public async Task RemoveStudentCourseGradeAsync(int gradeId, int teacherId)
{
var grade = await _gradesUnitOfWork.Repository.GetByIdAsync(gradeId).ConfigureAwait(false);
if (grade == null)
{
throw new ResourceNotFoundException($"Оцінка {gradeId} не знайдена");
}
var finalGrade = await GetStudentSubjectFinalGradeAsync(grade.StudentRefId, grade.Gradebook.SemesterRefId)
.ConfigureAwait(false);
if (finalGrade != null)
{
throw new ResourceOperationException($"Студент {grade.Student.Account.LastName} {grade.Student.Account.FirstName} ({grade.StudentRefId}) вже має кінцеву оцінку по предмету {grade.Gradebook.Subject.Name}");
}
var gradebook = await _gradebooksService.GetGradebookAsync(grade.GradebookRefId)
.ConfigureAwait(false);
if (gradebook == null)
{
throw new ResourceNotFoundException($"Журнал {grade.GradebookRefId} не знайдено");
}
if (gradebook.Teachers.All(t => t.Id != teacherId))
{
throw new ResourceAccessPermissionException($"Викладач {teacherId} не має доступу до журналу {gradebook.Id}");
}
_gradesUnitOfWork.Repository.Delete(grade);
await _gradesUnitOfWork.SaveChangesAsync().ConfigureAwait(false);
}
public async Task DeleteSubjectFromSemester(int subjectId, int groupId, int yearNumber, int semesterNumber)
{
var group = await _groupsService.GetGroupAsync(groupId).ConfigureAwait(false);
if (group == null)
{
throw new ResourceNotFoundException($"Група {groupId} не знайдена");
}
var semester = await _groupSemestersService.GetGroupSemesterAsync(groupId, yearNumber, semesterNumber)
.ConfigureAwait(false);
if (semester == null)
{
throw new ResourceNotFoundException($"Семестр {yearNumber}/{semesterNumber} для групи {group.Code} не знайдений");
}
var semesterSubject = (await _semesterScheduleUnitOfWork.Repository
.GetAllAsync(s => s.SemesterRefId == semester.Id && s.SubjectRefId == subjectId)
.ConfigureAwait(false)).FirstOrDefault();
if (semesterSubject == null)
{
throw new ResourceNotFoundException($"Предмет {subjectId} у семестрі {semester.Id} не знайдено");
}
using (var transaction = await _semesterScheduleUnitOfWork.BeginTransactionAsync().ConfigureAwait(false))
{
var gradebook = await _gradebooksService.GetGradebookAsync(semester.Id, subjectId).ConfigureAwait(false);
await _gradebooksService.RemoveGradebookAsync(gradebook.Id);
_semesterScheduleUnitOfWork.Repository.Delete(semesterSubject);
await _semesterScheduleUnitOfWork.SaveChangesAsync().ConfigureAwait(false);
transaction.Commit();
}
}