metrics-11.js

identify(...args) {
  this.invoke('identify', ...args);
},

alias(...args) {
  this.invoke('alias', ...args);
},

trackEvent(...args) {
  this.invoke('trackEvent', ...args);
},

trackPage(...args) {
  this.invoke('trackPage', ...args);
},

invoke(methodName, ...args) {
  const adaptersObj = Ember.get(this, '_adapters');
  const adapterNames = Object.keys(adaptersObj);

  const adapters = adapterNames.map((adapterName) => {
    return Ember.get(adaptersObj, adapterName);
  });

  if (args.length > 1) {
    let [ adapterName, options ] = args;
    const adapter = Ember.get(adaptersObj, adapterName);

    adapter[methodName](options);
  } else {
    adapters.forEach((adapter) => {
      adapter[methodName](...args);
    });
  }
}