/*
'Continue' button click
*/
private void jButton3ActionPerformed(
java.awt.event.ActionEvent evt) { // GEN-FIRST:event_jButton3ActionPerformed
// DataType_course courseObj = new DataType_course();
// Get the information about the course and populate courseObj
String courseIDSelected =
jComboBox1.getSelectedItem().toString(); // get the courseID of the course in the comboBox
DataType_courseAction courseActionObj = new DataType_courseAction(courseIDSelected);
// courseActionObj.courseObj = courseObj;
courseActionObj.userObj = userObj;
String subjectName = jComboBox1.getSelectedItem().toString();
Student_CourseActions obj = new Student_CourseActions(courseActionObj);
sendNotification(courseActionObj);
obj.setVisible(true);
this.dispose();
} // GEN-LAST:event_jButton3ActionPerformed
// Function that check if notifications have to be send
public void sendNotification(DataType_courseAction courseActionObj) {
// get the current date from the database
Date currentDate;
Date futurDate;
int hoursBeforeNotification =
24; // students will receive notifications 24h before the end_date of an assignment
String query = "SELECT SYSDATE FROM DUAL";
System.out.println("query to get date from server : " + query);
try {
rs = stmt.executeQuery(query);
rs.next();
currentDate = rs.getTimestamp("sysdate");
// Get the date 24h later
Calendar cal = Calendar.getInstance(); // creates calendar
cal.setTime(new Date()); // sets calendar time/date
cal.add(Calendar.HOUR_OF_DAY, hoursBeforeNotification); // adds hourseforeNotifications
futurDate = cal.getTime();
// get all the data related to the homeworks in the course
query =
"SELECT * from assignment a where a.course_id = '" + courseActionObj.getCourseID() + "'";
System.out.println(
"query get all the homeworks in the course "
+ courseActionObj.getCourseID()
+ " : "
+ query);
try {
rs = stmt.executeQuery(query);
while (rs.next()) { // treat each homework
Date assignmentEndDate = rs.getDate("end_dt");
String assignmentID = rs.getString("assignment_id");
if (futurDate.after(
assignmentEndDate)) { // the due date of this assignment is in less than 24h
// Check if the user has make at least one attempt in this assignment
query =
"SELECT COUNT(*) from attempt a where a.assignment_id = '"
+ assignmentID
+ "' and a.student_id='"
+ courseActionObj.userObj.getUser_id()
+ "'";
System.out.println(
"query get the number of attempts of the assignments "
+ assignmentID
+ " by the user "
+ courseActionObj.userObj.getUser_id()
+ " : "
+ query);
try {
rs = stmt.executeQuery(query);
rs.next();
int numberOfAttempt = rs.getInt("COUNT(*)");
System.out.println("number Of attempt :" + numberOfAttempt);
if (numberOfAttempt == 0) { // the user did make any attempt
// creation of a notification
String message =
"WARNING : You have an assignment in "
+ courseActionObj.getCourseID()
+ " in less than 24h.";
new DataType_notification(
courseActionObj.userObj.user_id, courseActionObj.getCourseID(), message);
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Notification - sendNotification() -get the number of attempts of the assignments "
+ assignmentID
+ " by the user "
+ courseActionObj.userObj.getUser_id()
+ " : "
+ oops);
}
}
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Notification - sendNotification() -get all data related to the homeworks in the class "
+ courseActionObj.getCourseID()
+ " : "
+ oops);
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - sendNotification() - get current date : " + oops);
}
}
/*
This button will check for token and will sign up the student for perticular course if all conditions are met.
*/
private void jButton5ActionPerformed(
java.awt.event.ActionEvent evt) { // GEN-FIRST:event_jButton5ActionPerformed
boolean isATA = false;
// Check if the token is valid
String token = jTextField1.getText();
String query = "SELECT * from token t where t.token_id = '" + token + "'";
System.out.println("query to check existance of the token " + token + " : " + query);
try {
rs = stmt.executeQuery(query);
if (!rs.next()) { // rs return nothing - the token doesn't exist
System.out.println("The Token " + token + " is not recorded in our Database.");
// Warning message
jLabel3.setVisible(true);
jLabel3.setText("This token doesn't exist.");
jLabel3.setForeground(Color.red);
} else {
// Add student in the course
// get the course_id and date of expirancy of the token of the course related to the token
String courseID = rs.getString("course_id");
Date tokenDate = rs.getTimestamp("token_exp_dt");
// check if the expiration date of the token hasn't been crossed
query = "SELECT SYSDATE FROM DUAL";
System.out.println("query to get date from server : " + query);
try {
rs = stmt.executeQuery(query);
rs.next();
Date currentDate = rs.getTimestamp("sysdate");
if (currentDate.before(tokenDate)) { // token still valid
// check if the student is not already enrolled in this class
query =
"select * from enrollment e where e.student_id = '"
+ userObj.user_id
+ "' and e.course_id ='"
+ courseID
+ "'";
System.out.println("query to check if student already enrolled in clas : " + query);
try {
rs = stmt.executeQuery(query);
if (!rs
.next()) { // the query returns nothing - the student is not already enrolled in
// this class
// check if the student is not a TA in a class that have the same subject
// get the topicID of the course courseID
query = "Select * from course_topic c where course_id = '" + courseID + "'";
System.out.println(
"query get the topicID of the course courseID " + courseID + " : " + query);
try {
rs = stmt.executeQuery(query);
while (rs.next()) { // treat each topicID
String topicID = rs.getString("topic_id");
// check if the user is not a TA in the courses of the list of courseID that
// have this topicId
query =
"select c.course_id from course_topic c where c.topic_id = '"
+ topicID
+ "'";
System.out.println(
"query get the list of courseID that have topicID "
+ topicID
+ " : "
+ query);
try {
ResultSet rs2 = stmt.executeQuery(query);
while (rs2.next()) { // treat each courseID that as the same topicId that the
// token's course
// check if the user is not a TA in the course
String potentialCourseID = rs2.getString("course_id");
query =
"select * from course c where c.course_id = '"
+ potentialCourseID
+ "'";
System.out.println(
"query get data of the course " + potentialCourseID + " : " + query);
try {
ResultSet rs3 = stmt.executeQuery(query);
while (rs3
.next()) { // treat each courseID that as the same topicId that the
// token's course
// check if the user is not a TA in the course
query =
"select * from teaching_assistant t where t.student_id = '"
+ userObj.user_id
+ "' and t.course_id = '"
+ potentialCourseID
+ "' ";
System.out.println(
"query check if user as a TA in "
+ potentialCourseID
+ " : "
+ query);
try {
ResultSet rs4 = stmt.executeQuery(query);
while (rs4.next()) { // The student is a TA in the course - check each
// classes where the user is a TA
// check the expiracyDate
Date validTillDate = rs4.getDate("valid_till_dt");
if (currentDate.before(validTillDate)) { // the TA is currently a TA
isATA = true;
// Send a notification to the teachers and the user
String messageUser =
"******"
+ courseID
+ " despite you were a TA in the class "
+ potentialCourseID
+ ". The teachers of these courses receive a notification about that.";
String messageProfProtentialCourseID =
"WARNING : The student "
+ userObj.user_id
+ " is currently a TA in the class "
+ potentialCourseID
+ " and tried to be added to the class "
+ courseID;
String messageProfCourseID = messageProfProtentialCourseID;
String profProtentialCourseID = null;
String profCourseID = null;
// get the userId of the teachers
query =
"select * from taught_by t where t.course_id = '"
+ courseID
+ "' or t.course_id = '"
+ potentialCourseID
+ "' ";
System.out.println(
"query get list of profID of the courses "
+ potentialCourseID
+ " and "
+ courseID
+ ": "
+ query);
try {
ResultSet rs5 = stmt.executeQuery(query);
while (rs5.next()) { // treat each profID
String profID = rs5.getString("prof_id");
String courseOfProf = rs5.getString("course_id");
if (courseOfProf.equals(courseID)) {
profCourseID = profID;
} else {
profProtentialCourseID = profID;
}
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - jButton5ActionPerformed(java.awt.event.ActionEvent evt) -get list of profID of the courses "
+ potentialCourseID
+ " and "
+ courseID
+ ": "
+ oops);
}
// send the notification to the prof of potentialcourseID
new DataType_notification(
profProtentialCourseID,
potentialCourseID,
messageProfProtentialCourseID);
// send the notification to the prof of courseID
new DataType_notification(
profCourseID, courseID, messageProfCourseID);
// Warning message
jLabel3.setVisible(true);
jLabel3.setText("Already a TA in a similar class.");
jLabel3.setForeground(Color.red);
}
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - jButton5ActionPerformed(java.awt.event.ActionEvent evt) -check if user as a TA in "
+ potentialCourseID
+ " : "
+ oops);
}
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - jButton5ActionPerformed(java.awt.event.ActionEvent evt) -get the list of courseID that have topicID "
+ topicID
+ " : "
+ oops);
}
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - jButton5ActionPerformed(java.awt.event.ActionEvent evt) -get the list of courseID that have topicID "
+ topicID
+ " : "
+ oops);
}
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - jButton5ActionPerformed(java.awt.event.ActionEvent evt) -get the topicID of the course courseID "
+ courseID
+ " : "
+ oops);
}
if (isATA == false) { // the student is not a TA
DataType_courseAction dataCourse =
new DataType_courseAction(
courseID); // creation of a dataType related to the course
// Check if there is enough place inside the class to add this student
int noOfStudentEnrolled = dataCourse.getNoOfSudentEnrolled();
int maxStudentAllowed = dataCourse.getMaxStudentAllowed();
if (noOfStudentEnrolled + 1
<= maxStudentAllowed) { // The student can be added to the class
// Increment the number of student inrolled in the table course
query =
"UPDATE course set no_of_students_enrolled = "
+ (noOfStudentEnrolled + 1)
+ " where course_id = '"
+ courseID
+ "'";
System.out.println("query to update value of students enrolled : " + query);
try {
rs = stmt.executeQuery(query);
// Add the class and the student in the table enrollment
query =
"INSERT INTO enrollment(student_id, course_id) VALUES ('"
+ userObj.user_id
+ "', '"
+ courseID
+ "')";
System.out.println(
"query to insert in enrollment table the couple studentID and class : "
+ query);
try {
rs = stmt.executeQuery(query);
System.out.println("enrollment OK");
// Warning message
jLabel3.setVisible(true);
jLabel3.setText("Course Added Successfully");
jLabel3.setForeground(Color.green);
// Bloc for Select Course
jLabel1.setVisible(true);
jButton3.setVisible(true);
jComboBox1.setVisible(true);
// Bloc for token
jLabel2.setVisible(false);
jTextField1.setVisible(false);
jButton5.setVisible(false);
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - jButton5ActionPerformed - insert data in enrollment ("
+ courseID
+ ", "
+ userObj.user_id
+ ") : "
+ oops);
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - jButton5ActionPerformed - update value of no_of_student_enrolled of course_id"
+ courseID
+ " : "
+ oops);
}
} else { // not enought room to add an another student
System.out.println(
"No enought room for an other student. Adding is impossible.");
// Warning message
jLabel3.setVisible(true);
jLabel3.setText("enrollment impossible. No free seat.");
jLabel3.setForeground(Color.red);
}
}
} else { // student is already enrolled in this class
System.out.println(
"The course with the course_id "
+ courseID
+ " is already in the list of the user.");
// Warning message
jLabel3.setVisible(true);
jLabel3.setText("Already enrolled in.");
jLabel3.setForeground(Color.red);
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - jButton5ActionPerformed - get data related to the course_id"
+ courseID
+ " : "
+ oops);
}
} else { // the token is not valid
System.out.println("The token " + token + " is no more valid - date expired.");
// Warning message
jLabel3.setVisible(true);
jLabel3.setText("This token is expired.");
jLabel3.setForeground(Color.red);
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - jButton5ActionPerformed - get current date : " + oops);
}
}
} catch (Exception oops) {
System.out.println(
"WARNING - Student_Home - jButton5ActionPerformed - get data related to the token_id "
+ token
+ " : "
+ oops);
}
} // GEN-LAST:event_jButton5ActionPerformed
