package messenger // Action is used to determine what kind of message a webhook event is. type Action int const ( // UnknownAction means that the event was not able to be classified. UnknownAction Action = iota - 1 // TextAction means that the event was a text message (May contain attachments). TextAction // DeliveryAction means that the event was advising of a successful delivery to a // previous recipient. DeliveryAction // ReadAction means that the event was a previous recipient reading their respective // messages. ReadAction // PostBackAction represents post call back PostBackAction )