discourse/app/assets/javascripts/admin/controllers/admin-backups.js.es6

export default Ember.Controller.extend({
  noOperationIsRunning: Ember.computed.not("model.isOperationRunning"),
  rollbackEnabled: Ember.computed.and(
    "model.canRollback",
    "model.restoreEnabled",
    "noOperationIsRunning"
  ),
  rollbackDisabled: Ember.computed.not("rollbackEnabled")
});