Implemented basic store and load operation for chats

app/MindWork AI Studio/Components/Blocks/TreeItemData.cs

@@ -10,6 +10,8 @@ public class TreeItemData<T> : ITreeItem<T>
 
     public string Icon { get; init; } = string.Empty;
 
+    public bool IsChat { get; init; }
+
     public T? Value { get; init; }
 
     public bool Expandable { get; init; } = true;

app/MindWork AI Studio/Components/Blocks/Workspaces.razor

@@ -9,21 +9,30 @@
                 break;
                 
             case TreeItemData<string> treeItem:
-                <MudTreeViewItem T="ITreeItem<string>" Icon="@treeItem.Icon" Value="@item" LoadingIconColor="@Color.Info" CanExpand="@treeItem.Expandable" Items="@treeItem.Children">
+                @if (treeItem.IsChat)
+                {
+                    <MudTreeViewItem T="ITreeItem<string>" Icon="@treeItem.Icon" Value="@item" LoadingIconColor="@Color.Info" CanExpand="@treeItem.Expandable" Items="@treeItem.Children" OnClick="() => this.LoadChat(treeItem.Value)">
                         <BodyContent>
                             <div style="display: grid; grid-template-columns: 1fr auto; align-items: center; width: 100%">
                                 <MudText Style="justify-self: start;">@treeItem.Text</MudText>
-                        
-                            @if (treeItem.Value is not "root" and not "temp")
-                            {
                                 <div style="justify-self: end;">
                                     <MudIconButton Icon="@Icons.Material.Filled.Edit" Size="Size.Medium" Color="Color.Inherit"/>
                                     <MudIconButton Icon="@Icons.Material.Filled.Delete" Size="Size.Medium" Color="Color.Inherit"/>
                                 </div>
-                            }
                             </div>
                         </BodyContent>
                     </MudTreeViewItem>
+                }
+                else
+                {
+                    <MudTreeViewItem T="ITreeItem<string>" Icon="@treeItem.Icon" Value="@item" LoadingIconColor="@Color.Info" CanExpand="@treeItem.Expandable" Items="@treeItem.Children">
+                        <BodyContent>
+                            <div style="display: grid; grid-template-columns: 1fr auto; align-items: center; width: 100%">
+                                <MudText Style="justify-self: start;">@treeItem.Text</MudText>
+                            </div>
+                        </BodyContent>
+                    </MudTreeViewItem>
+                }
                 break;
                 
             case TreeButton<string> treeButton:

app/MindWork AI Studio/Components/Blocks/Workspaces.razor.cs

@@ -1,4 +1,8 @@
-using AIStudio.Chat;
+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+using AIStudio.Chat;
 using AIStudio.Settings;
 
 using Microsoft.AspNetCore.Components;
@@ -13,6 +17,22 @@ public partial class Workspaces : ComponentBase
     [Parameter]
     public ChatThread? CurrentChatThread { get; set; }
     
+    [Parameter]
+    public EventCallback<ChatThread> CurrentChatThreadChanged { get; set; }
+
+    private static readonly JsonSerializerOptions JSON_OPTIONS = new()
+    {
+        WriteIndented = true,
+        AllowTrailingCommas = true,
+        PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
+        DictionaryKeyPolicy = JsonNamingPolicy.CamelCase,
+        PropertyNameCaseInsensitive = true,
+        Converters =
+        {
+            new JsonStringEnumConverter(JsonNamingPolicy.SnakeCaseUpper),
+        }
+    };
+    
     private readonly HashSet<ITreeItem<string>> initialTreeItems = new();
     
     #region Overrides of ComponentBase
@@ -52,7 +72,7 @@ public partial class Workspaces : ComponentBase
 
     #endregion
 
-    private Task<HashSet<ITreeItem<string>>> LoadServerData(ITreeItem<string>? parent)
+    private async Task<HashSet<ITreeItem<string>>> LoadServerData(ITreeItem<string>? parent)
     {
         switch (parent)
         {
@@ -77,11 +97,16 @@ public partial class Workspaces : ComponentBase
                             // Enumerate the workspace directories:
                             foreach (var workspaceDirPath in Directory.EnumerateDirectories(workspaceDirectories))
                             {
+                                // Read the `name` file:
+                                var workspaceNamePath = Path.Join(workspaceDirPath, "name");
+                                var workspaceName = await File.ReadAllTextAsync(workspaceNamePath, Encoding.UTF8);
+                                
                                 workspaceChildren.Add(new TreeItemData<string>
                                 {
+                                    IsChat = false,
                                     Depth = item.Depth + 1,
                                     Branch = WorkspaceBranch.WORKSPACES,
-                                    Text = Path.GetFileName(workspaceDirPath),
+                                    Text = workspaceName,
                                     Icon = Icons.Material.Filled.Description,
                                     Expandable = true,
                                     Value = workspaceDirPath,
@@ -100,17 +125,22 @@ public partial class Workspaces : ComponentBase
                             // Get the workspace directory:
                             var workspaceDirPath = item.Value;
 
-                            if(workspaceDirPath is null)
-                                return Task.FromResult(new HashSet<ITreeItem<string>>());
+                            if (workspaceDirPath is null)
+                                return [];
                             
                             // Enumerate the workspace directory:
                             foreach (var chatPath in Directory.EnumerateDirectories(workspaceDirPath))
                             {
+                                // Read the `name` file:
+                                var chatNamePath = Path.Join(chatPath, "name");
+                                var chatName = await File.ReadAllTextAsync(chatNamePath, Encoding.UTF8);
+                                
                                 workspaceChildren.Add(new TreeItemData<string>
                                 {
+                                    IsChat = true,
                                     Depth = item.Depth + 1,
                                     Branch = WorkspaceBranch.WORKSPACES,
-                                    Text = Path.GetFileNameWithoutExtension(chatPath),
+                                    Text = chatName,
                                     Icon = Icons.Material.Filled.Chat,
                                     Expandable = false,
                                     Value = chatPath,
@@ -120,7 +150,7 @@ public partial class Workspaces : ComponentBase
                             workspaceChildren.Add(new TreeButton<string>(WorkspaceBranch.WORKSPACES, item.Depth + 1, "Add chat",Icons.Material.Filled.Add));
                         }
 
-                        return Task.FromResult(workspaceChildren);
+                        return workspaceChildren;
                     
                     case WorkspaceBranch.TEMPORARY_CHATS:
                         var tempChildren = new HashSet<ITreeItem<string>>();
@@ -138,24 +168,79 @@ public partial class Workspaces : ComponentBase
                         // Enumerate the workspace directories:
                         foreach (var tempChatDirPath in Directory.EnumerateDirectories(temporaryDirectories))
                         {
+                            // Read the `name` file:
+                            var chatNamePath = Path.Join(tempChatDirPath, "name");
+                            var chatName = await File.ReadAllTextAsync(chatNamePath, Encoding.UTF8);
+                            
                             tempChildren.Add(new TreeItemData<string>
                             {
+                                IsChat = true,
                                 Depth = item.Depth + 1,
                                 Branch = WorkspaceBranch.TEMPORARY_CHATS,
-                                Text = Path.GetFileName(tempChatDirPath),
+                                Text = chatName,
                                 Icon = Icons.Material.Filled.Timer,
                                 Expandable = false,
                                 Value = tempChatDirPath,
                             });
                         }
                         
-                        return Task.FromResult(tempChildren);
+                        return tempChildren;
                 }
 
-                return Task.FromResult(new HashSet<ITreeItem<string>>());
+                return [];
             
             default:
-                return Task.FromResult(new HashSet<ITreeItem<string>>());
+                return [];
+        }
+    }
+
+    public async Task StoreChat(ChatThread thread)
+    {
+        string chatDirectory;
+        if (thread.WorkspaceId == Guid.Empty)
+            chatDirectory = Path.Join(SettingsManager.DataDirectory, "tempChats", thread.ChatId.ToString());
+        else
+            chatDirectory = Path.Join(SettingsManager.DataDirectory, "workspaces", thread.WorkspaceId.ToString(), thread.ChatId.ToString());
+        
+        // Ensure the directory exists:
+        Directory.CreateDirectory(chatDirectory);
+        
+        // Save the chat name:
+        var chatNamePath = Path.Join(chatDirectory, "name");
+        await File.WriteAllTextAsync(chatNamePath, thread.Name);
+        
+        // Save the thread as thread.json:
+        var chatPath = Path.Join(chatDirectory, "thread.json");
+        await File.WriteAllTextAsync(chatPath, JsonSerializer.Serialize(thread, JSON_OPTIONS), Encoding.UTF8);
+    }
+
+    private async Task LoadChat(string? chatPath)
+    {
+        if(string.IsNullOrWhiteSpace(chatPath))
+        {
+            Console.WriteLine("Error: chat path is empty.");
+            return;
+        }
+
+        if(!Directory.Exists(chatPath))
+        {
+            Console.WriteLine($"Error: chat not found: '{chatPath}'");
+            return;
+        }
+
+        try
+        {
+            var chatData = await File.ReadAllTextAsync(Path.Join(chatPath, "thread.json"), Encoding.UTF8);
+            this.CurrentChatThread = JsonSerializer.Deserialize<ChatThread>(chatData, JSON_OPTIONS);
+            await this.CurrentChatThreadChanged.InvokeAsync(this.CurrentChatThread);
+
+            Console.WriteLine($"Loaded chat: {this.CurrentChatThread?.Name}");
+        }
+        catch (Exception e)
+        {
+            Console.WriteLine(e);
+            Console.WriteLine(e.StackTrace);
+            throw;
         }
     }
 }

app/MindWork AI Studio/Components/Pages/Chat.razor

@@ -29,9 +29,27 @@
         </MudPaper>
         <MudPaper Class="mt-1" Outlined="@true">
             <MudToolBar WrapContent="true">
+                
+                @if (this.SettingsManager.ConfigurationData.WorkspaceStorageBehavior is not WorkspaceStorageBehavior.DISABLE_WORKSPACES)
+                {
                     <MudTooltip Text="Your workspaces" Placement="Placement.Bottom">
-                    <MudIconButton Icon="@Icons.Material.Filled.SnippetFolder" OnClick="() => this.ToggleWorkspaces()" Disabled="@(this.SettingsManager.ConfigurationData.WorkspaceStorageBehavior is WorkspaceStorageBehavior.DISABLE_WORKSPACES)"/>
+                        <MudIconButton Icon="@Icons.Material.Filled.SnippetFolder" OnClick="() => this.ToggleWorkspaces()"/>
                     </MudTooltip>
+                }
+
+                @if (this.SettingsManager.ConfigurationData.WorkspaceStorageBehavior is WorkspaceStorageBehavior.STORE_CHATS_MANUALLY)
+                {
+                    <MudTooltip Text="Save chat" Placement="Placement.Bottom">
+                        <MudIconButton Icon="@Icons.Material.Filled.Save" OnClick="() => this.SaveThread()" Disabled="@(!this.CanThreadBeSaved)"/>
+                    </MudTooltip>
+                }
+
+                <MudTooltip Text="Move chat to workspace" Placement="Placement.Bottom">
+                    <MudIconButton Icon="@Icons.Material.Filled.MoveToInbox" Disabled="@(!this.CanThreadBeSaved)"/>
+                </MudTooltip>
+                
+                <MudIconButton Icon="@Icons.Material.Filled.BugReport" OnClick="() => this.StateHasChanged()"/>
+
             </MudToolBar>
         </MudPaper>
     </FooterContent>
@@ -49,7 +67,7 @@
             </MudStack>
         </MudDrawerHeader>
         <MudDrawerContainer Class="ml-6">
-            <Workspaces/>
+            <Workspaces @ref="this.workspaces" @bind-CurrentChatThread="@this.chatThread"/>
         </MudDrawerContainer>
     </MudDrawer>
 }

app/MindWork AI Studio/Components/Pages/Chat.razor.cs

@@ -1,4 +1,5 @@
 using AIStudio.Chat;
+using AIStudio.Components.Blocks;
 using AIStudio.Provider;
 using AIStudio.Settings;
 
@@ -28,6 +29,7 @@ public partial class Chat : ComponentBase
     private bool isStreaming;
     private string userInput = string.Empty;
     private bool workspacesVisible;
+    private Workspaces? workspaces = null;
     
     // Unfortunately, we need the input field reference to clear it after sending a message.
     // This is necessary because we have to handle the key events ourselves. Otherwise,
@@ -41,11 +43,6 @@ public partial class Chat : ComponentBase
         // Configure the spellchecking for the user input:
         this.SettingsManager.InjectSpellchecking(USER_INPUT_ATTRIBUTES);
         
-        // For now, we just create a new chat thread.
-        // Later we want the chats to be persisted
-        // across page loads and organize them in
-        // a chat history & workspaces.
-        this.chatThread = new("Thread 1", this.RNG.Next(), "You are a helpful assistant!", []);
         await base.OnInitializedAsync();
     }
 
@@ -57,25 +54,44 @@ public partial class Chat : ComponentBase
 
     private string InputLabel => this.IsProviderSelected ? $"Your Prompt (use selected instance '{this.selectedProvider.InstanceName}', provider '{this.selectedProvider.UsedProvider.ToName()}')" : "Select a provider first";
     
+    private bool CanThreadBeSaved => this.IsProviderSelected && this.chatThread is not null && this.chatThread.Blocks.Count > 0;
+    
     private async Task SendMessage()
     {
         if (!this.IsProviderSelected)
             return;
         
+        // Create a new chat thread if necessary:
+        var threadName = this.ExtractThreadName(this.userInput);
+        this.chatThread ??= new()
+        {
+            WorkspaceId = Guid.Empty,
+            ChatId = Guid.NewGuid(),
+            Name = threadName,
+            Seed = this.RNG.Next(),
+            SystemPrompt = "You are a helpful assistant!",
+            Blocks = [],
+        };
+        
         //
         // Add the user message to the thread:
         //
         var time = DateTimeOffset.Now;
-        this.chatThread?.Blocks.Add(new ContentBlock(time, ContentType.TEXT, new ContentText
+        this.chatThread?.Blocks.Add(new ContentBlock
         {
-            // Text content properties:
-            Text = this.userInput,
-        })
-        {
-            // Content block properties:
+            Time = time,
+            ContentType = ContentType.TEXT,
             Role = ChatRole.USER,
+            Content = new ContentText
+            {
+                Text = this.userInput,
+            },
         });
 
+        // Save the chat:
+        if (this.SettingsManager.ConfigurationData.WorkspaceStorageBehavior is WorkspaceStorageBehavior.STORE_CHATS_AUTOMATICALLY)
+            await this.SaveThread();
+        
         //
         // Add the AI response to the thread:
         //
@@ -86,9 +102,12 @@ public partial class Chat : ComponentBase
             InitialRemoteWait = true,
         };
         
-        this.chatThread?.Blocks.Add(new ContentBlock(time, ContentType.TEXT, aiText)
+        this.chatThread?.Blocks.Add(new ContentBlock
         {
+            Time = time,
+            ContentType = ContentType.TEXT,
             Role = ChatRole.AI,
+            Content = aiText,
         });
         
         // Clear the input field:
@@ -104,6 +123,10 @@ public partial class Chat : ComponentBase
         // content to be streamed.
         await aiText.CreateFromProviderAsync(this.selectedProvider.UsedProvider.CreateProvider(this.selectedProvider.InstanceName, this.selectedProvider.Hostname), this.JsRuntime, this.SettingsManager, this.selectedProvider.Model, this.chatThread);
         
+        // Save the chat:
+        if (this.SettingsManager.ConfigurationData.WorkspaceStorageBehavior is WorkspaceStorageBehavior.STORE_CHATS_AUTOMATICALLY)
+            await this.SaveThread();
+        
         // Disable the stream state:
         this.isStreaming = false;
         this.StateHasChanged();
@@ -138,4 +161,31 @@ public partial class Chat : ComponentBase
     {
         this.workspacesVisible = !this.workspacesVisible;
     }
+    
+    private async Task SaveThread()
+    {
+        if(this.workspaces is null)
+            return;
+        
+        if(this.chatThread is null)
+            return;
+        
+        if (!this.CanThreadBeSaved)
+            return;
+        
+        await this.workspaces.StoreChat(this.chatThread);
+    }
+    
+    private string ExtractThreadName(string firstUserInput)
+    {
+        // We select the first 10 words of the user input:
+        var words = firstUserInput.Split(' ', StringSplitOptions.RemoveEmptyEntries);
+        var threadName = string.Join(' ', words.Take(10));
+        
+        // If the thread name is empty, we use a default name:
+        if (string.IsNullOrWhiteSpace(threadName))
+            threadName = "Thread";
+        
+        return threadName;
+    }
 }