void EducationSystemDataModel::addInstructor(int id, string password, string firstName, string lastName)
{
// Check for duplicate id
if(isUserExists(id)){
cout << "This user already exists" << endl;
return;
}
// Add new student
users.push_back(UserModel(id, password, firstName, lastName, 2));
}
UserModel EducationSystemDataModel::getUserByCredentials(int id, string password, bool &exist)
{
// Assume we don't have such user
exist = false;
// Iterate through users list and check for match
list<UserModel>::iterator userItem;
for(userItem = users.begin(); userItem != users.end(); userItem++){
UserModel user = *userItem;
if(user.getId() == id && user.getPassword() == password){
// Match found
exist = true;
return user;
}
}
return UserModel();
}
// GetStepOverall {{{
int ModelUpdater::GetStepOverall(long WORKER, long WORKERNUM, long STEP,
int stepno, map<USERID,UserModel>& models)
{
char* fname = "/data/xce/friendranknew/data/passport.list";
long filesize = get_filesize(fname);
assert(filesize % sizeof(int) == 0);
long usersize = filesize / sizeof(int);
long stepsize = (long)ceil((double)usersize / WORKERNUM); // by user
long worker_begin = (WORKER * stepsize) * sizeof(int);
long worker_end = worker_begin + stepsize * sizeof(int); // [worker_begin,worker_end)
if (worker_end>filesize)
worker_end = filesize;
assert((worker_end-worker_begin) % sizeof(int) == 0);
long begin = worker_begin + (stepno * STEP) * sizeof(int);
if (begin>=worker_end)
return -1;
long end = begin + STEP * sizeof(int);
if (end>=worker_end)
end = worker_end;
assert((end-begin) % sizeof(int) == 0);
int* idlist = new int[STEP];
FILE* fp = fopen(fname, "rb");
assert(fp!=NULL);
fseek(fp, begin, SEEK_SET);
int idnum = fread(idlist, sizeof(int), /*STEP*/(end-begin)/sizeof(int), fp);
fclose(fp);
for (int i=0; i<idnum; ++i)
{
models.insert(make_pair<USERID,UserModel>(idlist[i], UserModel(idlist[i])));
}
delete[] idlist;
return 0;
}// }}}
// GetStepInterval {{{
int ModelUpdater::GetStepInterval(long WORKER, long WORKERNUM, long STEP,
int stepno, map<USERID,UserModel>& models)
{
long begin = ((stepno * WORKERNUM + WORKER) * STEP) * sizeof(int);
char* fname = "/data/xce/friendranknew/data/passport.list";
long filesize = get_filesize(fname);
if (begin>filesize)
return -1;
int* idlist = new int[STEP];
FILE* fp = fopen(fname, "rb");
assert(fp!=NULL);
fseek(fp, begin, SEEK_SET);
int idnum = fread(idlist, sizeof(int), STEP, fp);
fclose(fp);
for (int i=0; i<idnum; ++i)
{
models.insert(make_pair<USERID,UserModel>(idlist[i], UserModel(idlist[i])));
}
delete[] idlist;
return 0;
}// }}}
void MainWindow::login()
{
Login login;
bool loggedIn = false;
while (!loggedIn)
{
if (login.exec() == QDialog::Accepted)
{
loggedIn = login.createUserOrLogin();
if (!loggedIn)
{
QMessageBox::critical(NULL, "Could not log in", "Error logging in, please try again");
}
}
else
{
exit(0);
}
}
mUser = UserModel(login.userName());
ui->lblUsername->setText(mUser.username());
updateShoppingCart();
}
void EducationSystemDataModel::loadFromFiles()
{
// =======================================
// Reading users from file
// =======================================
ifstream usersFile(USERS_FILE);
string userItem;
while(getline(usersFile, userItem)){
vector<string> fields = Utils::split(userItem, FIELD_DELIM);
// User ID
int id = stoi(fields[0]);
// Password
string password = fields[1];
// First Name
string firstName = fields[2];
// Last Name
string lastName = fields[3];
// status (type of user)
int status = stoi(fields[4]);
// Add to list
users.push_back(UserModel(id, password, firstName, lastName, status));
}
usersFile.close();
// =======================================
// Reading courses from file
// =======================================
ifstream coursesFile(COURSES_FILE);
string courseItem;
while(getline(coursesFile, courseItem)){
vector<string> fields = Utils::split(courseItem, FIELD_DELIM);
// Course ID
int id = stoi(fields[0]);
// Name
string name = fields[1];
// Instructor ID
int instructorId = stoi(fields[2]);
// Add to list
courses.push_back(CourseModel(id, name, instructorId));
}
coursesFile.close();
// =======================================
// Reading takes from file
// =======================================
ifstream takesFile(TAKES_FILE);
string takeItem;
while(getline(takesFile, takeItem)){
vector<string> fields = Utils::split(takeItem, FIELD_DELIM);
// Course ID
int courseId = stoi(fields[0]);
// Instructor ID
int instructorId = stoi(fields[1]);
// Student ID
int studentId = stoi(fields[2]);
// Grade
float grade = stof(fields[3]);
// Add to list
takes.push_back(TakeModel(courseId, instructorId, studentId, grade));
}
takesFile.close();
}
