try splitt event

internal/eventstore/v2/event.go

@@ -2,18 +2,12 @@ package eventstore
 
 import (
 	"time"
-
-	"github.com/caos/zitadel/internal/eventstore/v2/repository"
 )
 
-//Event is the representation of a state change
-type Event interface {
-	//CheckPrevious ensures the event order if true
-	// if false the previous sequence is not checked on push
-	CheckPrevious() bool
-	//EditorService must return the name of the service which creates the new event
+type EventPusher interface {
+	// EditorService is the service who wants to push the event
 	EditorService() string
-	//EditorUser must return the id of the user who created the event
+	//EditorUser is the user who wants to push the event
 	EditorUser() string
 	//Type must return an event type which should be unique in the aggregate
 	Type() EventType
@@ -24,30 +18,30 @@ type Event interface {
 	// * struct which can be marshalled to json
 	// * pointer to struct which can be marshalled to json
 	Data() interface{}
-	//MetaData returns all data saved on a event
-	// It must not be set on push
-	// The event mapper function must set this struct
-	MetaData() *EventMetaData
+	//CheckPrevious ensures the event order if true
+	// if false the previous sequence is not checked on push
+	CheckPrevious() bool
 }
 
-func MetaDataFromRepo(event *repository.Event) *EventMetaData {
-	return &EventMetaData{
-		AggregateID:       event.AggregateID,
-		AggregateType:     AggregateType(event.AggregateType),
-		AggregateVersion:  Version(event.Version),
-		PreviouseSequence: event.PreviousSequence,
-		ResourceOwner:     event.ResourceOwner,
-		Sequence:          event.Sequence,
-		CreationDate:      event.CreationDate,
-	}
+type EventReader interface {
+	// EditorService is the service who pushed the event
+	EditorService() string
+	//EditorUser is the user who pushed the event
+	EditorUser() string
+	//Type is the type of the event
+	Type() EventType
+
+	AggregateID() string
+	AggregateType() AggregateType
+	ResourceOwner() string
+	AggregateVersion() Version
+	Sequence() uint64
+	PreviousSequence() uint64
+	CreationDate() time.Time
 }
 
-type EventMetaData struct {
-	AggregateID       string
-	AggregateType     AggregateType
-	ResourceOwner     string
-	AggregateVersion  Version
-	Sequence          uint64
-	PreviouseSequence uint64
-	CreationDate      time.Time
+//Event is the representation of a state change
+type Event interface {
+	EventPusher
+	EventReader
 }

internal/eventstore/v2/event_base.go

@@ -0,0 +1,78 @@
+package eventstore
+
+import (
+	"time"
+
+	"github.com/caos/zitadel/internal/eventstore/v2/repository"
+)
+
+type BaseEvent struct {
+	aggregateID   string        `json:"-"`
+	aggregateType AggregateType `json:"-"`
+	EventType     EventType     `json:"-"`
+
+	resourceOwner     string    `json:"-"`
+	aggregateVersion  Version   `json:"-"`
+	sequence          uint64    `json:"-"`
+	previouseSequence uint64    `json:"-"`
+	creationDate      time.Time `json:"-"`
+
+	//User is the user who created the event
+	User string `json:"-"`
+	//Service is the service which created the event
+	Service string `json:"-"`
+}
+
+// EditorService implements EventPusher
+func (e *BaseEvent) EditorService() string {
+	return e.Service
+}
+
+//EditorUser implements EventPusher
+func (e *BaseEvent) EditorUser() string {
+	return e.User
+}
+
+//Type implements EventPusher
+func (e *BaseEvent) Type() EventType {
+	return e.EventType
+}
+
+func (e *BaseEvent) AggregateID() string {
+	return e.aggregateID
+}
+func (e *BaseEvent) AggregateType() AggregateType {
+	return e.aggregateType
+}
+func (e *BaseEvent) ResourceOwner() string {
+	return e.resourceOwner
+}
+func (e *BaseEvent) AggregateVersion() Version {
+	return e.aggregateVersion
+}
+func (e *BaseEvent) Sequence() uint64 {
+	return e.sequence
+}
+func (e *BaseEvent) PreviousSequence() uint64 {
+	return e.previouseSequence
+}
+func (e *BaseEvent) CreationDate() time.Time {
+	return e.creationDate
+}
+
+func BaseEventFromRepo(event *repository.Event) *BaseEvent {
+	return &BaseEvent{
+		aggregateID:       event.AggregateID,
+		aggregateType:     AggregateType(event.AggregateType),
+		aggregateVersion:  Version(event.Version),
+		EventType:         EventType(event.Type),
+		creationDate:      event.CreationDate,
+		sequence:          event.Sequence,
+		previouseSequence: event.PreviousSequence,
+		resourceOwner:     event.ResourceOwner,
+		Service:           event.EditorService,
+		User:              event.EditorUser,
+	}
+}
+
+func NewBaseEvent()

internal/eventstore/v2/eventstore.go

@@ -42,7 +42,7 @@ type aggregater interface {
 	//Type returns the aggregate type
 	Type() AggregateType
 	//Events returns the events which will be pushed
-	Events() []Event
+	Events() []EventPusher
 	//ResourceOwner returns the organisation id which manages this aggregate
 	// resource owner is only on the inital push needed
 	// afterwards the resource owner of the previous event is taken
@@ -58,7 +58,7 @@ type aggregater interface {
 
 //PushAggregates maps the events of all aggregates to an eventstore event
 // based on the pushMapper
-func (es *Eventstore) PushAggregates(ctx context.Context, aggregates ...aggregater) ([]Event, error) {
+func (es *Eventstore) PushAggregates(ctx context.Context, aggregates ...aggregater) ([]EventReader, error) {
 	events, err := es.aggregatesToEvents(aggregates)
 	if err != nil {
 		return nil, err
@@ -102,7 +102,7 @@ func (es *Eventstore) aggregatesToEvents(aggregates []aggregater) ([]*repository
 
 //FilterEvents filters the stored events based on the searchQuery
 // and maps the events to the defined event structs
-func (es *Eventstore) FilterEvents(ctx context.Context, queryFactory *SearchQueryFactory) ([]Event, error) {
+func (es *Eventstore) FilterEvents(ctx context.Context, queryFactory *SearchQueryFactory) ([]EventReader, error) {
 	query, err := queryFactory.build()
 	if err != nil {
 		return nil, err
@@ -115,8 +115,8 @@ func (es *Eventstore) FilterEvents(ctx context.Context, queryFactory *SearchQuer
 	return es.mapEvents(events)
 }
 
-func (es *Eventstore) mapEvents(events []*repository.Event) (mappedEvents []Event, err error) {
-	mappedEvents = make([]Event, len(events))
+func (es *Eventstore) mapEvents(events []*repository.Event) (mappedEvents []EventReader, err error) {
+	mappedEvents = make([]EventReader, len(events))
 
 	es.interceptorMutex.Lock()
 	defer es.interceptorMutex.Unlock()
@@ -140,7 +140,7 @@ type reducer interface {
 	// it only appends the newly added events
 	Reduce() error
 	//AppendEvents appends the passed events to an internal list of events
-	AppendEvents(...Event) error
+	AppendEvents(...EventReader) error
 }
 
 //FilterToReducer filters the events based on the search query, appends all events to the reducer and calls it's reduce function
@@ -180,7 +180,7 @@ func (es *Eventstore) RegisterFilterEventMapper(eventType EventType, mapper func
 	return es
 }
 
-func eventData(event Event) ([]byte, error) {
+func eventData(event EventPusher) ([]byte, error) {
 	switch data := event.Data().(type) {
 	case nil:
 		return nil, nil

internal/eventstore/v2/eventstore_test.go

@@ -13,7 +13,7 @@ import (
 
 type testAggregate struct {
 	id               string
-	events           []Event
+	events           []EventPusher
 	previousSequence uint64
 }
 
@@ -25,7 +25,7 @@ func (a *testAggregate) Type() AggregateType {
 	return "test.aggregate"
 }
 
-func (a *testAggregate) Events() []Event {
+func (a *testAggregate) Events() []EventPusher {
 	return a.events
 }
 
@@ -43,38 +43,39 @@ func (a *testAggregate) PreviousSequence() uint64 {
 
 // testEvent implements the Event interface
 type testEvent struct {
+	BaseEvent
+
 	description         string
 	shouldCheckPrevious bool
 	data                func() interface{}
 }
 
+func newTestEvent(description string, data func() interface{}, checkPrevious bool) *testEvent {
+	return &testEvent{
+		description:         description,
+		data:                data,
+		shouldCheckPrevious: checkPrevious,
+		BaseEvent: BaseEvent{
+			User:      "editorUser",
+			Service:   "editorService",
+			EventType: "test.event",
+		},
+	}
+}
+
 func (e *testEvent) CheckPrevious() bool {
 	return e.shouldCheckPrevious
 }
 
-func (e *testEvent) EditorService() string {
-	return "editorService"
-}
-func (e *testEvent) EditorUser() string {
-	return "editorUser"
-}
-func (e *testEvent) Type() EventType {
-	return "test.event"
-}
 func (e *testEvent) Data() interface{} {
 	return e.data()
 }
 
-func (e *testEvent) PreviousSequence() uint64 {
-	return 0
-}
-
-func (e *testEvent) MetaData() *EventMetaData {
-	return nil
-}
-
-func testFilterMapper(*repository.Event) (Event, error) {
-	return &testEvent{description: "hodor"}, nil
+func testFilterMapper(event *repository.Event) (Event, error) {
+	if event == nil {
+		return newTestEvent("hodor", nil, false), nil
+	}
+	return &testEvent{description: "hodor", BaseEvent: *BaseEventFromRepo(event)}, nil
 }
 
 func Test_eventstore_RegisterFilterEventMapper(t *testing.T) {
@@ -132,7 +133,7 @@ func Test_eventstore_RegisterFilterEventMapper(t *testing.T) {
 				mapper:    testFilterMapper,
 			},
 			res: res{
-				event:       &testEvent{description: "hodor"},
+				event:       newTestEvent("hodor", nil, false),
 				mapperCount: 1,
 			},
 		},
@@ -148,7 +149,7 @@ func Test_eventstore_RegisterFilterEventMapper(t *testing.T) {
 				mapper:    testFilterMapper,
 			},
 			res: res{
-				event:       &testEvent{description: "hodor"},
+				event:       newTestEvent("hodor", nil, false),
 				mapperCount: 2,
 			},
 		},
@@ -168,7 +169,7 @@ func Test_eventstore_RegisterFilterEventMapper(t *testing.T) {
 				mapper:    testFilterMapper,
 			},
 			res: res{
-				event:       &testEvent{description: "hodor"},
+				event:       newTestEvent("hodor", nil, false),
 				mapperCount: 2,
 			},
 		},
@@ -195,7 +196,7 @@ func Test_eventstore_RegisterFilterEventMapper(t *testing.T) {
 			}
 
 			if !reflect.DeepEqual(tt.res.event, event) {
-				t.Errorf("events should be deep equal. \ngot %v\nwant %v", event, tt.res.event)
+				t.Errorf("events should be deep equal. \ngot %#v\nwant %#v", event, tt.res.event)
 			}
 		})
 	}
@@ -203,7 +204,7 @@ func Test_eventstore_RegisterFilterEventMapper(t *testing.T) {
 
 func Test_eventData(t *testing.T) {
 	type args struct {
-		event Event
+		event EventPusher
 	}
 	type res struct {
 		jsonText []byte
@@ -217,11 +218,12 @@ func Test_eventData(t *testing.T) {
 		{
 			name: "data as json bytes",
 			args: args{
-				event: &testEvent{
-					data: func() interface{} {
+				event: newTestEvent(
+					"hodor",
+					func() interface{} {
 						return []byte(`{"piff":"paff"}`)
 					},
-				},
+					false),
 			},
 			res: res{
 				jsonText: []byte(`{"piff":"paff"}`),
@@ -231,11 +233,12 @@ func Test_eventData(t *testing.T) {
 		{
 			name: "data as invalid json bytes",
 			args: args{
-				event: &testEvent{
-					data: func() interface{} {
+				event: newTestEvent(
+					"hodor",
+					func() interface{} {
 						return []byte(`{"piffpaff"}`)
 					},
-				},
+					false),
 			},
 			res: res{
 				jsonText: []byte(nil),
@@ -245,13 +248,14 @@ func Test_eventData(t *testing.T) {
 		{
 			name: "data as struct",
 			args: args{
-				event: &testEvent{
-					data: func() interface{} {
+				event: newTestEvent(
+					"hodor",
+					func() interface{} {
 						return struct {
 							Piff string `json:"piff"`
 						}{Piff: "paff"}
 					},
-				},
+					false),
 			},
 			res: res{
 				jsonText: []byte(`{"piff":"paff"}`),
@@ -261,13 +265,14 @@ func Test_eventData(t *testing.T) {
 		{
 			name: "data as ptr to struct",
 			args: args{
-				event: &testEvent{
-					data: func() interface{} {
+				event: newTestEvent(
+					"hodor",
+					func() interface{} {
 						return &struct {
 							Piff string `json:"piff"`
 						}{Piff: "paff"}
 					},
-				},
+					false),
 			},
 			res: res{
 				jsonText: []byte(`{"piff":"paff"}`),
@@ -277,11 +282,12 @@ func Test_eventData(t *testing.T) {
 		{
 			name: "no data",
 			args: args{
-				event: &testEvent{
-					data: func() interface{} {
+				event: newTestEvent(
+					"hodor",
+					func() interface{} {
 						return nil
 					},
-				},
+					false),
 			},
 			res: res{
 				jsonText: []byte(nil),
@@ -291,11 +297,12 @@ func Test_eventData(t *testing.T) {
 		{
 			name: "invalid because primitive",
 			args: args{
-				event: &testEvent{
-					data: func() interface{} {
+				event: newTestEvent(
+					"hodor",
+					func() interface{} {
 						return ""
 					},
-				},
+					false),
 			},
 			res: res{
 				jsonText: []byte(nil),
@@ -305,12 +312,13 @@ func Test_eventData(t *testing.T) {
 		{
 			name: "invalid because pointer to primitive",
 			args: args{
-				event: &testEvent{
-					data: func() interface{} {
+				event: newTestEvent(
+					"hodor",
+					func() interface{} {
 						var s string
 						return &s
 					},
-				},
+					false),
 			},
 			res: res{
 				jsonText: []byte(nil),
@@ -320,13 +328,14 @@ func Test_eventData(t *testing.T) {
 		{
 			name: "invalid because invalid struct for json",
 			args: args{
-				event: &testEvent{
-					data: func() interface{} {
+				event: newTestEvent(
+					"hodor",
+					func() interface{} {
 						return struct {
 							Field chan string `json:"field"`
 						}{}
 					},
-				},
+					false),
 			},
 			res: res{
 				jsonText: []byte(nil),
@@ -367,11 +376,13 @@ func TestEventstore_aggregatesToEvents(t *testing.T) {
 				aggregates: []aggregater{
 					&testAggregate{
 						id: "1",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
 						},
 					},
 				},
@@ -399,15 +410,19 @@ func TestEventstore_aggregatesToEvents(t *testing.T) {
 				aggregates: []aggregater{
 					&testAggregate{
 						id: "1",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
 						},
 					},
 				},
@@ -446,11 +461,13 @@ func TestEventstore_aggregatesToEvents(t *testing.T) {
 				aggregates: []aggregater{
 					&testAggregate{
 						id: "1",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return `{"data":""` },
-								shouldCheckPrevious: false,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return `{"data":""`
+								},
+								false),
 						},
 					},
 				},
@@ -465,24 +482,30 @@ func TestEventstore_aggregatesToEvents(t *testing.T) {
 				aggregates: []aggregater{
 					&testAggregate{
 						id: "1",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
 						},
 					},
 					&testAggregate{
 						id: "2",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: true,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								true),
 						},
 					},
 				},
@@ -621,11 +644,13 @@ func TestEventstore_Push(t *testing.T) {
 				aggregates: []aggregater{
 					&testAggregate{
 						id: "1",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
 						},
 					},
 				},
@@ -660,15 +685,19 @@ func TestEventstore_Push(t *testing.T) {
 				aggregates: []aggregater{
 					&testAggregate{
 						id: "1",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
 						},
 					},
 				},
@@ -717,24 +746,30 @@ func TestEventstore_Push(t *testing.T) {
 				aggregates: []aggregater{
 					&testAggregate{
 						id: "1",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
 						},
 					},
 					&testAggregate{
 						id: "2",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: true,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								true),
 						},
 					},
 				},
@@ -798,11 +833,13 @@ func TestEventstore_Push(t *testing.T) {
 				aggregates: []aggregater{
 					&testAggregate{
 						id: "1",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return nil },
-								shouldCheckPrevious: false,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return nil
+								},
+								false),
 						},
 					},
 				},
@@ -823,11 +860,13 @@ func TestEventstore_Push(t *testing.T) {
 				aggregates: []aggregater{
 					&testAggregate{
 						id: "1",
-						events: []Event{
-							&testEvent{
-								data:                func() interface{} { return `{"data":""` },
-								shouldCheckPrevious: false,
-							},
+						events: []EventPusher{
+							newTestEvent(
+								"",
+								func() interface{} {
+									return `{"data":""`
+								},
+								false),
 						},
 					},
 				},

internal/eventstore/v2/example_test.go

@@ -18,6 +18,8 @@ import (
 // ------------------------------------------------------------
 
 type UserAggregate struct {
+	eventstore.BaseEvent
+
 	eventstore.Aggregate
 	FirstName string
 }
@@ -28,8 +30,13 @@ func (a *UserAggregate) ID() string {
 func (a *UserAggregate) Type() eventstore.AggregateType {
 	return "test.user"
 }
-func (a *UserAggregate) Events() []eventstore.Event {
-	return a.Aggregate.Events
+func (a *UserAggregate) Events() []eventstore.EventPusher {
+	events := make([]eventstore.EventPusher, len(a.Aggregate.Events))
+	for i, event := range a.Aggregate.Events {
+		events[i] = event
+	}
+
+	return events
 }
 func (a *UserAggregate) ResourceOwner() string {
 	return "caos"
@@ -69,14 +76,26 @@ func (rm *UserAggregate) Reduce() error {
 // ------------------------------------------------------------
 
 type UserAddedEvent struct {
+	eventstore.BaseEvent `json:"-"`
+
 	FirstName string `json:"firstName"`
-	metaData  *eventstore.EventMetaData
+}
+
+func NewUserAddedEvent(firstName string) *UserAddedEvent {
+	return &UserAddedEvent{
+		FirstName: firstName,
+		BaseEvent: eventstore.BaseEvent{
+			Service:   "test.suite",
+			User:      "adlerhurst",
+			EventType: "user.added",
+		},
+	}
 }
 
 func UserAddedEventMapper() (eventstore.EventType, func(*repository.Event) (eventstore.Event, error)) {
 	return "user.added", func(event *repository.Event) (eventstore.Event, error) {
 		e := &UserAddedEvent{
-			metaData: eventstore.MetaDataFromRepo(event),
+			BaseEvent: *eventstore.BaseEventFromRepo(event),
 		}
 		err := json.Unmarshal(event.Data, e)
 		if err != nil {
@@ -90,39 +109,35 @@ func (e *UserAddedEvent) CheckPrevious() bool {
 	return true
 }
 
-func (e *UserAddedEvent) EditorService() string {
-	return "test.suite"
-}
-
-func (e *UserAddedEvent) EditorUser() string {
-	return "adlerhurst"
-}
-
-func (e *UserAddedEvent) Type() eventstore.EventType {
-	return "user.added"
-}
-
 func (e *UserAddedEvent) Data() interface{} {
 	return e
 }
 
-func (e *UserAddedEvent) MetaData() *eventstore.EventMetaData {
-	return e.metaData
-}
-
 // ------------------------------------------------------------
 // User first name changed event start
 // ------------------------------------------------------------
 
 type UserFirstNameChangedEvent struct {
-	FirstName string                    `json:"firstName"`
-	metaData  *eventstore.EventMetaData `json:"-"`
+	eventstore.BaseEvent `json:"-"`
+
+	FirstName string `json:"firstName"`
+}
+
+func NewUserFirstNameChangedEvent(firstName string) *UserFirstNameChangedEvent {
+	return &UserFirstNameChangedEvent{
+		FirstName: firstName,
+		BaseEvent: eventstore.BaseEvent{
+			Service:   "test.suite",
+			User:      "adlerhurst",
+			EventType: "user.firstName.changed",
+		},
+	}
 }
 
 func UserFirstNameChangedMapper() (eventstore.EventType, func(*repository.Event) (eventstore.Event, error)) {
 	return "user.firstName.changed", func(event *repository.Event) (eventstore.Event, error) {
 		e := &UserFirstNameChangedEvent{
-			metaData: eventstore.MetaDataFromRepo(event),
+			BaseEvent: *eventstore.BaseEventFromRepo(event),
 		}
 		err := json.Unmarshal(event.Data, e)
 		if err != nil {
@@ -136,38 +151,32 @@ func (e *UserFirstNameChangedEvent) CheckPrevious() bool {
 	return true
 }
 
-func (e *UserFirstNameChangedEvent) EditorService() string {
-	return "test.suite"
-}
-
-func (e *UserFirstNameChangedEvent) EditorUser() string {
-	return "adlerhurst"
-}
-
-func (e *UserFirstNameChangedEvent) Type() eventstore.EventType {
-	return "user.firstName.changed"
-}
-
 func (e *UserFirstNameChangedEvent) Data() interface{} {
 	return e
 }
 
-func (e *UserFirstNameChangedEvent) MetaData() *eventstore.EventMetaData {
-	return e.metaData
-}
-
 // ------------------------------------------------------------
 // User password checked event start
 // ------------------------------------------------------------
 
 type UserPasswordCheckedEvent struct {
-	metaData *eventstore.EventMetaData `json:"-"`
+	eventstore.BaseEvent `json:"-"`
+}
+
+func NewUserPasswordCheckedEvent() *UserPasswordCheckedEvent {
+	return &UserPasswordCheckedEvent{
+		BaseEvent: eventstore.BaseEvent{
+			Service:   "test.suite",
+			User:      "adlerhurst",
+			EventType: "user.password.checked",
+		},
+	}
 }
 
 func UserPasswordCheckedMapper() (eventstore.EventType, func(*repository.Event) (eventstore.Event, error)) {
 	return "user.password.checked", func(event *repository.Event) (eventstore.Event, error) {
 		return &UserPasswordCheckedEvent{
-			metaData: eventstore.MetaDataFromRepo(event),
+			BaseEvent: *eventstore.BaseEventFromRepo(event),
 		}, nil
 	}
 }
@@ -176,38 +185,32 @@ func (e *UserPasswordCheckedEvent) CheckPrevious() bool {
 	return false
 }
 
-func (e *UserPasswordCheckedEvent) EditorService() string {
-	return "test.suite"
-}
-
-func (e *UserPasswordCheckedEvent) EditorUser() string {
-	return "adlerhurst"
-}
-
-func (e *UserPasswordCheckedEvent) Type() eventstore.EventType {
-	return "user.password.checked"
-}
-
 func (e *UserPasswordCheckedEvent) Data() interface{} {
 	return nil
 }
 
-func (e *UserPasswordCheckedEvent) MetaData() *eventstore.EventMetaData {
-	return e.metaData
-}
-
 // ------------------------------------------------------------
 // User deleted event
 // ------------------------------------------------------------
 
 type UserDeletedEvent struct {
-	metaData *eventstore.EventMetaData `json:"-"`
+	eventstore.BaseEvent `json:"-"`
+}
+
+func NewUserDeletedEvent() *UserDeletedEvent {
+	return &UserDeletedEvent{
+		BaseEvent: eventstore.BaseEvent{
+			Service:   "test.suite",
+			User:      "adlerhurst",
+			EventType: "user.deleted",
+		},
+	}
 }
 
 func UserDeletedMapper() (eventstore.EventType, func(*repository.Event) (eventstore.Event, error)) {
 	return "user.deleted", func(event *repository.Event) (eventstore.Event, error) {
 		return &UserDeletedEvent{
-			metaData: eventstore.MetaDataFromRepo(event),
+			BaseEvent: *eventstore.BaseEventFromRepo(event),
 		}, nil
 	}
 }
@@ -216,26 +219,10 @@ func (e *UserDeletedEvent) CheckPrevious() bool {
 	return false
 }
 
-func (e *UserDeletedEvent) EditorService() string {
-	return "test.suite"
-}
-
-func (e *UserDeletedEvent) EditorUser() string {
-	return "adlerhurst"
-}
-
-func (e *UserDeletedEvent) Type() eventstore.EventType {
-	return "user.deleted"
-}
-
 func (e *UserDeletedEvent) Data() interface{} {
 	return nil
 }
 
-func (e *UserDeletedEvent) MetaData() *eventstore.EventMetaData {
-	return e.metaData
-}
-
 // ------------------------------------------------------------
 // Users read model start
 // ------------------------------------------------------------
@@ -258,18 +245,18 @@ func (rm *UsersReadModel) AppendEvents(events ...eventstore.Event) (err error) {
 		switch e := event.(type) {
 		case *UserAddedEvent:
 			//insert
-			user := NewUserReadModel(e.MetaData().AggregateID)
+			user := NewUserReadModel(e.Base().AggregateID)
 			rm.Users = append(rm.Users, user)
 			err = user.AppendEvents(e)
 		case *UserFirstNameChangedEvent, *UserPasswordCheckedEvent:
 			//update
-			_, user := rm.userByID(e.MetaData().AggregateID)
+			_, user := rm.userByID(e.Base().aggregateID)
 			if user == nil {
 				return errors.New("user not found")
 			}
 			err = user.AppendEvents(e)
 		case *UserDeletedEvent:
-			idx, _ := rm.userByID(e.metaData.AggregateID)
+			idx, _ := rm.userByID(e.Base().AggregateID)
 			if idx < 0 {
 				return nil
 			}
@@ -337,7 +324,7 @@ func (rm *UserReadModel) Reduce() error {
 			rm.FirstName = e.FirstName
 		case *UserPasswordCheckedEvent:
 			rm.pwCheckCount++
-			rm.lastPasswordCheck = e.metaData.CreationDate
+			rm.lastPasswordCheck = e.Base().CreationDate
 		}
 	}
 	rm.ReadModel.Reduce()
@@ -356,9 +343,9 @@ func TestUserReadModel(t *testing.T) {
 		RegisterFilterEventMapper(UserDeletedMapper())
 
 	events, err := es.PushAggregates(context.Background(),
-		NewUserAggregate("1").AppendEvents(&UserAddedEvent{FirstName: "hodor"}),
-		NewUserAggregate("2").AppendEvents(&UserAddedEvent{FirstName: "hodor"}, &UserPasswordCheckedEvent{}, &UserPasswordCheckedEvent{}, &UserFirstNameChangedEvent{FirstName: "ueli"}),
-		NewUserAggregate("2").AppendEvents(&UserDeletedEvent{}),
+		NewUserAggregate("1").AppendEvents(NewUserAddedEvent("hodor")),
+		NewUserAggregate("2").AppendEvents(NewUserAddedEvent("hodor"), NewUserPasswordCheckedEvent(), NewUserPasswordCheckedEvent(), NewUserFirstNameChangedEvent("ueli")),
+		NewUserAggregate("2").AppendEvents(NewUserDeletedEvent()),
 	)
 	if err != nil {
 		t.Errorf("unexpected error on push aggregates: %v", err)

internal/eventstore/v2/read_model.go

@@ -33,10 +33,10 @@ func (rm *ReadModel) Reduce() error {
 	}
 
 	if rm.CreationDate.IsZero() {
-		rm.CreationDate = rm.Events[0].MetaData().CreationDate
+		rm.CreationDate = rm.Events[0].Base().creationDate
 	}
-	rm.ChangeDate = rm.Events[len(rm.Events)-1].MetaData().CreationDate
-	rm.ProcessedSequence = rm.Events[len(rm.Events)-1].MetaData().Sequence
+	rm.ChangeDate = rm.Events[len(rm.Events)-1].Base().creationDate
+	rm.ProcessedSequence = rm.Events[len(rm.Events)-1].Base().sequence
 	// all events processed and not needed anymore
 	rm.Events = nil
 	rm.Events = []Event{}
@@ -69,7 +69,7 @@ func (a *Aggregate) Reduce() error {
 		return nil
 	}
 
-	a.PreviousSequence = a.Events[len(a.Events)-1].MetaData().Sequence
+	a.PreviousSequence = a.Events[len(a.Events)-1].Base().sequence
 	// all events processed and not needed anymore
 	a.Events = nil
 	a.Events = []Event{}

internal/v2/repository/iam/aggregate.go

@@ -0,0 +1,36 @@
+package iam
+
+import "github.com/caos/zitadel/internal/eventstore/v2"
+
+type Aggregate struct {
+	eventstore.Aggregate
+}
+
+type Step int8
+
+type SetupStepEvent struct {
+	eventstore.BaseEvent `json:"-"`
+
+	Step Step
+	//Done if the setup is started earlier
+	Done bool `json:"-"`
+}
+
+func (e *SetupStepEvent) CheckPrevious() bool {
+	return e.Type() == "iam.setup.started"
+}
+
+//Type implements event
+func (e *SetupStepEvent) Type() eventstore.EventType {
+	if e.Done {
+		return "iam.setup.done"
+	}
+	return "iam.setup.started"
+}
+
+func (e *SetupStepEvent) Data() interface{} {
+	return e
+}
+
+type MemberAddedEvent struct {
+}

internal/v2/repository/member/event_added.go

@@ -0,0 +1,30 @@
+package member
+
+import (
+	"context"
+
+	"github.com/caos/zitadel/internal/eventstore/v2"
+)
+
+func NewMemberAddedEvent(ctx context.Context, userID string, roles ...string) *MemberAddedEvent {
+	return &MemberAddedEvent{
+		BaseEvent: eventstore.BaseEvent{},
+		Roles:     roles,
+		UserID:    userID,
+	}
+}
+
+type MemberAddedEvent struct {
+	eventstore.BaseEvent `json:"-"`
+
+	Roles  []string `json:"roles"`
+	UserID string   `json:"userId"`
+}
+
+func (e *MemberAddedEvent) CheckPrevious() bool {
+	return true
+}
+
+func (e *MemberAddedEvent) Data() interface{} {
+	return e
+}

internal/v2/repository/member/event_removed.go

@@ -0,0 +1,19 @@
+package member
+
+import (
+	"github.com/caos/zitadel/internal/eventstore/v2"
+)
+
+type MemberRemovedEvent struct {
+	eventstore.BaseEvent `json:"-"`
+
+	UserID string `json:"userId"`
+}
+
+func (e *MemberRemovedEvent) CheckPrevious() bool {
+	return true
+}
+
+func (e *MemberRemovedEvent) Data() interface{} {
+	return e
+}