ensure

Returns a new event definition whose events will first go through the validator before being passed to their target. Events that don't pass the validator won't reach their targets.
Import
import ensure from '@redux-beacon/ensure';
Syntax
ensure(validator, eventDef)
Parameters
validator: Validator​
The function used to validate the event.
eventDef: EventDefinition​
The event you want to validate.
Validator
type Validator = (event: any[]) => boolean;
Accepts an event or array of events as its sole argument.
Returns true if the event is valid.
Returns false if the event is not valid.
Example
import joi from 'joi';
import ensure from '@redux-beacon/ensure'
​
const pageview = (action, prevState) => ({
  hitType: 'pageview',
  route: action.payload.location.pathname,
  referrer: prevState.currentRoute,
});
​
// Returns true if the event matches the schema
const isValidPageView = event =>
  !joi.validate(event, joi.object().keys({
    hitType: joi.string().only('pageview').required(),
    page: joi.string().disallow('/404'),
    title: joi.string(),
    location: joi.string(),
  })).error;
​
const eventsMap = {
  LOCATION_CHANGE: ensure(isValidPageView, pageview)
};
debounceEvent
combineEvents
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