/mappers"
+	entity "RenewCMS/internal/infrastructure/persistence/models"
+	"errors"
+
+	"gorm.io/gorm"
+)
+
+const purgeSettingsRowID uint32 = 1
+
+type PurgeSettingsRepository struct {
+	db *gorm.DB
+}
+
+var _ domainPurge.Repository = &PurgeSettingsRepository{}
+
+func NewPurgeSettingsRepository(db *gorm.DB) *PurgeSettingsRepository {
+	return &PurgeSettingsRepository{db}
+}
+
+func (p *PurgeSettingsRepository) Get() (domainPurge.Settings, error) {
+	var model entity.PurgeSettings
+	err := p.db.First(&model, purgeSettingsRowID).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return domainPurge.DefaultSettings(), nil
+	}
+	if err != nil {
+		return domainPurge.Settings{}, err
+	}
+	return mappers.PurgeSettingsToDomain(model), nil
+}
+
+func (p *PurgeSettingsRepository) Save(settings domainPurge.Settings) error {
+	model := mappers.PurgeSettingsToModel(settings)
+	model.ID = purgeSettingsRowID
+	return p.db.Save(&model).Error
+}