protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
base.OnNavigatingFrom(e);
LocationService.PositionChanged -= LoadNearestStations;
if (nearestLazyBlock != null)
{
nearestLazyBlock.Cancel();
}
}
private void Load(bool refresh)
{
if (lecturesLazyBlock != null)
{
lecturesLazyBlock.Cancel();
lecturesLazyBlock = null;
}
var course = App.Crawler.GetCourse(courseId);
if (!course.Active)
{
if (course.HasFinished)
{
messageTextBlock.Text = "Lectures no longer available";
}
else
{
messageTextBlock.Text = "Lectures not available yet";
}
}
else
{
if (refresh)
{
course = App.Crawler.RefreshCourse(course.Id);
}
lecturesLazyBlock = new LazyBlock <LectureSection[]>(
"lectures",
"No lectures available. Make sure you have accepted the honor code.",
course.LectureSections,
a => a.Length == 0,
new LazyBlockUI <LectureSection[]>(
this,
lectureSections => pivot.ItemsSource = lectureSections,
() => pivot.ItemsSource != null,
messageTextBlock),
false,
null,
success =>
{
if (!success)
{
ErrorReporting.Log("Failed to get lectures");
}
},
null);
}
}
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
base.OnNavigatingFrom(e);
if (coursesLazyBlock != null)
{
coursesLazyBlock.Cancel();
}
}
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
base.OnNavigatingFrom(e);
if (lecturesLazyBlock != null)
{
lecturesLazyBlock.Cancel();
}
if (videoLazyBlock != null)
{
videoLazyBlock.Cancel();
}
}
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
base.OnNavigatingFrom(e);
if (e.NavigationMode == NavigationMode.New && e.Uri.OriginalString == "app://external/")
{
//running in background
return;
}
if (journeyElementsLazyBlock != null)
{
journeyElementsLazyBlock.Cancel();
}
}
private void LoadCourses(string email, string password, bool refresh)
{
if (App.Crawler == null)
{
App.Crawler = new Crawler(email, password, Cache.GetFiles(), Cache.SaveFile, DownloadInfo.Create);
}
if (refresh)
{
App.Crawler.RefreshCourses();
}
if (coursesLazyBlock != null)
{
coursesLazyBlock.Cancel();
}
coursesLazyBlock = new LazyBlock <Course[]>(
"courses",
null,
App.Crawler.Courses,
_ => false,
new LazyBlockUI <Course[]>(
this,
courses =>
{
var active = new List <Course>();
var upcoming = new List <Course>();
var finished = new List <Course>();
foreach (var course in courses)
{
if (course.HasFinished)
{
finished.Add(course);
}
else if (course.Active)
{
active.Add(course);
}
else
{
upcoming.Add(course);
}
}
activeCourses.ItemsSource = active;
upcomingCourses.ItemsSource = upcoming;
finishedCourses.ItemsSource = finished;
activeCoursesCourseCatalogButton.Visibility = activeCoursesEmptyMessage.Visibility = active.Count == 0 ? Visibility.Visible : Visibility.Collapsed;
upcomingCoursesCourseCatalogButton.Visibility = upcomingCoursesEmptyMessage.Visibility = upcoming.Count == 0 ? Visibility.Visible : Visibility.Collapsed;
finishedCoursesEmptyMessage.Visibility = finished.Count == 0 ? Visibility.Visible : Visibility.Collapsed;
if (active.Count == 0)
{
if (upcoming.Count == 0)
{
pivot.SelectedIndex = 2;
}
else
{
pivot.SelectedIndex = 1;
}
}
},
() => activeCourses.ItemsSource != null,
messageTextBlock),
false,
_ =>
{
activeCoursesEmptyMessage.Visibility = Visibility.Collapsed;
upcomingCoursesEmptyMessage.Visibility = Visibility.Collapsed;
finishedCoursesEmptyMessage.Visibility = Visibility.Collapsed;
},
success =>
{
if (!success)
{
ErrorReporting.Log("Failed to get courses");
}
},
null);
}