DelegateCommand wrapper

BaseCommand.cs

public class BaseCommand : DelegateCommand
{
    public double InvocationDelayInSeconds { get; set; }

    private DateTime lastInvokeTime = DateTime.MinValue;

    private readonly Func<bool> canExecute;

    public BaseCommand(
        Action executeAction,
        double invocationDelayInSeconds = 1)
        : base(executeAction)
    {
        InvocationDelayInSeconds = invocationDelayInSeconds;
    }

    public BaseCommand(
        Action executeAction,
        Func<bool> canExecute,
        double invocationDelayInSeconds = 1)
        : base(executeAction, canExecute)
    {
        this.canExecute = canExecute;
        InvocationDelayInSeconds = invocationDelayInSeconds;
    }

    protected override void Execute(object parameter)
    {
        if (DateTime.Now - lastInvokeTime < TimeSpan.FromSeconds(InvocationDelayInSeconds))
            return;

        if (IsActive || (canExecute != null && !canExecute()))
            return;

        IsActive = true;
        base.Execute(parameter);
        IsActive = false;

        lastInvokeTime = DateTime.Now;
    }

    protected override void OnIsActiveChanged()
    {
        base.OnIsActiveChanged();
        RaiseCanExecuteChanged();
    }

    protected override bool CanExecute(object parameter)
    {
        return !IsActive;
    }
}