Tutorial: Enable proactive notifications

Handle notifications

The EventHandler project is a sample Azure Function application that performs the following order of operations:

1. Listens for events from an Event Hubs Instance.
2. Read from a user preference store in Azure Cosmos DB to check a user’s settings.
3. If the SendNotificationToConversation flag is true, send an event activity to a user’s active conversation with the message.
4. If the SendNotificationToMobileDevice flag is true, send a notification to the user’s mobile devce using Azure Notifications Hubs.
   • This implementation is not provided in this tutorial. Learn more on how to send push notifications to specific users using Azure Notification Hub

Configure the Event Handler project

Update the YOUR_EVENT_HUB_NAME parameter of Function1 class with your Event Hubs Instance name.

Function1.cs

[FunctionName("EventHubTrigger")]
+ public static async Task Run([EventHubTrigger("YOUR_EVENT_HUB_NAME", Connection = "EventHubConnection")] EventData[] events, ILogger log)
{
    foreach (EventData eventData in events)
    {
        try
        {
            string messageBody = Encoding.UTF8.GetString(eventData.Body.Array, eventData.Body.Offset, eventData.Body.Count);

            var data = JsonConvert.DeserializeObject<EventDataType>(messageBody);
            await SendEventToBot(data);
            await Task.Yield();
        }
        catch { }
    }
}

Publish and configure the Function App

1. Publish the EventHandler project to your Function Apps resource
2. Navigate to the resource and select Configuration

Application Strings

Select + New application setting for each of the following:

• DirectLineSecret: YOUR_BOT_DIRECT_LINE_SECRET
  • Located in the Azure Bot Service resource > Channels
• DocumentDbEndpointUrl: YOUR_COSMOS_DB_URI
• DocumentDbPrimaryKey: YOUR_COSMOS_DB_PRIMARY_KEY
  • Located in the Azure Cosmos DB account resource > Keys

Connection Strings

Select + New connection string for the following:

• EventHubConnection: YOUR_EVENT_HUB_INSTANCE_CONNECTION_STRING