refine chart handler instruction & allow sending multiple messages

src/Infrastructure/BotSharp.Abstraction/Conversations/Dtos/ChatResponseDto.cs

@@ -42,6 +42,9 @@ public class ChatResponseDto : InstructResult
     [JsonPropertyName("is_streaming")]
     public bool IsStreaming { get; set; }
 
+    [JsonPropertyName("is_append")]
+    public bool IsAppend { get; set; }
+
     [JsonPropertyName("created_at")]
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
 }

src/Infrastructure/BotSharp.Abstraction/Conversations/Models/RoleDialogModel.cs

@@ -127,6 +127,13 @@ public class RoleDialogModel : ITrackableMessage
     [JsonIgnore(Condition = JsonIgnoreCondition.Always)]
     public bool IsStreaming { get; set; }
 
+    /// <summary>
+    /// Additional messages that can be sent sequentially and save to db
+    /// </summary>
+    [JsonIgnore(Condition = JsonIgnoreCondition.Always)]
+    public ChatMessageWrapper? AdditionalMessageWrapper { get; set; }
+
+
     public RoleDialogModel()
     {
     }
@@ -171,7 +178,15 @@ public static RoleDialogModel From(RoleDialogModel source,
             Instruction = source.Instruction,
             Data = source.Data,
             IsStreaming = source.IsStreaming,
-            Annotations = source.Annotations
+            Annotations = source.Annotations,
+            AdditionalMessageWrapper = source.AdditionalMessageWrapper
         };
     }
 }
+
+public class ChatMessageWrapper
+{
+    public int IntervalMilliSeconds { get; set; } = 1000;
+    public bool SaveToDb { get; set; }
+    public List<RoleDialogModel>? Messages { get; set; }
+}

src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs

@@ -1,4 +1,3 @@
-using BotSharp.Abstraction.Hooks;
 using BotSharp.Abstraction.Infrastructures.Enums;
 using BotSharp.Abstraction.Messaging;
 using BotSharp.Abstraction.Messaging.Models.RichContent;

src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationStorage.cs

@@ -1,3 +1,4 @@
+using BotSharp.Abstraction.Conversations.Models;
 using BotSharp.Abstraction.Messaging;
 using BotSharp.Abstraction.Messaging.Models.RichContent;
 using BotSharp.Abstraction.Options;
@@ -31,63 +32,21 @@ public void Append(string conversationId, IEnumerable<RoleDialogModel> dialogs)
 
         foreach ( var dialog in dialogs)
         {
-            if (dialog.Role == AgentRole.Function)
+            var innerList = new List<RoleDialogModel> { dialog };
+            if (dialog.AdditionalMessageWrapper != null
+                && dialog.AdditionalMessageWrapper.SaveToDb
+                && dialog.AdditionalMessageWrapper.Messages?.Count > 0)
             {
-                var meta = new DialogMetaData
-                {
-                    Role = dialog.Role,
-                    AgentId = dialog.CurrentAgentId,
-                    MessageId = dialog.MessageId,
-                    MessageType = dialog.MessageType,
-                    FunctionName = dialog.FunctionName,
-                    FunctionArgs = dialog.FunctionArgs,
-                    ToolCallId = dialog.ToolCallId,
-                    CreatedTime = dialog.CreatedAt
-                };
-
-                var content = dialog.Content.RemoveNewLine();
-                if (string.IsNullOrEmpty(content))
-                {
-                    continue;
-                }
-                dialogElements.Add(new DialogElement
-                {
-                    MetaData = meta,
-                    Content = dialog.Content,
-                    SecondaryContent = dialog.SecondaryContent,
-                    Payload = dialog.Payload
-                });
+                innerList.AddRange(dialog.AdditionalMessageWrapper.Messages);
             }
-            else
-            {
-                var meta = new DialogMetaData
-                {
-                    Role = dialog.Role,
-                    AgentId = dialog.CurrentAgentId,
-                    MessageId = dialog.MessageId,
-                    MessageType = dialog.MessageType,
-                    SenderId = dialog.SenderId,
-                    FunctionName = dialog.FunctionName,
-                    CreatedTime = dialog.CreatedAt
-                };
 
-                var content = dialog.Content.RemoveNewLine();
-                if (string.IsNullOrEmpty(content))
+            foreach (var item in innerList)
+            {
+                var element = BuildDialogElement(item);
+                if (element != null)
                 {
-                    continue;
+                    dialogElements.Add(element);
                 }
-
-                var richContent = dialog.RichContent != null ? JsonSerializer.Serialize(dialog.RichContent, _options.JsonSerializerOptions) : null;
-                var secondaryRichContent = dialog.SecondaryRichContent != null ? JsonSerializer.Serialize(dialog.SecondaryRichContent, _options.JsonSerializerOptions) : null;
-                dialogElements.Add(new DialogElement
-                {
-                    MetaData = meta,
-                    Content = dialog.Content,
-                    SecondaryContent = dialog.SecondaryContent,
-                    RichContent = richContent,
-                    SecondaryRichContent = secondaryRichContent,
-                    Payload = dialog.Payload
-                });
             }
         }
 
@@ -148,4 +107,67 @@ public List<RoleDialogModel> GetDialogs(string conversationId)
 
         return results;
     }
+
+    private DialogElement? BuildDialogElement(RoleDialogModel dialog)
+    {
+        DialogElement? element = null;
+
+        if (dialog.Role == AgentRole.Function)
+        {
+            var meta = new DialogMetaData
+            {
+                Role = dialog.Role,
+                AgentId = dialog.CurrentAgentId,
+                MessageId = dialog.MessageId,
+                MessageType = dialog.MessageType,
+                FunctionName = dialog.FunctionName,
+                FunctionArgs = dialog.FunctionArgs,
+                ToolCallId = dialog.ToolCallId,
+                CreatedTime = dialog.CreatedAt
+            };
+
+            var content = dialog.Content.RemoveNewLine();
+            if (!string.IsNullOrEmpty(content))
+            {
+                element = new DialogElement
+                {
+                    MetaData = meta,
+                    Content = dialog.Content,
+                    SecondaryContent = dialog.SecondaryContent,
+                    Payload = dialog.Payload
+                };
+            }
+        }
+        else
+        {
+            var meta = new DialogMetaData
+            {
+                Role = dialog.Role,
+                AgentId = dialog.CurrentAgentId,
+                MessageId = dialog.MessageId,
+                MessageType = dialog.MessageType,
+                SenderId = dialog.SenderId,
+                FunctionName = dialog.FunctionName,
+                CreatedTime = dialog.CreatedAt
+            };
+
+            var content = dialog.Content.RemoveNewLine();
+            if (!string.IsNullOrEmpty(content))
+            {
+                var richContent = dialog.RichContent != null ? JsonSerializer.Serialize(dialog.RichContent, _options.JsonSerializerOptions) : null;
+                var secondaryRichContent = dialog.SecondaryRichContent != null ? JsonSerializer.Serialize(dialog.SecondaryRichContent, _options.JsonSerializerOptions) : null;
+                element = new DialogElement
+                {
+                    MetaData = meta,
+                    Content = dialog.Content,
+                    SecondaryContent = dialog.SecondaryContent,
+                    RichContent = richContent,
+                    SecondaryRichContent = secondaryRichContent,
+                    Payload = dialog.Payload
+                };
+            }
+        }
+
+        return element;
+    }
 }

src/Infrastructure/BotSharp.Core/Routing/RoutingService.InvokeFunction.cs

@@ -65,6 +65,7 @@ public async Task<bool> InvokeFunction(string name, RoleDialogModel message, Inv
             message.StopCompletion = clonedMessage.StopCompletion;
             message.RichContent = clonedMessage.RichContent;
             message.Data = clonedMessage.Data;
+            message.AdditionalMessageWrapper = clonedMessage.AdditionalMessageWrapper;
         }
         catch (JsonException ex)
         {

src/Plugins/BotSharp.Plugin.ChartHandler/BotSharp.Plugin.ChartHandler.csproj

@@ -30,6 +30,5 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\Infrastructure\BotSharp.Core\BotSharp.Core.csproj" />
-    <ProjectReference Include="..\BotSharp.Plugin.ChatHub\BotSharp.Plugin.ChatHub.csproj" />
   </ItemGroup>
 </Project>

src/Plugins/BotSharp.Plugin.ChartHandler/Functions/PlotChartFn.cs

@@ -1,17 +1,12 @@
-using BotSharp.Abstraction.Conversations.Dtos;
-using BotSharp.Abstraction.Conversations.Enums;
 using BotSharp.Abstraction.Messaging.Models.RichContent.Template;
-using BotSharp.Abstraction.Users;
-using BotSharp.Plugin.ChatHub.Helpers;
-using System.Runtime.CompilerServices;
 
 namespace BotSharp.Plugin.ChartHandler.Functions;
 
 public class PlotChartFn : IFunctionCallback
 {
     private readonly IServiceProvider _services;
     private readonly ILogger<PlotChartFn> _logger;
-    private readonly BotSharpOptions _options;
+    private readonly ChartHandlerSettings _settings;
 
     public string Name => "util-chart-plot_chart";
     public string Indication => "Plotting chart";
@@ -20,11 +15,11 @@ public class PlotChartFn : IFunctionCallback
     public PlotChartFn(
         IServiceProvider services,
         ILogger<PlotChartFn> logger,
-        BotSharpOptions options)
+        ChartHandlerSettings settings)
     {
         _services = services;
         _logger = logger;
-        _options = options;
+        _settings = settings;
     }
 
     public async Task<bool> Execute(RoleDialogModel message)
@@ -43,7 +38,7 @@ public async Task<bool> Execute(RoleDialogModel message)
             Instruction = inst,
             LlmConfig = new AgentLlmConfig
             {
-                MaxOutputTokens = 8192
+                MaxOutputTokens = _settings?.ChartPlot?.MaxOutputTokens ?? 8192
             },
             TemplateDict = new Dictionary<string, object>
             {
@@ -52,7 +47,8 @@ public async Task<bool> Execute(RoleDialogModel message)
             }
         };
 
-        var response = await GetChatCompletion(innerAgent, [
+        var response = await GetChatCompletion(innerAgent,
+        [
             new RoleDialogModel(AgentRole.User, "Please follow the instruction to generate the javascript code.")
             {
                 CurrentAgentId = message.CurrentAgentId,
@@ -72,59 +68,32 @@ public async Task<bool> Execute(RoleDialogModel message)
             }
         };
 
-        // Send report summary after 1.5 seconds if exists
         if (!string.IsNullOrEmpty(obj?.ReportSummary))
         {
-            _ = Task.Run(async () =>
+            message.AdditionalMessageWrapper = new()
             {
-                var services = _services.CreateScope().ServiceProvider;
-                await Task.Delay(1500);
-                await SendDelayedMessage(services, obj.ReportSummary, convService.ConversationId, agent.Id, agent.Name);
-            });
+                IntervalMilliSeconds = 1500,
+                SaveToDb = true,
+                Messages = new List<RoleDialogModel>
+                {
+                    new()
+                    {
+                        Role = AgentRole.Assistant,
+                        MessageId = message.MessageId,
+                        CurrentAgentId = message.CurrentAgentId,
+                        Content = obj.ReportSummary,
+                        FunctionName = message.FunctionName,
+                        FunctionArgs = message.FunctionArgs,
+                        CreatedAt = DateTime.UtcNow
+                    }
+                }
+            };
         }
 
         message.StopCompletion = true;
         return true;
     }
 
-    private async Task SendDelayedMessage(IServiceProvider services, string text, string conversationId, string agentId, string agentName)
-    {
-        try
-        {
-            var messageId = Guid.NewGuid().ToString();
-            var messageData = new ChatResponseDto
-            {
-                ConversationId = conversationId,
-                MessageId = messageId,
-                Text = text,
-                Sender = new() { FirstName = agentName, LastName = "", Role = AgentRole.Assistant }
-            };
-
-            var dialogModel = new RoleDialogModel(AgentRole.Assistant, text)
-            {
-                MessageId = messageId,
-                CurrentAgentId = agentId,
-                CreatedAt = DateTime.UtcNow
-            };
-
-            var storage = services.GetService<IConversationStorage>();
-            storage?.Append(conversationId, dialogModel);
-            await SendEvent(services, ChatEvent.OnMessageReceivedFromAssistant, conversationId, messageData);
-
-        }
-        catch (Exception ex)
-        {
-            _logger.LogError(ex, "Failed to send delayed message");
-        }
-    }
-
-    private async Task SendEvent<T>(IServiceProvider services, string @event, string conversationId, T data, [CallerMemberName] string callerName = "")
-    {
-        var user = services.GetService<IUserIdentity>();
-        var json = JsonSerializer.Serialize(data, _options.JsonSerializerOptions);
-        await EventEmitter.SendChatEvent(services, _logger, @event, conversationId, user?.Id, json, nameof(PlotChartFn), callerName);
-    }
-
     private async Task<string> GetChatCompletion(Agent agent, List<RoleDialogModel> dialogs)
     {
         try
@@ -169,12 +138,11 @@ private string GetChartPlotInstruction(string agentId)
         var model = "gpt-5";
 
         var state = _services.GetRequiredService<IConversationStateService>();
-        var settings = _services.GetRequiredService<ChartHandlerSettings>();
         provider = state.GetState("chart_plot_llm_provider")
-                        .IfNullOrEmptyAs(settings.ChartPlot?.LlmProvider)
+                        .IfNullOrEmptyAs(_settings.ChartPlot?.LlmProvider)
                         .IfNullOrEmptyAs(provider);
         model = state.GetState("chart_plot_llm_model")
-                     .IfNullOrEmptyAs(settings.ChartPlot?.LlmModel)
+                     .IfNullOrEmptyAs(_settings.ChartPlot?.LlmModel)
                      .IfNullOrEmptyAs(model);
 
         return (provider, model);

src/Plugins/BotSharp.Plugin.ChartHandler/Settings/ChartHandlerSettings.cs

@@ -7,6 +7,7 @@ public class ChartHandlerSettings
 
 public class ChartPlotSetting
 {
-    public string LlmProvider { get; set; }
-    public string LlmModel { get; set; }
+    public string? LlmProvider { get; set; }
+    public string? LlmModel { get; set; }
+    public int? MaxOutputTokens { get; set; }
 }