//TODO: This method looks good, but I would say it should be in DAL. What do you think?
public Task <int> InsertEntity(IEntity entity)
{
if (entity is Language)
{
return(Db.SqLiteAsyncConnection.InsertAsync(entity));
}
else if (entity is Level)
{
return(SelectedLanguage.InsertLevel(entity as Level));
}
else if (entity is Unit)
{
return(selectedLevel.InsertUnit(entity as Unit));
}
else if (entity is Lesson)
{
return(SelectedUnit.InsertLesson(entity as Lesson));
}
return(new Task <int>(() => 0));
}