public async Task <Encouragement> GetRandomEncouragement(Mood mood)
{
var encouragements = await _database.GetEncouragementsForMoodAsync(mood.Id);
if (encouragements.Count == 0)
{
return(new Encouragement
{
Message = "You're great, but the developer of this app made a mistake."
});
}
var randomIndex = _random.Next(0, encouragements.Count);
return(encouragements[randomIndex]);
}
async void InitializePropertiesAsync()
{
var encouragements = await _encouragementDatabase.GetEncouragementsForMoodAsync(Mood.Id);
foreach (var encouragement in encouragements)
{
Encouragements.Add(new EncouragementEditorViewModel(encouragement));
}
// We add the event handler AFTER we load the initial set of encouragements.
Encouragements.CollectionChanged += async(s, e) =>
{
if (e.Action == NotifyCollectionChangedAction.Remove)
{
foreach (var removed in e.OldItems.Cast <EncouragementEditorViewModel>().Select(r => r.Encouragement))
{
await _encouragementDatabase.DeleteEncouragmentAsync(removed);
}
}
};
EncouragementCountLabel = $"This mood has {Encouragements.Count} encouragements";
NotifyPropertyChange(nameof(EncouragementCountLabel));
}