Update languages file. Add two function to chat packet: Append and TranslateMsg

chat/chatMsg.go

@@ -38,6 +38,9 @@ type jsonChat struct {
 
 //UnmarshalJSON decode json to Message
 func (m *Message) UnmarshalJSON(jsonMsg []byte) (err error) {
+	if len(jsonMsg) == 0 {
+		return io.EOF
+	}
 	if jsonMsg[0] == '"' {
 		err = json.Unmarshal(jsonMsg, &m.Text) //Unmarshal as jsonString
 	} else {
@@ -65,6 +68,33 @@ func (m Message) Encode() []byte {
 	return pk.String(code).Encode()
 }
 
+func (m *Message) Append(extraMsg ...Message) {
+	origLen := len(m.Extra)
+	finalLen := origLen + len(extraMsg)
+	if cap(m.Extra) < len(m.Extra)+len(extraMsg) {
+		// pre expansion
+		extra := make([]jsonChat, finalLen)
+		copy(extra, m.Extra)
+		m.Extra = extra
+	}
+	for _, v := range extraMsg {
+		m.Extra = append(m.Extra, jsonChat(v))
+	}
+}
+
+func Text(str string) Message {
+	return Message{Text: str}
+}
+
+func TranslateMsg(key string, with ...Message) (m Message) {
+	m.Translate = key
+	m.With = make([]json.RawMessage, len(with))
+	for i, v := range with {
+		m.With[i], _ = json.Marshal(v)
+	}
+	return
+}
+
 var fmtCode = map[byte]string{
 	'0': "30",
 	'1': "34",

chat/chatMsg_test.go

@@ -2,6 +2,7 @@ package chat_test
 
 import (
 	"bytes"
+	"fmt"
 	"github.com/Tnze/go-mc/chat"
 	"testing"
 
@@ -107,3 +108,27 @@ func TestMessage_Encode(t *testing.T) {
 		t.Error("encode Message error: get", string(msg), ", want", wantMsg)
 	}
 }
+
+func ExampleMessage_Append() {
+	msg := chat.Message{Text: "1111"}
+	msg.Append(
+		chat.Message{Text: "22222"},
+		chat.Message{Text: "333333"},
+		chat.Message{Text: "4444444"},
+	)
+	fmt.Print(msg)
+	// Output: 1111222223333334444444
+}
+
+func ExampleTranslateMsg() {
+	fmt.Println(chat.TranslateMsg("translation.test.none"))
+	fmt.Println(chat.TranslateMsg(
+		"translation.test.complex",
+		chat.Text("1111"),
+		chat.Text("2222"),
+		chat.Text("3333"),
+	).String())
+	// Output:
+	// Hello, world!
+	// Prefix, 11112222 again 3333 and 1111 lastly 2222 and also 1111 again!
+}