feat(project): 项目完结

internal/domain/shared/tree/router.go

@@ -0,0 +1,19 @@
+package tree
+
+import "context"
+
+type Handler[C any, D any, R any] interface {
+	Apply(ctx context.Context, command C, dynamic D) (R, error)
+}
+
+func Route[C any, D any, R any](ctx context.Context, next Handler[C, D, R], command C, dynamic D) (R, error) {
+	if next == nil {
+		return zero[R](), nil
+	}
+	return next.Apply(ctx, command, dynamic)
+}
+
+func zero[T any]() T {
+	var value T
+	return value
+}