ersatztv/ErsatzTV/Shared/CopyWatermarkDialog.razor

@using ErsatzTV.Application.Watermarks
@using ErsatzTV.Application.Watermarks.Commands
@using System.Threading
@implements IDisposable
@inject IMediator _mediator
@inject ISnackbar _snackbar
@inject ILogger<CopyWatermarkDialog> _logger

<MudDialog>
    <DialogContent>
        <EditForm Model="@_dummyModel" OnSubmit="@(_ => Submit())">
            <MudContainer Class="mb-6">
                <MudText>
                    Enter a name for the new Watermark
                </MudText>
            </MudContainer>
            <MudTextField T="string" Label="New Watermark Name"
                          @bind-Text="@_newWatermarkName"
                          Class="mb-6 mx-4">
            </MudTextField>
        </EditForm>
    </DialogContent>
    <DialogActions>
        <MudButton OnClick="Cancel" ButtonType="ButtonType.Reset">Cancel</MudButton>
        <MudButton Color="Color.Primary" Variant="Variant.Filled" OnClick="Submit">
            Copy Watermark
        </MudButton>
    </DialogActions>
</MudDialog>

@code {
    private readonly CancellationTokenSource _cts = new();

    [CascadingParameter]
    MudDialogInstance MudDialog { get; set; }

    [Parameter]
    public int WatermarkId { get; set; }

    private record DummyModel;

    private readonly DummyModel _dummyModel = new();

    private string _newWatermarkName;
    
    public void Dispose()
    {
        _cts.Cancel();
        _cts.Dispose();
    }

    private bool CanSubmit() => !string.IsNullOrWhiteSpace(_newWatermarkName);

    private async Task Submit()
    {
        if (!CanSubmit())
        {
            return;
        }

        Either<BaseError, WatermarkViewModel> maybeResult =
            await _mediator.Send(new CopyWatermark(WatermarkId, _newWatermarkName), _cts.Token);

        maybeResult.Match(
            watermark => { MudDialog.Close(DialogResult.Ok(watermark)); },
            error =>
            {
                _snackbar.Add(error.Value, Severity.Error);
                _logger.LogError("Error copying Watermark: {Error}", error.Value);
                MudDialog.Close(DialogResult.Cancel());
            });
    }

    private void Cancel(MouseEventArgs e) => MudDialog.Cancel();
}