feat: message source

message/source.go

@@ -0,0 +1,33 @@
+package message
+
+type SourceType byte
+
+// MessageSourceType 常量
+const (
+	SourcePrivate      SourceType = 1 << iota
+	SourceGroup        SourceType = 1 << iota
+	SourceGuildChannel SourceType = 1 << iota
+	SourceGuildDirect  SourceType = 1 << iota
+)
+
+func (t SourceType) String() string {
+	switch t {
+	case SourcePrivate:
+		return "私聊"
+	case SourceGroup:
+		return "群聊"
+	case SourceGuildChannel:
+		return "频道"
+	case SourceGuildDirect:
+		return "频道私聊"
+	default:
+		return "unknown"
+	}
+}
+
+// Source 消息来源
+type Source struct {
+	SourceType  SourceType
+	PrimaryID   int64 // 群号/QQ号/guild_id
+	SecondaryID int64 // channel_id
+}