public WeatherStationViewModel(AppViewModel screen, Core.Locations.Location location, IWeatherService service, IHealthService healthService)
{
this.HostScreen = screen;
this.service = service;
this.location = location;
#if DEBUG
if ((bool)(DesignerProperties.IsInDesignModeProperty.GetMetadata(typeof(DependencyObject)).DefaultValue))
{
}
else
{
#endif
this.refreshTodaysWeather = ReactiveCommand.CreateFromTask(async() => await service.GetTodaysWeatherAsync(location));
this.todaysWeatherProperty = this.refreshTodaysWeather.Select(weather => new TodaysForecastModel(weather, screen, service)).ToProperty(this, vm => vm.Today);
this.forecastCommand = ReactiveCommand.CreateFromTask(async() =>
{
var forecasts = await service.GetWeatherForecastAsync(location);
return(forecasts.Select(f => new DayForecastModel(f, screen, service)));
});
this.forecasts = this.forecastCommand.ToProperty(this, vm => vm.Forecasts);
var refreshConditionsAffectedByWeatherCommand = ReactiveCommand.CreateFromTask(async(TodaysForecast weather) =>
{
var conditions = await healthService.GetConditionsAffectedByWeatherAsync(weather.WeatherCode, weather.Temperature);
return(conditions.Select(c => new ConditionViewModel(screen, c.Id, c.Name, healthService)));
});
this.conditionsAffectedByWeatherProperty = refreshConditionsAffectedByWeatherCommand.ToProperty(this, vm => vm.ConditionsAffectedByWeather);
this.refreshTodaysWeather.InvokeCommand(refreshConditionsAffectedByWeatherCommand);
//Create a busy property to show the user we're busy doing something.
Observable
.CombineLatest(this.refreshTodaysWeather.IsExecuting, this.forecastCommand.IsExecuting, refreshConditionsAffectedByWeatherCommand.IsExecuting, (today, forecast, conditions) => today || forecast || conditions)
.ToProperty(this, vm => vm.IsBusy, out this.isBusy);
this.hasConditions = this.WhenAnyValue(vm => vm.ConditionsAffectedByWeather).Select(items => items != null && items.Count() > 0).ToProperty(this, vm => vm.HasConditionsAffectedByWeather);
this.WhenNavigatedTo(() => Task.Run(async() =>
{
await this.refreshTodaysWeather.Execute();
await this.forecastCommand.Execute();
}));
#if DEBUG
}
#endif
}