kia-ml/src/models/root-store/setup-root-store.js

Kia

import { onSnapshot } from 'mobx-state-tree';
import { RootStoreModel } from './root-store';
import { Environment } from '../environment';
import * as storage from '../../utils/storage';

/**
 * The key we'll be saving our state as within async storage.
 */
const ROOT_STATE_STORAGE_KEY = 'root';
/**
 * Setup the environment that all the models will be sharing.
 *
 * The environment includes other functions that will be picked from some
 * of the models that get created later. This is how we loosly couple things
 * like events between models.
 */

export async function createEnvironment(apiConfig) {
  const env = new Environment();
  await env.setup(apiConfig);
  return env;
}
/**
 * Setup the root state.
 */

export async function setupRootStore(apiConfig) {
  let rootStore;
  let data; // prepare the environment that will be associated with the RootStore.

  const env = await createEnvironment(apiConfig);

  try {
    // load data from storage
    data = (await storage.load(ROOT_STATE_STORAGE_KEY)) || {};
    rootStore = RootStoreModel.create(data, env);
  } catch (e) {
    // if there's any problems loading, then let's at least fallback to an empty state
    // instead of crashing.
    rootStore = RootStoreModel.create({}, env); // but please inform us what happened

    __DEV__ && console.log(e.message, null);
  } //   // reactotron logging
  //   if (__DEV__) {
  //     env.reactotron.setRootStore(rootStore, data)
  //   }
  // track changes & save to storage


  onSnapshot(rootStore, snapshot => storage.save(ROOT_STATE_STORAGE_KEY, snapshot));
  return rootStore;
}
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