Ember.js weekly calendar navigation

I'm building a simple weekly calendar component for my app and I'm struggling to find a way for creating the weeks navigation. Here's what I have so far:

/week-view/component.js

import Ember from 'ember';

export default Ember.Component.extend({
  firstDay: moment().startOf('week'),

  days: Ember.computed('firstDay', function() {
    let firstDay = this.get('firstDay').subtract(1, 'days');
    let week = [];
    for (var i = 1; i <= 7; i++) {
      var day = firstDay.add(1, 'days').format('MM-DD-YYYY');
      week.push(day);
    }
    return week;
  }),

  actions: {
    currentWeek() {
      this.set('firstDay', moment().startOf('week'));
    },
    previousWeek() {
      this.set('firstDay', moment().startOf('week').subtract(7, 'days'));
    },
    nextWeek() {
      this.set('firstDay', moment().startOf('week').add(7, 'days'));
    }
  }
});

/week-view/template.hbs

<button >previous</button>
<button >current week</button>
<button >next</button>
<ul>
  
    <li></li>
  
</ul>

At the moment it works to navigate one week before and one after the current week only. Any idea on how to make this work for an unlimited number of weeks is greatly appreciated. Thanks in advance.