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Convert GH extension to use MEAI and Ollama. #1

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Convert GH extension to use MEAI and Ollama. #1

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42 changes: 15 additions & 27 deletions src/blackbeard-extension-cs/Program.cs
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Original file line number Diff line number Diff line change
@@ -1,41 +1,29 @@
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.AI;

const string GithubCopilotCompletionsUrl = "https://api.githubcopilot.com/chat/completions";
const string OllamaEndpoint = "http://localhost:11434";
const string OllamaModel = "llama3";

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapGet("/", () => "Ahoy, matey! Welcome to the Blackbeard Pirate GitHub Copilot Extension!");
app.MapPost("/", async (
[FromHeader(Name = "X-GitHub-Token")] string githubToken,
[FromBody] Request userRequest) =>
app.MapPost("/", async (HttpContext ctx) =>
{
userRequest.Stream = true;
userRequest.Messages.Insert(0, new Message
var openAiRequest = await OpenAISerializationHelpers.DeserializeChatCompletionRequestAsync(ctx.Request.Body, ctx.RequestAborted);

openAiRequest.Options.ModelId = null;
openAiRequest.Messages.Insert(0, new ChatMessage
{
Role = "system",
Content = "Concisely reply as if you were Blackbeard the Pirate."
Role = ChatRole.System,
Contents = [new TextContent("Concisely reply as if you were Blackbeard the Pirate.")]
});

using HttpClient httpClient = new()
{
DefaultRequestHeaders = { Authorization = new("Bearer", githubToken) }
};
using IChatClient chatClient = new OllamaChatClient(OllamaEndpoint, OllamaModel);
var streamingResponse = chatClient.CompleteStreamingAsync(openAiRequest.Messages, openAiRequest.Options, ctx.RequestAborted);

var copilotLLMResponse = await httpClient.PostAsJsonAsync(GithubCopilotCompletionsUrl, userRequest);
return Results.Stream(await copilotLLMResponse.Content.ReadAsStreamAsync(), "application/json");
ctx.Response.StatusCode = StatusCodes.Status200OK;
ctx.Response.ContentType = "application/json";
await OpenAISerializationHelpers.SerializeStreamingAsync(ctx.Response.Body, streamingResponse, cancellationToken: ctx.RequestAborted);
});

app.Run();

public record Request
{
public bool Stream { get; set; }
public List<Message> Messages { get; set; } = [];
}

public record Message
{
public required string Role { get; set; }
public required string Content { get; set; }
}
5 changes: 5 additions & 0 deletions src/blackbeard-extension-cs/blackbeard-extension-cs.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -6,4 +6,9 @@
<ImplicitUsings>enable</ImplicitUsings>
</PropertyGroup>

<ItemGroup>
<PackageReference Include="Microsoft.Extensions.AI.Ollama" Version="9.1.0-preview.1.25065.1" />
<PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="9.1.0-preview.1.25065.1" />
</ItemGroup>

</Project>