New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
});

router.js

import EmberRouter from '@ember/routing/router';
import config from './config/environment';

const Router = EmberRouter.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('parent', function() {
    this.route('child');
  });
});

export default Router;

routes.application.js

import Ember from 'ember';
import { lix } from '../utils/lix';

export default Ember.Route.extend({
  lix: lix(['a']),
  appName: 'Ember Twiddle',
  init() {
    this._super(...arguments);
    console.log(this.lix.treatment('a'));
  },
});

routes.index.js

import Ember from 'ember';
import { lix } from '../utils/lix';


export default Ember.Route.extend({
  lix: lix(['a']),
  appName: 'Ember Twiddle',
  init() {
    this._super(...arguments);
    console.log(this.lix.treatment('a'));
  },
});

routes.parent.child.js

import Ember from 'ember';
import { lix } from '../../utils/lix'; 

export default Ember.Route.extend({
  lix: lix(['b']),
  appName: 'Ember Twiddle',
  init() {
    this._super(...arguments);
    console.log(this.lix.treatment('a'));
  },
});

routes.parent.js

import Ember from 'ember';
import { lix } from '../utils/lix';

export default Ember.Route.extend({
  lix: lix(['a', 'b']),
  appName: 'Ember Twiddle',
  init() {
    this._super(...arguments);
    console.log(this.lix.treatment('a'));
  
      console.log(this.lix.treatment('b'));
  },
});

services.lix.js

import Ember from 'ember';

const routeToKeys = new WeakMap();

export default Ember.Service.extend({
  init() {
    this._super(...arguments);
    this.out = new Map();
    this._lixes = {
      a: true,
      b: false,
      foo: 'bar'
    };
    
    setInterval(() => {
      this.set('_lixes', {
        a: !this._lixes.a,
        b: !this._lixes.b,
        foo: !this._lixes.a ? 'foo' : 'bar'
      })
    }, 1000)
  },
  
  isConsumed(key) {
    return this.out.has(key)
  },
  
  createSnapShotForRoute(route) {
    let lix = this;
  	return new class {
      treatment(key) {
        let keys = routeToKeys.get(route);
        
        if (lix.isConsumed(key)) {
          console.log('consumed')
          return lix.out.get(key);
        }
        
        if (keys.indexOf(key) > -1) {
           let value = lix._lixes[key];
           lix.out.set(key, value);
           return value;    
        } else {
          throw new Error(`Lix Key was not defined in the ${route.name} route`);     
        }
      }
    }
  },
  
  register(route, keys) {
    routeToKeys.set(route, keys);
    
    let snapshot = this.createSnapShotForRoute(route);
    route.on('deactivate', () => {
      keys.forEach(key => {
        if (this.out.has(key)) {
          this.out.delete(key);
        }
      })
    });
		
    return snapshot;
  },
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
{{#link-to 'parent.child'}}To Child{{/link-to}}
<br>
<br>

templates.index.hbs

<h2>Index</h2>

templates.parent.child.hbs

Child

templates.parent.hbs

<h1>Parent</h1>
{{outlet}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}

utils.lix.js

import { defineProperty, computed } from '@ember/object';

export function lix(keys) {

  return computed({
    get(key) {
      let service = Ember.getOwner(this).lookup('service:lix');
      let snapshot = service.register(this, keys);
      return snapshot
    }
  })
}