rdelrosario

public interface IStartupTask
{
    Task<bool> CanRunAsync();
    Task RunAsync();
}

rdelrosario

 public sealed class User
  {
      public User(string firstName)
      {
          if (firstName == null)
              throw new ArgumentNullException(nameof(firstName), "First name cannot be null.");

          if (firstName.Length == 0)
              throw new ArgumentException("First name cannot be empty.", nameof(firstName));

rdelrosario

namespace UberClone.ViewModels
{
    public class MapPageViewModel : INotifyPropertyChanged
    {
        ...
        public MapPageViewModel()
        {
            var _stateMachine = new StateMachine<XUberState, XUberTrigger>(XUberState.Initial);

            CalculateRouteTrigger = _stateMachine.SetTriggerParameters<GooglePlaceAutoCompletePrediction>(XUberTrigger.CalculateRoute);

rdelrosario

<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" 
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
             x:Class="UberClone.Views.MapPage" >
    <Grid RowSpacing="0"
          x:Name="layout"
          VerticalOptions="FillAndExpand"
          RowDefinitions="Auto, *">
        ...
        <local:SearchContentView IsVisible="false" 

rdelrosario

namespace UberClone.ViewModels
{
    public class MapPageViewModel : INotifyPropertyChanged
    {
        public XUberState State { get; private set; }

        public ICommand FireTriggerCommand { get; }
        
        private readonly StateMachine<XUberState, XUberTrigger> _stateMachine;

rdelrosario

  public class MapPageViewModel : INotifyPropertyChanged
  {
    public MapPageViewModel()
    {
      var _stateMachine = new StateMachine<XUberState, XUberTrigger>(XUberState.Initial);

      _stateMachine.Configure(XUberState.Initial)
          .OnEntry(Initialize)
          .OnExit(() => { Places = new ObservableCollection<GooglePlaceAutoCompletePrediction>(RecentPlaces); })
          .OnActivateAsync(GetActualUserLocation)

rdelrosario

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage
    x:Class="VideoPlayerStateMachine.MainPage"
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:controls="clr-namespace:VideoPlayerStateMachine.Controls"
    xmlns:ios="clr-namespace:Xamarin.Forms.PlatformConfiguration.iOSSpecific;assembly=Xamarin.Forms.Core"
    xmlns:local="clr-namespace:VideoPlayerStateMachine"
    xmlns:viewModels="clr-namespace:VideoPlayerStateMachine.ViewModels"
    BackgroundColor="Black"

rdelrosario

public class MainViewModel : INotifyPropertyChanged
{
    public MainViewModel()
    {
       _videoPlayerStateMachine.Configure(VideoState.Playing)
           .OnActivate(OnStateEntry)
           .OnEntry(OnStateEntry)
           .PermitReentryIf(VideoTrigger.Forward)
           .PermitReentryIf(VideoTrigger.Rewind)
           .Permit(VideoTrigger.Pause, VideoState.Paused)

rdelrosario

public class MainViewModel : INotifyPropertyChanged
{
    public MainViewModel()
    {
      var forwardParamTrigger = _videoPlayerStateMachine.SetTriggerParameters<double>(VideoTrigger.Forward);
      var rewindParamTrigger = _videoPlayerStateMachine.SetTriggerParameters<double>(VideoTrigger.Rewind);
      ...
    }
}

rdelrosario

 public class MainViewModel : INotifyPropertyChanged
    {
       ...
        public ICommand ForwardCommand { get; }

        public ICommand RewindCommand { get; }
        
        public MainViewModel(){
           ...
             ForwardCommand = new Command<double>((seconds) => {