LANCommander/LANCommander.Launcher/UI/Components/AuthenticatedView.razor

@using ConnectionState = LANCommander.Launcher.Models.ConnectionState
@inject AuthenticationService AuthenticationService
@inject NavigationManager NavigationManager
@inject KeepAliveService KeepAliveService

<CascadingValue Value="ConnectionState">
    @if (ConnectionState.IsConnected || ConnectionState.OfflineModeEnabled)
    {
        @Authenticated
    }
    else if (!IsValidating)
    {
        @NotAuthenticated
    }
</CascadingValue>

@code {
    [Parameter] public RenderFragment Authenticated { get; set; }
    [Parameter] public RenderFragment NotAuthenticated { get; set; }
    [Parameter] public bool NoAutoValidate { get; set; }

    private ConnectionState ConnectionState = default!;
    private bool IsValidating = false;

    protected override async Task OnInitializedAsync()
    {
        ConnectionState = KeepAliveService.GetConnectionState();

        AuthenticationService.OnLogin += async (sender, args) =>
        {
            await Validate();
        };
        AuthenticationService.OnRegister += async (sender, args) =>
        {
            await Validate();
        };

        if (!NoAutoValidate)
            await Validate();
    }

    public async Task Validate()
    {
        try
        {
            IsValidating = true;
            ConnectionState.IsConnected = await AuthenticationService.ValidateConnectionAsync();
            ConnectionState.OfflineModeEnabled = AuthenticationService.OfflineModeEnabled();
        }
        finally
        {
            IsValidating = false;
        }

        await InvokeAsync(StateHasChanged);
    }
}