inituser.service.ts

import { Network } from '@ionic-native/network/ngx';
import { AlertController, Platform } from '@ionic/angular';

export class InitUserProvider {

  disconnectSubscription: any;
  connectSubscription: any;
  networkStatus = true;

  constructor(private network: Network, private platform: Platform) {
    this.platform.ready().then(() => {
      this.checkInternetConnection();
    });
  }

checkInternetConnection() {
  this.disconnectSubscription = this.network.onDisconnect().subscribe(async () => {
      this.networkStatus = false;
    });
    this.connectSubscription = this.network.onConnect().subscribe(() => {
      this.networkStatus = true;
    });
}

async load() {
    if (this.networkStatus) {
    // We have the Internet, so we can fetch the users data from the server
      const onlineUser = await this.api.getUserFromServer(this.userid);
      this.api.setLoggedInUser(onlineUser);
    } else {
      const localUser = await this.data.getStoredUserData();
      this.api.setLoggedInUser(localUser);
    }
  }
}