public async Task <IActionResult> EditModules(CourseEditModulesViewModel model)
{
if (ModelState.IsValid)
{
try
{
var result = await _coursesRepository.EditModules(model);
if (result)
{
// success
return(RedirectToAction("EditStudents", new { courseId = model.CourseId }));
}
}
catch
{
// error
ModelState.AddModelError(string.Empty, "Невідома помилка");
return(RedirectToAction("EditStudents", new { courseId = model.CourseId }));
}
}
else
{
ModelState.TryAddModelError(string.Empty, "Невідома помилка!");
}
return(View(model));
}
public async Task <IActionResult> EditModules(int courseId)
{
var course = _coursesRepository.GetById(courseId);
var subjectId = course.SubjectId;
var subject = _subjectsRepository.GetById(subjectId);
var modules = _modulesRepository.GetModulesBySubjectId(subjectId);
var model = new CourseEditModulesViewModel
{
CourseId = courseId,
Course = new CourseViewModel
{
CourseId = courseId,
Description = subject.Description,
Start = course.StartDate,
End = course.EndDate,
Subject = subject,
Name = course.Name,
Teacher = new UserViewModel
{
Email = course.Teacher.Email,
FirstName = course.Teacher.FirstName,
LastName = course.Teacher.LastName,
MiddleName = course.Teacher.MiddleName,
},
TeacherId = course.TeacherId,
SubjectId = subjectId
},
SubjectId = subjectId,
};
var modulesInCourses = (await _coursesRepository.GetModules(model.CourseId)).Select(x => x.ModuleId).ToList();
model.Modules = modules.Select(x => new CourseModuleEditViewModel
{
Id = x.ModuleId,
Name = x.Name,
Description = x.Description,
Selected = modulesInCourses.Count == 0 ? true : modulesInCourses.Contains(x.ModuleId)
}).ToList();
return(View(model));
}
public async Task <bool> EditModules(CourseEditModulesViewModel model)
{
var courseId = model.CourseId;
var courseStudents = await GetStudents(courseId);
var notSelectedModules = model.Modules.Where(x => !x.Selected).Select(x => x.Id).ToList();
_context.CourseModule.RemoveRange(await _context.CourseModule.Where(x => notSelectedModules.Contains(x.ModuleId)).ToListAsync());
_context.Mark.RemoveRange(await _context.Mark.Include(x => x.CourseModule).Where(x => x.CourseModule.CourseId == courseId && notSelectedModules.Contains(x.CourseModule.ModuleId)).ToListAsync());
var existedModules = await _context.CourseModule.Where(cm => cm.CourseId == courseId).Select(x => x.ModuleId).ToListAsync();
var newModules = model.Modules.Where(x => x.Selected && !existedModules.Contains(x.Id)).Select(x => x.Id).ToList();
newModules.ForEach(async moduleId =>
{
var cm = new CourseModule
{
CourseId = courseId,
ModuleId = moduleId
};
await _context.CourseModule.AddAsync(cm);
if (courseStudents != null && courseStudents.Count > 0)
{
courseStudents.ForEach(async student =>
{
await _context.Mark.AddAsync(
new Mark
{
StudentId = student.StudentId,
CourseModuleId = cm.CourseModuleId,
}
);
});
}
});
return(await _context.SaveChangesAsync() >= 0);
}
