Added comments.

SchedulerApp/src/main/java/com/example/scheduler_server/TimeOff.java

@@ -9,12 +9,32 @@ import java.sql.*;
  */
 public class TimeOff {
 
+    // Object that facilitates the connection to the database
     private final Connection dbConnection;
 
+    /*
+    Name: TimeOff Constructor
+    Parameters:
+        Connection c: The connection to the database.
+    Description: Instantiates a TimeOff object and sets the global connection for the methods.
+    Return: TimeOff Object
+     */
     protected TimeOff(Connection c) {
         this.dbConnection = c;
     }
 
+    /*
+    Name: addTimeOff
+    Parameters:
+        int employeeID: The ID of an employee.
+        String startDate: The start date of the time off in "yyyy-mm-dd" format.
+        String endDate: The end date of the time off in "yyyy-mm-dd" format.
+        boolean approved: True if the time off is approved by a manager.
+        String reason: Why the time off was requested.
+    Description:
+    Return:
+        String: The details of the time off separated by commas.
+     */
     protected String addTimeOff(int employeeID, String startDate, String endDate, boolean approved, String reason){
         String newTimeOff = "";
         try {
@@ -36,6 +56,14 @@ public class TimeOff {
         return newTimeOff;
     }
 
+    /*
+    Name: removeTimeOff
+    Parameters:
+        int timeOffID: The id of the time off request.
+    Description: Removes the time off request.
+    Return:
+        String: The time off id of the shift if it was removed, and -1 if there was a problem with the query.
+     */
     protected int removeTimeOff(int timeOffID){
         try {
             Statement myStatement = dbConnection.createStatement();
@@ -47,13 +75,23 @@ public class TimeOff {
         return timeOffID;
     }
 
-    protected String setTimeOffApproval(int ID, String approved){
+    /*
+    Name: setTimeOffApproval
+    Parameters:
+        int timeOffID: The id of the time off request.
+        String approved: "true" if its approved and "false" if it's not.
+    Description: Change the approval status of a request.
+    Return:
+        String: If the time off approval was successfully changed than it returns the id and the approval separated by
+        commas, or if there was an error with the query then it returns an empty string.
+     */
+    protected String setTimeOffApproval(int timeOffID, String approved){
         String editedTimeOff = "";
-        System.out.println(ID + " and " + approved);
+        System.out.println(timeOffID + " and " + approved);
         try {
             Statement myStatement = dbConnection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
-            myStatement.executeUpdate("update TimeOff set approved=" + approved + " where ID=" + ID);
-            ResultSet myRs = myStatement.executeQuery("select * from TimeOff where ID=" + ID);
+            myStatement.executeUpdate("update TimeOff set approved=" + approved + " where ID=" + timeOffID);
+            ResultSet myRs = myStatement.executeQuery("select * from TimeOff where ID=" + timeOffID);
             if (myRs.last()) {
                 editedTimeOff = myRs.getString("ID") + "," + myRs.getString("approved");
             }
@@ -65,6 +103,13 @@ public class TimeOff {
         return editedTimeOff;
     }
 
+    /*
+    Name: removeAllTimeOffByID
+    Parameters:
+        int employeeID: The id of an employee.
+    Description: Removes all time off request for a specified employee.
+    Return: void
+     */
     protected void removeAllTimeOffByID(int employeeID) {
         try {
             Statement myStatement = dbConnection.createStatement();
@@ -74,6 +119,14 @@ public class TimeOff {
         }
     }
 
+    /*
+    Name: allTimeOff
+    Parameters: none
+    Description: Gets all the time off request.
+    Return:
+        String: All the time off data where all the time offs are separated by slashes and each detail is separated by
+        commas.
+     */
     protected String allTimeOff(){
         StringBuilder response = new StringBuilder("allTimeOff");
         try {