android/app/src/main/java/com/example/petstoremobile/fragments/listfragments/detailfragments/AppointmentDetailFragment.java

@@ -1,10 +1,12 @@
 package com.example.petstoremobile.fragments.listfragments.detailfragments;
 
-import android.app.DatePickerDialog;
 import android.os.Bundle;
-import android.util.Log;
-import android.view.*;
-import android.widget.*;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.Toast;
+
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
@@ -12,15 +14,15 @@ import androidx.lifecycle.ViewModelProvider;
 import androidx.navigation.fragment.NavHostFragment;
 
 import com.example.petstoremobile.databinding.FragmentAppointmentDetailBinding;
-import com.example.petstoremobile.dtos.*;
+import com.example.petstoremobile.dtos.AppointmentDTO;
+import com.example.petstoremobile.dtos.DropdownDTO;
+import com.example.petstoremobile.dtos.ServiceDTO;
 import com.example.petstoremobile.utils.DateTimeUtils;
 import com.example.petstoremobile.utils.DialogUtils;
 import com.example.petstoremobile.utils.Resource;
 import com.example.petstoremobile.utils.SpinnerUtils;
 import com.example.petstoremobile.utils.UIUtils;
-import com.example.petstoremobile.viewmodels.AppointmentViewModel;
-
-import java.util.*;
+import com.example.petstoremobile.viewmodels.AppointmentDetailViewModel;
 
 import dagger.hilt.android.AndroidEntryPoint;
 
@@ -38,24 +40,33 @@ public class AppointmentDetailFragment extends Fragment {
     private long preselectedStoreId = -1;
     private long preselectedStaffId = -1;
 
-    private final Integer[] HOURS = {9,10,11,12,13,14,15,16,17};
-    private final Integer[] MINUTES = {0,15,30,45};
+    private final Integer[] HOURS = {9, 10, 11, 12, 13, 14, 15, 16, 17};
+    private final Integer[] MINUTES = {0, 15, 30, 45};
 
-    private AppointmentViewModel appointmentViewModel;
+    private AppointmentDetailViewModel appointmentViewModel;
     private boolean isUpdatingUI = false;
 
+    /**
+     * Called when the fragment is first created.
+     */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        appointmentViewModel = new ViewModelProvider(this).get(AppointmentViewModel.class);
+        appointmentViewModel = new ViewModelProvider(this).get(AppointmentDetailViewModel.class);
     }
 
+    /**
+     * Creates and returns the view hierarchy with the fragment.
+     */
     @Override
     public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         binding = FragmentAppointmentDetailBinding.inflate(inflater, container, false);
         return binding.getRoot();
     }
 
+    /**
+     * Called immediately after onCreateView has returned.
+     */
     @Override
     public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
@@ -70,6 +81,9 @@ public class AppointmentDetailFragment extends Fragment {
         binding.btnDeleteAppointment.setOnClickListener(v -> confirmDelete());
     }
 
+    /**
+     * Called when the view previously created by onCreateView has been detached.
+     */
     @Override
     public void onDestroyView() {
         super.onDestroyView();
@@ -77,7 +91,7 @@ public class AppointmentDetailFragment extends Fragment {
     }
 
     /**
-     * Configures the adapters for spinners.
+     * Configures the adapters and listeners for all spinners.
      */
     private void setupSpinners() {
         //Status Spinner is empty by default the date determines whats in here
@@ -86,9 +100,9 @@ public class AppointmentDetailFragment extends Fragment {
         // Set up hour and minute spinners
         String[] hours = new String[HOURS.length];
         for (int i = 0; i < HOURS.length; i++)
-            hours[i] = String.format("%02d:00", HOURS[i]);
+            hours[i] = DateTimeUtils.formatTime(HOURS[i], 0);
         SpinnerUtils.setupStringSpinner(requireContext(), binding.spinnerHour, hours);
-        SpinnerUtils.setupStringSpinner(requireContext(), binding.spinnerMinute, new String[]{"00","15","30","45"});
+        SpinnerUtils.setupStringSpinner(requireContext(), binding.spinnerMinute, new String[]{"00", "15", "30", "45"});
 
         // Pet and Staff spinners disabled by until parent selection
         UIUtils.setViewsEnabled(false, binding.spinnerPet, binding.spinnerStaff);
@@ -114,42 +128,24 @@ public class AppointmentDetailFragment extends Fragment {
         });
 
         // Listeners for other selections
-        binding.spinnerService.setOnItemSelectedListener(new OnIndexSelected(p -> appointmentViewModel.onServiceSelected(p)));
-        binding.spinnerPet.setOnItemSelectedListener(new OnIndexSelected(p -> appointmentViewModel.onPetSelected(p)));
-        binding.spinnerStaff.setOnItemSelectedListener(new OnIndexSelected(p -> appointmentViewModel.onStaffSelected(p)));
+        SpinnerUtils.setOnIndexSelectedListener(binding.spinnerService, p -> appointmentViewModel.onServiceSelected(p));
+        SpinnerUtils.setOnIndexSelectedListener(binding.spinnerPet, p -> appointmentViewModel.onPetSelected(p));
+        SpinnerUtils.setOnIndexSelectedListener(binding.spinnerStaff, p -> appointmentViewModel.onStaffSelected(p));
 
         // Listeners for time changes
-        binding.spinnerHour.setOnItemSelectedListener(new OnIndexSelected(p -> notifyDateTimeStatusChange()));
-        binding.spinnerMinute.setOnItemSelectedListener(new OnIndexSelected(p -> notifyDateTimeStatusChange()));
+        SpinnerUtils.setOnIndexSelectedListener(binding.spinnerHour, p -> notifyDateTimeStatusChange());
+        SpinnerUtils.setOnIndexSelectedListener(binding.spinnerMinute, p -> notifyDateTimeStatusChange());
 
         // Listener to notify ViewModel of status selection
-        binding.spinnerAppointmentStatus.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
-            @Override
-            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
-                notifyDateTimeStatusChange();
-            }
-            @Override
-            public void onNothingSelected(AdapterView<?> parent) {}
-        });
+        SpinnerUtils.setOnIndexSelectedListener(binding.spinnerAppointmentStatus, p -> notifyDateTimeStatusChange());
     }
 
     /**
      * Configures the date picker dialog for the appointment date field.
      */
     private void setupDatePicker() {
-        binding.etAppointmentDate.setOnClickListener(v -> {
-            Calendar c = Calendar.getInstance();
-            DatePickerDialog d = new DatePickerDialog(requireContext(),
-                    (dp,y,m,d1) -> {
-                        String selectedDate = String.format("%04d-%02d-%02d", y, m+1, d1);
-                        binding.etAppointmentDate.setText(selectedDate);
-                        notifyDateTimeStatusChange();
-                    },
-                    c.get(Calendar.YEAR), c.get(Calendar.MONTH),
-                    c.get(Calendar.DAY_OF_MONTH));
-            d.getDatePicker().setMinDate(System.currentTimeMillis() - 1000);
-            d.show();
-        });
+        binding.etAppointmentDate.setOnClickListener(v -> 
+                UIUtils.showDatePicker(requireContext(), binding.etAppointmentDate, this::notifyDateTimeStatusChange));
     }
 
     /**
@@ -178,37 +174,27 @@ public class AppointmentDetailFragment extends Fragment {
     /**
      * Applies the ViewState provided by the ViewModel to the UI components.
      */
-    private void applyViewState(AppointmentViewModel.ViewState state) {
+    private void applyViewState(AppointmentDetailViewModel.ViewState state) {
         isUpdatingUI = true;
         
         // Mode specific UI
         binding.tvApptMode.setText(state.isEditing ? "Edit Appointment" : "Add Appointment");
-        binding.tvAppointmentId.setText("ID: " + appointmentViewModel.getAppointmentId());
+        binding.tvAppointmentId.setText(DateTimeUtils.formatId(appointmentViewModel.getAppointmentId()));
         binding.tvAppointmentId.setVisibility(state.isEditing ? View.VISIBLE : View.GONE);
         binding.btnDeleteAppointment.setVisibility(state.isDeleteVisible ? View.VISIBLE : View.GONE);
         binding.btnSaveAppointment.setVisibility(state.isSaveVisible ? View.VISIBLE : View.GONE);
         
-        // Enabling/Disabling Views
-        UIUtils.setViewsEnabled(state.isCustomerEnabled, binding.spinnerCustomer);
-        UIUtils.setViewsEnabled(state.isStoreEnabled, binding.spinnerStore);
-        UIUtils.setViewsEnabled(state.isPetEnabled, binding.spinnerPet);
-        UIUtils.setViewsEnabled(state.isServiceEnabled, binding.spinnerService);
-        UIUtils.setViewsEnabled(state.isStaffEnabled, binding.spinnerStaff);
-        UIUtils.setViewsEnabled(state.isDateEnabled, binding.etAppointmentDate);
-        UIUtils.setViewsEnabled(state.isTimeEnabled, binding.spinnerHour, binding.spinnerMinute);
+        // Enabling/Disabling Views and Labels
+        UIUtils.setFieldEnabled(state.isCustomerEnabled, binding.spinnerCustomer, binding.tvLabelCustomer);
+        UIUtils.setFieldEnabled(state.isStoreEnabled, binding.spinnerStore, binding.tvLabelStore);
+        UIUtils.setFieldEnabled(state.isPetEnabled, binding.spinnerPet, binding.tvLabelPet);
+        UIUtils.setFieldEnabled(state.isServiceEnabled, binding.spinnerService, binding.tvLabelService);
+        UIUtils.setFieldEnabled(state.isStaffEnabled, binding.spinnerStaff, binding.tvLabelStaff);
+        UIUtils.setFieldEnabled(state.isDateEnabled, binding.etAppointmentDate, binding.tvLabelDate);
+        UIUtils.setFieldEnabled(state.isTimeEnabled, binding.spinnerHour, binding.tvLabelTime);
+        UIUtils.setViewsEnabled(state.isTimeEnabled, binding.spinnerMinute);
         UIUtils.setViewsEnabled(state.isStatusEnabled, binding.spinnerAppointmentStatus);
 
-        // Alpha for disabled look
-        float alpha = 1.0f;
-        float disabledAlpha = 0.5f;
-        UIUtils.setViewsAlpha(state.isCustomerEnabled ? alpha : disabledAlpha, binding.tvLabelCustomer);
-        UIUtils.setViewsAlpha(state.isStoreEnabled ? alpha : disabledAlpha, binding.tvLabelStore);
-        UIUtils.setViewsAlpha(state.isPetEnabled ? alpha : disabledAlpha, binding.tvLabelPet);
-        UIUtils.setViewsAlpha(state.isServiceEnabled ? alpha : disabledAlpha, binding.tvLabelService);
-        UIUtils.setViewsAlpha(state.isStaffEnabled ? alpha : disabledAlpha, binding.tvLabelStaff);
-        UIUtils.setViewsAlpha(state.isDateEnabled ? alpha : disabledAlpha, binding.tvLabelDate);
-        UIUtils.setViewsAlpha(state.isTimeEnabled ? alpha : disabledAlpha, binding.tvLabelTime);
-
         // Update status options
         Object selected = binding.spinnerAppointmentStatus.getSelectedItem();
         String current = selected != null ? selected.toString() : "";
@@ -218,6 +204,9 @@ public class AppointmentDetailFragment extends Fragment {
         isUpdatingUI = false;
     }
 
+    /**
+     * Notifies the ViewModel that the date, time, or status has changed.
+     */
     private void notifyDateTimeStatusChange() {
         if (isUpdatingUI) return;
 
@@ -282,7 +271,7 @@ public class AppointmentDetailFragment extends Fragment {
 
         appointmentViewModel.saveAppointment(date, time, status).observe(getViewLifecycleOwner(), resource -> {
             if (resource.status == Resource.Status.SUCCESS) {
-                AppointmentViewModel.ViewState state = appointmentViewModel.getViewState().getValue();
+                AppointmentDetailViewModel.ViewState state = appointmentViewModel.getViewState().getValue();
                 String message = (state != null && state.isEditing) ? "Updated" : "Saved";
                 Toast.makeText(getContext(), message, Toast.LENGTH_SHORT).show();
                 navigateBack();
@@ -296,24 +285,19 @@ public class AppointmentDetailFragment extends Fragment {
      * Validates that all required fields are selected.
      */
     private boolean validateRequiredFields() {
-        if (binding.spinnerCustomer.getSelectedItemPosition() == 0) return showToast("Select a customer");
-        if (binding.spinnerStore.getSelectedItemPosition() == 0) return showToast("Select a store");
-        if (binding.spinnerPet.getSelectedItemPosition() == 0) return showToast("Select a pet");
-        if (binding.spinnerService.getSelectedItemPosition() == 0) return showToast("Select a service");
-        if (binding.etAppointmentDate.getText().toString().trim().isEmpty()) return showToast("Select a date");
+        if (binding.spinnerCustomer.getSelectedItemPosition() == 0) return UIUtils.showToast(getContext(), "Select a customer");
+        if (binding.spinnerStore.getSelectedItemPosition() == 0) return UIUtils.showToast(getContext(), "Select a store");
+        if (binding.spinnerPet.getSelectedItemPosition() == 0) return UIUtils.showToast(getContext(), "Select a pet");
+        if (binding.spinnerService.getSelectedItemPosition() == 0) return UIUtils.showToast(getContext(), "Select a service");
+        if (binding.etAppointmentDate.getText().toString().trim().isEmpty()) return UIUtils.showToast(getContext(), "Select a date");
         return true;
     }
 
-    private boolean showToast(String msg) {
-        Toast.makeText(getContext(), msg, Toast.LENGTH_SHORT).show();
-        return false;
-    }
-
     /**
      * Builds a time string from the hour and minute spinners.
      */
     private String buildTimeString() {
-        return String.format("%02d:%02d", HOURS[binding.spinnerHour.getSelectedItemPosition()], MINUTES[binding.spinnerMinute.getSelectedItemPosition()]);
+        return DateTimeUtils.formatTime(HOURS[binding.spinnerHour.getSelectedItemPosition()], MINUTES[binding.spinnerMinute.getSelectedItemPosition()]);
     }
 
     /**
@@ -358,17 +342,7 @@ public class AppointmentDetailFragment extends Fragment {
     private void parseAndSetTimeSpinners(String time) {
         int[] parsedTime = DateTimeUtils.parseTimeString(time);
         if (parsedTime == null) return;
-        for (int i = 0; i < HOURS.length; i++) if (HOURS[i] == parsedTime[0]) binding.spinnerHour.setSelection(i);
-        for (int i = 0; i < MINUTES.length; i++) if (MINUTES[i] == parsedTime[1]) binding.spinnerMinute.setSelection(i);
-    }
-
-    /**
-     * Helper listener for simple index reporting.
-     */
-    private static class OnIndexSelected implements AdapterView.OnItemSelectedListener {
-        private final java.util.function.Consumer<Integer> callback;
-        public OnIndexSelected(java.util.function.Consumer<Integer> callback) { this.callback = callback; }
-        @Override public void onItemSelected(AdapterView<?> p, View v, int pos, long id) { callback.accept(pos); }
-        @Override public void onNothingSelected(AdapterView<?> p) {}
+        SpinnerUtils.setSelectionByValueArray(binding.spinnerHour, HOURS, parsedTime[0]);
+        SpinnerUtils.setSelectionByValueArray(binding.spinnerMinute, MINUTES, parsedTime[1]);
     }
 }

android/app/src/main/java/com/example/petstoremobile/utils/DateTimeUtils.java

@@ -3,6 +3,7 @@ package com.example.petstoremobile.utils;
 import android.util.Log;
 
 import java.util.Calendar;
+import java.util.Locale;
 
 /**
  * Utility class for date and time operations.
@@ -78,7 +79,7 @@ public class DateTimeUtils {
     }
 
     /**
-     * Parses a time string and returns hour and minute indices for the spinners.
+     * Parses a time string and returns hour and minute values.
      */
     public static int[] parseTimeString(String time) {
         if (time == null || time.isEmpty()) return null;
@@ -95,4 +96,18 @@ public class DateTimeUtils {
             return null;
         }
     }
+
+    /**
+     * Formats an hour and minute into an HH:mm string.
+     */
+    public static String formatTime(int hour, int minute) {
+        return String.format(Locale.getDefault(), "%02d:%02d", hour, minute);
+    }
+
+    /**
+     * Formats an ID for display (e.g., "ID: 123").
+     */
+    public static String formatId(long id) {
+        return String.format(Locale.getDefault(), "ID: %d", id);
+    }
 }

android/app/src/main/java/com/example/petstoremobile/utils/SpinnerUtils.java

@@ -12,6 +12,7 @@ import com.example.petstoremobile.adapters.WhiteTextArrayAdapter;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
+import java.util.function.Consumer;
 import java.util.function.Function;
 
 /**
@@ -96,6 +97,13 @@ public class SpinnerUtils {
         });
     }
 
+    /**
+     * Sets a listener that provides the selected index to a consumer.
+     */
+    public static void setOnIndexSelectedListener(Spinner spinner, Consumer<Integer> callback) {
+        spinner.setOnItemSelectedListener(new OnIndexSelected(callback));
+    }
+
     /**
      * Sets the selection of a spinner based on a string value.
      */
@@ -108,6 +116,19 @@ public class SpinnerUtils {
         }
     }
 
+    /**
+     * Sets the selection of a spinner based on a value within an array.
+     */
+    public static <T> void setSelectionByValueArray(Spinner spinner, T[] array, T value) {
+        if (spinner == null || array == null || value == null) return;
+        for (int i = 0; i < array.length; i++) {
+            if (Objects.equals(array[i], value)) {
+                spinner.setSelection(i);
+                return;
+            }
+        }
+    }
+
     /**
      * Configures a simple string array spinner.
      */
@@ -117,4 +138,23 @@ public class SpinnerUtils {
         adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
         spinner.setAdapter(adapter);
     }
+
+    /**
+     * Helper listener to get selected index from a spinner.
+     */
+    public static class OnIndexSelected implements AdapterView.OnItemSelectedListener {
+        private final Consumer<Integer> callback;
+
+        public OnIndexSelected(Consumer<Integer> callback) {
+            this.callback = callback;
+        }
+
+        @Override
+        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+            callback.accept(position);
+        }
+
+        @Override
+        public void onNothingSelected(AdapterView<?> parent) {}
+    }
 }

android/app/src/main/java/com/example/petstoremobile/utils/UIUtils.java

@@ -1,5 +1,7 @@
 package com.example.petstoremobile.utils;
 
+import android.app.DatePickerDialog;
+import android.content.Context;
 import android.telephony.PhoneNumberFormattingTextWatcher;
 import android.text.Editable;
 import android.text.InputFilter;
@@ -8,10 +10,14 @@ import android.view.View;
 import android.widget.EditText;
 import android.widget.ImageButton;
 import android.widget.Spinner;
+import android.widget.Toast;
 
 import androidx.fragment.app.Fragment;
 import com.example.petstoremobile.fragments.ListFragment;
 
+import java.util.Calendar;
+import java.util.Locale;
+
 /**
  * Utility class for shared UI component logic and formatting.
  */
@@ -32,7 +38,6 @@ public class UIUtils {
             boolean isVisible = layoutFilter.getVisibility() == View.VISIBLE;
             layoutFilter.setVisibility(isVisible ? View.GONE : View.VISIBLE);
             
-            // Use Android default icons or app-specific ones if available
             btnToggle.setImageResource(isVisible ? 
                     android.R.drawable.ic_menu_search : 
                     android.R.drawable.ic_menu_close_clear_cancel);
@@ -69,7 +74,6 @@ public class UIUtils {
 
     /**
      * Sets the enabled state and alpha for multiple views.
-     * Alpha is set to 1.0f when enabled and 0.5f when disabled.
      */
     public static void setViewsEnabled(boolean enabled, View... views) {
         for (View v : views) {
@@ -80,6 +84,19 @@ public class UIUtils {
         }
     }
 
+    /**
+     * Sets enabled state for a field and updates alpha for both the field and its label.
+     */
+    public static void setFieldEnabled(boolean enabled, View field, View label) {
+        if (field != null) {
+            field.setEnabled(enabled);
+            field.setAlpha(enabled ? 1.0f : 0.5f);
+        }
+        if (label != null) {
+            label.setAlpha(enabled ? 1.0f : 0.5f);
+        }
+    }
+
     /**
      * Sets the alpha for multiple views.
      */
@@ -90,4 +107,31 @@ public class UIUtils {
             }
         }
     }
+
+    /**
+     * Displays a DatePickerDialog and sets the result to an EditText.
+     */
+    public static void showDatePicker(Context context, EditText editText, Runnable onDateSet) {
+        Calendar c = Calendar.getInstance();
+        DatePickerDialog d = new DatePickerDialog(context,
+                (dp, y, m, d1) -> {
+                    String selectedDate = String.format(Locale.getDefault(), "%04d-%02d-%02d", y, m + 1, d1);
+                    editText.setText(selectedDate);
+                    if (onDateSet != null) onDateSet.run();
+                },
+                c.get(Calendar.YEAR), c.get(Calendar.MONTH),
+                c.get(Calendar.DAY_OF_MONTH));
+        d.getDatePicker().setMinDate(System.currentTimeMillis() - 1000);
+        d.show();
+    }
+
+    /**
+     * Displays a toast and returns false. Useful for validation chains.
+     */
+    public static boolean showToast(Context context, String msg) {
+        if (context != null) {
+            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
+        }
+        return false;
+    }
 }

android/app/src/main/java/com/example/petstoremobile/viewmodels/AppointmentDetailViewModel.java

@@ -0,0 +1,402 @@
+package com.example.petstoremobile.viewmodels;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import com.example.petstoremobile.dtos.AppointmentDTO;
+import com.example.petstoremobile.dtos.DropdownDTO;
+import com.example.petstoremobile.dtos.ServiceDTO;
+import com.example.petstoremobile.repositories.AppointmentRepository;
+import com.example.petstoremobile.repositories.CustomerRepository;
+import com.example.petstoremobile.repositories.PetRepository;
+import com.example.petstoremobile.repositories.ServiceRepository;
+import com.example.petstoremobile.repositories.StoreRepository;
+import com.example.petstoremobile.utils.DateTimeUtils;
+import com.example.petstoremobile.utils.Resource;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.inject.Inject;
+
+import dagger.hilt.android.lifecycle.HiltViewModel;
+
+/**
+ * ViewModel for managing appointment details and form state.
+ */
+@HiltViewModel
+public class AppointmentDetailViewModel extends ViewModel {
+    private final AppointmentRepository repository;
+    private final CustomerRepository customerRepository;
+    private final StoreRepository storeRepository;
+    private final PetRepository petRepository;
+    private final ServiceRepository serviceRepository;
+
+    private final MutableLiveData<List<DropdownDTO>> customers = new MutableLiveData<>();
+    private final MutableLiveData<List<DropdownDTO>> stores = new MutableLiveData<>();
+    private final MutableLiveData<List<ServiceDTO>> services = new MutableLiveData<>();
+    private final MutableLiveData<List<DropdownDTO>> customerPets = new MutableLiveData<>();
+    private final MutableLiveData<List<DropdownDTO>> storeEmployees = new MutableLiveData<>();
+    private final MutableLiveData<ViewState> viewState = new MutableLiveData<>(new ViewState());
+
+    private long appointmentId = -1;
+    private Long currentCustomerId;
+    private Long currentStoreId;
+    private Long currentPetId;
+    private Long currentServiceId;
+    private Long currentStaffId;
+
+    /**
+     * Constructor for AppointmentDetailViewModel.
+     */
+    @Inject
+    public AppointmentDetailViewModel(
+            AppointmentRepository repository,
+            CustomerRepository customerRepository,
+            StoreRepository storeRepository,
+            PetRepository petRepository,
+            ServiceRepository serviceRepository) {
+        this.repository = repository;
+        this.customerRepository = customerRepository;
+        this.storeRepository = storeRepository;
+        this.petRepository = petRepository;
+        this.serviceRepository = serviceRepository;
+    }
+
+    // Initial Data Loading
+
+    /**
+     * Loads initial dropdown data for customers, stores, and services.
+     */
+    public void loadInitialFormData() {
+        customerRepository.getCustomerDropdowns().observeForever(r -> {
+            if (r.status == Resource.Status.SUCCESS) customers.setValue(r.data);
+        });
+        storeRepository.getStoreDropdowns().observeForever(r -> {
+            if (r.status == Resource.Status.SUCCESS) stores.setValue(r.data);
+        });
+        serviceRepository.getAllServices(0, 200, null, "serviceName").observeForever(r -> {
+            if (r.status == Resource.Status.SUCCESS && r.data != null) services.setValue(r.data.getContent());
+        });
+    }
+
+    // LiveData Getters
+
+    /**
+     * Returns the LiveData for the list of customers.
+     */
+    public LiveData<List<DropdownDTO>> getCustomers() { return customers; }
+
+    /**
+     * Returns the LiveData for the list of stores.
+     */
+    public LiveData<List<DropdownDTO>> getStores() { return stores; }
+
+    /**
+     * Returns the LiveData for the list of services.
+     */
+    public LiveData<List<ServiceDTO>> getServices() { return services; }
+
+    /**
+     * Returns the LiveData for the list of pets for the current customer.
+     */
+    public LiveData<List<DropdownDTO>> getCustomerPets() { return customerPets; }
+
+    /**
+     * Returns the LiveData for the list of employees for the current store.
+     */
+    public LiveData<List<DropdownDTO>> getStoreEmployees() { return storeEmployees; }
+
+    /**
+     * Returns the LiveData for the view state.
+     */
+    public LiveData<ViewState> getViewState() { return viewState; }
+
+    //State Getters
+
+    /**
+     * Returns the current appointment ID.
+     */
+    public long getAppointmentId() { return appointmentId; }
+
+    /**
+     * Sets the current appointment ID and updates the mode.
+     */
+    public void setAppointmentId(long id) {
+        this.appointmentId = id;
+        initMode(id != -1);
+    }
+
+    // Selection Handlers for spinners
+
+    /**
+     * Handles customer selection and loads their pets.
+     */
+    public void onCustomerSelected(int position) {
+        List<DropdownDTO> list = customers.getValue();
+        if (position > 0 && list != null && position <= list.size()) {
+            currentCustomerId = list.get(position - 1).getId();
+            loadPetsForCustomer(currentCustomerId);
+            updateViewState(s -> {
+                s.selectedCustomerId = currentCustomerId;
+                s.isPetEnabled = !s.isEditing;
+            });
+        } else {
+            currentCustomerId = null;
+            customerPets.setValue(new ArrayList<>());
+            updateViewState(s -> {
+                s.selectedCustomerId = null;
+                s.isPetEnabled = false;
+            });
+        }
+    }
+
+    /**
+     * Handles store selection and loads its employees.
+     */
+    public void onStoreSelected(int position) {
+        List<DropdownDTO> list = stores.getValue();
+        if (position > 0 && list != null && position <= list.size()) {
+            currentStoreId = list.get(position - 1).getId();
+            loadEmployeesForStore(currentStoreId);
+            updateViewState(s -> {
+                s.selectedStoreId = currentStoreId;
+                s.isStaffEnabled = !s.isPast;
+            });
+        } else {
+            currentStoreId = null;
+            storeEmployees.setValue(new ArrayList<>());
+            updateViewState(s -> {
+                s.selectedStoreId = null;
+                s.isStaffEnabled = false;
+            });
+        }
+    }
+
+    /**
+     * Handles service selection.
+     */
+    public void onServiceSelected(int position) {
+        List<ServiceDTO> list = services.getValue();
+        currentServiceId = (position > 0 && list != null && position <= list.size()) ? list.get(position - 1).getServiceId() : null;
+        updateViewState(s -> s.selectedServiceId = currentServiceId);
+    }
+
+    /**
+     * Handles pet selection.
+     */
+    public void onPetSelected(int position) {
+        List<DropdownDTO> list = customerPets.getValue();
+        currentPetId = (position > 0 && list != null && position <= list.size()) ? list.get(position - 1).getId() : null;
+        updateViewState(s -> s.selectedPetId = currentPetId);
+    }
+
+    /**
+     * Handles staff selection.
+     */
+    public void onStaffSelected(int position) {
+        List<DropdownDTO> list = storeEmployees.getValue();
+        currentStaffId = (position > 0 && list != null && position <= list.size()) ? list.get(position - 1).getId() : null;
+        updateViewState(s -> s.selectedStaffId = currentStaffId);
+    }
+
+    /**
+     * Loads the list of pets for a specific customer.
+     */
+    private void loadPetsForCustomer(Long customerId) {
+        petRepository.getCustomerPets(customerId).observeForever(r -> {
+            if (r.status == Resource.Status.SUCCESS) customerPets.setValue(r.data);
+        });
+    }
+
+    /**
+     * Loads the list of employees for a specific store.
+     */
+    private void loadEmployeesForStore(Long storeId) {
+        storeRepository.getStoreEmployees(storeId).observeForever(r -> {
+            if (r.status == Resource.Status.SUCCESS) storeEmployees.setValue(r.data);
+        });
+    }
+
+    // Appointment Detail CRUD
+
+    /**
+     * Fetches appointment details and populates internal state.
+     */
+    public LiveData<Resource<AppointmentDTO>> loadAppointment() {
+        MutableLiveData<Resource<AppointmentDTO>> result = new MutableLiveData<>();
+        repository.getAppointmentById(appointmentId).observeForever(resource -> {
+            if (resource.status == Resource.Status.SUCCESS && resource.data != null) {
+                AppointmentDTO a = resource.data;
+                currentCustomerId = a.getCustomerId();
+                currentStoreId = a.getStoreId();
+                currentPetId = a.getPetId();
+                currentServiceId = a.getServiceId();
+                currentStaffId = a.getEmployeeId();
+
+                updateViewState(s -> {
+                    s.selectedCustomerId = currentCustomerId;
+                    s.selectedStoreId = currentStoreId;
+                    s.selectedPetId = currentPetId;
+                    s.selectedServiceId = currentServiceId;
+                    s.selectedStaffId = currentStaffId;
+                });
+
+                if (currentCustomerId != null) loadPetsForCustomer(currentCustomerId);
+                if (currentStoreId != null) loadEmployeesForStore(currentStoreId);
+            }
+            result.setValue(resource);
+        });
+        return result;
+    }
+
+    /**
+     * Saves the appointment by building the DTO from tracked state.
+     */
+    public LiveData<Resource<AppointmentDTO>> saveAppointment(String date, String time, String status) {
+        AppointmentDTO dto = new AppointmentDTO(currentCustomerId, currentStoreId, currentServiceId, currentStaffId, date, time, status, currentPetId);
+        if (appointmentId != -1) {
+            return repository.updateAppointment(appointmentId, dto);
+        } else {
+            return repository.createAppointment(dto);
+        }
+    }
+
+    /**
+     * Deletes the current appointment.
+     */
+    public LiveData<Resource<Void>> deleteAppointment() {
+        return repository.deleteAppointment(appointmentId);
+    }
+
+    // UI Logic
+
+    /**
+     * Updates the UI state when date, time, or status changes.
+     */
+    public void onDateOrTimeChanged(String date, String time, String currentStatus) {
+        updateViewState(s -> {
+            s.availableStatuses = calculateAvailableStatuses(s.isEditing, date, time, currentStatus);
+            boolean isPast = DateTimeUtils.isDateTimeInPast(date, time);
+            boolean isCancelled = "Cancelled".equalsIgnoreCase(currentStatus);
+
+            if (isCancelled) {
+                s.isPast = true;
+                setAllFieldsEnabled(s, false);
+                s.isStatusEnabled = false;
+                s.isSaveVisible = false;
+            } else if (isPast) {
+                s.isPast = true;
+                setAllFieldsEnabled(s, false);
+                s.isStatusEnabled = true;
+            } else {
+                s.isPast = false;
+                if (!s.isEditing) {
+                    s.isCustomerEnabled = true;
+                    s.isStoreEnabled = true;
+                    s.isServiceEnabled = true;
+                    s.isPetEnabled = currentCustomerId != null;
+                }
+                s.isDateEnabled = true;
+                s.isTimeEnabled = true;
+                s.isStatusEnabled = true;
+            }
+        });
+    }
+
+    /**
+     * Calculates available appointment statuses based on the current context.
+     */
+    private String[] calculateAvailableStatuses(boolean isEditing, String date, String currentTime, String currentStatus) {
+        if (!isEditing) return new String[]{"Booked"};
+        if (date == null || date.isEmpty()) return new String[]{};
+        if ("Cancelled".equalsIgnoreCase(currentStatus)) return new String[]{"Cancelled"};
+        if (DateTimeUtils.isDateTimeInPast(date, currentTime)) return new String[]{"Completed", "Missed"};
+        return new String[]{"Booked", "Cancelled"};
+    }
+
+    /**
+     * Helper method to enable or disable all fields.
+     */
+    private void setAllFieldsEnabled(ViewState s, boolean enabled) {
+        s.isCustomerEnabled = enabled;
+        s.isStoreEnabled = enabled;
+        s.isPetEnabled = enabled;
+        s.isServiceEnabled = enabled;
+        s.isStaffEnabled = enabled;
+        s.isDateEnabled = enabled;
+        s.isTimeEnabled = enabled;
+    }
+
+    /**
+     * Initializes the UI mode (Create vs Edit).
+     */
+    public void initMode(boolean isEditing) {
+        updateViewState(s -> {
+            s.isEditing = isEditing;
+            s.isDeleteVisible = isEditing;
+            if (isEditing) {
+                s.isCustomerEnabled = false;
+                s.isStoreEnabled = false;
+                s.isPetEnabled = false;
+                s.isServiceEnabled = false;
+            } else {
+                s.isCustomerEnabled = true;
+                s.isStoreEnabled = true;
+                s.isServiceEnabled = true;
+                s.isPetEnabled = false; // until customer selected
+                s.isStaffEnabled = false; // until store selected
+                s.availableStatuses = new String[]{"Booked"};
+            }
+        });
+    }
+
+    /**
+     * Validates if a booking is in the future.
+     */
+    public boolean isValidFutureBooking(String status, String date, String time) {
+        return !"BOOKED".equalsIgnoreCase(status) || !DateTimeUtils.isDateTimeInPast(date, time);
+    }
+
+    /**
+     * Helper to update the view state and notify observers.
+     */
+    private void updateViewState(Action<ViewState> action) {
+        ViewState current = viewState.getValue();
+        if (current != null) {
+            action.run(current);
+            viewState.setValue(current);
+        }
+    }
+
+    private interface Action<T> {
+        void run(T t);
+    }
+
+    /**
+     * A Class to show the states of Appointment Detail Fragment.
+     */
+    public static class ViewState {
+        public boolean isPast = false;
+        public boolean isEditing = false;
+        public boolean isSaveVisible = true;
+        public boolean isDeleteVisible = false;
+        public boolean isCustomerEnabled = true;
+        public boolean isStoreEnabled = true;
+        public boolean isPetEnabled = false;
+        public boolean isServiceEnabled = true;
+        public boolean isStaffEnabled = false;
+        public boolean isDateEnabled = true;
+        public boolean isTimeEnabled = true;
+        public boolean isStatusEnabled = true;
+        public String[] availableStatuses = new String[]{};
+
+        // Selected IDs
+        public Long selectedCustomerId = null;
+        public Long selectedStoreId = null;
+        public Long selectedPetId = null;
+        public Long selectedServiceId = null;
+        public Long selectedStaffId = null;
+    }
+}

android/app/src/main/java/com/example/petstoremobile/viewmodels/AppointmentViewModel.java

@@ -1,23 +1,14 @@
 package com.example.petstoremobile.viewmodels;
 
 import androidx.lifecycle.LiveData;
-import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.ViewModel;
 
 import com.example.petstoremobile.dtos.AppointmentDTO;
 import com.example.petstoremobile.dtos.BulkDeleteRequest;
-import com.example.petstoremobile.dtos.DropdownDTO;
 import com.example.petstoremobile.dtos.PageResponse;
-import com.example.petstoremobile.dtos.ServiceDTO;
-import com.example.petstoremobile.repositories.AppointmentRepository;
-import com.example.petstoremobile.repositories.CustomerRepository;
-import com.example.petstoremobile.repositories.PetRepository;
-import com.example.petstoremobile.repositories.ServiceRepository;
-import com.example.petstoremobile.repositories.StoreRepository;
-import com.example.petstoremobile.utils.DateTimeUtils;
 import com.example.petstoremobile.utils.Resource;
+import com.example.petstoremobile.repositories.AppointmentRepository;
 
-import java.util.ArrayList;
 import java.util.List;
 
 import javax.inject.Inject;
@@ -27,38 +18,10 @@ import dagger.hilt.android.lifecycle.HiltViewModel;
 @HiltViewModel
 public class AppointmentViewModel extends ViewModel {
     private final AppointmentRepository repository;
-    private final CustomerRepository customerRepository;
-    private final StoreRepository storeRepository;
-    private final PetRepository petRepository;
-    private final ServiceRepository serviceRepository;
-
-    private final MutableLiveData<List<DropdownDTO>> customers = new MutableLiveData<>();
-    private final MutableLiveData<List<DropdownDTO>> stores = new MutableLiveData<>();
-    private final MutableLiveData<List<ServiceDTO>> services = new MutableLiveData<>();
-    private final MutableLiveData<List<DropdownDTO>> customerPets = new MutableLiveData<>();
-    private final MutableLiveData<List<DropdownDTO>> storeEmployees = new MutableLiveData<>();
-    
-    private final MutableLiveData<ViewState> viewState = new MutableLiveData<>(new ViewState());
-    
-    private long appointmentId = -1;
-    private Long currentCustomerId;
-    private Long currentStoreId;
-    private Long currentPetId;
-    private Long currentServiceId;
-    private Long currentStaffId;
 
     @Inject
-    public AppointmentViewModel(
-            AppointmentRepository repository,
-            CustomerRepository customerRepository,
-            StoreRepository storeRepository,
-            PetRepository petRepository,
-            ServiceRepository serviceRepository) {
+    public AppointmentViewModel(AppointmentRepository repository) {
         this.repository = repository;
-        this.customerRepository = customerRepository;
-        this.storeRepository = storeRepository;
-        this.petRepository = petRepository;
-        this.serviceRepository = serviceRepository;
     }
 
     // API CRUD
@@ -70,307 +33,10 @@ public class AppointmentViewModel extends ViewModel {
         return repository.getAllAppointments(page, size, query, status, storeId, date, employeeId);
     }
 
-    /**
-     * Retrieves a single appointment by its ID.
-     */
-    public LiveData<Resource<AppointmentDTO>> getAppointmentById(Long id) {
-        return repository.getAppointmentById(id);
-    }
-
-    /**
-     * Creates a new appointment.
-     */
-    public LiveData<Resource<AppointmentDTO>> createAppointment(AppointmentDTO appointment) {
-        return repository.createAppointment(appointment);
-    }
-
-    /**
-     * Updates an existing appointment record by ID.
-     */
-    public LiveData<Resource<AppointmentDTO>> updateAppointment(Long id, AppointmentDTO appointment) {
-        return repository.updateAppointment(id, appointment);
-    }
-
-    /**
-     * Deletes an appointment record by ID.
-     */
-    public LiveData<Resource<Void>> deleteAppointment(Long id) {
-        return repository.deleteAppointment(id);
-    }
-
     /**
      * Deletes multiple appointment records.
      */
     public LiveData<Resource<Void>> bulkDeleteAppointments(List<String> ids) {
         return repository.bulkDeleteAppointments(new BulkDeleteRequest(ids));
     }
-
-    // Initial Data Loading
-
-    /**
-     * Loads initial dropdown data for customers, stores, and services.
-     */
-    public void loadInitialFormData() {
-        customerRepository.getCustomerDropdowns().observeForever(r -> {
-            if (r.status == Resource.Status.SUCCESS) customers.setValue(r.data);
-        });
-        storeRepository.getStoreDropdowns().observeForever(r -> {
-            if (r.status == Resource.Status.SUCCESS) stores.setValue(r.data);
-        });
-        serviceRepository.getAllServices(0, 200, null, "serviceName").observeForever(r -> {
-            if (r.status == Resource.Status.SUCCESS && r.data != null) services.setValue(r.data.getContent());
-        });
-    }
-
-    // LiveData Getters
-
-    public LiveData<List<DropdownDTO>> getCustomers() { return customers; }
-    public LiveData<List<DropdownDTO>> getStores() { return stores; }
-    public LiveData<List<ServiceDTO>> getServices() { return services; }
-    public LiveData<List<DropdownDTO>> getCustomerPets() { return customerPets; }
-    public LiveData<List<DropdownDTO>> getStoreEmployees() { return storeEmployees; }
-    public LiveData<ViewState> getViewState() { return viewState; }
-
-    //State Getters
-
-    public long getAppointmentId() { return appointmentId; }
-
-    /**
-     * Sets the current appointment ID and updates the mode.
-     */
-    public void setAppointmentId(long id) {
-        this.appointmentId = id;
-        initMode(id != -1);
-    }
-
-    // Selection Handlers for spinners
-
-    public void onCustomerSelected(int position) {
-        List<DropdownDTO> list = customers.getValue();
-        if (position > 0 && list != null && position <= list.size()) {
-            currentCustomerId = list.get(position - 1).getId();
-            loadPetsForCustomer(currentCustomerId);
-            updateViewState(s -> {
-                s.selectedCustomerId = currentCustomerId;
-                s.isPetEnabled = !s.isEditing;
-            });
-        } else {
-            currentCustomerId = null;
-            customerPets.setValue(new ArrayList<>());
-            updateViewState(s -> {
-                s.selectedCustomerId = null;
-                s.isPetEnabled = false;
-            });
-        }
-    }
-
-    public void onStoreSelected(int position) {
-        List<DropdownDTO> list = stores.getValue();
-        if (position > 0 && list != null && position <= list.size()) {
-            currentStoreId = list.get(position - 1).getId();
-            loadEmployeesForStore(currentStoreId);
-            updateViewState(s -> {
-                s.selectedStoreId = currentStoreId;
-                s.isStaffEnabled = !s.isPast;
-            });
-        } else {
-            currentStoreId = null;
-            storeEmployees.setValue(new ArrayList<>());
-            updateViewState(s -> {
-                s.selectedStoreId = null;
-                s.isStaffEnabled = false;
-            });
-        }
-    }
-
-    public void onServiceSelected(int position) {
-        List<ServiceDTO> list = services.getValue();
-        currentServiceId = (position > 0 && list != null && position <= list.size()) ? list.get(position - 1).getServiceId() : null;
-        updateViewState(s -> s.selectedServiceId = currentServiceId);
-    }
-
-    public void onPetSelected(int position) {
-        List<DropdownDTO> list = customerPets.getValue();
-        currentPetId = (position > 0 && list != null && position <= list.size()) ? list.get(position - 1).getId() : null;
-        updateViewState(s -> s.selectedPetId = currentPetId);
-    }
-
-    public void onStaffSelected(int position) {
-        List<DropdownDTO> list = storeEmployees.getValue();
-        currentStaffId = (position > 0 && list != null && position <= list.size()) ? list.get(position - 1).getId() : null;
-        updateViewState(s -> s.selectedStaffId = currentStaffId);
-    }
-
-    private void loadPetsForCustomer(Long customerId) {
-        petRepository.getCustomerPets(customerId).observeForever(r -> {
-            if (r.status == Resource.Status.SUCCESS) customerPets.setValue(r.data);
-        });
-    }
-
-    private void loadEmployeesForStore(Long storeId) {
-        storeRepository.getStoreEmployees(storeId).observeForever(r -> {
-            if (r.status == Resource.Status.SUCCESS) storeEmployees.setValue(r.data);
-        });
-    }
-
-    // Appointment Detail CRUD
-
-    /**
-     * Fetches appointment details and populates internal state.
-     */
-    public LiveData<Resource<AppointmentDTO>> loadAppointment() {
-        MutableLiveData<Resource<AppointmentDTO>> result = new MutableLiveData<>();
-        repository.getAppointmentById(appointmentId).observeForever(resource -> {
-            if (resource.status == Resource.Status.SUCCESS && resource.data != null) {
-                AppointmentDTO a = resource.data;
-                currentCustomerId = a.getCustomerId();
-                currentStoreId = a.getStoreId();
-                currentPetId = a.getPetId();
-                currentServiceId = a.getServiceId();
-                currentStaffId = a.getEmployeeId();
-                
-                updateViewState(s -> {
-                    s.selectedCustomerId = currentCustomerId;
-                    s.selectedStoreId = currentStoreId;
-                    s.selectedPetId = currentPetId;
-                    s.selectedServiceId = currentServiceId;
-                    s.selectedStaffId = currentStaffId;
-                });
-
-                if (currentCustomerId != null) loadPetsForCustomer(currentCustomerId);
-                if (currentStoreId != null) loadEmployeesForStore(currentStoreId);
-            }
-            result.setValue(resource);
-        });
-        return result;
-    }
-
-    /**
-     * Saves the appointment by building the DTO from tracked state.
-     */
-    public LiveData<Resource<AppointmentDTO>> saveAppointment(String date, String time, String status) {
-        AppointmentDTO dto = new AppointmentDTO(currentCustomerId, currentStoreId, currentServiceId, currentStaffId, date, time, status, currentPetId);
-        if (appointmentId != -1) {
-            return repository.updateAppointment(appointmentId, dto);
-        } else {
-            return repository.createAppointment(dto);
-        }
-    }
-
-    /**
-     * Deletes the current appointment.
-     */
-    public LiveData<Resource<Void>> deleteAppointment() {
-        return repository.deleteAppointment(appointmentId);
-    }
-
-    // --- UI Logic ---
-
-    public void onDateOrTimeChanged(String date, String time, String currentStatus) {
-        updateViewState(s -> {
-            s.availableStatuses = calculateAvailableStatuses(s.isEditing, date, time, currentStatus);
-            boolean isPast = DateTimeUtils.isDateTimeInPast(date, time);
-            boolean isCancelled = "Cancelled".equalsIgnoreCase(currentStatus);
-
-            if (isCancelled) {
-                s.isPast = true;
-                setAllFieldsEnabled(s, false);
-                s.isStatusEnabled = false;
-                s.isSaveVisible = false;
-            } else if (isPast) {
-                s.isPast = true;
-                setAllFieldsEnabled(s, false);
-                s.isStatusEnabled = true;
-            } else {
-                s.isPast = false;
-                if (!s.isEditing) {
-                    s.isCustomerEnabled = true;
-                    s.isStoreEnabled = true;
-                    s.isServiceEnabled = true;
-                    s.isPetEnabled = currentCustomerId != null;
-                }
-                s.isDateEnabled = true;
-                s.isTimeEnabled = true;
-                s.isStatusEnabled = true;
-            }
-        });
-    }
-
-    private String[] calculateAvailableStatuses(boolean isEditing, String date, String currentTime, String currentStatus) {
-        if (!isEditing) return new String[]{"Booked"};
-        if (date == null || date.isEmpty()) return new String[]{};
-        if ("Cancelled".equalsIgnoreCase(currentStatus)) return new String[]{"Cancelled"};
-        if (DateTimeUtils.isDateTimeInPast(date, currentTime)) return new String[]{"Completed", "Missed"};
-        return new String[]{"Booked", "Cancelled"};
-    }
-
-    private void setAllFieldsEnabled(ViewState s, boolean enabled) {
-        s.isCustomerEnabled = enabled;
-        s.isStoreEnabled = enabled;
-        s.isPetEnabled = enabled;
-        s.isServiceEnabled = enabled;
-        s.isStaffEnabled = enabled;
-        s.isDateEnabled = enabled;
-        s.isTimeEnabled = enabled;
-    }
-
-    public void initMode(boolean isEditing) {
-        updateViewState(s -> {
-            s.isEditing = isEditing;
-            s.isDeleteVisible = isEditing;
-            if (isEditing) {
-                s.isCustomerEnabled = false;
-                s.isStoreEnabled = false;
-                s.isPetEnabled = false;
-                s.isServiceEnabled = false;
-            } else {
-                s.isCustomerEnabled = true;
-                s.isStoreEnabled = true;
-                s.isServiceEnabled = true;
-                s.isPetEnabled = false; // until customer selected
-                s.isStaffEnabled = false; // until store selected
-                s.availableStatuses = new String[]{"Booked"};
-            }
-        });
-    }
-
-    public boolean isValidFutureBooking(String status, String date, String time) {
-        return !"BOOKED".equalsIgnoreCase(status) || !DateTimeUtils.isDateTimeInPast(date, time);
-    }
-
-    private void updateViewState(Action<ViewState> action) {
-        ViewState current = viewState.getValue();
-        if (current != null) {
-            action.run(current);
-            viewState.setValue(current);
-        }
-    }
-
-    private interface Action<T> { void run(T t); }
-
-    /**
-     * A Class to show the states of Appointment Detail Fragment.
-     */
-    public static class ViewState {
-        public boolean isPast = false;
-        public boolean isEditing = false;
-        public boolean isSaveVisible = true;
-        public boolean isDeleteVisible = false;
-        public boolean isCustomerEnabled = true;
-        public boolean isStoreEnabled = true;
-        public boolean isPetEnabled = false;
-        public boolean isServiceEnabled = true;
-        public boolean isStaffEnabled = false;
-        public boolean isDateEnabled = true;
-        public boolean isTimeEnabled = true;
-        public boolean isStatusEnabled = true;
-        public String[] availableStatuses = new String[]{};
-
-        // Selected IDs
-        public Long selectedCustomerId = null;
-        public Long selectedStoreId = null;
-        public Long selectedPetId = null;
-        public Long selectedServiceId = null;
-        public Long selectedStaffId = null;
-    }
 }