Added Hetzner as an experimental LLM provider (#912)

app/MindWork AI Studio/Provider/Hetzner/ProviderHetzner.cs

@@ -0,0 +1,93 @@
+using System.Runtime.CompilerServices;
+
+using AIStudio.Chat;
+using AIStudio.Provider.OpenAI;
+using AIStudio.Settings;
+
+namespace AIStudio.Provider.Hetzner;
+
+public sealed class ProviderHetzner() : BaseProvider(LLMProviders.HETZNER, new Uri("https://inference.hetzner.com/api/v1/"), ExternalHttpTrustPolicy.SYSTEM_TRUST_ONLY, LOGGER)
+{
+    private static readonly ILogger<ProviderHetzner> LOGGER = Program.LOGGER_FACTORY.CreateLogger<ProviderHetzner>();
+
+    #region Implementation of IProvider
+
+    /// <inheritdoc />
+    public override string Id => LLMProviders.HETZNER.ToSecretId();
+
+    /// <inheritdoc />
+    public override string InstanceName { get; set; } = "Hetzner (Experimental)";
+
+    /// <inheritdoc />
+    public override bool HasModelLoadingCapability => true;
+
+    /// <inheritdoc />
+    public override async IAsyncEnumerable<ContentStreamChunk> StreamChatCompletion(Model chatModel, ChatThread chatThread, SettingsManager settingsManager, [EnumeratorCancellation] CancellationToken token = default)
+    {
+        await foreach (var content in this.StreamOpenAICompatibleChatCompletion<ChatCompletionAPIRequest, ChatCompletionDeltaStreamLine, NoChatCompletionAnnotationStreamLine>(
+                           "Hetzner",
+                           chatModel,
+                           chatThread,
+                           settingsManager,
+                           async (systemPrompt, apiParameters) =>
+                           {
+                               var messages = await chatThread.Blocks.BuildMessagesUsingNestedImageUrlAsync(this.Provider, chatModel);
+
+                               return new ChatCompletionAPIRequest
+                               {
+                                   Model = chatModel.Id,
+                                   Messages = [systemPrompt, ..messages],
+                                   Stream = true,
+                                   AdditionalApiParameters = apiParameters
+                               };
+                           },
+                           token: token))
+            yield return content;
+    }
+
+    #pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously
+    /// <inheritdoc />
+    public override async IAsyncEnumerable<ImageURL> StreamImageCompletion(Model imageModel, string promptPositive, string promptNegative = FilterOperator.String.Empty, ImageURL referenceImageURL = default, [EnumeratorCancellation] CancellationToken token = default)
+    {
+        yield break;
+    }
+    #pragma warning restore CS1998 // Async method lacks 'await' operators and will run synchronously
+
+    /// <inheritdoc />
+    public override Task<TranscriptionResult> TranscribeAudioAsync(Model transcriptionModel, string audioFilePath, SettingsManager settingsManager, CancellationToken token = default)
+    {
+        return Task.FromResult(TranscriptionResult.Failure());
+    }
+
+    /// <inheritdoc />
+    public override Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
+    {
+        return Task.FromResult<IReadOnlyList<IReadOnlyList<float>>>([]);
+    }
+
+    /// <inheritdoc />
+    public override Task<ModelLoadResult> GetTextModels(string? apiKeyProvisional = null, CancellationToken token = default)
+    {
+        return this.LoadModelsResponse<ModelsResponse>(SecretStoreType.LLM_PROVIDER, "models", modelResponse => modelResponse.Data, token, apiKeyProvisional);
+    }
+
+    /// <inheritdoc />
+    public override Task<ModelLoadResult> GetImageModels(string? apiKeyProvisional = null, CancellationToken token = default)
+    {
+        return Task.FromResult(ModelLoadResult.FromModels([]));
+    }
+
+    /// <inheritdoc />
+    public override Task<ModelLoadResult> GetEmbeddingModels(string? apiKeyProvisional = null, CancellationToken token = default)
+    {
+        return Task.FromResult(ModelLoadResult.FromModels([]));
+    }
+
+    /// <inheritdoc />
+    public override Task<ModelLoadResult> GetTranscriptionModels(string? apiKeyProvisional = null, CancellationToken token = default)
+    {
+        return Task.FromResult(ModelLoadResult.FromModels([]));
+    }
+
+    #endregion
+}