service-template.js

import BaseService from 'base-service';
import fetchJSON from 'fetch-json';

const _private = {
  // Immutable properties.
  manufacturer: Symbol('manufacturer'),
  model: Symbol('model'),

  // Mutable states.
  state: Symbol('state')
};

export default class Service extends BaseService {
  constructor(props, state) {
    super(props);

    // Immutable properties.
    this[_private.manufacturer] = props.manufacturer;
    this[_private.model] = props.model;

    // Mutable states.
    this[_private.state] = {
      on: state.on
    };
  }

  get manufacturer() {
    return this[_private.manufacturer];
  }

  get model() {
    return this[_private.model];
  }

  turnOn(value = false) {
    fetchJSON(`/service/${this.id}/state`, { on: value })
      .then(() => {
        this[_private.state].on = value;

        return value;
      });
  }
}