feat(middle-msg): add SendMiddleMsg function

pkg/middle-msg/define.go

@@ -1,5 +1,34 @@
 package middle_msg
 
+import (
+	"context"
+
+	"gitee.com/timedb/wheatCache/pkg/errorx"
+	"gitee.com/timedb/wheatCache/pkg/event"
+)
+
 const (
 	MiddleMsgKey = "middleMsgKey"
 )
+
+func SendMiddleMsg(
+	ctx context.Context,
+	middleProduce event.ProduceInterface,
+	val interface{},
+) error {
+	if middleProduce == nil {
+		return errorx.New("middleProduce not is nil")
+	}
+
+	var eventName string
+
+	switch val.(type) {
+	case LogContext:
+		eventName = EventNameLog
+	}
+
+	msgEvent := event.NewEvent(eventName)
+	msgEvent.SetValue(MiddleMsgKey, val)
+	middleProduce.Call(ctx, msgEvent)
+	return nil
+}