Refactored data source validation

app/MindWork AI Studio/Dialogs/DataSourceLocalDirectoryDialog.razor

@@ -10,7 +10,7 @@
                 MaxLength="40"
                 Counter="40"
                 Immediate="@true"
-                Validation="@this.ValidateName"
+                Validation="@this.dataSourceValidation.ValidatingName"
                 Adornment="Adornment.Start"
                 AdornmentIcon="@Icons.Material.Filled.Lightbulb"
                 AdornmentColor="Color.Info"
@@ -21,13 +21,13 @@
                 Select a root directory for this data source. All data in this directory and all
                 its subdirectories will be processed for this data source.
             </MudJustifiedText>
-            <SelectDirectory @bind-Directory="@this.dataPath" Label="Selected base directory for this data source" DirectoryDialogTitle="Select the base directory" Validation="@this.ValidatePath" />
+            <SelectDirectory @bind-Directory="@this.dataPath" Label="Selected base directory for this data source" DirectoryDialogTitle="Select the base directory" Validation="@this.dataSourceValidation.ValidatePath" />
 
             <MudJustifiedText Typo="Typo.body1" Class="mb-3">
                 In order for the AI to be able to determine the appropriate data at any time, you must
                 choose an embedding method.
             </MudJustifiedText>
-            <MudSelect @bind-Value="@this.dataEmbeddingId" Label="Embedding" Class="mb-3" OpenIcon="@Icons.Material.Filled.ExpandMore" AdornmentColor="Color.Info" Adornment="Adornment.Start" Validation="@this.ValidateEmbeddingId">
+            <MudSelect @bind-Value="@this.dataEmbeddingId" Label="Embedding" Class="mb-3" OpenIcon="@Icons.Material.Filled.ExpandMore" AdornmentColor="Color.Info" Adornment="Adornment.Start" Validation="@this.dataSourceValidation.ValidateEmbeddingId">
                 @foreach (var embedding in this.AvailableEmbeddings)
                 {
                     <MudSelectItem Value="@embedding.Value">@embedding.Name</MudSelectItem>
@@ -51,7 +51,7 @@
                             @: confirm that you have read and understood this.
                         }
                     </MudJustifiedText>
-                    <MudTextSwitch @bind-Value="@this.dataUserAcknowledgedCloudEmbedding" Label="I confirm that I have read and understood the above" LabelOn="Yes, please send my data to the cloud" LabelOff="No, I will chose another embedding" Validation="@this.ValidateUserAcknowledgedCloudEmbedding"/>
+                    <MudTextSwitch @bind-Value="@this.dataUserAcknowledgedCloudEmbedding" Label="I confirm that I have read and understood the above" LabelOn="Yes, please send my data to the cloud" LabelOff="No, I will chose another embedding" Validation="@this.dataSourceValidation.ValidateUserAcknowledgedCloudEmbedding"/>
                 }
                 else
                 {

app/MindWork AI Studio/Dialogs/DataSourceLocalDirectoryDialog.razor.cs

@@ -1,5 +1,6 @@
 using AIStudio.Settings;
 using AIStudio.Settings.DataModel;
+using AIStudio.Tools.Validation;
 
 using Microsoft.AspNetCore.Components;
 
@@ -24,6 +25,8 @@ public partial class DataSourceLocalDirectoryDialog : ComponentBase
     
     private static readonly Dictionary<string, object?> SPELLCHECK_ATTRIBUTES = new();
     
+    private readonly DataSourceValidation dataSourceValidation;
+    
     /// <summary>
     /// The list of used data source names. We need this to check for uniqueness.
     /// </summary>
@@ -42,7 +45,17 @@ public partial class DataSourceLocalDirectoryDialog : ComponentBase
     
     // We get the form reference from Blazor code to validate it manually:
     private MudForm form = null!;
-    
+
+    public DataSourceLocalDirectoryDialog()
+    {
+        this.dataSourceValidation = new()
+        {
+            GetSelectedCloudEmbedding = () => this.SelectedCloudEmbedding,
+            GetPreviousDataSourceName = () => this.dataEditingPreviousInstanceName,
+            GetUsedDataSourceNames = () => this.UsedDataSourcesNames,
+        };
+    }
+
     #region Overrides of ComponentBase
 
     protected override async Task OnInitializedAsync()
@@ -79,45 +92,6 @@ public partial class DataSourceLocalDirectoryDialog : ComponentBase
 
     #endregion
     
-    private string? ValidateName(string value)
-    {
-        if(string.IsNullOrWhiteSpace(value))
-            return "The name must not be empty.";
-        
-        if (value.Length > 40)
-            return "The name must not exceed 40 characters.";
-        
-        var lowerName = value.ToLowerInvariant();
-        if(lowerName != this.dataEditingPreviousInstanceName && this.UsedDataSourcesNames.Contains(lowerName))
-            return "The name is already used by another data source. Please choose a different name.";
-        
-        return null;
-    }
-    
-    private string? ValidatePath(string value)
-    {
-        if(string.IsNullOrWhiteSpace(value))
-            return "The path must not be empty. Please select a directory.";
-        
-        return null;
-    }
-    
-    private string? ValidateEmbeddingId(string value)
-    {
-        if(string.IsNullOrWhiteSpace(value))
-            return "Please select an embedding provider.";
-        
-        return null;
-    }
-    
-    private string? ValidateUserAcknowledgedCloudEmbedding(bool value)
-    {
-        if(this.SelectedCloudEmbedding && !value)
-            return "Please acknowledge that you are aware of the cloud embedding implications.";
-        
-        return null;
-    }
-    
     private bool SelectedCloudEmbedding => !this.SettingsManager.ConfigurationData.EmbeddingProviders.FirstOrDefault(x => x.Id == this.dataEmbeddingId).IsSelfHosted;
 
     private DataSourceLocalDirectory CreateDataSource() => new()

app/MindWork AI Studio/Dialogs/DataSourceLocalFileDialog.razor

@@ -10,7 +10,7 @@
                 MaxLength="40"
                 Counter="40"
                 Immediate="@true"
-                Validation="@this.ValidateName"
+                Validation="@this.dataSourceValidation.ValidatingName"
                 Adornment="Adornment.Start"
                 AdornmentIcon="@Icons.Material.Filled.Lightbulb"
                 AdornmentColor="Color.Info"
@@ -20,13 +20,13 @@
             <MudJustifiedText Typo="Typo.body1" Class="mb-3">
                 Select a file for this data source. The content of this file will be processed for the data source.
             </MudJustifiedText>
-            <SelectFile @bind-File="@this.dataFilePath" Label="Selected file path for this data source" FileDialogTitle="Select the file" Validation="@this.ValidateFilePath" />
+            <SelectFile @bind-File="@this.dataFilePath" Label="Selected file path for this data source" FileDialogTitle="Select the file" Validation="@this.dataSourceValidation.ValidateFilePath" />
 
             <MudJustifiedText Typo="Typo.body1" Class="mb-3">
                 In order for the AI to be able to determine the appropriate data at any time, you must
                 choose an embedding method.
             </MudJustifiedText>
-            <MudSelect @bind-Value="@this.dataEmbeddingId" Label="Embedding" Class="mb-3" OpenIcon="@Icons.Material.Filled.ExpandMore" AdornmentColor="Color.Info" Adornment="Adornment.Start" Validation="@this.ValidateEmbeddingId">
+            <MudSelect @bind-Value="@this.dataEmbeddingId" Label="Embedding" Class="mb-3" OpenIcon="@Icons.Material.Filled.ExpandMore" AdornmentColor="Color.Info" Adornment="Adornment.Start" Validation="@this.dataSourceValidation.GetSelectedCloudEmbedding">
                 @foreach (var embedding in this.AvailableEmbeddings)
                 {
                     <MudSelectItem Value="@embedding.Value">@embedding.Name</MudSelectItem>
@@ -50,7 +50,7 @@
                             @: and understood this.
                         }
                     </MudJustifiedText>
-                    <MudTextSwitch @bind-Value="@this.dataUserAcknowledgedCloudEmbedding" Label="I confirm that I have read and understood the above" LabelOn="Yes, please send my data to the cloud" LabelOff="No, I will chose another embedding" Validation="@this.ValidateUserAcknowledgedCloudEmbedding"/>
+                    <MudTextSwitch @bind-Value="@this.dataUserAcknowledgedCloudEmbedding" Label="I confirm that I have read and understood the above" LabelOn="Yes, please send my data to the cloud" LabelOff="No, I will chose another embedding" Validation="@this.dataSourceValidation.ValidateUserAcknowledgedCloudEmbedding"/>
                 }
                 else
                 {

app/MindWork AI Studio/Dialogs/DataSourceLocalFileDialog.razor.cs

@@ -1,5 +1,6 @@
 using AIStudio.Settings;
 using AIStudio.Settings.DataModel;
+using AIStudio.Tools.Validation;
 
 using Microsoft.AspNetCore.Components;
 
@@ -25,6 +26,8 @@ public partial class DataSourceLocalFileDialog : ComponentBase
     
     private static readonly Dictionary<string, object?> SPELLCHECK_ATTRIBUTES = new();
     
+    private readonly DataSourceValidation dataSourceValidation;
+    
     /// <summary>
     /// The list of used data source names. We need this to check for uniqueness.
     /// </summary>
@@ -43,6 +46,16 @@ public partial class DataSourceLocalFileDialog : ComponentBase
     
     // We get the form reference from Blazor code to validate it manually:
     private MudForm form = null!;
+
+    public DataSourceLocalFileDialog()
+    {
+        this.dataSourceValidation = new()
+        {
+            GetSelectedCloudEmbedding = () => this.SelectedCloudEmbedding,
+            GetPreviousDataSourceName = () => this.dataEditingPreviousInstanceName,
+            GetUsedDataSourceNames = () => this.UsedDataSourcesNames,
+        };
+    }
     
     #region Overrides of ComponentBase
 
@@ -80,45 +93,6 @@ public partial class DataSourceLocalFileDialog : ComponentBase
 
     #endregion
     
-    private string? ValidateName(string value)
-    {
-        if(string.IsNullOrWhiteSpace(value))
-            return "The name must not be empty.";
-        
-        if (value.Length > 40)
-            return "The name must not exceed 40 characters.";
-        
-        var lowerName = value.ToLowerInvariant();
-        if(lowerName != this.dataEditingPreviousInstanceName && this.UsedDataSourcesNames.Contains(lowerName))
-            return "The name is already used by another data source. Please choose a different name.";
-        
-        return null;
-    }
-    
-    private string? ValidateFilePath(string value)
-    {
-        if(string.IsNullOrWhiteSpace(value))
-            return "The file path must not be empty. Please select a file.";
-        
-        return null;
-    }
-    
-    private string? ValidateEmbeddingId(string value)
-    {
-        if(string.IsNullOrWhiteSpace(value))
-            return "Please select an embedding provider.";
-        
-        return null;
-    }
-    
-    private string? ValidateUserAcknowledgedCloudEmbedding(bool value)
-    {
-        if(this.SelectedCloudEmbedding && !value)
-            return "Please acknowledge that you are aware of the cloud embedding implications.";
-        
-        return null;
-    }
-    
     private bool SelectedCloudEmbedding => !this.SettingsManager.ConfigurationData.EmbeddingProviders.FirstOrDefault(x => x.Id == this.dataEmbeddingId).IsSelfHosted;
 
     private DataSourceLocalFile CreateDataSource() => new()

app/MindWork AI Studio/Tools/Validation/DataSourceValidation.cs

@@ -0,0 +1,105 @@
+using ERI_Client.V1;
+
+namespace AIStudio.Tools.Validation;
+
+public sealed class DataSourceValidation
+{
+    public Func<string> GetSecretStorageIssue { get; init; } = () => string.Empty;
+    
+    public Func<string> GetPreviousDataSourceName { get; init; } = () => string.Empty;
+    
+    public Func<IEnumerable<string>> GetUsedDataSourceNames { get; init; } = () => [];
+    
+    public Func<AuthMethod> GetAuthMethod { get; init; } = () => AuthMethod.NONE;
+    
+    public Func<bool> GetSelectedCloudEmbedding { get; init; } = () => false;
+    
+    public string? ValidatingHostname(string hostname)
+    {
+        if(string.IsNullOrWhiteSpace(hostname))
+            return "Please enter a hostname, e.g., http://localhost:1234";
+        
+        if(!hostname.StartsWith("http://", StringComparison.InvariantCultureIgnoreCase) && !hostname.StartsWith("https://", StringComparison.InvariantCultureIgnoreCase))
+            return "The hostname must start with either http:// or https://";
+
+        if(!Uri.TryCreate(hostname, UriKind.Absolute, out _))
+            return "The hostname is not a valid HTTP(S) URL.";
+        
+        return null;
+    }
+    
+    public string? ValidatingSecret(string secret)
+    {
+        var authMethod = this.GetAuthMethod();
+        if(authMethod is AuthMethod.NONE or AuthMethod.KERBEROS)
+            return null;
+        
+        var secretStorageIssue = this.GetSecretStorageIssue();
+        if(!string.IsNullOrWhiteSpace(secretStorageIssue))
+            return secretStorageIssue;
+
+        if (string.IsNullOrWhiteSpace(secret))
+            return authMethod switch
+            {
+                AuthMethod.TOKEN => "Please enter your secure token.",
+                AuthMethod.USERNAME_PASSWORD => "Please enter your password.",
+
+                _ => "Please enter the secret necessary for authentication."
+            };
+        
+        return null;
+    }
+    
+    public string? ValidatingName(string dataSourceName)
+    {
+        if(string.IsNullOrWhiteSpace(dataSourceName))
+            return "The name must not be empty.";
+        
+        if (dataSourceName.Length > 40)
+            return "The name must not exceed 40 characters.";
+        
+        var lowerName = dataSourceName.ToLowerInvariant();
+        if(lowerName != this.GetPreviousDataSourceName() && this.GetUsedDataSourceNames().Contains(lowerName))
+            return "The name is already used by another data source. Please choose a different name.";
+        
+        return null;
+    }
+
+    public string? ValidatePath(string path)
+    {
+        if(string.IsNullOrWhiteSpace(path))
+            return "The path must not be empty. Please select a directory.";
+        
+        if(!Directory.Exists(path))
+            return "The path does not exist. Please select a valid directory.";
+        
+        return null;
+    }
+
+    public string? ValidateFilePath(string filePath)
+    {
+        if(string.IsNullOrWhiteSpace(filePath))
+            return "The file path must not be empty. Please select a file.";
+        
+        if(!File.Exists(filePath))
+            return "The file does not exist. Please select a valid file.";
+        
+        return null;
+    }
+
+    public string? ValidateEmbeddingId(string embeddingId)
+    {
+        if(string.IsNullOrWhiteSpace(embeddingId))
+            return "Please select an embedding provider.";
+        
+        return null;
+    }
+
+    public string? ValidateUserAcknowledgedCloudEmbedding(bool value)
+    {
+        if(this.GetSelectedCloudEmbedding() && !value)
+            return "Please acknowledge that you are aware of the cloud embedding implications.";
+        
+        return null;
+    }
+}