BaseOnboardingStepViewModel.cs

using System.Threading.Tasks;
using CommunityToolkit.Mvvm.Input;
 
namespace NeuroAccessMaui.UI.Pages.Onboarding.ViewModels
{
    public abstract partial class BaseOnboardingStepViewModel : BaseViewModel
    {
        private static readonly AsyncRelayCommand disabledAsyncCommand = new(async () => await Task.CompletedTask);
 
        protected BaseOnboardingStepViewModel(OnboardingStep step)
        {
            this.Step = step;
        }
 
        internal void AttachCoordinator(OnboardingViewModel coordinator)
        {
            this.Coordinator = coordinator;
            this.OnPropertyChanged(nameof(this.NextCommand));
            this.OnPropertyChanged(nameof(this.BackCommand));
            this.OnPropertyChanged(nameof(this.GoToStepCommand));
            this.OnPropertyChanged(nameof(this.CoordinatorViewModel));
        }
 
        public OnboardingStep Step { get; }
 
        protected OnboardingViewModel Coordinator { get; private set; } = null!;
 
        public OnboardingViewModel? CoordinatorViewModel => this.Coordinator;
 
        public IAsyncRelayCommand NextCommand => this.Coordinator?.GoToNextCommand ?? disabledAsyncCommand;
 
        public IAsyncRelayCommand BackCommand => this.Coordinator?.GoBackCommand ?? disabledAsyncCommand;
 
        public IAsyncRelayCommand<OnboardingStep> GoToStepCommand => this.Coordinator?.GoToStepCommand ?? new AsyncRelayCommand<OnboardingStep>(_ => Task.CompletedTask);
 
        public virtual string Title => this.Step.ToString();
 
        public virtual string Description => string.Empty;
 
        public virtual string NextButtonText => "Continue";
 
        public virtual string BackButtonText => "Back";
 
        internal virtual Task<bool> OnNextAsync()
        {
            return Task.FromResult(true);
        }
 
        internal virtual Task OnActivatedAsync()
        {
            return Task.CompletedTask;
        }
 
        internal virtual Task OnBackAsync()
        {
            return Task.CompletedTask;
        }
    }
}