confirmable

confirming.hbs

{{#if confirming}}
  <button class="btn btn-danger" {{action 'confirm'}}>Are you sure?</button>
{{else}}
  <button class="btn btn-primary" {{action 'startConfirming'}}>{{text}}</button>
{{/if}}

index.hbs

<script type="text/x-handlebars" data-template-name="index">
  <h3>status: {{status}}</h3>
  {{#unless hacked}}
    <div>{{app-confirmable text="Hack mainframe?" action="hack"}}</div>
  {{/unless}}
</script>