app/services/states.js

states.js

import Ember from 'ember';

export default Ember.Service.extend(Ember.PromiseProxyMixin, {

  store: Ember.inject.service(),

  query(limit, offset) {
    return this.get('store').query('state', {
      include: 'country,region',
      page: {
        limit: limit,
        offset: offset
      }
    });
  },

  load: Ember.on('init', function() {
    var loadedCount = 0;
    const limit = 100;
    var offset = 0;
    const queries = [];

    this.set('promise', new Promise((resolve) => {
      this.query(limit, offset).then((states) => {
        loadedCount += states.get('length');
        const totalRemaining = states.get('meta.record-count') - loadedCount;
        const totalPagesRemaining = totalRemaining / limit;
        var n = 0;
        const promises = [];
        while (n < totalPagesRemaining) {
          n += 1;
          promises.pushObject(this.query(limit, limit * n));
        }
        Ember.RSVP.all(promises).then(()=> {
          resolve(this.get('store').peekAll('state'));
        });
      });
    }));
  })
});