public HalBot(HalBot9000Accessors accessors, ILoggerFactory loggerFactory, QnAMaker qnAMaker)
{
if (loggerFactory == null)
{
throw new System.ArgumentNullException(nameof(loggerFactory));
}
_logger = loggerFactory.CreateLogger <HalBot>();
_logger.LogTrace("Turn start.");
_accessors = accessors ?? throw new System.ArgumentNullException(nameof(accessors));
_qnAMaker = qnAMaker;
}
/// <summary>
/// This method gets called by the runtime. Use this method to add services to the container.
/// </summary>
/// <param name="services">
/// The <see cref="IServiceCollection" /> specifies the contract for a collection of service
/// descriptors.
/// </param>
/// <seealso cref="IStatePropertyAccessor{T}" />
/// <seealso cref="https://docs.microsoft.com/en-us/aspnet/web-api/overview/advanced/dependency-injection" />
/// <seealso
/// cref="https://docs.microsoft.com/en-us/azure/bot-service/bot-service-manage-channels?view=azure-bot-service-4.0" />
public void ConfigureServices(IServiceCollection services)
{
// We're going to use MemoryStorage here. This is really only suitable for development.
// In a future lab, we'll switch to more robust options.
IStorage storage = new MemoryStorage();
// declare these here, so we can add them to the services collection outside of the "AddBot" block.
// If you try to do "services.AddSingleton" inside of the AddBot block, the HalBot constructor will fail
// to get the QnAMaker instance
BotConfiguration botConfig = null;
QnAMaker qnaMaker = null;
// Configures the bot
services.AddBot <HalBot>(options =>
{
var secretKey = Configuration.GetSection("botFileSecret")?.Value;
var botFilePath = Configuration.GetSection("botFilePath")?.Value;
// Loads .bot configuration file and adds a singleton that your Bot can access through dependency injection.
botConfig = BotConfiguration.Load(botFilePath ?? @".\HalBot9000.bot", secretKey);
// Retrieve current endpoint.
var environment = _isProduction ? "production" : "development";
foreach (var serviceConfig in botConfig.Services)
{
switch (serviceConfig.Type)
{
case ServiceTypes.Endpoint:
if (serviceConfig is EndpointService endpointService)
{
// initialize the credential provider for the bot endpoint
options.CredentialProvider =
new SimpleCredentialProvider(endpointService.AppId, endpointService.AppPassword);
}
break;
case ServiceTypes.QnA:
if (serviceConfig is QnAMakerService qnaMakerService)
{
// creates a QnA Maker endpoint and allows it to be injected as a singleton
var qnaEndpoint = new QnAMakerEndpoint
{
Host = qnaMakerService.Hostname,
EndpointKey = qnaMakerService.EndpointKey,
KnowledgeBaseId = qnaMakerService.KbId
};
qnaMaker = new QnAMaker(qnaEndpoint);
}
break;
default:
throw new NotImplementedException($"The service type {serviceConfig.Type} is not supported by this bot.");
}
}
// Creates a logger for the application to use.
ILogger logger = _loggerFactory.CreateLogger <HalBot>();
// Catches any errors that occur during a conversation turn and logs them.
options.OnTurnError = async(context, exception) =>
{
logger.LogError($"Exception caught : {exception}");
await context.SendActivityAsync("Sorry, it looks like something went wrong.");
};
});
services.AddSingleton(sp =>
botConfig ??
throw new InvalidOperationException("The .bot config file could not be loaded."));
services.AddSingleton(sp =>
qnaMaker ?? throw new InvalidOperationException(
"The QnAMaker was never initialized. Missing configuration in the .bot config file."));
// This adds a singleton instance of HalBot9000Accessors to dependency injection.
services.AddSingleton(sp =>
{
// Initializes the user state object. This manages the lifecycle of objects scoped to a user.
var userState = new UserState(storage);
// Creates a property accessor for UserProfile that is scoped to the user
var userProfilePropertyAccessor =
userState.CreateProperty <UserProfile>(HalBot9000Accessors.UserProfileStateName);
var accessors = new HalBot9000Accessors(userState)
{
UserProfile = userProfilePropertyAccessor
};
return(accessors);
});
}