public async Task RegisterUserNotifications()
{
string deviceToken = GetDeviceToken();
var notificationsSubscriptions = GetNotificationsSubscriptions();
if (string.IsNullOrEmpty(deviceToken))
{
return;
}
var credentials = new BasicAWSCredentials(
AppSettings.Instance.AwsKey,
AppSettings.Instance.AwsSecret
);
var client = new AmazonSimpleNotificationServiceClient(
credentials,
Amazon.RegionEndpoint.EUWest1
);
if (string.IsNullOrEmpty(notificationsSubscriptions.ApplicationEndPoint) ||
notificationsSubscriptions.DeviceToken != deviceToken)
{
// **********************************************
// de-register old endpoint and all subscriptions
if (!string.IsNullOrEmpty(notificationsSubscriptions.ApplicationEndPoint))
{
try
{
var response = await client.DeleteEndpointAsync(new DeleteEndpointRequest { EndpointArn = notificationsSubscriptions.ApplicationEndPoint });
if (response.HttpStatusCode != System.Net.HttpStatusCode.OK)
{
ShowAlert("Debug", $"Error eliminando endpoint: {response.HttpStatusCode}");
}
}
catch { /*Silent error in case endpoint doesn´t exist */ }
notificationsSubscriptions.ApplicationEndPoint = null;
foreach (var sub in notificationsSubscriptions.Subscriptions)
{
try
{
await client.UnsubscribeAsync(sub.Value);
}
catch { /*Silent error in case endpoint doesn´t exist */ }
}
notificationsSubscriptions.Subscriptions.Clear();
}
// register with SNS to create a new endpoint
var endPointResponse = await client.CreatePlatformEndpointAsync(
new CreatePlatformEndpointRequest
{
Token = deviceToken,
PlatformApplicationArn = Device.RuntimePlatform == Device.iOS ?
AppSettings.Instance.AwsPlatformApplicationArnIOS :
AppSettings.Instance.AwsPlatformApplicationArnAndroid
}
);
if (endPointResponse.HttpStatusCode != System.Net.HttpStatusCode.OK)
{
ShowAlert("Debug", $"Error registrando endpoint: {endPointResponse.HttpStatusCode}, {endPointResponse.ResponseMetadata}");
}
// Save device token and application endpoint created
notificationsSubscriptions.DeviceToken = deviceToken;
notificationsSubscriptions.ApplicationEndPoint = endPointResponse.EndpointArn;
}
// Retrieve subscriptions
var subscriptions = await AudioLibrary.Instance.GetUserSubscriptions(false);
if (subscriptions == null)
{
subscriptions = new UserSubscriptions {
Subscriptions = new List <Models.Api.Subscription>()
}
}
;
// Register non existings subscriptions
var subscriptionsCodes = subscriptions.Subscriptions.Select(s => s.Code).ToList();
foreach (var code in subscriptionsCodes)
{
if (!notificationsSubscriptions.Subscriptions.ContainsKey(code))
{
var topicArn = AppSettings.Instance.AwsTopicArn;
topicArn += string.IsNullOrEmpty(code) ? "" : $"-{code}";
if (!await TopicExists(topicArn, client))
{
var topicResponse = await client.CreateTopicAsync(new CreateTopicRequest { Name = $"{AppSettings.Instance.AwsTopicName}-{code}" });
if (topicResponse.HttpStatusCode != System.Net.HttpStatusCode.OK)
{
ShowAlert("Debug", $"Error creando topic: {topicResponse.HttpStatusCode}, {topicResponse.ResponseMetadata}");
}
topicArn = topicResponse.TopicArn;
}
// Subscribe
var subscribeResponse = await client.SubscribeAsync(new SubscribeRequest
{
Protocol = "application",
Endpoint = notificationsSubscriptions.ApplicationEndPoint,
TopicArn = topicArn
});
if (subscribeResponse.HttpStatusCode != System.Net.HttpStatusCode.OK)
{
ShowAlert("Debug", $"Error creando suscripción: {subscribeResponse.HttpStatusCode}, {subscribeResponse.ResponseMetadata}");
}
// Add to the list
notificationsSubscriptions.Subscriptions.Add(code, subscribeResponse.SubscriptionArn);
}
}
// Remove subscriptions not in user list
var currentSubscriptions = notificationsSubscriptions.Subscriptions.ToList();
foreach (var subs in currentSubscriptions)
{
if (!subscriptionsCodes.Contains(subs.Key))
{
try
{
await client.UnsubscribeAsync(subs.Value);
}
catch { /*Silent error in case endpoint doesn´t exist */ }
notificationsSubscriptions.Subscriptions.Remove(subs.Key);
}
}
// Save notifications subscriptions
await SaveNotificationsSubscriptions(notificationsSubscriptions);
}