CameraRowViewModel.cs

이 파일의 문서화 페이지로 가기

using DreamineVMS.Models;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Windows.Media;
 
namespace DreamineVMS.ViewModels;

public sealed class CameraRowViewModel : INotifyPropertyChanged, IDisposable
{
    private readonly CameraRuntimeState _runtimeState;
    private bool _isDisposed;

    public CameraRowViewModel(CameraDevice device, CameraRuntimeState runtimeState)
    {
        Device = device ?? throw new ArgumentNullException(nameof(device));
        _runtimeState = runtimeState ?? throw new ArgumentNullException(nameof(runtimeState));
 
        _runtimeState.PropertyChanged += OnRuntimeStatePropertyChanged;
    }

    public event PropertyChangedEventHandler? PropertyChanged;

    public CameraDevice Device { get; }

    public string Id => Device.Id;

    public string Name => Device.Name;

    public string RtspUrl => Device.RtspUrl;

    public string HlsUrl => Device.HlsUrl;

    public CameraConnectionState State => _runtimeState.State;

    public string StateText => _runtimeState.State.ToString();

    public Brush StateBrush => _runtimeState.State switch
    {
        CameraConnectionState.Connected => new SolidColorBrush(Color.FromRgb(0x22, 0xc5, 0x5e)),
        CameraConnectionState.Connecting => new SolidColorBrush(Color.FromRgb(0xf5, 0x9e, 0x0b)),
        CameraConnectionState.Faulted => new SolidColorBrush(Color.FromRgb(0xef, 0x44, 0x44)),
        _ => new SolidColorBrush(Color.FromRgb(0x6b, 0x72, 0x80))
    };

    public void Dispose()
    {
        if (_isDisposed)
        {
            return;
        }
 
        _isDisposed = true;
        _runtimeState.PropertyChanged -= OnRuntimeStatePropertyChanged;
    }

    private void OnRuntimeStatePropertyChanged(object? sender, PropertyChangedEventArgs e)
    {
        // RuntimeState의 어떤 속성이 바뀌어도 행 표시에 영향이 있으므로 일괄 알림.
        OnPropertyChanged(nameof(State));
        OnPropertyChanged(nameof(StateText));
        OnPropertyChanged(nameof(StateBrush));
    }

    private void OnPropertyChanged([CallerMemberName] string? propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}