updated backend so booked appointment automatically changes to completed

backend/src/main/java/com/petshop/backend/BackendApplication.java

@@ -4,8 +4,10 @@ import com.petshop.backend.config.FlywayContextInitializer;
 import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.data.web.config.EnableSpringDataWebSupport;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
 @SpringBootApplication
+@EnableScheduling
 @EnableSpringDataWebSupport(pageSerializationMode = EnableSpringDataWebSupport.PageSerializationMode.VIA_DTO)
 public class BackendApplication {
     public static void main(String[] args) {

backend/src/main/java/com/petshop/backend/config/ApplicationStartupListener.java

@@ -0,0 +1,22 @@
+package com.petshop.backend.config;
+
+import com.petshop.backend.service.AppointmentService;
+import org.springframework.context.ApplicationListener;
+import org.springframework.context.event.ContextRefreshedEvent;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ApplicationStartupListener implements ApplicationListener<ContextRefreshedEvent> {
+
+    private final AppointmentService appointmentService;
+
+    public ApplicationStartupListener(AppointmentService appointmentService) {
+        this.appointmentService = appointmentService;
+    }
+
+    @Override
+    public void onApplicationEvent(ContextRefreshedEvent event) {
+        //update booked appointments to complete on startup
+        appointmentService.updatePastAppointmentsStatus();
+    }
+}

backend/src/main/java/com/petshop/backend/repository/AppointmentRepository.java

@@ -47,4 +47,7 @@ public interface AppointmentRepository extends JpaRepository<Appointment, Long>
 
     @Query("SELECT a FROM Appointment a JOIN FETCH a.service WHERE a.employee.id IN :employeeIds AND a.appointmentDate = :date AND LOWER(a.appointmentStatus) NOT IN ('cancelled', 'missed')")
     List<Appointment> findByEmployeeIdInAndAppointmentDate(@Param("employeeIds") List<Long> employeeIds, @Param("date") LocalDate date);
+
+    @Query("SELECT a FROM Appointment a WHERE (a.appointmentDate < :currentDate OR (a.appointmentDate = :currentDate AND a.appointmentTime < :currentTime)) AND LOWER(a.appointmentStatus) = 'booked'")
+    List<Appointment> findPastBookedAppointments(@Param("currentDate") LocalDate currentDate, @Param("currentTime") LocalTime currentTime);
 }

backend/src/main/java/com/petshop/backend/service/AppointmentService.java

@@ -16,6 +16,7 @@ import com.petshop.backend.repository.UserRepository;
 import com.petshop.backend.util.AuthenticationHelper;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
+import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.security.access.AccessDeniedException;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -209,6 +210,20 @@ public class AppointmentService {
         return availableSlots;
     }
 
+    //Update booked status to completed at every midnight
+    @Scheduled(cron = "0 0 0 * * ?")
+    @Transactional
+    public void updatePastAppointmentsStatus() {
+        LocalDate currentDate = LocalDate.now();
+        LocalTime currentTime = LocalTime.now();
+        List<Appointment> pastBookedAppointments = appointmentRepository.findPastBookedAppointments(currentDate, currentTime);
+
+        for (Appointment appointment : pastBookedAppointments) {
+            appointment.setAppointmentStatus("COMPLETED");
+            appointmentRepository.save(appointment);
+        }
+    }
+
     private String normalizeFilter(String value) {
         if (value == null) {
             return null;