client.js

import { Permissions, Notifications } from 'expo';
import { Platform } from 'react-native';

import client from '../state/apollo';

import mutation from '../graphql/mutations/userAddPushToken';

import Observable from './observable';

export const register = async () => {

  console.log('requesting push notification permissions');

  const { status } = await Permissions.askAsync(Permissions.REMOTE_NOTIFICATIONS);

  console.log(`push notification permissions: ${status}`);

  if (status !== 'granted') {
    return;
  }

  console.log('fetching push notifications token');

  const token = await Notifications.getExponentPushTokenAsync();

  console.log(`push notifications token: ${token}`);

  const variables = {
    input: {
      token
    }
  };

  console.log('flushing push notification token to server');

  const { data: { user } } = await client.mutate({
    mutation,
    variables
  });

  console.log(`push notification token for user ${user.id} persisted on server`);

  return user;
};

export const dismiss = id => Platform.OS === 'ios' ? Promise.resolve(id) : Notifications.dismissNotificationAsync(id);

export const observable = new Observable();

observable.subscribe(({ data }) => console.log(`received push notification with data ${JSON.stringify(data)}`));

Notifications.addListener(notification => {
  console.log(notification);
  observable.onNext(notification);
});

client.log

[exp] push notification permissions: granted
[exp] fetching push notifications token
[exp] push notifications token: ExponentPushToken[o4YLaOLeN9AjeKqEjlNob8]
[exp] flushing push notification token "ExponentPushToken[o4YLaOLeN9AjeKqEjlNob8]" to server
[exp] push notification token for user 15d04461-14ba-4770-86db-c8d0565cf010 persisted on server

connector.js

import Promise from 'bluebird';
import { inject } from 'injectorator';
import _ from 'underscore';
import Expo from 'exponent-server-sdk';

import BaseConnector from './base';

const expo = new Expo();

@inject({
  expo: () => expo,
  Promise: () => Promise
})
export default class ExpoConnector extends BaseConnector {
  constructor (
    { expo, Promise }
  ) {
    super();

    this._expo = expo;

    this._Promise = Promise;
  }

  async sendPushNotifications(notifications = []) {
    notifications = notifications
      .filter(n => !!n)
      .map(({
        pushToken,
        playSound,
        title,
        body,
        data,
        ttl,
        expiration,
        priority
      }) => ({
        to: pushToken,
        sound: !!Boolean(playSound) ? 'default' : null,
        title: title || null,
        body: body || null,
        data: data || {},
        ttl: ttl || 0,
        expiration: expiration || undefined,
        priority: priority || 'normal'
      }))
      .filter(({ to, body }) => !!to && !!body)

    const receipts = await this._expo.sendPushNotificationsAsync(notifications);

    console.log(receipts);
  }

  sendPushNotification(notification) {
    return this.sendPushNotifications([ notification ]);
  }
}

model-method.js

  async addPushToken (user, token, transactionContext) {
    const transaction = transactionContext ? transactionContext.transaction : null;

    user = this.isInstance(user) ? user : await this.findById(user.id || user, transactionContext);

    log('adding push token "%s" for user "%s"', token, user.id);

    await user.update({
      pushTokens: [
        ...user.pushTokens,
        token
      ]
    }, {
      transaction
    });

    await user.save({
      transaction
    });

    log('added push token "%s" for user "%s": %O', token, user.id, user.pushTokens);

    log('sending initial push notification to user "%s"', user.id);

    setTimeout(() => {
      this._expoConnector.sendPushNotification({
        pushToken: token,
        title: 'Welcome to Boost',
        body: 'Thanks for joining Boost!  We look forward to helping you with your career. :)',
        data: {
          userId: user.id
        }
      });
    }, 5000);

    return user;
  }

server.log

[1] Fri, 12 May 2017 23:35:52 GMT graphql:models:user adding push token "ExponentPushToken[o4YLaOLeN9AjeKqEjlNob8]" for user "15d04461-14ba-4770-86db-c8d0565cf010"
[1] Fri, 12 May 2017 23:35:52 GMT graphql:models:user added push token "ExponentPushToken[o4YLaOLeN9AjeKqEjlNob8]" for user "15d04461-14ba-4770-86db-c8d0565cf010": [ 'ExponentPushToken[7g2bg7HtFL4LXsRI-HZgpe]',
[1]   'ExponentPushToken[NT6ktiOvwt63o8SHOX4sYg]',
[1]   'ExponentPushToken[s2RFpGFYOZ9Vh9O5-yrv7r]',
[1]   'ExponentPushToken[F4kc6_MODNiLfP7gEHkyZb]',
[1]   'ExponentPushToken[ooMroRDxMvvGAD-q6bBv1O]',
[1]   'ExponentPushToken[MvnrUTGVWkIcwAoxBlgApj]',
[1]   'ExponentPushToken[sNmGiBPXm5KJYvHZGYwLiy]',
[1]   'ExponentPushToken[gz-9hcAFu678NRrgjZHE85]',
[1]   'ExponentPushToken[_XDmxpOqBAOwr2Vmsmfz9A]',
[1]   'ExponentPushToken[xSwZ4sNq6v39KdE1_TD-DP]',
[1]   'ExponentPushToken[xSwZ4sNq6v39KdE1_TD-DP]',
[1]   'ExponentPushToken[o4YLaOLeN9AjeKqEjlNob8]' ]
[1] Fri, 12 May 2017 23:35:52 GMT graphql:models:user sending initial push notification to user "15d04461-14ba-4770-86db-c8d0565cf010"
[1] Fri, 12 May 2017 23:35:52 GMT graphql:middleware:context request finished for user 15d04461-14ba-4770-86db-c8d0565cf010 - 55 ms
[1] [
[1]   {
[1]     "to": "ExponentPushToken[o4YLaOLeN9AjeKqEjlNob8]",
[1]     "sound": "default",
[1]     "title": "Welcome to Boost",
[1]     "body": "Thanks for joining Boost!  We look forward to helping you with your career. :)",
[1]     "data": {
[1]       "userId": "15d04461-14ba-4770-86db-c8d0565cf010"
[1]     },
[1]     "ttl": 0,
[1]     "priority": "normal"
[1]   }
[1] ]
[1] [ { status: 'ok' } ]