app_expo/models/environment.ts


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import { Api } from '../services/api'

let ReactotronDev
if (__DEV__) {
  const { Reactotron } = require('../services/reactotron')
  ReactotronDev = Reactotron
}

/**
 * The environment is a place where services and shared dependencies between
 * models live.  They are made available to every model via dependency injection.
 */
export class Environment {
  constructor() {
    // create each service
    if (__DEV__) {
      // dev-only services
      this.reactotron = new ReactotronDev()
    }
    this.api = new Api()
  }

  async setup() {
    // allow each service to setup
    if (__DEV__) {
      await this.reactotron.setup()
    }
    await this.api.setup()
  }

  /**
   * Reactotron is only available in dev.
   */
  reactotron: typeof ReactotronDev

  /**
   * Our api.
   */
  api: Api
}