New Twiddle

components.signatory-select-list.js

import Ember from 'ember';

export default Ember.Component.extend({
 	init() {
    this._super();
  },
   
  filteredSignatories: Ember.computed('signatories.[]', function() {
    return this.get('signatories').map((signatory) => {
    	var signatory = Ember.ObjectProxy.create({content: signatory});
      signatory.set('isOpen', true);
      return signatory;
    });
  }),
   
  actions: {
    toggleDetail() {
      this.get('filteredSignatories').setEach('isOpen', false);
    },
    
    toggleIsOpen(signatory) {
      console.log(signatory);
    }
  }
});

components.signatory-select-row.js

import Ember from 'ember';

export default Ember.Component.extend({
  isOpen: Ember.computed.oneWay('signatory.isOpen'),
  
  actions: {
    toggleDetail(signatory) {
      console.log(this)
      var signatory = this.get('signatory');
      this.get('toggleIsOpen')(signatory);
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  signatories: [
    Ember.Object.create({name: 'John', dob: 1993}),
    Ember.Object.create({name: 'Susan', dob: 1977}),
    Ember.Object.create({name: 'Frank', dob: 1958})
  ]
});

templates.application.hbs

<h1>Signatory List</h1>


{{#signatory-select-list signatories=signatories as |list|}}

  {{#each list.signatories as |signatory|}}
	  {{list.row signatory=signatory}}
  {{/each}}

{{/signatory-select-list}}

templates.components.signatory-select-list.hbs

<h2>Signatory List</h2>

<ul>
  <li><button {{action 'toggleDetail' on='click'}}>Toggle All Detail</button></li>
</ul>

{{yield (hash
  row=(component 'signatory-select-row')
  signatories=filteredSignatories
  toggleIsOpen=(action 'toggleIsOpen')
)}}

templates.components.signatory-select-row.hbs

<div class="row">
  {{signatory.name}} [<a href="#" {{action 'toggleIsOpen' signatory}}>...</a>]
  {{#if isOpen}}
   - born {{signatory.dob}}
  {{/if}}
</div><!-- .row -->

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"
  }
}