fix(event handling): use internal pubsub for view update (#1118)

* start sub

* start implement subsciptions

* start subscription

* implementation for member done

* admin done

* fix: tests

* extend handlers

* prepary notification

* no errors in adminapi

* changed current sequence in all packages

* ignore mocks

* works

* subscriptions as singleton

* tests

* refactor: rename function scope var

internal/auth/repository/eventsourcing/handler/user.go

@@ -2,45 +2,83 @@ package handler
 
 import (
 	"context"
-	iam_es "github.com/caos/zitadel/internal/iam/repository/eventsourcing"
 
+	"github.com/caos/logging"
+	"github.com/caos/zitadel/internal/eventstore"
+	"github.com/caos/zitadel/internal/eventstore/models"
 	es_models "github.com/caos/zitadel/internal/eventstore/models"
+	"github.com/caos/zitadel/internal/eventstore/query"
+	"github.com/caos/zitadel/internal/eventstore/spooler"
+	iam_es "github.com/caos/zitadel/internal/iam/repository/eventsourcing"
 	org_model "github.com/caos/zitadel/internal/org/model"
 	org_events "github.com/caos/zitadel/internal/org/repository/eventsourcing"
 	org_es_model "github.com/caos/zitadel/internal/org/repository/eventsourcing/model"
 	es_model "github.com/caos/zitadel/internal/user/repository/eventsourcing/model"
-
-	"github.com/caos/logging"
-
-	"github.com/caos/zitadel/internal/eventstore"
-	"github.com/caos/zitadel/internal/eventstore/models"
-	"github.com/caos/zitadel/internal/eventstore/spooler"
 	view_model "github.com/caos/zitadel/internal/user/repository/view/model"
 )
 
-type User struct {
-	handler
-	eventstore eventstore.Eventstore
-	orgEvents  *org_events.OrgEventstore
-	iamEvents  *iam_es.IAMEventstore
-	iamID      string
-}
-
 const (
 	userTable = "auth.users"
 )
 
+type User struct {
+	handler
+	orgEvents    *org_events.OrgEventstore
+	iamEvents    *iam_es.IAMEventstore
+	iamID        string
+	subscription *eventstore.Subscription
+}
+
+func newUser(
+	handler handler,
+	orgEvents *org_events.OrgEventstore,
+	iamEvents *iam_es.IAMEventstore,
+	iamID string,
+) *User {
+	h := &User{
+		handler:   handler,
+		orgEvents: orgEvents,
+		iamEvents: iamEvents,
+		iamID:     iamID,
+	}
+
+	h.subscribe()
+
+	return h
+}
+
+func (k *User) subscribe() {
+	k.subscription = k.es.Subscribe(k.AggregateTypes()...)
+	go func() {
+		for event := range k.subscription.Events {
+			query.ReduceEvent(k, event)
+		}
+	}()
+}
+
 func (u *User) ViewModel() string {
 	return userTable
 }
 
+func (_ *User) AggregateTypes() []models.AggregateType {
+	return []models.AggregateType{es_model.UserAggregate, org_es_model.OrgAggregate}
+}
+
+func (u *User) CurrentSequence(event *models.Event) (uint64, error) {
+	sequence, err := u.view.GetLatestUserSequence(string(event.AggregateType))
+	if err != nil {
+		return 0, err
+	}
+	return sequence.CurrentSequence, nil
+}
+
 func (u *User) EventQuery() (*models.SearchQuery, error) {
-	sequence, err := u.view.GetLatestUserSequence()
+	sequence, err := u.view.GetLatestUserSequence("")
 	if err != nil {
 		return nil, err
 	}
 	return es_models.NewSearchQuery().
-		AggregateTypeFilter(es_model.UserAggregate, org_es_model.OrgAggregate).
+		AggregateTypeFilter(u.AggregateTypes()...).
 		LatestSequenceFilter(sequence.CurrentSequence), nil
 }
 
@@ -120,14 +158,14 @@ func (u *User) ProcessUser(event *models.Event) (err error) {
 		}
 		err = u.fillLoginNames(user)
 	case es_model.UserRemoved:
-		return u.view.DeleteUser(event.AggregateID, event.Sequence, event.CreationDate)
+		return u.view.DeleteUser(event.AggregateID, event)
 	default:
-		return u.view.ProcessedUserSequence(event.Sequence, event.CreationDate)
+		return u.view.ProcessedUserSequence(event)
 	}
 	if err != nil {
 		return err
 	}
-	return u.view.PutUser(user, user.Sequence, event.CreationDate)
+	return u.view.PutUser(user, event)
 }
 
 func (u *User) fillLoginNames(user *view_model.UserView) (err error) {
@@ -158,7 +196,7 @@ func (u *User) ProcessOrg(event *models.Event) (err error) {
 	case org_es_model.OrgDomainPrimarySet:
 		return u.fillPreferredLoginNamesOnOrgUsers(event)
 	default:
-		return u.view.ProcessedUserSequence(event.Sequence, event.CreationDate)
+		return u.view.ProcessedUserSequence(event)
 	}
 }
 
@@ -181,7 +219,7 @@ func (u *User) fillLoginNamesOnOrgUsers(event *models.Event) error {
 	for _, user := range users {
 		user.SetLoginNames(policy, org.Domains)
 	}
-	return u.view.PutUsers(users, event.Sequence, event.CreationDate)
+	return u.view.PutUsers(users, event)
 }
 
 func (u *User) fillPreferredLoginNamesOnOrgUsers(event *models.Event) error {
@@ -206,7 +244,7 @@ func (u *User) fillPreferredLoginNamesOnOrgUsers(event *models.Event) error {
 	for _, user := range users {
 		user.PreferredLoginName = user.GenerateLoginName(org.GetPrimaryDomain().Domain, policy.UserLoginMustBeDomain)
 	}
-	return u.view.PutUsers(users, 0, event.CreationDate)
+	return u.view.PutUsers(users, event)
 }
 
 func (u *User) OnError(event *models.Event, err error) error {