Awesome

Alexa.NET.ProactiveEvents

Small library to help with the Alexa ProactiveEvents API

Setup your skill to allow proactive events

You have to onboard your skill with the proactive events API

This is a specific process and so the best documentation is the Amazon docs on the subject

Getting a token for Proactive Events

With the client ID and secret from your Amazon developer console

var messaging = new AccessTokenClient(AccessTokenClient.ApiDomainBaseAddress);
var details = await messaging.Send("clientId","clientSecret");
var token = details.Token;

Creating a new Event

There are several event types, each in their own namespace, the simplest example is one of a Weather Alert

using Alexa.NET.ProactiveEvents.WeatherAlerts;
...
var eventToSend = new WeatherAlert(WeatherAlertType.Snowstorm);

Localised Attributes

Some alerts have required fields which must be created with a string per locale for each you support. These are created as LocaleAttributes.

var localeAttribute = new LocaleAttributes();
localeAttribute.Add("en-GB","GBLocale");
localeAttribute.Add("en-US","USLocale");

or if you're only in one locale

var localeAttribute = new LocaleAttributes("en-GB","GBLocale");
var eventToSend = new WeatherAlert(WeatherAlertType.Tornado,localeAttribute);

Creating a request to a single User ID

var request = new Alexa.NET.ProactiveEvents.UserEventRequest("userId",eventToSend)
{
    ExpiryTime = DateTimeOffset.Now.AddMinutes(10),
    ReferenceId = Guid.NewGuid().ToString("N"),
    TimeStamp = DateTimeOffset.Now,
};

Creating a request to all subscribed users

var request = new BroadcastEventRequest(eventToSend)
{
    ExpiryTime = DateTimeOffset.Now.AddMinutes(10),
    ReferenceId = Guid.NewGuid().ToString("N"),
    TimeStamp = DateTimeOffset.Now,
};

Sending a request

var client = new ProactiveEventsClient(
ProactiveEventsClient.EuropeEndpoint, token ,true); 
// Change true to false for a live environment
await client.Send(request);

Receiving events when a user changes their subscriptions

In the constructor of the function/API setup place the following code

new ProactiveSubscriptionChangedRequestHandler().AddToRequestHandler();

and then you can check your request type

if (input.Request is ProactiveSubscriptionChangedRequest request)
{
    var remainingEventTypes = request.Subscriptions;
}