ConsoleChat.cs

usingMicrosoft.Extensions.Hosting;
usingMicrosoft.SemanticKernel;
usingMicrosoft.SemanticKernel.AI.ChatCompletion;
usingMicrosoft.SemanticKernel.Connectors.AI.OpenAI;

/// <summary>
/// This is the main application service.
/// This takes console input, then sends it to the configured AI service, and then prints the response.
/// All conversation history is maintained in the chat history.
/// </summary>
internalclassConsoleChat:IHostedService
{
privatereadonlyKernel_kernel;
privatereadonlyIHostApplicationLifetime_lifeTime;

publicConsoleChat(Kernelkernel,IHostApplicationLifetimelifeTime)
{
this._kernel=kernel;
this._lifeTime=lifeTime;
}

/// <summary>
/// Start the service.
/// </summary>
publicTaskStartAsync(CancellationTokencancellationToken)
{
Task.Run(()=>this.ExecuteAsync(cancellationToken),cancellationToken);
returnTask.CompletedTask;
}

/// <summary>
/// Stop a running service.
/// </summary>
publicTaskStopAsync(CancellationTokencancellationToken)=>Task.CompletedTask;

/// <summary>
/// The main execution loop. It will use any of the available plugins to perform actions
/// </summary>
privateasyncTaskExecuteAsync(CancellationTokencancellationToken)
{
ChatHistorychatMessages=[];
IChatCompletionServicechatCompletionService=this._kernel.GetRequiredService<IChatCompletionService>();

// Loop till we are cancelled
while(!cancellationToken.IsCancellationRequested)
{
// Get user input
System.Console.Write("User > ");
chatMessages.AddUserMessage(Console.ReadLine()!);

// Get the chat completions
OpenAIPromptExecutionSettingsopenAIPromptExecutionSettings=new()
{
FunctionCallBehavior=FunctionCallBehavior.AutoInvokeKernelFunctions
};
IAsyncEnumerable<StreamingChatMessageContent>result=
chatCompletionService.GetStreamingChatMessageContentsAsync(
chatMessages,
executionSettings:openAIPromptExecutionSettings,
kernel:this._kernel,
cancellationToken:cancellationToken);

// Print the chat completions
ChatMessageContent?chatMessageContent=null;
awaitforeach(varcontentinresult)
{
if(content.Role.HasValue)
{
System.Console.Write("Assistant > ");
chatMessageContent=new(
content.Role??AuthorRole.Assistant,
content.ModelId!,
content.Content!,
content.InnerContent,
content.Encoding,
content.Metadata
);
}
System.Console.Write(content.Content);
chatMessageContent!.Content+=content.Content;
}
System.Console.WriteLine();
chatMessages.AddMessage(chatMessageContent!);
}
}
}