ViewModels/GenreViewModel.cs - main - bomjkee/AvaloniaEntityApp

ViewModels/GenreViewModel.cs
93 строки2 KB
bomjkee
first commit
23 фев 2025, 00:18
23 фев 2025, 00:18e1949b1
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Threading.Tasks;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using Avalonia.Threading;
using AvaloniaApp.Services;
using AvaloniaApp.Models;

namespace AvaloniaApp.ViewModels;

public partial class GenreViewModel : ViewModelBase
{
    private readonly LibraryDataService _libraryData;

    [ObservableProperty]
    private ObservableCollection<Genre> _genres = new ObservableCollection<Genre>();

    [ObservableProperty]
    private Genre? _selectedGenre;

    [ObservableProperty]
    private string _name = string.Empty;

    [ObservableProperty]
    private string? _description = string.Empty;


    public GenreViewModel(LibraryDataService libraryData)
    {
        _libraryData = libraryData;
        _libraryData.Genres.CollectionChanged += (s, e) => UpdateGenres();
    }
    
    private void UpdateGenres()
    {
        Genres = new ObservableCollection<Genre>(_libraryData.Genres);
    }

    [RelayCommand]
    private async Task AddGenreAsync()
    {
        if (string.IsNullOrEmpty(Name) || SelectedGenre?.Name == Name) return;

        var genre = new Genre
        {
            Name = Name,
            Description = Description
        };

        await _libraryData.AddGenreAsync(genre);
        ClearInput();
    }

    [RelayCommand]
    private async Task UpdateGenreAsync()
    {
        if (SelectedGenre == null || string.IsNullOrEmpty(Name)) return;

        SelectedGenre.Name = Name;
        SelectedGenre.Description = Description;

        await _libraryData.UpdateGenreAsync(SelectedGenre);
        ClearInput();
    }

    [RelayCommand]
    private async Task DeleteGenreAsync()
    {
        if (SelectedGenre == null) return;

        await _libraryData.DeleteGenreAsync(SelectedGenre);
        ClearInput();
    }

    [RelayCommand]
    private void ClearInput()
    {
        Name = string.Empty;
        Description = string.Empty;
        SelectedGenre = null;
    }

    partial void OnSelectedGenreChanged(Genre? value)
    {
        if (value != null)
        {
            Name = value.Name;
            Description = value.Description;
        }
    }
}