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modernkeepass/WinAppCommon/ViewModels/UserControls/BreadcrumbControlVm.cs

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using System.Collections.ObjectModel;
using System.Threading.Tasks;
using GalaSoft.MvvmLight.Command;
using GalaSoft.MvvmLight.Views;
using MediatR;
using ModernKeePass.Application.Common.Models;
using ModernKeePass.Application.Group.Models;
using ModernKeePass.Application.Group.Queries.GetGroup;
using ModernKeePass.Common;
using ModernKeePass.Domain.Enums;
using ModernKeePass.Models;
namespace ModernKeePass.ViewModels
{
public class BreadcrumbControlVm
{
public ObservableCollection<BreadcrumbItem> BreadcrumbItems { get; }
public string ParentGroupName { get; private set; }
public Icon ParentGroupIcon { get; private set; } = Icon.Folder;
public RelayCommand GoBackCommand { get; }
public RelayCommand GoUpCommand { get; private set; }
public RelayCommand<int> GoToCommand { get; }
private readonly IMediator _mediator;
private readonly INavigationService _navigation;
public BreadcrumbControlVm(IMediator mediator, INavigationService navigation)
{
_mediator = mediator;
_navigation = navigation;
BreadcrumbItems = new ObservableCollection<BreadcrumbItem>();
GoBackCommand = new RelayCommand(() => _navigation.GoBack());
GoToCommand = new RelayCommand<int>(GoTo);
GoUpCommand = new RelayCommand(() => GoTo(BreadcrumbItems.Count - 1), () => !string.IsNullOrEmpty(ParentGroupName));
}
public async Task Initialize(GroupVm group)
{
if (group == null)
{
return;
}
GoBackCommand.RaiseCanExecuteChanged();
ParentGroupName = group.Title;
ParentGroupIcon = group.Icon;
BreadcrumbItems.Add(new BreadcrumbItem {Path = group.Id, Name = group.Title, Icon = group.Icon});
var parentGroup = group;
while (!string.IsNullOrEmpty(parentGroup.ParentGroupId))
{
parentGroup = await _mediator.Send(new GetGroupQuery {Id = parentGroup.ParentGroupId});
BreadcrumbItems.Add(new BreadcrumbItem {Path = parentGroup.Id, Name = parentGroup.Title, Icon = parentGroup.Icon});
}
}
private void GoTo(int index)
{
if (BreadcrumbItems.Count == 0)
{
return;
}
var breadcrumb = BreadcrumbItems[index];
_navigation.NavigateTo(Constants.Navigation.GroupPage, new NavigationItem {Id = breadcrumb.Path});
}
}
}