add document state transformer interface

internal/data/document.go

@@ -32,7 +32,12 @@ type DocumentGetter interface {
 	GetDocument() Document
 }
 
+type DocumentStateTransformer interface {
+	Apply(overrideState string) error
+}
+
 type Document interface {
+	GetURI() string
 	Serializer
 	Loader
 	Validator
@@ -52,6 +57,7 @@ type Document interface {
 	HasConfig(string) bool
 	GetConfig(string) Block
 
+	Apply(state string) error
 	Len() int
 	ResolveIds(ctx context.Context)
 	Filter(filter DeclarationSelector) []Declaration
@@ -60,8 +66,11 @@ type Document interface {
 	CheckConstraints() bool
 	Failures() int
 
+	ImportedDocuments() []Document
+
 	ConfigFilter(filter BlockSelector) []Block
 	AppendConfigurations([]Document)
-	Diff(with Document, output io.Writer) (returnOutput string, diffErr error) 
+	Diff(with Document, output io.Writer) (returnOutput string, diffErr error)
+	DiffState(output io.Writer) (returnOutput string, diffErr error)
 	Clone() Document
 }

internal/data/resource.go

@@ -42,7 +42,7 @@ type Declaration interface {
 	ResolveId(context.Context) string
 	Loader
 	Validator
-	StateTransformer
+	DocumentStateTransformer
 	Resource() Resource
 	Clone() Declaration
 }