application.js

import Route from '@ember/routing/route';
import { inject as service } from '@ember/service';
import config from 'labs-zola/config/environment';

const { defaultLayerGroupState } = config;

export default Route.extend({
  mainMap: service(),
  fastboot: service(),
  router: service(),
  store: service(),

  beforeModel(transition) {
    const { targetName } = transition;

    // only transition to about if target is index
    if (targetName === 'index') {
      // TODO: handle hash in fastboot
      if (!this.fastboot.isFastBoot) {
        const { hash } = window.location;

        // preserve hash token so it's applied across transitions
        if (hash) {
          this.mainMap.set('knownHashIntent', hash);
        }
      }

      this.router.transitionTo(`/about${transition.intent.url}`);
    }

    if (
      targetName === 'map-feature.lot' ||
      targetName === 'map-feature.lot-comparison'
    ) {
      this.set('mainMap.routeIntentIsNested', true);
    }
  },

  async model() {
    const { layerGroups: layerGroupsParams } = this.paramsFor('application');

    // fetch layer groups based on configured environment variable
    const layerGroups = await this.store.query('layer-group', {
      'layer-groups': defaultLayerGroupState,
    });

    // get the params and override the layer group state up-front
    layerGroups.forEach((group) => {
      group.set('visible', layerGroupsParams.includes(group.id));
    });

    // extract the meta node, see ember-data & json:api
    const { meta } = layerGroups;

    // pass down a hash representation of the layer group ids
    const layerGroupsObject = layerGroups.reduce((accumulator, current) => {
      accumulator[current.get('id')] = current;
      return accumulator;
    }, {});
    const bookmarks = await this.store.findAll('bookmark');

    await bookmarks.invoke('get', 'bookmark');

    const savedLayerSets = window.localStorage['saved-layer-sets']
      ? JSON.parse(window.localStorage['saved-layer-sets'])
      : [];

    return {
      layerGroups,
      layerGroupsObject,
      meta,
      bookmarks,
      savedLayerSets,
    };
  },
});