public async Task <bool> ClassBuyArtifact(int classroomId, int artifactId)
{
var artifact = await _unitOfWork.GenericRepository <Artifact>().GetById(artifactId);
if (artifact == null)
{
throw new ArgumentException("There is no artifact with the given id.");
}
if (artifact.Quantity <= 0 || artifact.Type == ArtifactType.Basic)
{
return(false);
}
var students =
await _unitOfWork.ClassroomRepository.GetClassroomStudentsWithStudentArtifact(classroomId, artifactId);
if (students == null || students.Count == 0)
{
throw new ArgumentException(
"There are no students within the given classroom or the wrong classroom id.");
}
var costPerStudent = artifact.Cost / students.Count;
foreach (var student in students)
{
if (student.Coins >= costPerStudent)
{
student.Coins -= costPerStudent;
if (student.StudentArtifacts != null && student.StudentArtifacts.Count > 0)
{
student.StudentArtifacts.Single().PurchasedQuantity++;
}
else
{
var studentArtifact = new StudentArtifact
{
StudentId = student.Id, ArtifactId = artifactId, PurchasedQuantity = 1
};
student.StudentArtifacts ??= new List <StudentArtifact> {
studentArtifact
};
//We must add the entry manually because EFCore doesn't do it automatically for no reason.
_unitOfWork.LinkingRepository <StudentArtifact>().Add(studentArtifact);
}
}
else
{
return(false);
}
}
artifact.Quantity--;
await _unitOfWork.Save();
return(true);
}
public async Task <StudentArtifact> StudentBuyArtifact(int studentId, int artifactId)
{
var student = await _unitOfWork.GenericRepository <Student>().GetById(studentId);
if (student == null)
{
throw new ArgumentException("There is no student with the given id.");
}
var artifact = await _unitOfWork.GenericRepository <Artifact>().GetById(artifactId);
if (artifact == null)
{
throw new ArgumentException("There is no artifact with the given id.");
}
if (student.Coins < artifact.Cost || artifact.Type == ArtifactType.Extra ||
artifact.Quantity <= 0 && artifact.Quantity != null)
{
return(null);
}
student.Coins -= artifact.Cost;
artifact.Quantity--;
var studentArtifact = await _unitOfWork.LinkingRepository <StudentArtifact>()
.GetByFullKey(studentId, artifactId);
if (studentArtifact != null)
{
studentArtifact.PurchasedQuantity++;
}
else
{
studentArtifact = new StudentArtifact {
StudentId = studentId, ArtifactId = artifactId, PurchasedQuantity = 1
};
student.StudentArtifacts ??= new List <StudentArtifact> {
studentArtifact
};
}
await _unitOfWork.Save();
return(studentArtifact);
}
