chore: move the go code into a subfolder

apps/api/internal/v2/readmodel/last_successful_mirror.go

@@ -0,0 +1,75 @@
+package readmodel
+
+import (
+	"github.com/shopspring/decimal"
+
+	"github.com/zitadel/zitadel/internal/v2/eventstore"
+	"github.com/zitadel/zitadel/internal/v2/system"
+	"github.com/zitadel/zitadel/internal/v2/system/mirror"
+)
+
+type LastSuccessfulMirror struct {
+	ID       string
+	Position decimal.Decimal
+	source   string
+}
+
+func NewLastSuccessfulMirror(source string) *LastSuccessfulMirror {
+	return &LastSuccessfulMirror{
+		source: source,
+	}
+}
+
+var _ eventstore.Reducer = (*LastSuccessfulMirror)(nil)
+
+func (p *LastSuccessfulMirror) Filter() *eventstore.Filter {
+	return eventstore.NewFilter(
+		eventstore.AppendAggregateFilter(
+			system.AggregateType,
+			eventstore.AggregateOwnersEqual(system.AggregateOwner),
+			eventstore.AppendEvent(
+				eventstore.SetEventTypes(
+					mirror.SucceededType,
+				),
+				eventstore.EventCreatorsEqual(mirror.Creator),
+			),
+		),
+		eventstore.FilterPagination(
+			eventstore.Descending(),
+			eventstore.Limit(1),
+		),
+	)
+}
+
+// Reduce implements eventstore.Reducer.
+func (h *LastSuccessfulMirror) Reduce(events ...*eventstore.StorageEvent) (err error) {
+	for _, event := range events {
+		if event.Type == mirror.SucceededType {
+			err = h.reduceSucceeded(event)
+		}
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (h *LastSuccessfulMirror) reduceSucceeded(event *eventstore.StorageEvent) error {
+	// if position is set we skip all older events
+	if h.Position.GreaterThan(decimal.NewFromInt(0)) {
+		return nil
+
+	}
+	succeededEvent, err := mirror.SucceededEventFromStorage(event)
+	if err != nil {
+		return err
+	}
+
+	if h.source != succeededEvent.Payload.Source {
+		return nil
+	}
+
+	h.Position = succeededEvent.Payload.Position
+
+	return nil
+}