feat: instance remove (#4345)

* feat(instance): add remove instance event with projections cleanup

* fix(instance): corrected used id to clean up projections

* fix merge

* fix: correct unit test projection names

* fix: current sequence of lists and query for ensuring keypair based projections

Co-authored-by: Livio Spring <livio.a@gmail.com>
Co-authored-by: Fabi <38692350+hifabienne@users.noreply.github.com>

internal/command/instance.go

@@ -606,3 +606,51 @@ func getSystemConfigWriteModel(ctx context.Context, filter preparation.FilterToQ
 	err = writeModel.Reduce()
 	return writeModel, err
 }
+
+func (c *Commands) RemoveInstance(ctx context.Context, id string) (*domain.ObjectDetails, error) {
+	instanceAgg := instance.NewAggregate(id)
+	cmds, err := preparation.PrepareCommands(ctx, c.eventstore.Filter, c.prepareRemoveInstance(instanceAgg))
+	if err != nil {
+		return nil, err
+	}
+
+	events, err := c.eventstore.Push(ctx, cmds...)
+	if err != nil {
+		return nil, err
+	}
+
+	return &domain.ObjectDetails{
+		Sequence:      events[len(events)-1].Sequence(),
+		EventDate:     events[len(events)-1].CreationDate(),
+		ResourceOwner: events[len(events)-1].Aggregate().InstanceID,
+	}, nil
+}
+
+func (c *Commands) prepareRemoveInstance(a *instance.Aggregate) preparation.Validation {
+	return func() (preparation.CreateCommands, error) {
+		return func(ctx context.Context, filter preparation.FilterToQueryReducer) ([]eventstore.Command, error) {
+			writeModel, err := c.getInstanceWriteModelByID(ctx, a.ID)
+			if err != nil {
+				return nil, errors.ThrowPreconditionFailed(err, "COMMA-pax9m3", "Errors.Instance.NotFound")
+			}
+			events := []eventstore.Command{instance.NewInstanceRemovedEvent(ctx, &a.Aggregate, writeModel.Name)}
+
+			domainsWriteModel, err := c.getInstanceDomainsWriteModel(ctx, a.ID)
+			if err == nil {
+				for _, domainName := range domainsWriteModel.Domains {
+					events = append(events, instance.NewDomainRemovedEvent(ctx, &a.Aggregate, domainName))
+				}
+			}
+			return events, nil
+		}, nil
+	}
+}
+
+func (c *Commands) getInstanceWriteModelByID(ctx context.Context, orgID string) (*InstanceWriteModel, error) {
+	instanceWriteModel := NewInstanceWriteModel(orgID)
+	err := c.eventstore.FilterToQueryReducer(ctx, instanceWriteModel)
+	if err != nil {
+		return nil, err
+	}
+	return instanceWriteModel, nil
+}

internal/command/instance_domain.go

@@ -154,8 +154,8 @@ func (c *Commands) updateConsoleRedirectURIs(ctx context.Context, filter prepara
 	)
 }
 
-//checkUpdateConsoleRedirectURIs validates if the required console uri is present in the redirect_uris and post_logout_redirect_uris
-//it will return true only if present in both list, otherwise false
+// checkUpdateConsoleRedirectURIs validates if the required console uri is present in the redirect_uris and post_logout_redirect_uris
+// it will return true only if present in both list, otherwise false
 func (c *Commands) checkUpdateConsoleRedirectURIs(instanceDomain string, redirectURIs, postLogoutRedirectURIs []string) bool {
 	redirectURI := http.BuildHTTP(instanceDomain, c.externalPort, c.externalSecure) + consoleRedirectPath
 	if !containsURI(redirectURIs, redirectURI) {
@@ -226,3 +226,12 @@ func containsURI(uris []string, uri string) bool {
 	}
 	return false
 }
+
+func (c *Commands) getInstanceDomainsWriteModel(ctx context.Context, instanceID string) (*InstanceDomainsWriteModel, error) {
+	domainsWriteModel := NewInstanceDomainsWriteModel(instanceID)
+	err := c.eventstore.FilterToQueryReducer(ctx, domainsWriteModel)
+	if err != nil {
+		return nil, err
+	}
+	return domainsWriteModel, nil
+}

internal/command/instance_domain_model.go

@@ -69,3 +69,65 @@ func (wm *InstanceDomainWriteModel) Query() *eventstore.SearchQueryBuilder {
 			instance.InstanceDomainRemovedEventType).
 		Builder()
 }
+
+type InstanceDomainsWriteModel struct {
+	eventstore.WriteModel
+
+	Domains []string
+}
+
+func (wm *InstanceDomainsWriteModel) Query() *eventstore.SearchQueryBuilder {
+	return eventstore.NewSearchQueryBuilder(eventstore.ColumnsEvent).
+		ResourceOwner(wm.ResourceOwner).
+		AddQuery().
+		AggregateTypes(instance.AggregateType).
+		AggregateIDs(wm.AggregateID).
+		EventTypes(
+			instance.InstanceDomainAddedEventType,
+			instance.InstanceDomainRemovedEventType).
+		Builder()
+}
+
+func NewInstanceDomainsWriteModel(instanceID string) *InstanceDomainsWriteModel {
+	return &InstanceDomainsWriteModel{
+		WriteModel: eventstore.WriteModel{
+			AggregateID:   instanceID,
+			ResourceOwner: instanceID,
+		},
+		Domains: []string{},
+	}
+}
+
+func (wm *InstanceDomainsWriteModel) AppendEvents(events ...eventstore.Event) {
+	for _, event := range events {
+		switch e := event.(type) {
+		case *instance.DomainAddedEvent:
+			wm.WriteModel.AppendEvents(e)
+		case *instance.DomainRemovedEvent:
+			wm.WriteModel.AppendEvents(e)
+		}
+	}
+}
+
+func (wm *InstanceDomainsWriteModel) Reduce() error {
+	for _, event := range wm.Events {
+		switch e := event.(type) {
+		case *instance.DomainAddedEvent:
+			wm.Domains = append(wm.Domains, e.Domain)
+		case *instance.DomainRemovedEvent:
+			wm.Domains = removeDomainFromDomains(wm.Domains, e.Domain)
+		}
+	}
+	return wm.WriteModel.Reduce()
+}
+
+func removeDomainFromDomains(items []string, domain string) []string {
+	for i := len(items) - 1; i >= 0; i-- {
+		if items[i] == domain {
+			items[i] = items[len(items)-1]
+			items[len(items)-1] = ""
+			items = items[:len(items)-1]
+		}
+	}
+	return items
+}