add more

context.go

@@ -1,8 +1,22 @@
 package rei
 
+import tgba "github.com/go-telegram-bot-api/telegram-bot-api/v5"
+
 type Ctx struct {
 	Event
 	State
 	Caller *TelegramClient
 	ma     *Matcher
 }
+
+// CheckSession 判断会话连续性
+func (ctx *Ctx) CheckSession() Rule {
+	msg := ctx.Value.(*tgba.Message)
+	return func(ctx2 *Ctx) bool {
+		msg2, ok := ctx.Value.(*tgba.Message)
+		if !ok || msg.From == nil || msg.Chat == nil || msg2.From == nil || msg2.Chat == nil { // 确保无空
+			return false
+		}
+		return msg.From.ID == msg2.From.ID && msg.Chat.ID == msg2.Chat.ID
+	}
+}