share.html

<a share="facebook" data-url="http://www.getringer.com/" class="btn btn-primary">Share to Facebook</a>
<span share="facebook" data-url="http://www.getringer.com/">Shares: {{share_count | humanCount}}</a>

share.js

function humanifyCount(number) {
    var count = number.toString();
    var decimal = '';
    if (count.length > 6) {
        if (count.slice(-6,-5) !== '0') {
            decimal = '.'+count.slice(-6,-5);
        }
        count = count.slice(0, -6);
        count = count + decimal + 'M';
    } else if (count.length > 3) {
        if (count.slice(-3,-2) !== '0') {
            decimal = '.' + count.slice(-3, -2);
        }
        count = count.slice(0, -3);
        count = count + decimal + 'k';
    }
    return count;
}

getRingerApp.filter('humanCount', function() {
    return function (number) {
        return typeof number === 'number' ? humanifyCount(number) : '';
    };
});

getRingerApp.directive('share', function ($compile, $http) {
    return {
        restrict: 'AE',
        link: function (scope, element, attrs) {
            var url, popup;

            $http.get('https://api.facebook.com/method/links.getStats?urls=' + encodeURIComponent(attrs.url) + '&format=json').success(function (data) {
                scope.share_count = data[0].share_count;
                scope.like_count = data[0].like_count;
                scope.click_count = data[0].click_count;
                scope.total_count = data[0].total_count;
            });

            element.on('click', function () {
                if (attrs.share === 'facebook') {
                    url = 'https://www.facebook.com/sharer/sharer.php?u=' + encodeURIComponent(attrs.url) + '&display=popup';
                    popup = window.open(url, 'share', 'toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,height=300,width=611,top=' + ((screen.height / 2) - (300 / 2)) + ',left=' + ((screen.width / 2) - (611 / 2)));
                    if (window.focus) {
                        popup.focus();
                    }
                }
            });
        }
    };
});