Rules node

Rules node is a multi-output node that allows to control the flow of the chatbot based on simple rules (for example "The topic is myTopic", "The context variable myVar is not defined"). This node replace the Topic node that will deprecated soon.

The first rule that matches trigger the redirect of the incoming message to the related output and stops the chain of rules.

This node is useful to create loops in the flow, for example to keep asking some questions to the user until a list of needed information (context variables) are filled.

Rules can be created programmatically by an upstream Function node passing array of rules in the message payload:

msg.payload = [
  {
    type: 'hasNotVariable',
    variable: 'my_variable'
  },
  {
    type: 'catchAll'
  }
];
return msg;

Available parameters for the msg.payload

Name	Type	Description
rules	array of [rule]	The list of rules

The [button] object

Name	Type	Description
type	string	Type of rule: inbound, outbound, isTopicEmpty, catchAll, isNotTopic, isTopic, hasNotVariable, hasVariable
topic	string	Match the rule if the flow topic matches/doesn't match the specified topic. Required for isNotTopic and isTopic
variable	string	Match the rule if the context variable is defined/not defined. Required for hasVariable and hasNotVariable