feat: 新增工具调用

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application/Services/Chat/AiChatService.cs

@@ -43,11 +43,15 @@ public class AiChatService : ApplicationService
     private readonly ILogger<AiChatService> _logger;
     private readonly AiGateWayManager _aiGateWayManager;
     private readonly PremiumPackageManager _premiumPackageManager;
+    private readonly ChatManager _chatManager;
 
     public AiChatService(IHttpContextAccessor httpContextAccessor,
         AiBlacklistManager aiBlacklistManager,
         ISqlSugarRepository<AiModelEntity> aiModelRepository,
-        ILogger<AiChatService> logger, AiGateWayManager aiGateWayManager, PremiumPackageManager premiumPackageManager)
+        ILogger<AiChatService> logger,
+        AiGateWayManager aiGateWayManager,
+        PremiumPackageManager premiumPackageManager,
+        ChatManager chatManager)
     {
         _httpContextAccessor = httpContextAccessor;
         _aiBlacklistManager = aiBlacklistManager;
@@ -55,6 +59,7 @@ public class AiChatService : ApplicationService
         _logger = logger;
         _aiGateWayManager = aiGateWayManager;
         _premiumPackageManager = premiumPackageManager;
+        _chatManager = chatManager;
     }
 
 
@@ -140,9 +145,19 @@ public class AiChatService : ApplicationService
             }
         }
 
-        //ai网关代理httpcontext
+        // 判断是否有工具调用
-        await _aiGateWayManager.CompleteChatStreamForStatisticsAsync(_httpContextAccessor.HttpContext, input,
+        if (input.Tools != null && input.Tools.Count > 0)
-            CurrentUser.Id, sessionId, null, cancellationToken);
+        {
+            // 使用 ChatManager 处理支持工具调用的对话
+            await _chatManager.CompleteChatWithToolsAsync(_httpContextAccessor.HttpContext, input,
+                CurrentUser.Id, sessionId, null, cancellationToken);
+        }
+        else
+        {
+            // 使用原来的 AiGateWayManager 处理普通对话
+            await _aiGateWayManager.CompleteChatStreamForStatisticsAsync(_httpContextAccessor.HttpContext, input,
+                CurrentUser.Id, sessionId, null, cancellationToken);
+        }
     }
 
 

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/Managers/ChatManager.cs

@@ -0,0 +1,326 @@
+using System.Collections.Concurrent;
+using System.Text;
+using System.Text.Json;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Serialization;
+using Volo.Abp.Domain.Services;
+using Yi.Framework.AiHub.Domain.AiGateWay;
+using Yi.Framework.AiHub.Domain.Entities;
+using Yi.Framework.AiHub.Domain.Entities.Model;
+using Yi.Framework.AiHub.Domain.Shared.Dtos;
+using Yi.Framework.AiHub.Domain.Shared.Dtos.OpenAi;
+using Yi.Framework.AiHub.Domain.Shared.Enums;
+using Yi.Framework.SqlSugarCore.Abstractions;
+using ThorJsonSerializer = Yi.Framework.AiHub.Domain.AiGateWay.ThorJsonSerializer;
+
+namespace Yi.Framework.AiHub.Domain.Managers;
+
+public class ChatManager : DomainService
+{
+    private readonly AiGateWayManager _aiGateWayManager;
+    private readonly ISqlSugarRepository<AiModelEntity> _aiModelRepository;
+    private readonly ILogger<ChatManager> _logger;
+    private readonly AiMessageManager _aiMessageManager;
+    private readonly UsageStatisticsManager _usageStatisticsManager;
+
+    public ChatManager(
+        AiGateWayManager aiGateWayManager,
+        ISqlSugarRepository<AiModelEntity> aiModelRepository,
+        ILogger<ChatManager> logger,
+        AiMessageManager aiMessageManager,
+        UsageStatisticsManager usageStatisticsManager)
+    {
+        _aiGateWayManager = aiGateWayManager;
+        _aiModelRepository = aiModelRepository;
+        _logger = logger;
+        _aiMessageManager = aiMessageManager;
+        _usageStatisticsManager = usageStatisticsManager;
+    }
+
+    /// <summary>
+    /// 支持工具调用的流式对话
+    /// </summary>
+    /// <param name="httpContext"></param>
+    /// <param name="request"></param>
+    /// <param name="userId"></param>
+    /// <param name="sessionId"></param>
+    /// <param name="tokenId"></param>
+    /// <param name="cancellationToken"></param>
+    public async Task CompleteChatWithToolsAsync(
+        HttpContext httpContext,
+        ThorChatCompletionsRequest request,
+        Guid? userId = null,
+        Guid? sessionId = null,
+        Guid? tokenId = null,
+        CancellationToken cancellationToken = default)
+    {
+        var response = httpContext.Response;
+        // 设置响应头，声明是 SSE 流
+        response.ContentType = "text/event-stream;charset=utf-8;";
+        response.Headers.TryAdd("Cache-Control", "no-cache");
+        response.Headers.TryAdd("Connection", "keep-alive");
+
+        var modelDescribe = await GetModelAsync(ModelApiTypeEnum.OpenAi, request.Model);
+        var chatService = LazyServiceProvider.GetRequiredKeyedService<IChatCompletionService>(modelDescribe.HandlerName);
+
+        var tokenUsage = new ThorUsageResponse();
+        var messageQueue = new ConcurrentQueue<string>();
+        var backupSystemContent = new StringBuilder();
+        var isComplete = false;
+
+        // 启动后台任务来消费队列
+        var outputTask = Task.Run(async () =>
+        {
+            while (!(isComplete && messageQueue.IsEmpty))
+            {
+                if (messageQueue.TryDequeue(out var message))
+                {
+                    await response.WriteAsync(message, Encoding.UTF8, cancellationToken).ConfigureAwait(false);
+                    await response.Body.FlushAsync(cancellationToken).ConfigureAwait(false);
+                }
+
+                if (!isComplete)
+                {
+                    await Task.Delay(TimeSpan.FromMilliseconds(75), cancellationToken).ConfigureAwait(false);
+                }
+                else
+                {
+                    await Task.Delay(10, cancellationToken).ConfigureAwait(false);
+                }
+            }
+        }, cancellationToken);
+
+        try
+        {
+            // 多轮工具调用循环
+            var conversationMessages = request.Messages ?? new List<ThorChatMessage>();
+            var maxIterations = 10; // 防止无限循环
+            var currentIteration = 0;
+
+            while (currentIteration < maxIterations)
+            {
+                currentIteration++;
+
+                // 更新请求消息
+                request.Messages = conversationMessages;
+
+                // 调用 AI API
+                var completeChatResponse = chatService.CompleteChatStreamAsync(modelDescribe, request, cancellationToken);
+
+                var currentToolCalls = new List<ThorToolCall>();
+                var hasToolCalls = false;
+                var currentContent = new StringBuilder();
+
+                await foreach (var data in completeChatResponse)
+                {
+                    data.SupplementalMultiplier(modelDescribe.Multiplier);
+
+                    if (data.Usage is not null && (data.Usage.CompletionTokens > 0 || data.Usage.OutputTokens > 0))
+                    {
+                        tokenUsage = data.Usage;
+                    }
+
+                    // 检查是否有工具调用
+                    if (data.Choices?.FirstOrDefault()?.Delta?.ToolCalls != null)
+                    {
+                        hasToolCalls = true;
+                        foreach (var toolCall in data.Choices.First().Delta.ToolCalls)
+                        {
+                            // 累积工具调用信息
+                            var existingToolCall = currentToolCalls.FirstOrDefault(tc => tc.Id == toolCall.Id);
+                            if (existingToolCall == null)
+                            {
+                                currentToolCalls.Add(toolCall);
+                            }
+                            else
+                            {
+                                // 合并工具调用的 arguments（流式返回可能是分片的）
+                                if (existingToolCall.Function != null && toolCall.Function?.Arguments != null)
+                                {
+                                    existingToolCall.Function.Arguments += toolCall.Function.Arguments;
+                                }
+                            }
+                        }
+                    }
+
+                    // 检查 finish_reason
+                    var finishReason = data.Choices?.FirstOrDefault()?.FinishReason;
+                    if (finishReason == "tool_calls")
+                    {
+                        hasToolCalls = true;
+                    }
+
+                    // 累积内容
+                    var content = data.Choices?.FirstOrDefault()?.Delta.Content;
+                    if (!string.IsNullOrEmpty(content))
+                    {
+                        currentContent.Append(content);
+                    }
+
+                    var message = System.Text.Json.JsonSerializer.Serialize(data, ThorJsonSerializer.DefaultOptions);
+                    backupSystemContent.Append(content);
+                    messageQueue.Enqueue($"data: {message}\n\n");
+                }
+
+                // 如果没有工具调用，结束循环
+                if (!hasToolCalls || currentToolCalls.Count == 0)
+                {
+                    break;
+                }
+
+                // 发送工具调用状态消息
+                var toolCallStatusMessage = new
+                {
+                    type = "tool_call_status",
+                    status = "calling_tools",
+                    tool_calls = currentToolCalls
+                };
+                var statusJson = System.Text.Json.JsonSerializer.Serialize(toolCallStatusMessage, ThorJsonSerializer.DefaultOptions);
+                messageQueue.Enqueue($"data: {statusJson}\n\n");
+
+                // 将 AI 的工具调用消息添加到历史
+                conversationMessages.Add(new ThorChatMessage
+                {
+                    Role = ThorChatMessageRoleConst.Assistant,
+                    Content = currentContent.ToString(),
+                    ToolCalls = currentToolCalls
+                });
+
+                // 执行工具调用
+                foreach (var toolCall in currentToolCalls)
+                {
+                    try
+                    {
+                        // TODO: 实现 MCP 工具调用逻辑
+                        // 这里需要根据 toolCall.Function.Name 和 toolCall.Function.Arguments 调用相应的工具
+                        // 示例：
+                        // var toolResult = await InvokeMcpToolAsync(toolCall.Function.Name, toolCall.Function.Arguments, cancellationToken);
+
+                        var toolResult = "TODO: 实现 MCP 工具调用";
+
+                        // 将工具结果添加到消息历史
+                        conversationMessages.Add(ThorChatMessage.CreateToolMessage(toolResult, toolCall.Id));
+
+                        // 发送工具执行结果消息
+                        var toolResultMessage = new
+                        {
+                            type = "tool_call_result",
+                            tool_call_id = toolCall.Id,
+                            tool_name = toolCall.Function?.Name,
+                            result = toolResult
+                        };
+                        var resultJson = System.Text.Json.JsonSerializer.Serialize(toolResultMessage, ThorJsonSerializer.DefaultOptions);
+                        messageQueue.Enqueue($"data: {resultJson}\n\n");
+                    }
+                    catch (Exception ex)
+                    {
+                        _logger.LogError(ex, $"工具调用失败: {toolCall.Function?.Name}");
+
+                        // 将错误信息添加到消息历史
+                        var errorMessage = $"工具调用失败: {ex.Message}";
+                        conversationMessages.Add(ThorChatMessage.CreateToolMessage(errorMessage, toolCall.Id));
+
+                        // 发送工具执行错误消息
+                        var toolErrorMessage = new
+                        {
+                            type = "tool_call_error",
+                            tool_call_id = toolCall.Id,
+                            tool_name = toolCall.Function?.Name,
+                            error = errorMessage
+                        };
+                        var errorJson = System.Text.Json.JsonSerializer.Serialize(toolErrorMessage, ThorJsonSerializer.DefaultOptions);
+                        messageQueue.Enqueue($"data: {errorJson}\n\n");
+                    }
+                }
+
+                // 继续下一轮对话，让 AI 根据工具结果生成回复
+            }
+        }
+        catch (Exception e)
+        {
+            _logger.LogError(e, $"AI对话异常");
+            var errorContent = $"对话AI异常，异常信息：\n当前AI模型：{request.Model}\n异常信息：{e.Message}\n异常堆栈：{e}";
+            var model = new ThorChatCompletionsResponse()
+            {
+                Choices = new List<ThorChatChoiceResponse>()
+                {
+                    new ThorChatChoiceResponse()
+                    {
+                        Delta = new ThorChatMessage()
+                        {
+                            Content = errorContent
+                        }
+                    }
+                }
+            };
+            var message = JsonConvert.SerializeObject(model, new JsonSerializerSettings
+            {
+                ContractResolver = new CamelCasePropertyNamesContractResolver()
+            });
+            backupSystemContent.Append(errorContent);
+            messageQueue.Enqueue($"data: {message}\n\n");
+        }
+
+        // 断开连接
+        messageQueue.Enqueue("data: [DONE]\n\n");
+        isComplete = true;
+
+        await outputTask;
+
+        // 保存消息和统计信息
+        await _aiMessageManager.CreateUserMessageAsync(userId, sessionId,
+            new Shared.Dtos.MessageInputDto
+            {
+                Content = sessionId is null ? "不予存储" : request.Messages?.LastOrDefault()?.MessagesStore ?? string.Empty,
+                ModelId = request.Model,
+                TokenUsage = tokenUsage,
+            }, tokenId);
+
+        await _aiMessageManager.CreateSystemMessageAsync(userId, sessionId,
+            new Shared.Dtos.MessageInputDto
+            {
+                Content = sessionId is null ? "不予存储" : backupSystemContent.ToString(),
+                ModelId = request.Model,
+                TokenUsage = tokenUsage
+            }, tokenId);
+
+        await _usageStatisticsManager.SetUsageAsync(userId, request.Model, tokenUsage, tokenId);
+    }
+
+    /// <summary>
+    /// 获取模型
+    /// </summary>
+    private async Task<AiModelDescribe> GetModelAsync(ModelApiTypeEnum modelApiType, string modelId)
+    {
+        var aiModelDescribe = await _aiModelRepository._DbQueryable
+            .LeftJoin<AiAppAggregateRoot>((model, app) => model.AiAppId == app.Id)
+            .Where((model, app) => model.ModelId == modelId)
+            .Where((model, app) => model.ModelApiType == modelApiType)
+            .Select((model, app) =>
+                new AiModelDescribe
+                {
+                    AppId = app.Id,
+                    AppName = app.Name,
+                    Endpoint = app.Endpoint,
+                    ApiKey = app.ApiKey,
+                    OrderNum = model.OrderNum,
+                    HandlerName = model.HandlerName,
+                    ModelId = model.ModelId,
+                    ModelName = model.Name,
+                    Description = model.Description,
+                    AppExtraUrl = app.ExtraUrl,
+                    ModelExtraInfo = model.ExtraInfo,
+                    Multiplier = model.Multiplier
+                })
+            .FirstAsync();
+        if (aiModelDescribe is null)
+        {
+            throw new UserFriendlyException($"【{modelId}】模型当前版本【{modelApiType}】格式不支持");
+        }
+
+        return aiModelDescribe;
+    }
+}