AngularJS Collection controller for symfony2

AngularedCollectionController.js

sciApp.controller('AngularedCollectionController', ['$scope', '$compile', function ($scope, $compile) {
    $scope.index = 1;

    $scope.init = function (collectionId) {
        var indexes = [];

        $('#' + collectionId).find('input[type=hidden]').each(function () {
            var attrName = $(this).attr('name');

            var indexFinder = new RegExp('\\]\\[(\\d+)\\]\\[');
            var finded = indexFinder.exec(attrName);

            if (finded.length > 1) {
                indexes.push(parseInt(finded[1]));
            }
        });

        $scope.index = Math.max.apply(Math, indexes) + 1;
    };

    $scope.add = function (event) {
        var $collectionItems = $(event.target).parent().find('div.collection-items');
        var prototype = $collectionItems.attr('data-prototype');
        var prototypeName = $collectionItems.attr('data-prototype-name');
        var prototypeLabel = $collectionItems.attr('data-prototype-label');

        // Just in case it doesn't get it
        if (typeof prototypeName === 'undefined') {
            prototypeName = '__name__';
        }

        if (typeof prototypeLabel === 'undefined') {
            prototypeLabelss = '__name__label__';
        }

        var nameReplacePattern = new RegExp(prototypeName, 'g');
        var labelReplacePattern = new RegExp(prototypeLabel, 'g');

        prototype = prototype.replace(labelReplacePattern, $scope.index)
            .replace(nameReplacePattern, $scope.index);

        $newCollectionItem = $compile(prototype)($scope);
        $collectionItems.append($newCollectionItem);

        $scope.index++;
    };
}]);