Build WordPress Client App with React Native #26 : Manage device token

This series intends to show how I build app to serve content from my WordPress blog by using react native. Since, my blog is talking about react-native, the series and the articles are interconnected. We will learn how to set-up many packages that make our lives comfortable and learn how to deal with WordPress APIs. Here, the most prominent features talked about in the book are the dark theme , offline mode, infinite scroll and many more. You can discover much more in this series.this inspiration to do this tutorial series came from the React Native App Templates from instamobile

In case of wanting to learn from the beginning, all the previous parts for this tutorial series are available below:

now we will get device token and store on Firebase realtime database for Android side we can get token without asking again but on iOS, we need to do again then we store a token on AsyncStorage that help us didn’t store duplicate token

we do onApp.js start by import two main package Firebase and AsyncStorage

import firebase from 'react-native-firebase';
import AsyncStorage from '@react-native-community/async-storage';

Check device permission

first, we start check permission on a device if they default already accept like on Android we start to get token if we get denied we will request permission again

create new async function name checkPermission

async checkPermission() {
    firebase
      .messaging()
      .hasPermission()
      .then(enabled => {
        if (enabled) {
          // user has permissions
          console.log('permissions accept');
          this.getToken();
        } else {
          // user doesn't have permission
          console.log('permissions reject');
          this.requestPermission();
        }
      });
  }

next, create a function for send request

async requestPermission() {
    firebase
      .messaging()
      .requestPermission()
      .then(() => {
        // User has authorised
        console.log('permissions accept in requestPermission');
        this.getToken();
      })
      .catch(error => {
        // User has rejected permissions
        console.log('permission rejected');
      });
  }

if user authorize we lunch getToken function

next, create getToken function and paste code below

async getToken() {
    let fcmToken = await AsyncStorage.getItem('fcmToken');

    console.log('before fcmToken: ', fcmToken);
    if (!fcmToken) {
      fcmToken = await firebase.messaging().getToken();
      if (fcmToken) {
        try {
          await firebase
            .database()
            .ref('devices_token/')
            .push({fcmToken: fcmToken, platforms: Platform.OS})
            .then(res => res.json())
            .then(res => {
              console.log(res);
            })
            .catch(err => {
              console.log(err);
            });
          await AsyncStorage.setItem('fcmToken');
        } catch (error) {
          // User has rejected permissions
          console.log(error);
        }
        console.log('after fcmToken: ', fcmToken);
        await AsyncStorage.setItem('fcmToken', fcmToken);
      }
    }
  }

this function work pretty simple first check token already in-store on AsyncStorage or ? if not found we get token and save on realtime database

now we set all done let try

now we hit allow and your will saw token will add to a realtime database

Summary

now we can get and set device token for using in push notification

Also published on Medium.