private async void OnSelectedGroupUpdate([CanBeNull] GroupEntity selectedGroup)
{
if (selectedGroup == null)
{
this.StudentGroups.Clear();
return;
}
var groupLessons = await _context.GetGroupLessons(selectedGroup).ToListAsync();
this.SelectedStream = _context.Streams
.Include(model => model.Discipline)
.FirstOrDefault(model => model.Groups.Any(groupModel => groupModel.Id == selectedGroup.Id));
var lessons = (await _context.StudentLessons
.Where(lessonModel => this.Student.Id == lessonModel.Student.Id)
.ToListAsync())
.Where(lessonModel => groupLessons.Any(model => model.Id == lessonModel.Lesson.Id))
.ToArray(); // to init lazy sequence
var studentLessonViewBoxes = lessons
.Where(view => view.Lesson.LessonType < LessonType.Attestation)
.Select(model => new StudentLessonViewBox(model, this, _context))
.ToList();
this.StudentLessons.Clear();
this.StudentLessons.AddRange(studentLessonViewBoxes);
var attestations = 0;
var exams = 0;
var studentAttestationExamViews = lessons.Where(view => view.Lesson.LessonType == LessonType.Attestation)
.Select(model => new StudentAttestationExamView(model, this, ++attestations))
.OrderBy(view => view.StudentLesson.Lesson._Order)
.ToList();
this.StudentAttestations.Clear();
this.StudentAttestations.AddRange(studentAttestationExamViews);
var attestationExamViews = lessons.Where(view => view.Lesson.LessonType == LessonType.Exam)
.Select(model => new StudentAttestationExamView(model, this, ++exams))
.OrderBy(view => view.StudentLesson.Lesson._Order)
.ToList();
this.StudentExams.Clear();
this.StudentExams.AddRange(attestationExamViews);
this.AddExamButtonConfig.IsEnabled = this.StudentExams.Count < 1;
UpdateLessonMark();
UpdateExamMark();
}