public void UpdateSessionLastAction() {
using (JolTudomEEntities ent = new JolTudomEEntities()) {
ent.Attach(_Session);
_Session.LastAction = DateTime.UtcNow;
ent.SaveChanges();
}
}
public void DeleteSession() {
using (JolTudomEEntities ent = new JolTudomEEntities()) {
ent.Attach(_Session);
ent.Sessions.DeleteObject(_Session);
ent.SaveChanges();
}
}
private void GetSession() {
using (JolTudomEEntities ent = new JolTudomEEntities()) {
_Session = ent.Sessions.FirstOrDefault(s => s.Token == _Token);
if (_Session != null) {
ent.Sessions.Detach(_Session);
}
else {
throw new SessionNotAvailable();
}
}
}
public List<TestDetails> GetTestDetails(string token, int testid, int? personid) {
SessionManager sm = new SessionManager(token);
JolTudomEEntities ent = new JolTudomEEntities();
List<TestDetails> testdet = new List<TestDetails>();
var details = ent.usp_Eval(testid, personid ?? sm.Session.PersonID, sm.Session.PersonID, sm.Session.RoleID);
testdet = details.ToList();
sm.UpdateSessionLastAction();
return testdet;
}
public List<Statistics> GetStatistics(string token, int? personid) {
SessionManager sm = new SessionManager(token);
JolTudomEEntities ent = new JolTudomEEntities();
List<Statistics> statofperson = new List<Statistics>();
var statistics = ent.usp_Statistics(personid ?? sm.Session.PersonID, sm.Session.PersonID, sm.Session.RoleID);
statofperson = statistics.ToList();
sm.UpdateSessionLastAction();
return statofperson;
}
public string Login(string username, string password, out PersonDetails loggedinuser) {
string token = string.Empty;
try {
JolTudomEEntities ent = new JolTudomEEntities();
var loggedin = ent.usp_Authenticate(username, password);
loggedinuser = loggedin.First();
SessionManager sm = SessionManager.NewSession(loggedinuser);
return sm.Session.Token;
}
catch (EntityCommandExecutionException) {
// send only a general error message
throw new Exception("Hibás felhasználónév vagy jelszó!");
}
}
public static SessionManager NewSession(PersonDetails loggedinuser) {
// generate a token
// this could be more secure ...
byte[] time = BitConverter.GetBytes(DateTime.UtcNow.ToBinary());
byte[] key = Guid.NewGuid().ToByteArray();
string token = Convert.ToBase64String(time.Concat(key).ToArray());
using (JolTudomEEntities ent = new JolTudomEEntities()) {
// delete those sessions, which are dead - over of the given timeout
ent.usp_SessionsCleanup(Settings.Default.SessionTimeoutMinute);
// delete those tests, which are not completed
ent.usp_CleanupTests(Settings.Default.MaxTestExecutionHour);
// this must be saved to the database with the timestamp
ent.Sessions.AddObject(new Session { Token = token, PersonID = loggedinuser.PersonID, RoleID = loggedinuser.RoleID, LastAction = DateTime.UtcNow });
ent.SaveChanges();
}
SessionManager sm = new SessionManager(token);
return sm;
}
/// <summary>
/// we must provide the personid here, though in a normal case we could get that from session
/// but if the session is over we don't have that
/// </summary>
/// <param name="token"></param>
/// <param name="testid"></param>
/// <param name="personid"></param>
public void CancelTest(string token, int testid, int personid) {
SessionManager sm;
try {
sm = new SessionManager(token);
}
catch (SessionNotAvailable) {
// this is a special case that in the meantime the session is timed out
// but the started test must be cancelled
using (JolTudomEEntities ents = new JolTudomEEntities()) {
ents.usp_CancelTest(testid, personid);
}
// and throw the exception to the client
throw;
}
JolTudomEEntities ent = new JolTudomEEntities();
try {
ent.usp_CancelTest(testid, personid);
sm.UpdateSessionLastAction();
}
catch (EntityCommandExecutionException ece_exc) {
throw ece_exc.InnerException;
}
}
public List<Courses> GetCourses(string token) {
SessionManager sm = new SessionManager(token);
List<Courses> courselist = new List<Courses>();
JolTudomEEntities ent = new JolTudomEEntities();
try {
var courses = ent.usp_GetCourses();
courselist = courses.ToList();
sm.UpdateSessionLastAction();
}
catch (EntityCommandExecutionException ece_exc) {
throw ece_exc.InnerException;
}
return courselist;
}
public void EditTopic(string token, int courseid, int topicid, string name, string description) {
SessionManager sm = new SessionManager(token);
JolTudomEEntities ent = new JolTudomEEntities();
try {
ent.usp_EditTopic(name, description, topicid, courseid);
sm.UpdateSessionLastAction();
}
catch (EntityCommandExecutionException ece_exc) {
throw ece_exc.InnerException;
}
}
public void AddNewCourse(string token, string name, string description) {
SessionManager sm = new SessionManager(token);
JolTudomEEntities ent = new JolTudomEEntities();
try {
ent.usp_AddNewCourse(name, description);
sm.UpdateSessionLastAction();
}
catch (EntityCommandExecutionException ece_exc) {
throw ece_exc.InnerException;
}
}
public List<PersonDetails> GetUsers(string token, int? searchroleid) {
SessionManager sm = new SessionManager(token);
JolTudomEEntities ent = new JolTudomEEntities();
List<PersonDetails> plist = new List<PersonDetails>();
try {
var persons = ent.usp_GetAllUsers(sm.Session.RoleID, searchroleid ?? null);
plist = persons.ToList();
sm.UpdateSessionLastAction();
}
catch (EntityCommandExecutionException ece_exc) {
throw ece_exc.InnerException;
}
return plist;
}
public void NewUser(string token, string username, string prefix, string lastname, string middlename, string firstname, string password, int roleid) {
JolTudomERoles newuserrole = (JolTudomERoles)roleid;
// if token is available, it means only administrator can create a new user
if (!string.IsNullOrEmpty(token)) {
SessionManager sm = new SessionManager(token);
if (sm.Session.UserRole != JolTudomERoles.Admin) {
throw new ApplicationException("Csak Adminisztrátor hozhat létre új felhasználót!");
}
}
// if token is null, it means the new user will be student
else {
// force roleid to be a Student
newuserrole = JolTudomERoles.Student;
}
// the rest of the validation will be performed in backend
JolTudomEEntities ent = new JolTudomEEntities();
try {
ent.usp_AddNewUser(username, prefix, lastname, middlename, firstname, password, (byte)newuserrole);
}
catch (EntityCommandExecutionException ece_exc) {
throw ece_exc.InnerException;
}
}
public List<Topics> GetTopics(string token, int courseid) {
SessionManager sm = new SessionManager(token);
List<Topics> topiclist = new List<Topics>();
JolTudomEEntities ent = new JolTudomEEntities();
try {
var topics = ent.usp_GetTopics(courseid);
topiclist = topics.ToList();
sm.UpdateSessionLastAction();
}
catch (EntityCommandExecutionException ece_exc) {
throw ece_exc.InnerException;
}
return topiclist;
}
