public ExerciseListViewModel(IMasterDetailNavigation navigationService, IMessagingService messagingService, IExercisesRepository exercisesRepository)
{
_navigationService = navigationService;
_messagingService = messagingService;
_exercisesRepository = exercisesRepository;
Title = AppResources.ExercisesTitle;
SelectItemCommand = new Command(async(item) => { await OnItemSelected(item); });
AddExerciseCommand = new Command(async() =>
{
await _navigationService.NavigateToHierarchical <ExerciseDetailsViewModel>();
});
_messagingService.Subscribe <ExerciseDetailsViewModel, Exercise>(this, Messages.ItemAdded, async(sender, e) =>
{
var item = new ExerciseItem
{
Exercise = e,
TrainingDays = await _exercisesRepository.GetTrainingDays(e)
};
Exercises.Add(item);
UpdateVisible();
});
_messagingService.Subscribe <ExerciseDetailsViewModel, Exercise>(this, Messages.ItemChanged, async(sender, e) =>
{
var item = Exercises.FirstOrDefault(x => x.Exercise.ExerciseId == e.ExerciseId);
if (item == null)
{
return;
}
item.Exercise = null;
item.Exercise = e;
item.TrainingDays = await _exercisesRepository.GetTrainingDays(e);
});
_messagingService.Subscribe <ExerciseDetailsViewModel>(this, Messages.ItemDeleted, sender =>
{
var item = Exercises.FirstOrDefault(x => x.Exercise.ExerciseId == sender.ExerciseId);
Exercises.Remove(item);
UpdateVisible();
});
}
private async Task <ObservableCollection <ExerciseItem> > GetExercises()
{
var collection = new ObservableCollection <ExerciseItem>();
var list = await _exercisesRepository.AllAsync();
foreach (var item in list)
{
var vm = new ExerciseItem
{
Exercise = item,
TrainingDays = await _exercisesRepository.GetTrainingDays(item)
};
collection.Add(vm);
}
return(collection);
}