Add 1.21.1 chat support (#284)

Merge this without verification. Otherwise can't be reviewed in the further updates.

Author: Tnze

chat/decoration.go

@@ -29,7 +29,7 @@ type Type struct {
 }
 
 func (t *Type) Decorate(content Message, d *Decoration) (msg Message) {
-	with := make([]Message, len(d.Parameters))
+	with := make([]any, len(d.Parameters))
 	for i, para := range d.Parameters {
 		switch para {
 		case "sender":

chat/jsonmessage.go

@@ -58,3 +58,16 @@ func (m *Message) UnmarshalJSON(raw []byte) (err error) {
 		return errors.New("unknown chat message type: '" + string(raw[0]) + "'")
 	}
 }
+
+func (t *TranslateArgs) UnmarshalJSON(raw []byte) error {
+	var v []Message
+	err := json.Unmarshal(raw, &v)
+	if err != nil {
+		return err
+	}
+
+	for _, v := range v {
+		*t = append(*t, v)
+	}
+	return nil
+}

chat/message.go

@@ -70,11 +70,13 @@ type Message struct {
 	ClickEvent *ClickEvent `json:"clickEvent,omitempty" nbt:"clickEvent,omitempty"`
 	HoverEvent *HoverEvent `json:"hoverEvent,omitempty" nbt:"hoverEvent,omitempty"`
 
-	Translate string    `json:"translate,omitempty" nbt:"translate,omitempty"`
-	With      []Message `json:"with,omitempty" nbt:"with,omitempty"`
-	Extra     []Message `json:"extra,omitempty" nbt:"extra,omitempty"`
+	Translate string        `json:"translate,omitempty" nbt:"translate,omitempty"`
+	With      TranslateArgs `json:"with,omitempty" nbt:"with,omitempty"`
+	Extra     []Message     `json:"extra,omitempty" nbt:"extra,omitempty"`
 }
 
+type TranslateArgs []any
+
 // Same as Message, but "Text" is omitempty
 type translateMsg struct {
 	Text string `json:"text,omitempty" nbt:"text,omitempty"`
@@ -92,9 +94,9 @@ type translateMsg struct {
 	ClickEvent *ClickEvent `json:"clickEvent,omitempty" nbt:"clickEvent,omitempty"`
 	HoverEvent *HoverEvent `json:"hoverEvent,omitempty" nbt:"hoverEvent,omitempty"`
 
-	Translate string    `json:"translate,omitempty" nbt:"translate,omitempty"`
-	With      []Message `json:"with,omitempty" nbt:"with,omitempty"`
-	Extra     []Message `json:"extra,omitempty" nbt:"extra,omitempty"`
+	Translate string        `json:"translate,omitempty" nbt:"translate,omitempty"`
+	With      TranslateArgs `json:"with,omitempty" nbt:"with,omitempty"`
+	Extra     []Message     `json:"extra,omitempty" nbt:"extra,omitempty"`
 }
 
 type rawMsgStruct Message
@@ -127,7 +129,9 @@ func Text(str string) Message {
 
 func TranslateMsg(key string, with ...Message) (m Message) {
 	m.Translate = key
-	m.With = with
+	for _, v := range with {
+		m.With = append(m.With, v)
+	}
 	return
 }
 
@@ -195,7 +199,12 @@ func (m Message) ClearString() string {
 	if m.Translate != "" {
 		args := make([]any, len(m.With))
 		for i, v := range m.With {
-			args[i] = v.ClearString()
+			switch v := v.(type) {
+			case Message:
+				args[i] = v.ClearString()
+			default:
+				args[i] = v
+			}
 		}
 
 		_, _ = fmt.Fprintf(&msg, translateMap[m.Translate], args...)
@@ -238,12 +247,7 @@ func (m Message) String() string {
 
 	// handle translate
 	if m.Translate != "" {
-		args := make([]any, len(m.With))
-		for i, v := range m.With {
-			args[i] = v
-		}
-
-		_, _ = fmt.Fprintf(&msg, translateMap[m.Translate], args...)
+		_, _ = fmt.Fprintf(&msg, translateMap[m.Translate], m.With...)
 	}
 
 	if m.Extra != nil {

chat/nbtmessage.go

@@ -52,3 +52,50 @@ func (m *Message) UnmarshalNBT(tagType byte, r nbt.DecoderReader) error {
 		return errors.New("unknown chat message type: '" + strconv.FormatUint(uint64(tagType), 16) + "'")
 	}
 }
+
+func (t *TranslateArgs) UnmarshalNBT(tagType byte, r nbt.DecoderReader) error {
+	tagReader := bytes.NewReader([]byte{tagType})
+	decoder := nbt.NewDecoder(io.MultiReader(tagReader, r))
+	decoder.NetworkFormat(true) // TagType directlly followed the body
+
+	switch tagType {
+	case nbt.TagList:
+		var value []Message
+		if _, err := decoder.Decode(&value); err != nil {
+			return err
+		}
+		for _, v := range value {
+			*t = append(*t, v)
+		}
+		return nil
+	case nbt.TagByteArray:
+		var value []int8
+		if _, err := decoder.Decode(&value); err != nil {
+			return err
+		}
+		for _, v := range value {
+			*t = append(*t, strconv.FormatInt(int64(v), 10))
+		}
+		return nil
+	case nbt.TagIntArray:
+		var value []int32
+		if _, err := decoder.Decode(&value); err != nil {
+			return err
+		}
+		for _, v := range value {
+			*t = append(*t, strconv.FormatInt(int64(v), 10))
+		}
+		return nil
+	case nbt.TagLongArray:
+		var value []int64
+		if _, err := decoder.Decode(&value); err != nil {
+			return err
+		}
+		for _, v := range value {
+			*t = append(*t, strconv.FormatInt(int64(v), 10))
+		}
+		return nil
+	default:
+		return errors.New("unknown translation args type: '" + strconv.FormatUint(uint64(tagType), 16) + "'")
+	}
+}

chat/nbtmessage_test.go

@@ -0,0 +1,36 @@
+package chat_test
+
+import (
+	"testing"
+
+	"github.com/Tnze/go-mc/chat"
+	en_us "github.com/Tnze/go-mc/data/lang/en-us"
+	"github.com/Tnze/go-mc/nbt"
+)
+
+func TestMessage_UnmarshalJSON_string(t *testing.T) {
+	snbts := []string{
+		"{translate: sleep.players_sleeping, with: [I; 1, 37]}",
+	}
+
+	texts := []string{
+		"1/37 players sleeping",
+	}
+
+	chat.SetLanguage(en_us.Map)
+	for i, v := range snbts {
+		bytes, err := nbt.Marshal(nbt.StringifiedMessage(v))
+		if err != nil {
+			t.Errorf("Invalid SNBT: %v", err)
+			continue
+		}
+
+		var cm chat.Message
+		if err := nbt.Unmarshal(bytes, &cm); err != nil {
+			t.Error(err)
+		}
+		if str := cm.String(); str != texts[i] {
+			t.Errorf("gets %q, wants %q", str, texts[i])
+		}
+	}
+}