expoPushNotifications.js

import * as Device from 'expo-device';
import * as Notifications from 'expo-notifications';
import { Platform } from 'react-native';
import Constants from 'expo-constants';
import { auth, db } from './firebaseConfig';
import { doc, updateDoc } from 'firebase/firestore';

Notifications.setNotificationHandler({
  handleNotification: async () => ({
    shouldShowAlert: true,
    shouldPlaySound: true,
    shouldSetBadge: false,
  }),
});

export async function registerForPushNotificationsAsync() {
  let token;
  if (Device.isDevice) {
    const { status: existingStatus } = await Notifications.getPermissionsAsync();
    let finalStatus = existingStatus;
    if (existingStatus !== 'granted') {
      const { status } = await Notifications.requestPermissionsAsync();
      finalStatus = status;
    }
    if (finalStatus !== 'granted') {
      // alert('Failed to get push token for push notification!');
      return;
    }
    token = (await Notifications.getExpoPushTokenAsync({"projectId":Constants.expoConfig.extra.eas.projectId})).data;
    // console.log("Expo push token:", token);
  } else {
    alert('Must use physical device for Push Notifications');
  }

  if (Platform.OS === 'android') {
    Notifications.setNotificationChannelAsync('default', {
      name: 'default',
      importance: Notifications.AndroidImportance.MAX,
      vibrationPattern: [0, 250, 250, 250],
      lightColor: '#FF231F7C',
    });
  }
  // await updateDoc(doc(db, "users", auth.currentUser.uid), { notifToken: notifToken }, { merge: true });

  return token;
}