import Ember from 'ember';

export default Ember.Helper.helper(function(params) {
    var reviews = params[0] || [];
    var total = reviews.map((review) => {
        return review.rating;
    }).reduce((prev, next) => {
        return prev + next;
    });
    var fullStars = Math.floor(total / reviews.length);
    var halfStars = total / reviews.length;
    var stars = (new Array(fullStars + 1)).join('★');
    return fullStars === halfStars ? stars : stars.concat('½');
});