feat: add message

message.go

@@ -1,6 +1,8 @@
 package nano
 
 import (
+	"fmt"
+	"strconv"
 	"sync"
 	"time"
 
@@ -24,3 +26,104 @@ func GetTriggeredMessages(id string) []string {
 	defer triggeredMessagesMu.Unlock()
 	return triggeredMessages.Get(id)
 }
+
+type MessageType int
+
+const (
+	MessageTypeText MessageType = iota
+	MessageTypeImage
+	MessageTypeImageBytes
+	MessageTypeReply
+)
+
+// Message impl the array form of message
+type Messages []MessageSegment
+
+// MessageSegment impl the single message
+// MessageSegment 消息数组
+type MessageSegment struct {
+	Type MessageType
+	Data string
+}
+
+// String impls the interface fmt.Stringer
+func (m MessageSegment) String() string {
+	return m.Data
+}
+
+// Text 纯文本
+func Text(text ...interface{}) MessageSegment {
+	return MessageSegment{
+		Type: MessageTypeText,
+		Data: MessageEscape(fmt.Sprint(text...)),
+	}
+}
+
+// Face QQ表情
+// https://bot.q.qq.com/wiki/develop/api/openapi/message/message_format.html#%E6%94%AF%E6%8C%81%E7%9A%84%E6%A0%BC%E5%BC%8F
+func Face(id int) MessageSegment {
+	return MessageSegment{
+		Type: MessageTypeText,
+		Data: "<emoji:" + strconv.Itoa(id) + ">",
+	}
+}
+
+// Image 普通图片
+func Image(file string) MessageSegment {
+	return MessageSegment{
+		Type: MessageTypeImage,
+		Data: file,
+	}
+}
+
+// ImageBytes 普通图片
+func ImageBytes(data []byte) MessageSegment {
+	return MessageSegment{
+		Type: MessageTypeImageBytes,
+		Data: BytesToString(data),
+	}
+}
+
+// At @某人
+// https://bot.q.qq.com/wiki/develop/api/openapi/message/message_format.html#%E6%94%AF%E6%8C%81%E7%9A%84%E6%A0%BC%E5%BC%8F
+func At(id string) MessageSegment {
+	if id == "all" {
+		return AtAll()
+	}
+	return MessageSegment{
+		Type: MessageTypeText,
+		Data: "<@!" + id + ">",
+	}
+}
+
+// AtAll @全体成员
+// https://bot.q.qq.com/wiki/develop/api/openapi/message/message_format.html#%E6%94%AF%E6%8C%81%E7%9A%84%E6%A0%BC%E5%BC%8F
+func AtAll() MessageSegment {
+	return MessageSegment{
+		Type: MessageTypeText,
+		Data: "@everyone",
+	}
+}
+
+// AtChannel #频道
+// https://bot.q.qq.com/wiki/develop/api/openapi/message/message_format.html#%E6%94%AF%E6%8C%81%E7%9A%84%E6%A0%BC%E5%BC%8F
+func AtChannel(id string) MessageSegment {
+	return MessageSegment{
+		Type: MessageTypeText,
+		Data: "<#channel_id>",
+	}
+}
+
+// Reply 回复
+// https://github.com/botuniverse/onebot-11/tree/master/message/segment.md#%E5%9B%9E%E5%A4%8D
+func ReplyTo(id string) MessageSegment {
+	return MessageSegment{
+		Type: MessageTypeReply,
+		Data: id,
+	}
+}
+
+// ReplyWithMessage returns a reply message
+func ReplyWithMessage(messageID string, m ...MessageSegment) Messages {
+	return append(Messages{ReplyTo(messageID)}, m...)
+}