add configuration support for /server packet

server/configuration.go

@@ -0,0 +1,39 @@
+package server
+
+import (
+	"github.com/Tnze/go-mc/chat"
+	"github.com/Tnze/go-mc/data/packetid"
+	"github.com/Tnze/go-mc/net"
+	pk "github.com/Tnze/go-mc/net/packet"
+	"github.com/Tnze/go-mc/registry"
+)
+
+type ConfigHandler interface {
+	AcceptConfig(conn *net.Conn) error
+}
+
+type Configurations struct {
+	Registries registry.NetworkCodec
+}
+
+func (c *Configurations) AcceptConfig(conn *net.Conn) error {
+	err := conn.WritePacket(pk.Marshal(
+		packetid.ClientboundConfigRegistryData,
+		pk.NBT(c.Registries),
+	))
+	if err != nil {
+		return err
+	}
+	err = conn.WritePacket(pk.Marshal(
+		packetid.ClientboundConfigFinishConfiguration,
+	))
+	return err
+}
+
+type ConfigFailErr struct {
+	reason chat.Message
+}
+
+func (c ConfigFailErr) Error() string {
+	return "config error: " + c.reason.ClearString()
+}