feat: Sites feature backend

internal/infrastructure/useCases/DeleteSite.go

@@ -0,0 +1,68 @@
+package useCases
+
+import (
+	"RenewCMS/internal/domain/audit"
+	"RenewCMS/internal/domain/site"
+	"context"
+)
+
+type DeleteSiteUseCase struct {
+	siteRepository site.Repository
+	recorder       audit.Recorder
+}
+
+type DeleteSiteCommand struct {
+	ID              uint32
+	ReassignTo      *uint32
+	ReassignInvalid bool
+}
+
+func NewDeleteSiteUseCase(siteRepository site.Repository, recorder audit.Recorder) *DeleteSiteUseCase {
+	return &DeleteSiteUseCase{siteRepository, recorder}
+}
+
+func (u *DeleteSiteUseCase) Delete(ctx context.Context, command DeleteSiteCommand) error {
+	target, err := u.siteRepository.Get(command.ID)
+	if err != nil {
+		return err
+	}
+
+	event := audit.NewEvent(audit.ActionSiteDelete, audit.CategorySites)
+	event.Target = siteTarget(target)
+	if err := u.delete(target, command); err != nil {
+		recordFailure(ctx, u.recorder, event, err)
+		return err
+	}
+	u.recorder.Record(ctx, event)
+	return nil
+}
+
+func (u *DeleteSiteUseCase) delete(target site.Site, command DeleteSiteCommand) error {
+	if target.IsDefault {
+		return site.ErrDefaultSite
+	}
+	if target.ArticleCount == 0 {
+		return u.siteRepository.DeleteMovingArticles(target.ID, nil)
+	}
+	destination, err := u.destination(target, command)
+	if err != nil {
+		return err
+	}
+	return u.siteRepository.DeleteMovingArticles(target.ID, &destination)
+}
+
+func (u *DeleteSiteUseCase) destination(target site.Site, command DeleteSiteCommand) (uint32, error) {
+	if command.ReassignInvalid {
+		return 0, site.ErrInvalidReassign
+	}
+	if command.ReassignTo == nil {
+		return 0, site.ErrSiteHasArticles
+	}
+	if *command.ReassignTo == 0 || *command.ReassignTo == target.ID {
+		return 0, site.ErrInvalidReassign
+	}
+	if _, err := u.siteRepository.Get(*command.ReassignTo); err != nil {
+		return 0, err
+	}
+	return *command.ReassignTo, nil
+}