chore: move the go code into a subfolder

apps/api/internal/query/projection/milestones.go

@@ -0,0 +1,98 @@
+package projection
+
+import (
+	"context"
+
+	"github.com/zitadel/zitadel/internal/eventstore"
+	old_handler "github.com/zitadel/zitadel/internal/eventstore/handler"
+	"github.com/zitadel/zitadel/internal/eventstore/handler/v2"
+	"github.com/zitadel/zitadel/internal/repository/milestone"
+)
+
+const (
+	MilestonesProjectionTable = "projections.milestones3"
+
+	MilestoneColumnInstanceID  = "instance_id"
+	MilestoneColumnType        = "type"
+	MilestoneColumnReachedDate = "reached_date"
+	MilestoneColumnPushedDate  = "last_pushed_date"
+)
+
+type milestoneProjection struct{}
+
+func newMilestoneProjection(ctx context.Context, config handler.Config) *handler.Handler {
+	return handler.NewHandler(ctx, &config, &milestoneProjection{})
+}
+
+func (*milestoneProjection) Name() string {
+	return MilestonesProjectionTable
+}
+
+func (*milestoneProjection) Init() *old_handler.Check {
+	return handler.NewMultiTableCheck(
+		handler.NewTable([]*handler.InitColumn{
+			handler.NewColumn(MilestoneColumnInstanceID, handler.ColumnTypeText),
+			handler.NewColumn(MilestoneColumnType, handler.ColumnTypeEnum),
+			handler.NewColumn(MilestoneColumnReachedDate, handler.ColumnTypeTimestamp, handler.Nullable()),
+			handler.NewColumn(MilestoneColumnPushedDate, handler.ColumnTypeTimestamp, handler.Nullable()),
+		},
+			handler.NewPrimaryKey(MilestoneColumnInstanceID, MilestoneColumnType),
+		),
+	)
+}
+
+// Reducers implements handler.Projection.
+func (p *milestoneProjection) Reducers() []handler.AggregateReducer {
+	return []handler.AggregateReducer{
+		{
+			Aggregate: milestone.AggregateType,
+			EventReducers: []handler.EventReducer{
+				{
+					Event:  milestone.ReachedEventType,
+					Reduce: p.reduceReached,
+				},
+				{
+					Event:  milestone.PushedEventType,
+					Reduce: p.reducePushed,
+				},
+			},
+		},
+	}
+}
+
+func (p *milestoneProjection) reduceReached(event eventstore.Event) (*handler.Statement, error) {
+	e, err := assertEvent[*milestone.ReachedEvent](event)
+	if err != nil {
+		return nil, err
+	}
+	return handler.NewCreateStatement(event, []handler.Column{
+		handler.NewCol(MilestoneColumnInstanceID, e.Agg.InstanceID),
+		handler.NewCol(MilestoneColumnType, e.MilestoneType),
+		handler.NewCol(MilestoneColumnReachedDate, e.GetReachedDate()),
+	}), nil
+}
+
+func (p *milestoneProjection) reducePushed(event eventstore.Event) (*handler.Statement, error) {
+	e, err := assertEvent[*milestone.PushedEvent](event)
+	if err != nil {
+		return nil, err
+	}
+	if e.MilestoneType != milestone.InstanceDeleted {
+		return handler.NewUpdateStatement(
+			event,
+			[]handler.Column{
+				handler.NewCol(MilestoneColumnPushedDate, e.GetPushedDate()),
+			},
+			[]handler.Condition{
+				handler.NewCond(MilestoneColumnInstanceID, event.Aggregate().InstanceID),
+				handler.NewCond(MilestoneColumnType, e.MilestoneType),
+			},
+		), nil
+	}
+	return handler.NewDeleteStatement(
+		event,
+		[]handler.Condition{
+			handler.NewCond(MilestoneColumnInstanceID, event.Aggregate().InstanceID),
+		},
+	), nil
+}