ncipollina/alexa-net-lambda

Simple package to enable Alexa Skill development in .Net with Dependency Injection

Alexa Skills Base Lambda Function

Package Version

Build Status	Nuget

Simple package to enable Alexa Skill development in .Net with Dependency Injection.

Setup

In order to get started with this package, you will need to install the package first.

Install-Package Alexa.Net.Lambda

Handler

A custom ILambdaHandler will need to be implemented to handle the actual request from Alexa. The handler should look something like the following. In the code below, IInputService is injected into the handler via Dependency Injection.

public class RequestHandler : ILambdaHandler<SkillRequest, SkillResponse>
{
    private readonly IInputService _inputService;
 
    public RequestHandler(IInputService inputService, ITransientService transientService, IScopedService scopedService)
    {
        _inputService = inputService ?? throw new ArgumentNullException(nameof(inputService));
    }

    public async Task<SkillResponse> HandleAsync(SkillRequest request, ILambdaContext context)
    {
        return await _inputService.ProcessInput(request);
    }
}

DI Setup

In order to register items with the DI framework, the AlexaSkillFunction should be implemented. Override the Init method to configure your services and any other startup type of items, such as logging etc.

public class Function : AlexaSkillFunction
{
    protected override void Init(IHostBuilder builder)
    {
        builder.ConfigureLogging(logging =>
            {
                logging.AddJsonConsole();
                logging.AddDebug();
            })
            .UseHandler<RequestHandler, SkillRequest, SkillResponse>()
            .ConfigureServices(services =>
            {
                services.AddSingleton<IInputService, InputService>();
            });
    }
}

In the above code the Handler is registered via the UseHandler extension method.