Add consoles pages.

Marechai.App/Presentation/ViewModels/ConsolesListViewModel.cs

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+#nullable enable
+
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Input;
+using Marechai.App.Helpers;
+using Marechai.App.Presentation.Models;
+using Marechai.App.Services;
+using Uno.Extensions.Navigation;
+
+namespace Marechai.App.Presentation.ViewModels;
+
+/// <summary>
+///     ViewModel for displaying a filtered list of consoles
+/// </summary>
+public partial class ConsolesListViewModel : ObservableObject
+{
+    private readonly ConsolesService                _consolesService;
+    private readonly IConsolesListFilterContext     _filterContext;
+    private readonly IStringLocalizer               _localizer;
+    private readonly ILogger<ConsolesListViewModel> _logger;
+    private readonly INavigator                     _navigator;
+
+    [ObservableProperty]
+    private ObservableCollection<ConsoleListItem> _consolesList = [];
+
+    [ObservableProperty]
+    private string _errorMessage = string.Empty;
+
+    [ObservableProperty]
+    private string _filterDescription = string.Empty;
+
+    [ObservableProperty]
+    private bool _hasError;
+
+    [ObservableProperty]
+    private bool _isDataLoaded;
+
+    [ObservableProperty]
+    private bool _isLoading;
+
+    [ObservableProperty]
+    private string _pageTitle = string.Empty;
+
+    public ConsolesListViewModel(ConsolesService                consolesService, IStringLocalizer localizer,
+                                 ILogger<ConsolesListViewModel> logger,          INavigator       navigator,
+                                 IConsolesListFilterContext     filterContext)
+    {
+        _consolesService         = consolesService;
+        _localizer               = localizer;
+        _logger                  = logger;
+        _navigator               = navigator;
+        _filterContext           = filterContext;
+        LoadData                 = new AsyncRelayCommand(LoadDataAsync);
+        GoBackCommand            = new AsyncRelayCommand(GoBackAsync);
+        NavigateToConsoleCommand = new AsyncRelayCommand<ConsoleListItem>(NavigateToConsoleAsync);
+    }
+
+    public IAsyncRelayCommand                  LoadData                 { get; }
+    public ICommand                            GoBackCommand            { get; }
+    public IAsyncRelayCommand<ConsoleListItem> NavigateToConsoleCommand { get; }
+
+    /// <summary>
+    ///     Gets or sets the filter type
+    /// </summary>
+    public ConsoleListFilterType FilterType
+    {
+        get => _filterContext.FilterType;
+        set => _filterContext.FilterType = value;
+    }
+
+    /// <summary>
+    ///     Gets or sets the filter value
+    /// </summary>
+    public string FilterValue
+    {
+        get => _filterContext.FilterValue;
+        set => _filterContext.FilterValue = value;
+    }
+
+    /// <summary>
+    ///     Loads consoles based on the current filter
+    /// </summary>
+    private async Task LoadDataAsync()
+    {
+        try
+        {
+            IsLoading    = true;
+            ErrorMessage = string.Empty;
+            HasError     = false;
+            IsDataLoaded = false;
+            ConsolesList.Clear();
+
+            _logger.LogInformation("LoadDataAsync called. FilterType={FilterType}, FilterValue={FilterValue}",
+                                   FilterType,
+                                   FilterValue);
+
+            // Update title and filter description based on filter type
+            UpdateFilterDescription();
+
+            // Load consoles from the API based on the current filter
+            await LoadConsolesFromApiAsync();
+
+            _logger.LogInformation("LoadConsolesFromApiAsync completed. ConsolesList.Count={Count}",
+                                   ConsolesList.Count);
+
+            if(ConsolesList.Count == 0)
+            {
+                ErrorMessage = _localizer["No consoles found for this filter"].Value;
+                HasError     = true;
+
+                _logger.LogWarning("No consoles found for filter: {FilterType} {FilterValue}", FilterType, FilterValue);
+            }
+            else
+                IsDataLoaded = true;
+        }
+        catch(Exception ex)
+        {
+            _logger.LogError(ex, "Error loading consoles: {Exception}", ex.Message);
+            ErrorMessage = _localizer["Failed to load consoles. Please try again later."].Value;
+            HasError     = true;
+        }
+        finally
+        {
+            IsLoading = false;
+        }
+    }
+
+    /// <summary>
+    ///     Updates the title and filter description based on the current filter
+    /// </summary>
+    private void UpdateFilterDescription()
+    {
+        switch(FilterType)
+        {
+            case ConsoleListFilterType.All:
+                PageTitle         = _localizer["All Consoles"];
+                FilterDescription = _localizer["Browsing all consoles in the database"];
+
+                break;
+
+            case ConsoleListFilterType.Letter:
+                if(!string.IsNullOrEmpty(FilterValue) && FilterValue.Length == 1)
+                {
+                    PageTitle         = $"{_localizer["Consoles Starting with"]} {FilterValue}";
+                    FilterDescription = $"{_localizer["Showing consoles that start with"]} {FilterValue}";
+                }
+
+                break;
+
+            case ConsoleListFilterType.Year:
+                if(!string.IsNullOrEmpty(FilterValue) && int.TryParse(FilterValue, out int year))
+                {
+                    PageTitle         = $"{_localizer["Consoles from"]} {year}";
+                    FilterDescription = $"{_localizer["Showing consoles released in"]} {year}";
+                }
+
+                break;
+        }
+    }
+
+    /// <summary>
+    ///     Loads consoles from the API based on the current filter
+    /// </summary>
+    private async Task LoadConsolesFromApiAsync()
+    {
+        try
+        {
+            List<MachineDto> consoles = FilterType switch
+                                        {
+                                            ConsoleListFilterType.Letter when FilterValue.Length == 1 =>
+                                                await _consolesService.GetConsolesByLetterAsync(FilterValue[0]),
+
+                                            ConsoleListFilterType.Year when int.TryParse(FilterValue, out int year) =>
+                                                await _consolesService.GetConsolesByYearAsync(year),
+
+                                            _ => await _consolesService.GetAllConsolesAsync()
+                                        };
+
+            // Add consoles to the list sorted by name
+            foreach(MachineDto console in consoles.OrderBy(c => c.Name))
+            {
+                int year = console.Introduced?.Year ?? 0;
+                int id   = UntypedNodeExtractor.ExtractInt(console.Id);
+
+                _logger.LogInformation("Console: {Name}, Introduced: {Introduced}, Year: {Year}, Company: {Company}, ID: {Id}",
+                                       console.Name,
+                                       console.Introduced,
+                                       year,
+                                       console.Company,
+                                       id);
+
+                ConsolesList.Add(new ConsoleListItem
+                {
+                    Id           = id,
+                    Name         = console.Name ?? string.Empty,
+                    Year         = year,
+                    Manufacturer = console.Company ?? string.Empty
+                });
+            }
+        }
+        catch(Exception ex)
+        {
+            _logger.LogError(ex, "Error loading consoles from API");
+        }
+    }
+
+    /// <summary>
+    ///     Navigates back to the consoles main view
+    /// </summary>
+    private async Task GoBackAsync()
+    {
+        await _navigator.NavigateViewModelAsync<ConsolesViewModel>(this);
+    }
+
+    /// <summary>
+    ///     Navigates to the console detail view
+    /// </summary>
+    private async Task NavigateToConsoleAsync(ConsoleListItem? console)
+    {
+        if(console is null) return;
+
+        _logger.LogInformation("Navigating to console detail: {ConsoleName} (ID: {ConsoleId})",
+                               console.Name,
+                               console.Id);
+
+        var navParam = new MachineViewNavigationParameter
+        {
+            MachineId        = console.Id,
+            NavigationSource = this
+        };
+
+        await _navigator.NavigateViewModelAsync<MachineViewViewModel>(this, data: navParam);
+    }
+}
+
+/// <summary>
+///     Data model for a console in the list
+/// </summary>
+public class ConsoleListItem
+{
+    public int    Id           { get; set; }
+    public string Name         { get; set; } = string.Empty;
+    public int    Year         { get; set; }
+    public string Manufacturer { get; set; } = string.Empty;
+}