Remotely/Server/Components/LoaderHarness.razor

@using Bitbound.SimpleMessenger;
@using Remotely.Server.Models.Messages;
@inherits MessengerSubscriber

@if (_loaderShown)
{
    <LoadingSignal StatusMessage="@_statusMessage" />
}

@code {
    private bool _loaderShown;
    private string _statusMessage = string.Empty;

    protected override async Task OnInitializedAsync()
    {
        await base.OnInitializedAsync();
        await Register<ShowLoaderMessage>(HandleShowLoaderMessage);
    }

    private async Task HandleShowLoaderMessage(object subscriber, ShowLoaderMessage message)
    {
        _loaderShown = message.IsShown;
        _statusMessage = message.StatusMessage;
        await InvokeAsync(StateHasChanged);
    }
}