snapshot of https://github.com/ory/keto.git (master, 2026-09-16; blobs > 131072B omitted)

internal/check/step/direct.go

@@ -0,0 +1,41 @@
+// Copyright © 2026 Ory Corp
+// SPDX-License-Identifier: Apache-2.0
+
+package step
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+
+	"github.com/ory/keto/internal/check"
+)
+
+// DirectStep checks whether the exact relation tuple exists in the database.
+type DirectStep struct{}
+
+func (DirectStep) Kind() check.StepKind { return check.StepDirect }
+
+func (DirectStep) Execute(ctx context.Context, req check.CheckRequest, ex check.Executor) check.Result {
+	if req.RestDepth <= 0 {
+		return maxDepthReached(ex, req)
+	}
+
+	ex.Deps().Logger().
+		WithField("request", req.Tuple.String()).
+		Trace("check direct")
+
+	found, err := ex.Deps().RelationTupleManager().ExistsRelationTuples(ctx, req.Tuple.ToQuery())
+	switch {
+	case err != nil:
+		ex.Deps().Logger().
+			WithField("method", "DirectStep").
+			WithError(err).
+			Error("failed to look up direct access in db")
+		return check.Result{Err: errors.WithStack(err)}
+	case found:
+		return check.ResultIsMember
+	default:
+		return check.ResultNotMember
+	}
+}