reserveformJAVA(no photo attachment)

package com.example.gypsy;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.app.DatePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.NumberPicker;
import android.widget.Spinner;
import android.widget.Toast;

import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;

import java.util.Calendar;
import java.util.List;

public class ReserveForm extends AppCompatActivity {

    private EditText fullNameEditText;
    private EditText contactNumberEditText;
    private EditText emailEditText;
    private EditText reservationDateEditText;
    private EditText yourGcashNameResto;
    private EditText yourGcashNumberResto;
    private EditText referenceNumberResto;
    private DatabaseReference databaseReference;
    private Button submitButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_reserve_form);

        Intent intent = getIntent();
        String restoId = intent.getStringExtra("restoKey");
        Log.d("ReserveFormActivity", "restoId: " + restoId);

        fullNameEditText = findViewById(R.id.fullNameEditText);
        contactNumberEditText = findViewById(R.id.contactNumberEditText);
        emailEditText = findViewById(R.id.emailEditText);
        reservationDateEditText = findViewById(R.id.reservationDateEditText);
        yourGcashNameResto = findViewById(R.id.yourGcashNameResto);
        yourGcashNumberResto = findViewById(R.id.yourGcashNumberResto);
        referenceNumberResto = findViewById(R.id.referenceNumberResto);
        submitButton = findViewById(R.id.submitButton);
        databaseReference = FirebaseDatabase.getInstance().getReference();
        NumberPicker customersNumberPicker = findViewById(R.id.customersNumberPicker);
        customersNumberPicker.setMinValue(0);
        customersNumberPicker.setMaxValue(10);

        reservationDateEditText.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDatePickerDialog(reservationDateEditText);
            }
        });

        submitButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (areAllFieldsFilled()) {
                    FirebaseUser currentUser = FirebaseAuth.getInstance().getCurrentUser();
                    if (currentUser != null) {

                        String userId = currentUser.getUid();
                        String fullName = fullNameEditText.getText().toString();
                        String contactNumber = contactNumberEditText.getText().toString();
                        String email = emailEditText.getText().toString();
                        int customers = customersNumberPicker.getValue();

                        save(userId, restoId, fullName, contactNumber, email, customers,
                             yourGcashNameResto.getText().toString(), yourGcashNumberResto.getText().toString(),
                             referenceNumberResto.getText().toString());

                        Toast.makeText(ReserveForm.this, "Reservation submitted.", Toast.LENGTH_SHORT).show();

                    } else {
                        Log.e("ReserveForm", "User is not authenticated");
                    }
                } else {
                    Toast.makeText(ReserveForm.this, "All fields are required.", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }

    private void save(String userId, String restoId, String fullName, String contactNumber, String email, int customers,
                      String gcashNameResto, String gcashNumberResto, String referenceNumberResto) {
        FirebaseUser currentUser = FirebaseAuth.getInstance().getCurrentUser();

        if (currentUser != null) {
            String userType = "Tourist";
            String userPath = "users/" + userType + "/" + currentUser.getUid() + "/name";
            DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference();
            DatabaseReference userRef = databaseReference.child(userPath);
            userRef.addListenerForSingleValueEvent(new ValueEventListener() {
                @Override
                public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                    Log.d("ReserveForm", "onDataChange called");
                    if (dataSnapshot.exists()) {
                        String userName = dataSnapshot.getValue(String.class);
                        Log.d("ReserveForm", "Name retrieved: " + userName);

                        DatabaseReference restaurantRef = databaseReference.child("restaurants").child(restoId).child("user_id");
                        Log.d("BookForm", "restaurantref: " + restaurantRef);
                        restaurantRef.addListenerForSingleValueEvent(new ValueEventListener() {
                            @Override
                            public void onDataChange(@NonNull DataSnapshot restaurantDataSnapshot) {
                                if (restaurantDataSnapshot.exists()) {
                                    String restoUserId = restaurantDataSnapshot.getValue(String.class);
                                    Log.d("ReserveForm", "restoUserId: " + restoUserId);

                                    DatabaseReference reservationsRef = databaseReference.child("reservation_info").push();
                                    String reservationId = reservationsRef.getKey();

                                    reservationsRef.child("fullName").setValue(fullName);
                                    reservationsRef.child("contactNumber").setValue(contactNumber);
                                    reservationsRef.child("email").setValue(email);
                                    reservationsRef.child("customers").setValue(customers);
                                    reservationsRef.child("userName").setValue(userName);
                                    reservationsRef.child("restoUserId").setValue(restoUserId);
                                    reservationsRef.child("gcashNameResto").setValue(gcashNameResto);
                                    reservationsRef.child("gcashNumberResto").setValue(gcashNumberResto);
                                    reservationsRef.child("referenceNumberResto").setValue(referenceNumberResto);

                                    Log.d("ReservationForm", "Booking data saved");
                                }
                            }

                            @Override
                            public void onCancelled(@NonNull DatabaseError databaseError) {
                                Log.e("BookForm", "Database error: " + databaseError.getMessage());
                            }
                        });
                    } else {
                        Log.e("BookForm", "User is not authenticated");
                    }
                }

                @Override
                public void onCancelled(@NonNull DatabaseError databaseError) {
                    Log.e("BookForm", "Database error: " + databaseError.getMessage());
                }
            });
        } else {
            Log.e("BookForm", "User is not authenticated");
        }
    }

    private void showDatePickerDialog(final EditText editText) {
        final Calendar calendar = Calendar.getInstance();
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);

        DatePickerDialog datePickerDialog = new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {
            @Override
            public void onDateSet(android.widget.DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                String selectedDate = (monthOfYear + 1) + "/" + dayOfMonth + "/" + year;
                editText.setText(selectedDate);
            }
        }, year, month, dayOfMonth);

        datePickerDialog.show();
    }

    private boolean areAllFieldsFilled() {
    return !fullNameEditText.getText().toString().isEmpty() &&
            !contactNumberEditText.getText().toString().isEmpty() &&
            !emailEditText.getText().toString().isEmpty() &&
            !reservationDateEditText.getText().toString().isEmpty() &&
            !yourGcashNameResto.getText().toString().isEmpty() &&
            !yourGcashNumberResto.getText().toString().isEmpty() &&
            !referenceNumberResto.getText().toString().isEmpty();
    }
}