1 files changed, 55 insertions, 0 deletions
diff --git a/object/tree/serialize.go b/object/tree/serialize.go
new file mode 100644
index 00000000..be31297b
--- /dev/null
+++ b/object/tree/serialize.go
@@ -0,0 +1,55 @@
+package tree
+
+import (
+	"errors"
+	"strconv"
+
+	objectheader "codeberg.org/lindenii/furgit/object/header"
+	objecttype "codeberg.org/lindenii/furgit/object/type"
+)
+
+// SerializeWithoutHeader renders the raw tree body bytes.
+func (tree *Tree) SerializeWithoutHeader() ([]byte, error) {
+	var bodyLen int
+
+	for _, entry := range tree.Entries {
+		mode := strconv.FormatUint(uint64(entry.Mode), 8)
+		bodyLen += len(mode) + 1 + len(entry.Name) + 1 + entry.ID.Size()
+	}
+
+	body := make([]byte, bodyLen)
+	pos := 0
+
+	for _, entry := range tree.Entries {
+		mode := strconv.FormatUint(uint64(entry.Mode), 8)
+		pos += copy(body[pos:], mode)
+		body[pos] = ' '
+		pos++
+		pos += copy(body[pos:], entry.Name)
+		body[pos] = 0
+		pos++
+		id := entry.ID.Bytes()
+		pos += copy(body[pos:], id)
+	}
+
+	return body, nil
+}
+
+// SerializeWithHeader renders the raw object (header + body).
+func (tree *Tree) SerializeWithHeader() ([]byte, error) {
+	body, err := tree.SerializeWithoutHeader()
+	if err != nil {
+		return nil, err
+	}
+
+	header, ok := objectheader.Encode(objecttype.TypeTree, int64(len(body)))
+	if !ok {
+		return nil, errors.New("object: tree: failed to encode object header")
+	}
+
+	raw := make([]byte, len(header)+len(body))
+	copy(raw, header)
+	copy(raw[len(header):], body)
+
+	return raw, nil
+}