Add ExpandoTree for hierarchical expandable nodes

BlazorOpenApi/Controls/Expander.razor

@@ -1,4 +1,5 @@
-<div class="expander @Class">
+<CascadingValue Name="OpenAPIUI_ExpandoTree_Parent" Value="_anchor">
+    <div class="expander @Class">
         <div class="ex-header @HeaderClass">
             @Title
             <div onclick="@(() => Toggle())">
@@ -22,6 +23,7 @@
             @ChildContent
         }
     </div>
+</CascadingValue>
 
 @code {
     [Parameter]
@@ -35,9 +37,24 @@
     [Parameter]
     public string Class { get; set; } = "";
 
+    [CascadingParameter(Name = "OpenAPIUI_ExpandoTree")]        public IExpandoTree Tree   { get; set; } = null!;
+    [CascadingParameter(Name = "OpenAPIUI_ExpandoTree_Parent")] public string Parent { get; set; } = "";
+
+    private string _anchor = $"anc{Random.Shared.Next():X8}";
+
+    protected override void OnAfterRender(bool firstRender)
+    {
+        if (!firstRender)
+            return;
+
+        Tree.Add(Title, _anchor, Parent, Collapsed);
+        Collapsed = Tree.IsCollapsed(Title);
+    }
+
     void Toggle()
     {
         Collapsed = !Collapsed;
+        Tree.Collapse(_anchor, Collapsed);
         StateHasChanged();
     }
 }

BlazorOpenApi/Controls/OperationControl.razor

@@ -48,11 +48,19 @@
                 <RequestBodyControl Value="@Value.RequestBody"/>
                 <ResponsesControl Value="@Value.Responses" />
 
+                @if (true)
+                {
+                    var example = GenerateExampleData();
+                    if ( !string.IsNullOrWhiteSpace(example) )
+                    {
                         <div class="example-data">
                             <h3>Example Data</h3>
                             <pre>@GenerateExampleData()</pre>
                         </div>
                     }
+                
+                }
+            }
         </div>
     }
 }
@@ -85,7 +93,7 @@
         var exampleData = new Dictionary<string, object>();
 
         // Generate example data for parameters
-        foreach (var parameter in Value.Parameters)
+        foreach (var parameter in Value.Parameters.Where(x => x.In == ParameterLocation.Query))
         {
             if (parameter.Example != null)
             {
@@ -121,7 +129,10 @@
             }
         }
 
-        return JsonSerializer.Serialize(exampleData, new JsonSerializerOptions { WriteIndented = true });
+        return exampleData.Count == 0 
+            ? "" 
+            : JsonSerializer.Serialize(exampleData, new JsonSerializerOptions { WriteIndented = true })
+            ;
     }
 
     private object GenerateExampleFromSchema(OpenApiSchema? schema)

BlazorOpenApi/ExpandoTree.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace BlazorOpenApi;
+
+internal class ExpandoTree : IExpandoTree
+{
+    private readonly Dictionary<string, ExpandoTreeNode> _nodes = new();
+    private readonly List<string> _order = new();
+
+    public void Add(string name, string anchor, string parentAnchor, bool collapsed)
+    {
+        if (_nodes.ContainsKey(anchor))
+        {
+            throw new InvalidOperationException($"A node with anchor '{anchor}' already exists.");
+        }
+
+        var node = new ExpandoTreeNode
+        {
+            Name         = name,
+            Anchor       = anchor,
+            ParentAnchor = parentAnchor,
+            Collapsed    = collapsed
+        };
+
+        _nodes[anchor] = node;
+        _order.Add(anchor);
+    }
+
+    public void Collapse(string anchor, bool collapsed)
+    {
+        if (_nodes.TryGetValue(anchor, out var node))
+        {
+            node.Collapsed = collapsed;
+        }
+        else
+        {
+            throw new KeyNotFoundException($"No node found with anchor '{anchor}'.");
+        }
+    }
+
+    public bool IsCollapsed(string anchor)
+    {
+        return _nodes.TryGetValue(anchor, out var node) && node.Collapsed;
+    }
+
+    public bool Exists(string anchor) => _nodes.ContainsKey(anchor);
+
+    public ExpandoTreeNode[] GetChildren(string anchor) => _order
+            .Where(x => _nodes[x].ParentAnchor == anchor)
+            .Select(x => _nodes[x])
+            .ToArray();
+}

BlazorOpenApi/IExpandoTree.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BlazorOpenApi;
+
+public class ExpandoTreeNode
+{
+    public string Name { get; set; } = string.Empty;
+    public string Anchor { get; set; } = string.Empty;
+    public string ParentAnchor { get; set; } = string.Empty;
+    public bool Collapsed { get; set; }
+}
+
+public interface IExpandoTree
+{
+    void Add(string name, string anchor, string parentAnchor, bool collapsed);
+    void Collapse(string anchor, bool collapsed);
+    bool IsCollapsed(string anchor);
+    bool Exists(string anchor);
+    ExpandoTreeNode[] GetChildren(string anchor);
+}
+
+//implement IExpandoTree

BlazorOpenApi/OpenAPIUIControl.razor

@@ -2,13 +2,16 @@
 @using Microsoft.OpenApi.Models
 @using Microsoft.OpenApi.Readers
 
+
 @if (Palette != null )
 {
     @PaletteStr
 }
 
 <div class="openapi-ui">
-    <CascadingValue Value="@_api">
+    <CascadingValue Value="@_api" IsFixed="true">
+        <CascadingValue Name="OpenAPIUI_ExpandoTree" Value="_tree" IsFixed="true">
+
             <HeaderControl Value="@_api.Info" DownloadUrl="@Url" />
             <ServersControl Value="@_api.Servers" />
             @if (_api.Paths?.Count > 0)
@@ -27,6 +30,8 @@
                 <h2>Components</h2>
                 <ComponentsControl Value="@_api.Components" />
             }
+
+        </CascadingValue>
     </CascadingValue>
 </div>
 
@@ -35,8 +40,11 @@
     [Parameter] public string Json { get; set; } = "";
     [Parameter] public OpenApiUiPalette? Palette { get; set; }
 
+
     private string _loadedFor = "";
+
     private OpenApiDocument _api = new();
+    private IExpandoTree _tree = new ExpandoTree();
 
     private MarkupString PaletteStr => Palette?.AsMarkupString ?? new();
 
@@ -98,4 +106,6 @@
             _api = new();
         }
     }
+
+
 }