New Twiddle

application.controller.js

import Ember from 'ember';

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

application.template.hbs

<h1>Parent</h1>
{{#my-parent as |notifyChange|}}
	<b>There must be a 't' in the inputs to be valid</b><br>
  {{my-child notify=(action notifyChange 'path-a')}}<br>
  {{my-child notify=(action notifyChange 'path-b')}}
{{/my-parent}}

my-child.component.js

import Ember from 'ember';

export default Ember.TextField.extend({
  keyUp() {
    var value = this.get('value');
    var notify = this.getAttr('notify');
    var isValid = this.validate(value);
    debugger
    notify(value, isValid);
  },
  
  validate(value) {
    return value.indexOf('t') > -1;
  }
});

my-child.template.hbs

{{yield}}

my-parent.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  buffer: null,
  bufferJSON: '',
  
  notify(path, value, isValid) {
    var buffer = this.get('buffer');
    this.set('buffer.'+path, {isValid, value});
    this.set('bufferJSON', JSON.stringify(buffer));
    this.set('notValid', !this.checkIsValid(buffer));
  },
  
  checkIsValid(buffer) {
    return Object.keys(buffer).every(key => {
      return buffer[key].isValid;
    });
  },
  
  flushBuffer() {
    var buffer = this.get('buffer');
    this.set('buffer', {});
    Object.keys(buffer).forEach(key => {
      // Do something here to add/update this
      // item in the array.
  	});
  },
  
  notValid: true,
  
  init() {
    this._super();
    this.set('buffer', {});
  },
  
  actions: {
    save() {
      this.flushBuffer();
    }
  }
});

my-parent.template.hbs

{{yield (action notify)}}
<br>
{{bufferJSON}}
<br>
<button disabled={{notValid}}>Save</button>

twiddle.json

{
  "version": "0.4.16",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.1.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember-template-compiler.js"
  }
}