feat(ui): add RepoImportModalViewModel with candidate merge logic

src/ClaudeDo.Ui/ViewModels/Modals/RepoImportModalViewModel.cs

@@ -0,0 +1,121 @@
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using ClaudeDo.Data;
+using ClaudeDo.Data.Models;
+using ClaudeDo.Data.Repositories;
+using ClaudeDo.Ui.Services;
+using CommunityToolkit.Mvvm.Input;
+using Microsoft.EntityFrameworkCore;
+
+namespace ClaudeDo.Ui.ViewModels.Modals;
+
+public sealed partial class RepoImportModalViewModel : ViewModelBase
+{
+    private readonly IDbContextFactory<ClaudeDoDbContext> _dbFactory;
+    private readonly HashSet<string> _existingDirs = new(StringComparer.OrdinalIgnoreCase);
+
+    public ObservableCollection<RepoImportItemViewModel> Repos { get; } = new();
+
+    public Action? CloseAction { get; set; }
+
+    public int CreateCount => Repos.Count(r => r.IsChecked && !r.AlreadyAdded);
+    public bool CanCreate => CreateCount > 0;
+    public string CreateButtonText => $"Create {CreateCount} list(s)";
+
+    public RepoImportModalViewModel(IDbContextFactory<ClaudeDoDbContext> dbFactory)
+    {
+        _dbFactory = dbFactory;
+    }
+
+    public async Task LoadAsync(CancellationToken ct = default)
+    {
+        Repos.Clear();
+        _existingDirs.Clear();
+
+        await using var ctx = await _dbFactory.CreateDbContextAsync(ct);
+        var lists = new ListRepository(ctx);
+        foreach (var l in await lists.GetAllAsync(ct))
+        {
+            if (!string.IsNullOrWhiteSpace(l.WorkingDir))
+                _existingDirs.Add(l.WorkingDir!);
+        }
+        NotifyCreateState();
+    }
+
+    public void AddFolders(IEnumerable<string> folders)
+    {
+        var current = new HashSet<string>(
+            Repos.Select(r => r.FullPath), StringComparer.OrdinalIgnoreCase);
+
+        foreach (var folder in folders)
+        {
+            var found = RepoScanner.Scan(folder);
+            foreach (var item in BuildCandidates(found, current, _existingDirs))
+            {
+                item.PropertyChanged += OnItemChanged;
+                Repos.Add(item);
+                current.Add(item.FullPath);
+            }
+        }
+        NotifyCreateState();
+    }
+
+    public static List<RepoImportItemViewModel> BuildCandidates(
+        IEnumerable<RepoCandidate> found,
+        IReadOnlySet<string> currentPaths,
+        IReadOnlySet<string> existingDirs)
+    {
+        var items = new List<RepoImportItemViewModel>();
+        foreach (var c in found)
+        {
+            if (currentPaths.Contains(c.FullPath)) continue;
+            items.Add(new RepoImportItemViewModel
+            {
+                Name = c.Name,
+                FullPath = c.FullPath,
+                AlreadyAdded = existingDirs.Contains(c.FullPath),
+                IsChecked = true,
+            });
+        }
+        return items;
+    }
+
+    private void OnItemChanged(object? sender, PropertyChangedEventArgs e)
+    {
+        if (e.PropertyName == nameof(RepoImportItemViewModel.IsChecked))
+            NotifyCreateState();
+    }
+
+    private void NotifyCreateState()
+    {
+        OnPropertyChanged(nameof(CreateCount));
+        OnPropertyChanged(nameof(CanCreate));
+        OnPropertyChanged(nameof(CreateButtonText));
+    }
+
+    [RelayCommand]
+    private async Task CreateAsync()
+    {
+        var toCreate = Repos.Where(r => r.IsChecked && !r.AlreadyAdded).ToList();
+        if (toCreate.Count > 0)
+        {
+            await using var ctx = await _dbFactory.CreateDbContextAsync();
+            var lists = new ListRepository(ctx);
+            foreach (var r in toCreate)
+            {
+                await lists.AddAsync(new ListEntity
+                {
+                    Id = Guid.NewGuid().ToString("N"),
+                    Name = r.Name,
+                    WorkingDir = r.FullPath,
+                    DefaultCommitType = CommitTypeRegistry.DefaultType,
+                    CreatedAt = DateTime.UtcNow,
+                });
+            }
+        }
+        CloseAction?.Invoke();
+    }
+
+    [RelayCommand]
+    private void Cancel() => CloseAction?.Invoke();
+}

tests/ClaudeDo.Ui.Tests/RepoImportCandidatesTests.cs

@@ -0,0 +1,48 @@
+using ClaudeDo.Ui.Services;
+using ClaudeDo.Ui.ViewModels.Modals;
+
+namespace ClaudeDo.Ui.Tests;
+
+public sealed class RepoImportCandidatesTests
+{
+    [Fact]
+    public void BuildCandidates_NewRepo_IsCheckedAndNotAlreadyAdded()
+    {
+        var found = new[] { new RepoCandidate("repo-a", @"C:\src\repo-a") };
+        var current = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        var existing = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+
+        var items = RepoImportModalViewModel.BuildCandidates(found, current, existing);
+
+        Assert.Single(items);
+        Assert.True(items[0].IsChecked);
+        Assert.False(items[0].AlreadyAdded);
+        Assert.Equal("repo-a", items[0].Name);
+    }
+
+    [Fact]
+    public void BuildCandidates_ExistingWorkingDir_IsMarkedAlreadyAdded()
+    {
+        var found = new[] { new RepoCandidate("repo-a", @"C:\src\repo-a") };
+        var current = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        var existing = new HashSet<string>(new[] { @"c:\src\repo-a" }, StringComparer.OrdinalIgnoreCase);
+
+        var items = RepoImportModalViewModel.BuildCandidates(found, current, existing);
+
+        Assert.Single(items);
+        Assert.True(items[0].AlreadyAdded);
+        Assert.True(items[0].IsChecked); // already-added rows render ticked
+    }
+
+    [Fact]
+    public void BuildCandidates_SkipsPathsAlreadyShown()
+    {
+        var found = new[] { new RepoCandidate("repo-a", @"C:\src\repo-a") };
+        var current = new HashSet<string>(new[] { @"c:\src\repo-a" }, StringComparer.OrdinalIgnoreCase);
+        var existing = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+
+        var items = RepoImportModalViewModel.BuildCandidates(found, current, existing);
+
+        Assert.Empty(items);
+    }
+}