app
        .factory('RewriteService', function () {
            return {
                transform: function (value, lowdash) {
                    lowdash = lowdash || '-';

                    var r1 = new RegExp(lowdash + '{2,}', 'g');
                    var r2 = new RegExp(lowdash + '+$', 'gm');
                    var r3 = new RegExp('^' + lowdash + '+', 'gm');

                    return value
                            .substring(0, 128)
                            .toLowerCase()
                            .strtr('ęóąśłżźćń', 'eoaslzzcn')
                            .replace(/[^a-z0-9]/g, lowdash)
                            .replace(r1, lowdash)
                            .replace(r2, '')
                            .replace(r3, '');
                }
            };
        });