Added Ticket Management System for Parking Spot Tracking

solutions/java/src/parkinglot/Level.java

@@ -5,13 +5,16 @@
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
 
 public class Level {
     private final int floor;
     private final List<ParkingSpot> parkingSpots;
+    private AtomicInteger availableSpots;
 
     public Level(int floor, int numSpots) {
         this.floor = floor;
+        availableSpots = new AtomicInteger(numSpots);
         parkingSpots = new ArrayList<>(numSpots);
         // Assign spots in ration of 50:40:10 for bikes, cars and trucks
         double spotsForBikes = 0.50;
@@ -31,20 +34,27 @@ public Level(int floor, int numSpots) {
         }
     }
 
-    public synchronized boolean parkVehicle(Vehicle vehicle) {
+    public synchronized Ticket parkVehicle(Vehicle vehicle) {
         for (ParkingSpot spot : parkingSpots) {
             if (spot.isAvailable() && spot.getVehicleType() == vehicle.getType()) {
                 spot.parkVehicle(vehicle);
-                return true;
+                availableSpots.incrementAndGet();
+                Ticket ticket = new Ticket(vehicle, spot.getSpotNumber(), floor, java.time.LocalDateTime.now());
+                return TicketManager.getTicket(ticket);
             }
         }
-        return false;
+        return null;
+    }
+
+    public int getAvailableSpots() {
+        return availableSpots.get();
     }
 
     public synchronized boolean unparkVehicle(Vehicle vehicle) {
         for (ParkingSpot spot : parkingSpots) {
             if (!spot.isAvailable() && spot.getParkedVehicle().equals(vehicle)) {
                 spot.unparkVehicle();
+                availableSpots.decrementAndGet();
                 return true;
             }
         }

solutions/java/src/parkinglot/ParkingLot.java

@@ -24,15 +24,19 @@ public void addLevel(Level level) {
         levels.add(level);
     }
 
-    public boolean parkVehicle(Vehicle vehicle) {
+    public Ticket parkVehicle(Vehicle vehicle) {
         for (Level level : levels) {
-            if (level.parkVehicle(vehicle)) {
+            if (level.getAvailableSpots() > 0) {
+                Ticket ticket = level.parkVehicle(vehicle);
+                if (ticket == null) {
+                    continue; // No available spot in this level
+                }
                 System.out.println("Vehicle parked successfully.");
-                return true;
+                return ticket;
             }
         }
         System.out.println("Could not park vehicle.");
-        return false;
+        return null;
     }
 
     public boolean unparkVehicle(Vehicle vehicle) {

solutions/java/src/parkinglot/ParkingLotDemo.java

@@ -16,9 +16,19 @@ public static void run() {
         Vehicle motorcycle = new Motorcycle("M1234");
 
         // Park vehicles
-        parkingLot.parkVehicle(car);
-        parkingLot.parkVehicle(truck);
-        parkingLot.parkVehicle(motorcycle);
+        Ticket ticket1 = parkingLot.parkVehicle(car);
+        Ticket ticket2 = parkingLot.parkVehicle(truck);
+        Ticket ticket3 = parkingLot.parkVehicle(motorcycle);
+
+        if(ticket1 != null) {
+            System.out.println("Car parked with ticket ID: " + ticket1.getTicketId());
+        }
+        if(ticket2 != null) {
+            System.out.println("Truck parked with ticket ID: " + ticket2.getTicketId());
+        }
+        if(ticket3 != null) {
+            System.out.println("Motorcycle parked with ticket ID: " + ticket3.getTicketId());
+        }
 
         // Display availability
         parkingLot.displayAvailability();

solutions/java/src/parkinglot/Ticket.java

@@ -0,0 +1,48 @@
+package parkinglot;
+
+import java.time.LocalDateTime;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import parkinglot.vehicletype.Vehicle;
+
+public class Ticket {
+    int ticketId;
+    Vehicle vehicle;
+    int parkingLotId;
+    int level;
+    LocalDateTime entryTime;
+
+    public Ticket(Vehicle vehicle, int parkingLotId, int level, LocalDateTime entryTime) {
+        this.vehicle = vehicle;
+        this.parkingLotId = parkingLotId;
+        this.level = level;
+        this.entryTime = entryTime;
+    }
+
+    public Ticket(AtomicInteger ticketId, Ticket ticket) {
+        this.ticketId = Integer.parseInt(ticketId.toString());
+        this.vehicle = ticket.getVehicle();
+        this.parkingLotId = ticket.getParkingLotId();
+        this.level = ticket.getLevel();
+        this.entryTime = ticket.getEntryTime();
+    }
+    private LocalDateTime getEntryTime() {
+        return  entryTime;
+    }
+
+    private int getLevel() {
+        return level;
+    }
+
+    private int getParkingLotId() {
+        return parkingLotId;
+    }
+
+    public int getTicketId() {
+        return ticketId;
+    }
+    public Vehicle getVehicle() {
+        return vehicle;
+    }
+}
+

solutions/java/src/parkinglot/TicketManager.java

@@ -0,0 +1,49 @@
+package parkinglot;
+
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
+
+
+
+public class TicketManager {
+
+
+    List<Ticket> tickets = new java.util.ArrayList<>();
+    private static TicketManager instance;
+    private static AtomicInteger ticketId  = new AtomicInteger(0);
+    public static TicketManager getInstance() {
+        if (instance == null) {
+            instance = new TicketManager();
+        }
+        return instance;
+    }
+
+    public static synchronized Ticket getTicket(Ticket ticket) {
+        ticketId.incrementAndGet();
+        return new Ticket(ticketId, ticket);
+    }
+
+
+    public Ticket getTicket(int ticketId) {
+        for (Ticket ticket : tickets) {
+            if (ticket.getTicketId() == ticketId) {
+                return ticket;
+            }
+        }
+        return null;
+    }
+    public void addTicket(Ticket ticket) {
+        tickets.add(ticket);
+    }
+    public void removeTicket(int ticketId) {
+        Ticket ticket = getTicket(ticketId);
+        if (ticket != null) {
+            tickets.remove(ticket);
+        }
+    }
+    public List<Ticket> getAllTickets() {
+        return tickets;
+    }
+
+}
+