Fix search bug in prompt related to custom item types

Closes #1626

Author: patriksvensson

src/Spectre.Console/Prompts/List/ListPrompt.cs

@@ -14,6 +14,7 @@ public ListPrompt(IAnsiConsole console, IListPromptStrategy<T> strategy)
 
     public async Task<ListPromptState<T>> Show(
         ListPromptTree<T> tree,
+        Func<T, string>? converter,
         SelectionMode selectionMode,
         bool skipUnselectableItems,
         bool searchEnabled,
@@ -41,7 +42,7 @@ public async Task<ListPromptState<T>> Show(
         }
 
         var nodes = tree.Traverse().ToList();
-        var state = new ListPromptState<T>(nodes, _strategy.CalculatePageSize(_console, nodes.Count, requestedPageSize), wrapAround, selectionMode, skipUnselectableItems, searchEnabled);
+        var state = new ListPromptState<T>(nodes, converter, _strategy.CalculatePageSize(_console, nodes.Count, requestedPageSize), wrapAround, selectionMode, skipUnselectableItems, searchEnabled);
         var hook = new ListPromptRenderHook<T>(_console, () => BuildRenderable(state));
 
         using (new RenderHookScope(_console, hook))

src/Spectre.Console/Prompts/List/ListPromptState.cs

@@ -3,6 +3,8 @@ namespace Spectre.Console;
 internal sealed class ListPromptState<T>
     where T : notnull
 {
+    private readonly Func<T, string> _converter;
+
     public int Index { get; private set; }
     public int ItemCount => Items.Count;
     public int PageSize { get; }
@@ -16,8 +18,15 @@ internal sealed class ListPromptState<T>
     public ListPromptItem<T> Current => Items[Index];
     public string SearchText { get; private set; }
 
-    public ListPromptState(IReadOnlyList<ListPromptItem<T>> items, int pageSize, bool wrapAround, SelectionMode mode, bool skipUnselectableItems, bool searchEnabled)
+    public ListPromptState(
+        IReadOnlyList<ListPromptItem<T>> items,
+        Func<T, string> converter,
+        int pageSize, bool wrapAround,
+        SelectionMode mode,
+        bool skipUnselectableItems,
+        bool searchEnabled)
     {
+        _converter = converter ?? throw new ArgumentNullException(nameof(converter));
         Items = items;
         PageSize = pageSize;
         WrapAround = wrapAround;
@@ -126,7 +135,11 @@ public bool Update(ConsoleKeyInfo keyInfo)
             if (!char.IsControl(keyInfo.KeyChar))
             {
                 search = SearchText + keyInfo.KeyChar;
-                var item = Items.FirstOrDefault(x => x.Data.ToString()?.Contains(search, StringComparison.OrdinalIgnoreCase) == true && (!x.IsGroup || Mode != SelectionMode.Leaf));
+
+                var item = Items.FirstOrDefault(x =>
+                    _converter.Invoke(x.Data).Contains(search, StringComparison.OrdinalIgnoreCase)
+                    && (!x.IsGroup || Mode != SelectionMode.Leaf));
+
                 if (item != null)
                 {
                     index = Items.IndexOf(item);
@@ -140,7 +153,10 @@ public bool Update(ConsoleKeyInfo keyInfo)
                     search = search.Substring(0, search.Length - 1);
                 }
 
-                var item = Items.FirstOrDefault(x => x.Data.ToString()?.Contains(search, StringComparison.OrdinalIgnoreCase) == true && (!x.IsGroup || Mode != SelectionMode.Leaf));
+                var item = Items.FirstOrDefault(x =>
+                    _converter.Invoke(x.Data).Contains(search, StringComparison.OrdinalIgnoreCase) &&
+                    (!x.IsGroup || Mode != SelectionMode.Leaf));
+
                 if (item != null)
                 {
                     index = Items.IndexOf(item);

src/Spectre.Console/Prompts/MultiSelectionPrompt.cs

@@ -94,7 +94,8 @@ public async Task<List<T>> ShowAsync(IAnsiConsole console, CancellationToken can
     {
         // Create the list prompt
         var prompt = new ListPrompt<T>(console, this);
-        var result = await prompt.Show(Tree, Mode, false, false, PageSize, WrapAround, cancellationToken).ConfigureAwait(false);
+        var converter = Converter ?? TypeConverterHelper.ConvertToString;
+        var result = await prompt.Show(Tree, converter, Mode, false, false, PageSize, WrapAround, cancellationToken).ConfigureAwait(false);
 
         if (Mode == SelectionMode.Leaf)
         {

src/Spectre.Console/Prompts/SelectionPrompt.cs

@@ -99,7 +99,8 @@ public async Task<T> ShowAsync(IAnsiConsole console, CancellationToken cancellat
     {
         // Create the list prompt
         var prompt = new ListPrompt<T>(console, this);
-        var result = await prompt.Show(_tree, Mode, true, SearchEnabled, PageSize, WrapAround, cancellationToken).ConfigureAwait(false);
+        var converter = Converter ?? TypeConverterHelper.ConvertToString;
+        var result = await prompt.Show(_tree, converter, Mode, true, SearchEnabled, PageSize, WrapAround, cancellationToken).ConfigureAwait(false);
 
         // Return the selected item
         return result.Items[result.Index].Data;

src/Tests/Spectre.Console.Tests/Unit/Prompts/ListPromptStateTests.cs

@@ -3,7 +3,10 @@ namespace Spectre.Console.Tests.Unit;
 public sealed class ListPromptStateTests
 {
     private ListPromptState<string> CreateListPromptState(int count, int pageSize, bool shouldWrap, bool searchEnabled)
-        => new(Enumerable.Range(0, count).Select(i => new ListPromptItem<string>(i.ToString())).ToList(), pageSize, shouldWrap, SelectionMode.Independent, true, searchEnabled);
+        => new(
+            Enumerable.Range(0, count).Select(i => new ListPromptItem<string>(i.ToString())).ToList(),
+            text => text,
+            pageSize, shouldWrap, SelectionMode.Independent, true, searchEnabled);
 
     [Fact]
     public void Should_Have_Start_Index_Zero()

src/Tests/Spectre.Console.Tests/Unit/Prompts/TextPromptTests.cs

@@ -410,4 +410,45 @@ public Task Uses_the_specified_choices_style()
         // Then
         return Verifier.Verify(console.Output);
     }
+
+    [Fact]
+    public void Should_Search_In_Remapped_Result()
+    {
+        // Given
+        var console = new TestConsole();
+        console.Profile.Capabilities.Interactive = true;
+        console.EmitAnsiSequences();
+        console.Input.PushText("2");
+        console.Input.PushKey(ConsoleKey.Enter);
+
+        var choices = new List<CustomSelectionItem>
+        {
+            new(33, "Item 1"),
+            new(34, "Item 2"),
+        };
+
+        var prompt = new SelectionPrompt<CustomSelectionItem>()
+            .Title("Select one")
+            .EnableSearch()
+            .UseConverter(o => o.Name)
+            .AddChoices(choices);
+
+        // When
+        var selection = prompt.Show(console);
+
+        // Then
+        selection.ShouldBe(choices[1]);
+    }
+}
+
+file sealed class CustomSelectionItem
+{
+    public int Value { get; }
+    public string Name { get; }
+
+    public CustomSelectionItem(int value, string name)
+    {
+        Value = value;
+        Name = name ?? throw new ArgumentNullException(nameof(name));
+    }
 }