yavsc/src/PostIt/PostIt/ViewModels/AddCircleMemberDialogViewModel.cs

132 lines
4.6 KiB
C#

using System;
using System.Collections.ObjectModel;
using System.Threading;
using System.Threading.Tasks;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using PostIt.Services;
using Yavsc.Api.Client;
namespace PostIt.ViewModels;
/// <summary>
/// View model for the "add a Yavsc user to a circle" modal.
///
/// <para>Resolves users through <see cref="IUserDirectory"/>
/// (which delegates to <c>/api/user-search</c>); the caller
/// (CirclesPage) decides whether to add the picked user to
/// the circle by calling
/// <see cref="AddCircleMemberDialogViewModel.AddCommand"/>
/// (which is bound to the dialog's "Ajouter" button).</para>
///
/// <para>The dialog itself doesn't know the target
/// <c>CircleId</c>: that's set by the caller via the
/// constructor and the dialog only triggers
/// <see cref="IUserDirectory.SearchAsync"/> against the
/// <see cref="SearchQuery"/> string. The "Add" command
/// returns the picked <see cref="UserSummary"/> via the
/// <see cref="Confirmed"/> event, and the hosting
/// <c>CirclesPage</c> then calls
/// <see cref="CircleApiClient.AddMemberAsync"/>.</para>
/// </summary>
public partial class AddCircleMemberDialogViewModel : ViewModelBase, IActionStatusViewModel
{
private readonly IUserDirectory _directory;
[ObservableProperty]
public partial string SearchQuery { get; set; } = string.Empty;
[ObservableProperty]
public partial ObservableCollection<UserSummary> Results { get; set; } = new();
[ObservableProperty]
public partial UserSummary? Selected { get; set; }
[ObservableProperty]
public partial bool IsBusy { get; set; }
[ObservableProperty]
public partial string StatusMessage { get; set; } = "Pret.";
[ObservableProperty]
public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Pret.");
/// <summary>
/// Raised when the user confirms a selection. The hosting
/// <c>CirclesPage</c> subscribes to this event and calls
/// <c>CircleApiClient.AddMemberAsync</c> with the target
/// circle id + the picked user's id. The dialog itself
/// does not know the circle id by design: separation of
/// concerns — the modal is a user picker, not a
/// "circle joiner" form.
/// </summary>
public event EventHandler<UserSummary>? Confirmed;
public AddCircleMemberDialogViewModel(IUserDirectory directory)
{
_directory = directory ?? throw new ArgumentNullException(nameof(directory));
}
public override bool CanNavigateNext { get => throw new NotImplementedException(); protected set => throw new NotImplementedException(); }
public override bool CanNavigatePrevious { get => throw new NotImplementedException(); protected set => throw new NotImplementedException(); }
/// <summary>
/// Search the directory for users matching the current
/// <see cref="SearchQuery"/>. Triggered explicitly via the
/// "Rechercher" button — no debouncing, so the caller
/// stays in control of how often the network is hit.
/// </summary>
[RelayCommand]
public async Task SearchAsync()
{
if (string.IsNullOrWhiteSpace(SearchQuery))
{
Results.Clear();
this.SetWarningStatus("Tapez un nom ou un email");
return;
}
IsBusy = true;
try
{
var hits = await _directory.SearchAsync(SearchQuery, CancellationToken.None).ConfigureAwait(true);
Results = new ObservableCollection<UserSummary>(hits ?? Array.Empty<UserSummary>());
this.SetInfoStatus($"{Results.Count} résultat(s)");
}
catch (Exception ex)
{
this.SetErrorStatus($"Erreur: {ex.Message}");
}
finally
{
IsBusy = false;
}
}
/// <summary>
/// Raise <see cref="Confirmed"/> for the currently selected
/// user. No-op when no selection has been made — keeps the
/// UI from firing an event with a null payload.
/// </summary>
[RelayCommand]
public async Task AddAsync()
{
if (Selected is null)
{
this.SetWarningStatus("Sélectionnez un utilisateur");
return;
}
Confirmed?.Invoke(this, Selected);
var app = App.Current as App
?? throw new InvalidOperationException("Application PostIt indisponible.");
await app.GoBackAsync();
}
[RelayCommand]
public async Task CloseAsync()
{
var app = App.Current as App
?? throw new InvalidOperationException("Application PostIt indisponible.");
await app.GoBackAsync();
}
}