public void DoImport(List <Work> works)
{
using (var dataContext = new SnapDataContext())
{
var subjectList = dataContext.Subjects.ToList();
var domainList = dataContext.Domains.ToList();
var learningObjectiveList = dataContext.LearningObjectives.ToList();
var count = 0;
var progressCount = 0;
var exerciseIDs = works.Select(a_item => a_item.ExerciseID)
.Distinct()
.ToList();
Seeder.ProgressInit(dataContext, Seeder.Exercises, exerciseIDs.Count());
foreach (var exerciseID in exerciseIDs)
{
var exercise = works.First(a_item => a_item.ExerciseID == exerciseID);
var subject = subjectList.SingleOrDefault(a_item => a_item.Name == exercise.Subject);
var domain = domainList.Single(a_item => a_item.Name == exercise.Domain);
var learningObjective =
learningObjectiveList.Single(a_item => a_item.Name == exercise.LearningObjective);
dataContext.Exercises.Add(new Exercise
{
ID = exercise.ExerciseID,
Subject = subject,
Domain = domain,
LearningObjective = learningObjective
});
if (++count == 100)
{
count = 0;
progressCount += 100;
dataContext.SaveChanges();
Seeder.ProgressReport(dataContext, Seeder.Exercises, progressCount);
}
}
dataContext.SaveChanges();
Seeder.ProgressReport(dataContext, Seeder.Exercises, exerciseIDs.Count());
var students = dataContext.Students.ToList();
var exercises = dataContext.Exercises.ToList();
count = 0;
progressCount = 0;
Seeder.ProgressInit(dataContext, Seeder.Answers, works.Count());
foreach (var work in works)
{
var student = students.Single(a_item => a_item.ID == work.UserID);
var exersise = exercises.Single(a_item => a_item.ID == work.ExerciseID);
dataContext.Answers.Add(new Answer
{
ID = work.SubmittedAnswerID,
SubmitDateTime = work.SubmitDateTime,
Correct = work.Correct,
Progress = work.Progress,
Difficulty = work.Difficulty,
Exercise = exersise,
Student = student
});
if (++count == 100)
{
count = 0;
progressCount += 100;
dataContext.SaveChanges();
Seeder.ProgressReport(dataContext, Seeder.Answers, progressCount);
}
}
dataContext.SaveChanges();
Seeder.ProgressReport(dataContext, Seeder.Answers, works.Count());
}
}
protected override void Seed(SnapDataContext dataContext)
{
base.Seed(dataContext);
dataContext.Teachers.Add(new Teacher
{
FirstName = "Tim",
LastName = "Theeuwes",
ProfilePictureLocation = @"teachers/tim.jpg"
});
Seeder.ProgressCreate(dataContext, Seeder.Students);
Seeder.ProgressCreate(dataContext, Seeder.Domains);
Seeder.ProgressCreate(dataContext, Seeder.Subjects);
Seeder.ProgressCreate(dataContext, Seeder.LearningObjectives);
Seeder.ProgressCreate(dataContext, Seeder.Exercises);
Seeder.ProgressCreate(dataContext, Seeder.Answers);
var assembly = Assembly.GetExecutingAssembly();
const string resourceName = "SnapChallenge.Data.Resources.work.csv";
using (var stream = assembly.GetManifestResourceStream(resourceName))
using (var streamReader = new StreamReader(stream))
{
var content = streamReader
.ReadToEnd()
.Split(new char[] { '\r', '\n' }, System.StringSplitOptions.RemoveEmptyEntries);
var works = content
.Skip(1)
.Select(Work.ParseCsvIntoWork)
.ToList();
var studentIDs = works.Select(a_item => a_item.UserID)
.Distinct()
.ToList();
Seeder.ProgressInit(dataContext, Seeder.Students, studentIDs.Count());
foreach (var studentID in studentIDs)
{
var profilePicture = studentID % 10;
dataContext.Students.Add(new Student
{
ID = studentID,
ProfilePictureLocation = $@"profile-pics/{profilePicture}.jpg"
});
}
Seeder.ProgressReport(dataContext, Seeder.Students, studentIDs.Count());
var domains = works.Select(a_item => a_item.Domain)
.Distinct()
.ToList();
Seeder.ProgressInit(dataContext, Seeder.Domains, domains.Count());
foreach (var domain in domains)
{
if (domain == null)
{
continue;
}
dataContext.Domains.Add(new Domain
{
Name = domain
});
}
Seeder.ProgressReport(dataContext, Seeder.Domains, domains.Count());
var subjects = works.Select(a_item => a_item.Subject)
.Distinct()
.ToList();
Seeder.ProgressInit(dataContext, Seeder.Subjects, subjects.Count());
foreach (var subject in subjects)
{
if (subject == null)
{
continue;
}
dataContext.Subjects.Add(new Subject
{
Name = subject
});
}
Seeder.ProgressReport(dataContext, Seeder.Subjects, subjects.Count());
var learningObjectives = works.Select(a_item => a_item.LearningObjective)
.Distinct()
.ToList();
Seeder.ProgressInit(dataContext, Seeder.LearningObjectives, learningObjectives.Count());
foreach (var learningObjective in learningObjectives)
{
if (learningObjective == null)
{
continue;
}
dataContext.LearningObjectives.Add(new LearningObjective
{
Name = learningObjective
});
}
dataContext.SaveChanges();
Seeder.ProgressReport(dataContext, Seeder.LearningObjectives, learningObjectives.Count());
var seederThread = new SeederThread();
var importThread = new Thread(() => seederThread.DoImport(works))
{
IsBackground = true
};
importThread.Start();
}
}
