Backend Functions Implemented for SessionTime, Cancel, ProfileDetails

backend/src/main/java/com/lyrne/backend/TimeSlot.java

@@ -19,7 +19,43 @@ public class TimeSlot{ // A timeslot object that can be created by a tutor
     private String start;
     private String end;
     public String id; // the ID will just be a concatenation of the start time & tutor ID for now
+    private float price;
+
+    // These long variables are assigned when the session actually starts and stops
+    private long sessionStart;
+    private long elapsedTime;
+    private long elapsedSeconds;
+    private long secondsDisplay;
+    private long elapsedMinutes;
+    private String minutesAndSeconds; // String Representation of Time
+
+    // Getter methods for all time tracking variables
+    public long getSessionStart() { return sessionStart; }
+    public long getElapsedTime() { return elapsedTime; }
+    public long getElapsedSeconds() { return elapsedSeconds; }
+    public long getSecondsDisplay() { return secondsDisplay; }
+    public long getElapsedMinutes() { return elapsedMinutes; }
+    public String getMinutesAndSeconds() { return minutesAndSeconds; }
+
+    // Call this when the session starts (when someone first joins the call or something)
+    public void startSession() {
+        sessionStart = System.currentTimeMillis();
+        elapsedTime = 0;
+    }
+
+    // Called when the session has stopped
+    public void updateTimes() {
+        elapsedSeconds = elapsedTime / 1000;
+        secondsDisplay = elapsedSeconds % 60;
+        elapsedMinutes = elapsedSeconds / 60;
+        minutesAndSeconds = elapsedMinutes + ":" + secondsDisplay;
+    }
 
+    // Call this when the session is over (everyone leaves the call or something)
+    public void stopSession() {
+        elapsedTime = System.currentTimeMillis();
+        updateTimes();
+    }
 
     public TimeSlot(DateTime start, DateTime end, String tutorID){ 
 
@@ -62,6 +98,7 @@ public String getBookedBy() {
     public String getID(){
         return id;
     }
+    public float getPrice() { return price; }
 
     public boolean isBooked(){
         return booked;

backend/src/main/java/com/lyrne/backend/User.java

@@ -8,9 +8,11 @@
 import me.mrnavastar.sqlib.api.DataContainer;
 import me.mrnavastar.sqlib.api.types.JavaTypes;
 
+import org.apache.logging.log4j.core.util.ArrayUtils;
 import org.joda.time.DateTime;
 import org.joda.time.Interval;
 
+import java.lang.reflect.Array;
 import java.util.ArrayList;
 import java.util.Map;
 
@@ -59,14 +61,28 @@ public User(DataContainer container) {
 
     // This function should be called everytime there are session changes
     public void updateHoursAndEarnings() {
+        // Reset the values to zero to recalculate would be easy, but take up a lot of time
+        weeklyHours = 0;
+        weeklyEarnings = 0;
+        // We could also try remembering which session it was and remove it that way to save time
         for (TimeSlot session: sessions) {
-            weeklyHours++; // There should be a value of time in each session
-            weeklyEarnings++; // There should be a value of earnings in each session
+            weeklyHours += Float.valueOf(session.getEndTime()) - Float.valueOf(session.getStartTime());
+            weeklyEarnings+= session.getPrice(); // There should be a value of earnings in each session
         }
     }
 
+    // Cancel a session by inserting the reference to the session
+    public void cancelSession(String ID) {
+        for (TimeSlot session: sessions) {
+            if (ID == session.getID()) {
+                sessions.remove(session);
+            }
+        }
+        updateHoursAndEarnings();
+    }
+
     // HashMap for checking which user details are public (true) or private (false)
-    Map<String, Boolean> visibility = Map.ofEntries(
+    public Map<String, Boolean> visibility = Map.ofEntries(
            Map.entry("id", true),
            Map.entry("username", true),
            Map.entry("email", false),