private static CourseListViewModel CreateViewModel(
ICourseUpdater courseUpdater = null,
ICourseRepository repository = null,
IPreferencesUtility preferences = null,
IDateTimeUtility dateTime = null,
IDbConnection dbConnection = null,
ISecureStorageUtility secureStorage = null,
IBackgroundSyncUtility backgroundSync = null,
IMessenger messenger = null
)
{
if (courseUpdater == null)
{
courseUpdater = Substitute.For <ICourseUpdater>();
courseUpdater.TryUpdateAsync().Returns(
Task.FromResult(Result.WithSuccess(new CourseUpdateInfo(true)))
);
}
if (repository == null)
{
repository = Substitute.For <ICourseRepository>();
repository.All().Returns(new Course[0]);
}
var utcNow = DateTime.UtcNow;
if (dateTime == null)
{
dateTime = Substitute.For <IDateTimeUtility>();
dateTime.UtcNow.Returns(utcNow);
}
if (preferences == null)
{
preferences = Substitute.For <IPreferencesUtility>();
preferences.LastCourseUpdateCheck.CompareTo(utcNow.AddMinutes(-30));
}
dbConnection = dbConnection ?? Substitute.For <IDbConnection>();
secureStorage = secureStorage ?? Substitute.For <ISecureStorageUtility>();
backgroundSync = backgroundSync ?? Substitute.For <IBackgroundSyncUtility>();
messenger = messenger ?? Substitute.For <IMessenger>();
return(new CourseListViewModel(
courseUpdater,
repository,
preferences,
dateTime,
dbConnection,
secureStorage,
backgroundSync,
messenger
));
}
private async Task <Result> TryUpdateCoursesAsync()
{
var updateDateTime = _dateTime.UtcNow;
var courseUpdateResult = await _courseUpdater.TryUpdateAsync().ConfigureAwait(false);
if (!courseUpdateResult.IsSuccessful)
{
ErrorMessage = courseUpdateResult.ErrorMessage;
State = CourseListState.Error;
return(courseUpdateResult);
}
_preferences.LastCourseUpdateCheck = updateDateTime;
return(Result.Success);
}