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visitor.go
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/
visitor.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package allocations
import (
"google.golang.org/protobuf/proto"
"namespacelabs.dev/foundation/internal/codegen/protos/fnany"
"namespacelabs.dev/foundation/schema"
)
func Visit[V proto.Message](allocs []*schema.Allocation, owner schema.PackageName, tmpl V, f func(*schema.Allocation_Instance, *schema.Instantiate, V) error) error {
typeURL := fnany.TypeURL(owner, tmpl)
for _, alloc := range allocs {
for _, instance := range alloc.Instance {
for _, i := range instance.Instantiated {
if i.GetConstructor().GetTypeUrl() == typeURL {
copy := proto.Clone(tmpl)
if err := proto.Unmarshal(i.Constructor.GetValue(), copy); err != nil {
return err
}
if err := f(instance, i, copy.(V)); err != nil {
return err
}
}
}
if err := Visit(instance.DownstreamAllocation, owner, tmpl, f); err != nil {
return err
}
}
}
return nil
}