Command parse compound

server/command/serialize.go

@@ -0,0 +1,49 @@
+package command
+
+import (
+	"io"
+	"unsafe"
+
+	pk "github.com/Tnze/go-mc/net/packet"
+)
+
+const (
+	isExecutable = 1 << (iota + 2)
+	hasRedirect
+	hasSuggestionsType
+)
+
+func (g *Graph) WriteTo(w io.Writer) (int64, error) {
+	return pk.Tuple{
+		pk.Array(g.nodes),
+		pk.VarInt(0),
+	}.WriteTo(w)
+}
+
+func (n Node) WriteTo(w io.Writer) (int64, error) {
+	var flag byte
+	flag |= n.kind & 0x03
+	if n.Run != nil {
+		flag |= isExecutable
+	}
+	return pk.Tuple{
+		pk.Byte(flag),
+		pk.Array((*[]pk.VarInt)(unsafe.Pointer(&n.Children))),
+		pk.Opt{
+			Has:   func() bool { return n.kind&hasRedirect != 0 },
+			Field: nil, // TODO: send redirect node
+		},
+		pk.Opt{
+			Has:   func() bool { return n.kind == ArgumentNode || n.kind == LiteralNode },
+			Field: pk.String(n.Name),
+		},
+		pk.Opt{
+			Has:   func() bool { return n.kind == ArgumentNode },
+			Field: n.Parser, // Parser identifier and Properties
+		},
+		pk.Opt{
+			Has:   func() bool { return flag&hasSuggestionsType != 0 },
+			Field: nil, // TODO: send Suggestions type
+		},
+	}.WriteTo(w)
+}