import Ember from 'ember';
              
              const { Mixin, computed } = Ember;
              
              /**
               * Mixin that adds support for pagination in a table.
               *
               * @class TablePaginationMixin
               * @extends Ember.Mixin
               */
              export default Mixin.create({
                /**
                 * Current page number.
                 *
                 * @property currentPage
                 * @type Number
                 * @default 1
                 * @public
                 */
                currentPage: 1,
              
                /**
                 * Number of records shown by page.
                 *
                 * @property recordsPerPage
                 * @type Number
                 * @default 50
                 * @public
                 */
                recordsPerPage: 50,
              
                /**
                 * Total number of records that are paginated. This is used to calculate the number of pages.
                 *
                 * @property totalRecords
                 * @type Number
                 * @default null
                 * @public
                 */
                totalRecords: null,
              
                /**
                 * Number of existing pages, calculated from {{#crossLink TablePagination#currentPage}}currentPage{{/crossLink}} and
                 * {{#crossLink TablePagination#recordsPerPage}}recordsPerPage{{/crossLink}}
                 *
                 * @property pageNumbers
                 * @type Number
                 * @public
                 */
                pageNumbers: computed('recordsPerPage', 'totalRecords', function() {
                  return Math.ceil(this.get('totalRecords') / this.get('recordsPerPage'));
                })
              });