major refactor based on README.md and TODOs

Updated types, improved units tests, isolated most test data to have
it in one place, renamed and created new files to improve readability,
and fixed a bunch of minor TODOs.

1 files changed, 71 insertions, 0 deletions

diff --git a/types/stitem.go b/types/stitem.go
index b214082..447cad0 100644
--- a/types/stitem.go
+++ b/types/stitem.go
@@ -119,3 +119,74 @@ func (i StItem) String() string {
 		return fmt.Sprintf("unknown StItem: %v", i.Format)
 	}
 }
+
+func NewSignedTreeHeadV1(th *TreeHeadV1, sig *SignatureV1) *StItem {
+	return &StItem{
+		Format: StFormatSignedTreeHeadV1,
+		SignedTreeHeadV1: &SignedTreeHeadV1{
+			TreeHead:  *th,
+			Signature: *sig,
+		},
+	}
+}
+
+func NewCosignedTreeHeadV1(sth *SignedTreeHeadV1, cosig []SignatureV1) *StItem {
+	if cosig == nil {
+		cosig = make([]SignatureV1, 0)
+	}
+	return &StItem{
+		Format: StFormatCosignedTreeHeadV1,
+		CosignedTreeHeadV1: &CosignedTreeHeadV1{
+			SignedTreeHead: *sth,
+			Cosignatures:   cosig,
+		},
+	}
+}
+
+func NewConsistencyProofV1(id *Namespace, size1, size2 uint64, path []NodeHash) *StItem {
+	return &StItem{
+		Format: StFormatConsistencyProofV1,
+		ConsistencyProofV1: &ConsistencyProofV1{
+			LogId:           *id,
+			TreeSize1:       size1,
+			TreeSize2:       size2,
+			ConsistencyPath: path,
+		},
+	}
+}
+
+func NewInclusionProofV1(id *Namespace, size, index uint64, path []NodeHash) *StItem {
+	return &StItem{
+		Format: StFormatInclusionProofV1,
+		InclusionProofV1: &InclusionProofV1{
+			LogId:         *id,
+			TreeSize:      size,
+			LeafIndex:     index,
+			InclusionPath: path,
+		},
+	}
+}
+
+func NewSignedChecksumV1(data *ChecksumV1, sig *SignatureV1) *StItem {
+	return &StItem{
+		Format: StFormatSignedChecksumV1,
+		SignedChecksumV1: &SignedChecksumV1{
+			Data:      *data,
+			Signature: *sig,
+		},
+	}
+}
+
+func NewTreeHeadV1(timestamp, size uint64, hash, extension []byte) *TreeHeadV1 {
+	if extension == nil {
+		extension = make([]byte, 0)
+	}
+	return &TreeHeadV1{
+		Timestamp: timestamp,
+		TreeSize:  size,
+		RootHash: NodeHash{
+			Data: hash,
+		},
+		Extension: extension,
+	}
+}