public AnswerViewModel(ExamTask sourseTask, int gotPoints)
{
task_id = sourseTask.Id;
right_answer = sourseTask.Answer;
max_points = sourseTask.TaskTopic.PointsPerTask;
type = sourseTask.TaskTopic.IsShort ? 0 : 1;
points = gotPoints;
}
public ExamTaskViewModel(ExamTask sourseTask, int?user_points = null)
{
id = sourseTask.Id;
text = sourseTask.Text;
topic_id = sourseTask.TaskTopic.Id;
topic_name = sourseTask.TaskTopic.Name;
type = sourseTask.TaskTopic.IsShort ? 0 : 1;
code = sourseTask.TaskTopic.Code;
max_points = sourseTask.TaskTopic.PointsPerTask;
this.user_points = user_points;
}
private UserTaskAttempt GenerateNewEmptyAttempt(ExamTask task)
{
UserTaskAttempt result = null;
if (task.TaskTopic.IsShort)
{
result = new UserSimpleTaskAttempt()
{
ExamTask = task
};
}
else
{
result = new UserManualCheckingTaskAttempt()
{
ExamTask = task
};
}
if (result != null)
{
//_dbContext.UserTaskAttempts.Add(result);
}
return(result);
}
public async Task AddNewTasks(ExamAppDbContext examAppDbContext)
{
var exam = examAppDbContext.Exams.OfType <EgeExam>().FirstOrDefault();
var existingTopics = examAppDbContext.TaskTopics.ToList();
var existingTasks = examAppDbContext.Tasks.ToList();
var createdTasksTopics = new List <TaskTopic>();
var createdTasks = new List <ExamTask>();
var config = Configuration.Default.WithDefaultLoader();
const int numberOfVariants = 20;
for (int i = 1; i <= numberOfVariants; i++)
{
var address = "http://kpolyakov.spb.ru/school/ege/gen.php?B=on&C=on&action=viewVar&varId=" + i;
var document = await BrowsingContext.New(config).OpenAsync(address).ConfigureAwait(false);
var cellSelector = "td.topicview script";
var cells = document.QuerySelectorAll(cellSelector);
const string numberPrefix = "№ ";
const string textPrexfix = "changeImageFilePath('";
foreach (var cell in cells)
{
var result = cell.TextContent;
var firstOrDefault =
cell.ParentElement.ParentElement.QuerySelectorAll("td.egeno span").FirstOrDefault();
if (firstOrDefault != null)
{
int orderNum =
int.Parse(firstOrDefault.TextContent);
int numStartPoint = result.IndexOf(numberPrefix) + numberPrefix.Length;
int textStartPoint = result.IndexOf(textPrexfix) + textPrexfix.Length;
if (existingTopics.All(x => x.Number != orderNum))
{
var newTopic = new TaskTopic()
{
Exam = exam,
Name = "DefaultName" + orderNum,
Number = orderNum,
PointsPerTask = 0
};
createdTasksTopics.Add(newTopic);
existingTopics.Add(newTopic);
}
var topic = existingTopics.FirstOrDefault(x => x.Number == orderNum);
var number = int.Parse(result.Substring(numStartPoint, result.IndexOf(")") - numStartPoint));
if (!existingTasks.Any(x => x.Number == number))
{
var newTask = new ExamTask()
{
TaskTopic = topic,
Number = number,
Text = result.Substring(textStartPoint, result.LastIndexOf("\') );") - textStartPoint),
Answer = document
.QuerySelectorAll("table.varanswer tr td.egeno")
.Where(
x => int.Parse(x.TextContent.Substring(0, x.TextContent.Length - 1)) == orderNum)
.Next("td.answer")
.FirstOrDefault()?.TextContent
};
createdTasks.Add(newTask);
existingTasks.Add(newTask);
}
}
}
}
examAppDbContext.TaskTopics.AddRange(createdTasksTopics);
examAppDbContext.Tasks.AddRange(createdTasks);
CreateEgeTasksTopics(examAppDbContext, existingTopics);
examAppDbContext.SaveChanges();
}
private bool RatedAnswerIsCorrect(ExamTask task, UserTaskAttempt attempt)
{
return(task.TaskTopic.PointsPerTask == attempt.Points);
}
private Task CreateNewTask(string type, string title, string description, Priority priority, DateTime due)
{
if (title.Length < 3)
{
Toastr.Warning("Warning", "Title length is too short");
return(null);
}
if (description.Length < 10)
{
Toastr.Warning("Warning", "Description length is too short.");
return(null);
}
if (!DateService.DateAfterToday(due))
{
Toastr.Warning("Warning", "The due date must be in the future.");
return(null);
}
Task newTask = null;
Toastr.TurnOffNotifications(); // Prevent multiple 'update' notifications
DateTime now = DateTime.Now;
switch (type)
{
case "Assignment":
string subject = tbxSubject.Text;
int percentage = int.Parse(tbxPercentage.Text);
newTask = new AssignmentTask(title, description, priority, due, now, subject, percentage);
break;
case "Exam":
string subjectExam = tbxSubjectExam.Text;
string materials = tbxMaterials.Text;
int percentageExam = int.Parse(tbxPercentExam.Text);
newTask = new ExamTask(title, description, priority, due, now, subjectExam, percentageExam, new List <string>(materials.Split(',')));
break;
case "Event":
string location = tbxLocation.Text;
newTask = new EventTask(title, description, priority, due, now, location);
break;
case "Payment":
decimal amount = decimal.Parse(tbxAmount.Text);
newTask = new PaymentTask(title, description, priority, due, now, amount);
break;
default:
Toastr.Error("Error", "Invalid task type.");
break;
}
Toastr.TurnOnNotifications();
if (newTask != null)
{
Toastr.Success("Created", "The '" + title + "' task has been created");
}
return(newTask);
}
