session incoming message redesigned.

chatSession.go

 		} else {
 			log.Println("write session to " + path)
 			//save state
-			err = ss.state.Save(openID, ss.Procedure)
+			err = ss.state.Save()
 			if err != nil {
 				log.Printf("Error: cannot write session data %s", openID)
 				log.Println(err)
 	openID := v.header.FromUserName
 	//kfSendTxtAs(openID, "信息收到"+v.header.MsgType, "孙鹏")
 	//are we in an existing procedure
-	inProc, state := isInProc(openID) //if inside a procedure, resume last saved state
-	if inProc {
-		ss.state = serveProc(state, v) //transit to new state
+	proc, found := AllProc[ss.Procedure]
+	if found {
+		proc.serve(ss, v) //transit to new state
 	} else {
-		state, processed := serveCommand(openID, v) //menu or txt command e.g. search
-		if !processed {                             // transfer to Customer Service (kf)
-			ss.state.response, _ = BuildTextMsg(openID, "已转接校友会理事会，稍后答复您")
-		} else {
-			ss.state = state
-		}
-	}
-
-	if ss.state.response != "" {
-		v.instantResponse <- ss.state.response
-	}
-
-	if !isEndingState(state) {
-		err := saveChatState(openID, state.Procedure, state)
-		if err != nil {
-			log.Println("Error Cannot Save chat sate")
-			log.Println(err)
-			log.Println(state)
+		processed := ss.serveCommand(v) //menu or txt command e.g. search
+		if !processed {                 // transfer to Customer Service (kf)
+			//start transfer
+			ss.state.response, _ = BuildKFTransferAnyOneMsg(openID)
+			v.immediateResponse(ss.state.response)
+			kfSendTxt(openID, "已转接校友会理事会，稍后答复您")
 		}
-	} else { //state ending
-		cleanProcedure(openID, state.Procedure)
 	}
 	return
 }