Add breakpoint feature.

src/Infrastructure/BotSharp.Abstraction/Conversations/IConversationService.cs

@@ -35,6 +35,12 @@ Task<bool> SendMessage(string agentId,
         Func<RoleDialogModel, Task> onFunctionExecuting,
         Func<RoleDialogModel, Task> onFunctionExecuted);
 
-    List<RoleDialogModel> GetDialogHistory(int lastCount = 50);
+    List<RoleDialogModel> GetDialogHistory(int lastCount = 50, bool fromBreakpoint = true);
     Task CleanHistory(string agentId);
+
+    /// <summary>
+    /// Use this feature when you want to hide some context from LLM.
+    /// </summary>
+    /// <returns></returns>
+    Task UpdateBreakpoint();
 }

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

@@ -26,6 +26,12 @@ public class Conversation
 
     public DateTime UpdatedTime { get; set; } = DateTime.UtcNow;
     public DateTime CreatedTime { get; set; } = DateTime.UtcNow;
+
+    /// <summary>
+    /// The default value will be same as CreatedTime
+    /// It used to insert a breakpoint in the conversation to hide the previous dialogs.
+    /// </summary>
+    public DateTime Breakpoint { get; set; } = DateTime.UtcNow.AddMilliseconds(-100);
 }
 
 public class DialogElement

src/Infrastructure/BotSharp.Abstraction/Repositories/IBotSharpRepository.cs

@@ -58,6 +58,7 @@ public interface IBotSharpRepository
     Conversation GetConversation(string conversationId);
     PagedItems<Conversation> GetConversations(ConversationFilter filter);
     void UpdateConversationTitle(string conversationId, string title);
+    void UpdateConversationBreakpoint(string conversationId, DateTime breakpoint);
     List<Conversation> GetLastConversations();
     List<string> GetIdleConversations(int batchSize, int messageLimit, int bufferHours);
     bool TruncateConversation(string conversationId, string messageId, bool cleanLog = false);

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

@@ -1,5 +1,3 @@
-using BotSharp.Abstraction.Repositories;
-
 namespace BotSharp.Core.Conversations.Services;
 
 public partial class ConversationService : IConversationService

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

@@ -0,0 +1,10 @@
+namespace BotSharp.Core.Conversations.Services;
+
+public partial class ConversationService : IConversationService
+{
+    public async Task UpdateBreakpoint()
+    {
+        var db = _services.GetRequiredService<IBotSharpRepository>();
+        db.UpdateConversationBreakpoint(_conversationId, DateTime.UtcNow);
+    }
+}

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

@@ -99,14 +99,22 @@ public Task CleanHistory(string agentId)
         throw new NotImplementedException();
     }
 
-    public List<RoleDialogModel> GetDialogHistory(int lastCount = 50)
+    public List<RoleDialogModel> GetDialogHistory(int lastCount = 50, bool fromBreakpoint = true)
     {
         if (string.IsNullOrEmpty(_conversationId))
         {
             throw new ArgumentNullException("ConversationId is null.");
         }
 
         var dialogs = _storage.GetDialogs(_conversationId);
+
+        if (fromBreakpoint)
+        {
+            var db = _services.GetRequiredService<IBotSharpRepository>();
+            var conversation = db.GetConversation(_conversationId);
+            dialogs = dialogs.Where(x => x.CreatedAt >= conversation.Breakpoint).ToList();
+        }
+
         return dialogs
             .TakeLast(lastCount)
             .ToList();

src/Infrastructure/BotSharp.Core/Repository/BotSharpDbContext.cs

@@ -157,74 +157,51 @@ public bool DeleteAgentTasks()
 
     #region Conversation
     public void CreateNewConversation(Conversation conversation)
-    {
-        throw new NotImplementedException();
-    }
+        => throw new NotImplementedException();
 
     public bool DeleteConversations(IEnumerable<string> conversationIds)
-    {
-        throw new NotImplementedException();
-    }
+        => throw new NotImplementedException();
 
     public Conversation GetConversation(string conversationId)
-    {
-        throw new NotImplementedException();
-    }
+        => throw new NotImplementedException();
 
     public PagedItems<Conversation> GetConversations(ConversationFilter filter)
-    {
-        throw new NotImplementedException();
-    }
+        => throw new NotImplementedException();
 
     public List<Conversation> GetLastConversations()
-    {
-        throw new NotImplementedException();
-    }
+        => throw new NotImplementedException();
 
     public List<string> GetIdleConversations(int batchSize, int messageLimit, int bufferHours)
-    {
-        throw new NotImplementedException();
-    }
+        => throw new NotImplementedException();
 
     public List<DialogElement> GetConversationDialogs(string conversationId)
-    {
-        throw new NotImplementedException();
-    }
+        => throw new NotImplementedException();
 
     public void UpdateConversationDialogElements(string conversationId, List<DialogContentUpdateModel> updateElements)
-    {
-        throw new NotImplementedException();
-    }
+        => new NotImplementedException();
 
     public ConversationState GetConversationStates(string conversationId)
-    {
-        throw new NotImplementedException();
-    }
+        => throw new NotImplementedException();
 
     public void AppendConversationDialogs(string conversationId, List<DialogElement> dialogs)
-    {
-        throw new NotImplementedException();
-    }
+        => new NotImplementedException();
+
     public void UpdateConversationTitle(string conversationId, string title)
-    {
-        throw new NotImplementedException();
-    }
+        => new NotImplementedException();
+
+    public void UpdateConversationBreakpoint(string conversationId, DateTime breakpoint)
+        => new NotImplementedException();
+
     public void UpdateConversationStates(string conversationId, List<StateKeyValue> states)
-    {
-        throw new NotImplementedException();
-    }
+        => new NotImplementedException();
 
     public void UpdateConversationStatus(string conversationId, string status)
-    {
-        throw new NotImplementedException();
-    }
+        => new NotImplementedException();
 
     public bool TruncateConversation(string conversationId, string messageId, bool cleanLog = false)
-    {
-        throw new NotImplementedException();
-    }
+        => throw new NotImplementedException();
     #endregion
-    
+
     #region User
     public User? GetUserByEmail(string email) 
         => throw new NotImplementedException();

src/Infrastructure/BotSharp.Core/Repository/FileRepository/FileRepository.Conversation.cs

@@ -141,6 +141,23 @@ public void UpdateConversationTitle(string conversationId, string title)
             }
         }
 
+        public void UpdateConversationBreakpoint(string conversationId, DateTime breakpoint)
+        {
+            var convDir = FindConversationDirectory(conversationId);
+            if (!string.IsNullOrEmpty(convDir))
+            {
+                var convFile = Path.Combine(convDir, CONVERSATION_FILE);
+                var content = File.ReadAllText(convFile);
+                var record = JsonSerializer.Deserialize<Conversation>(content, _options);
+                if (record != null)
+                {
+                    record.UpdatedTime = DateTime.UtcNow;
+                    record.Breakpoint = breakpoint;
+                    File.WriteAllText(convFile, JsonSerializer.Serialize(record, _options));
+                }
+            }
+        }
+
         public ConversationState GetConversationStates(string conversationId)
         {
             var states = new List<StateKeyValue>();

src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs

@@ -146,10 +146,10 @@ private string GenerateJwtToken(User user)
             new Claim(JwtRegisteredClaimNames.NameId, user.Id),
             new Claim(JwtRegisteredClaimNames.UniqueName, user.UserName),
             new Claim(JwtRegisteredClaimNames.Email, user.Email),
-            new Claim(JwtRegisteredClaimNames.GivenName, user.FirstName),
-            new Claim(JwtRegisteredClaimNames.FamilyName, user.LastName),
+            new Claim(JwtRegisteredClaimNames.GivenName, user?.FirstName ?? string.Empty),
+            new Claim(JwtRegisteredClaimNames.FamilyName, user?.LastName ?? string.Empty),
             new Claim("source", user.Source),
-            new Claim("external_id", user.ExternalId??string.Empty),
+            new Claim("external_id", user.ExternalId ?? string.Empty),
             new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString())
         };
 

src/Infrastructure/BotSharp.Core/data/agents/01fcc3e5-9af7-49e6-ad7a-a760bd12dc4a/templates/planner_prompt.naive.liquid

@@ -1,5 +1,5 @@
 What is the next step based on the CONVERSATION?
-Route to the appropriate agent last handled agent based on the context. 
+Route to the last handling agent in priority.
 {% if expected_next_action_agent != empty  -%}
 Expected next action agent is {{ expected_next_action_agent }}.
 {%- endif %}

src/Infrastructure/BotSharp.OpenAPI/Controllers/ConversationController.cs

@@ -66,7 +66,7 @@ public async Task<IEnumerable<ChatResponseModel>> GetDialogs([FromRoute] string
     {
         var conv = _services.GetRequiredService<IConversationService>();
         conv.SetConversationId(conversationId, new List<string>());
-        var history = conv.GetDialogHistory();
+        var history = conv.GetDialogHistory(fromBreakpoint: false);
 
         var userService = _services.GetRequiredService<IUserService>();
         var agentService = _services.GetRequiredService<IAgentService>();

src/Plugins/BotSharp.Plugin.MongoStorage/Collections/ConversationDocument.cs

@@ -10,4 +10,5 @@ public class ConversationDocument : MongoBase
     public string Status { get; set; }
     public DateTime CreatedTime { get; set; }
     public DateTime UpdatedTime { get; set; }
+    public DateTime Breakpoint { get; set; }
 }

src/Plugins/BotSharp.Plugin.MongoStorage/Repository/MongoRepository.Conversation.cs

@@ -22,8 +22,9 @@ public void CreateNewConversation(Conversation conversation)
             Channel = conversation.Channel,
             TaskId = conversation.TaskId,
             Status = conversation.Status,
-            CreatedTime = DateTime.UtcNow,
-            UpdatedTime = DateTime.UtcNow,
+            CreatedTime = conversation.CreatedTime,
+            UpdatedTime = conversation.UpdatedTime,
+            Breakpoint = conversation.Breakpoint,
         };
 
         var dialogDoc = new ConversationDialogDocument
@@ -140,6 +141,18 @@ public void UpdateConversationTitle(string conversationId, string title)
         _dc.Conversations.UpdateOne(filterConv, updateConv);
     }
 
+    public void UpdateConversationBreakpoint(string conversationId, DateTime breakpoint)
+    {
+        if (string.IsNullOrEmpty(conversationId)) return;
+
+        var filterConv = Builders<ConversationDocument>.Filter.Eq(x => x.Id, conversationId);
+        var updateConv = Builders<ConversationDocument>.Update
+            .Set(x => x.UpdatedTime, DateTime.UtcNow)
+            .Set(x => x.Breakpoint, breakpoint);
+
+        _dc.Conversations.UpdateOne(filterConv, updateConv);
+    }
+
     public ConversationState GetConversationStates(string conversationId)
     {
         var states = new ConversationState();
@@ -208,7 +221,8 @@ public Conversation GetConversation(string conversationId)
             Dialogs = dialogElements,
             States = curStates,
             CreatedTime = conv.CreatedTime,
-            UpdatedTime = conv.UpdatedTime
+            UpdatedTime = conv.UpdatedTime,
+            Breakpoint = conv.Breakpoint
         };
     }
 
@@ -273,7 +287,8 @@ public PagedItems<Conversation> GetConversations(ConversationFilter filter)
                 Channel = conv.Channel,
                 Status = conv.Status,
                 CreatedTime = conv.CreatedTime,
-                UpdatedTime = conv.UpdatedTime
+                UpdatedTime = conv.UpdatedTime,
+                Breakpoint = conv.Breakpoint
             });
         }
 
@@ -299,7 +314,8 @@ public List<Conversation> GetLastConversations()
             Channel = c.Channel,
             Status = c.Status,
             CreatedTime = c.CreatedTime,
-            UpdatedTime = c.UpdatedTime
+            UpdatedTime = c.UpdatedTime,
+            Breakpoint = c.Breakpoint  
         }).ToList();
     }