decePubClient/LayerComponents/CascadingState.razor

<CascadingValue IsFixed=false Value=this>
	@ChildContent
</CascadingValue>

@code {
	[Parameter] public RenderFragment ChildContent { get; set; }
	[Inject] IStorage DbStorage { get; set; }
	[Inject] ILocalStorageService Storage { get; set; }
	[Inject] IJSRuntime JS { get; set; }
	// [Inject] DataService DataService { get; set; }
	[Inject] public AppStatusService Status { get; set; }
	[Inject] ILogger<CascadingState> Logger { get; set; }

	public bool IsOnline { get; set; } = true;
	Timer IsOnlineTimer { get; set; }
	public PublicCacheData PublicCacheData { get; set; }
	public User User { get; set; }

	DotNetObjectReference<CascadingState> cascadingStateReference;

	protected override async Task OnInitializedAsync()
	{
		try
		{
			IsOnlineTimer = new Timer(async _ => await UpdateIsOnline(), new AutoResetEvent(false), 0, 10000);
			cascadingStateReference = DotNetObjectReference.Create(this);
			await JS.InvokeVoidAsync("cascadingStateInstanceReference", cascadingStateReference);
			PublicCacheData = await Storage.GetItemAsync<PublicCacheData>(nameof(PublicCacheData));
			if (PublicCacheData == null)
			{
				PublicCacheData = new();
				await UpdatePublicCache(PublicCacheData);
			}
			else
				Status.ApplyTheme(PublicCacheData.PageSettings);

			User = new();
		}
		catch (Exception ex)
		{
			Logger.LogError(ex, $"{nameof(CascadingState)}.{nameof(OnInitializedAsync)}");
		}
	}

	public async ValueTask UpdatePublicCache(PublicCacheData publicCacheData)
	{
		try
		{
			PublicCacheData = publicCacheData;
			await Storage.SetItemAsync(nameof(PublicCacheData), PublicCacheData);
			Status.ApplyTheme(PublicCacheData.PageSettings);
			StateHasChanged();
		}
		catch (Exception ex)
		{
			Console.WriteLine($"{nameof(CascadingState)}.{nameof(UpdatePublicCache)}");
			Console.WriteLine(ex.ToString());
		}
	}

	/// <summary>Changes the page settings, then saves and applies them like UpdatePublicCache.</summary>
	public ValueTask UpdatePageSettings(Action<PageSettings> change)
	{
		change(PublicCacheData.PageSettings);
		return UpdatePublicCache(PublicCacheData);
	}

	[JSInvokable]
	public async Task LogFromJs(string message, string where)
	{
		try
		{
			await ProcessError(new(message), where);
		}
		catch (Exception ex)
		{
			Logger.LogError(ex, $"{nameof(CascadingState)}.{nameof(LogFromJs)}");
		}
	}

	async Task UpdateIsOnline()
	{
		try
		{
			var latestOnlineState = await Status.IsOnline();

	//var latestOnlineState = Random.Shared.Next() % 2 == 0;
			if (latestOnlineState != IsOnline)
			{
				IsOnline = latestOnlineState;
				StateHasChanged();
			}
	// else
	// {
	// 	var pingIsOnline = await DataService.Ping();
	// 	if (pingIsOnline != IsOnline)
	// 	{
	// 		IsOnline = pingIsOnline;
	// 		StateHasChanged();
	// 	}
	// }
		}
		catch (Exception ex)
		{
			Logger.LogError(ex, $"{nameof(CascadingState)}.{nameof(UpdateIsOnline)}");
		}
	}

	public async ValueTask ProcessError(Exception ex, string where)
	{
		try
		{
			await DbStorage.AddLog(ex, where);
			Logger.LogError(ex, where);
			await Task.Run(() => {
			});
		}
		catch (Exception exception)
		{
			Logger.LogError(exception, $"{nameof(CascadingState)}.{nameof(ProcessError)}");
		}
	}

	public async ValueTask ProcessWarning(string message, string where)
	{
		try
		{
			await DbStorage.AddLog(message, where);
			Logger.LogWarning("{where} - {message}", where, message);
			await Task.Run(() => {
			});
		}
		catch (Exception exception)
		{
			Logger.LogError(exception, $"{nameof(CascadingState)}.{nameof(ProcessWarning)}");
		}
	}
}