Angular Pagination Factory

paginator.js

'use strict';

/**
 * @ngdoc factory
 * @name perfmanApp.Paginator
 * @description
 * # Paginator
 * Factory in the perfmanApp.
 */
angular.module('perfmanApp')
	.factory('Paginator'
	, function Paginator() {

		return function(data, options) {

			/**
			 * Globals
			 */
			options = options || {}
			var pageSize = options.pageSize || 5
			var currentPage = options.currentPage || 1
			this.data = data

			/**
			 * Total Page Count
			 * @return {Number} - Total number of pages
			 */
			this.totalPages = function() {
				var pages = Math.floor(data.length/pageSize)
				if(pages === 0)
					pages = 1
				return pages
			}

			/**
			 * Go To specific page number
			 * @params {Number} - Page number to go to
			 */
			this.goTo = function(pageNumber) {
				currentPage = pageNumber
				this.data = pagedData()
			}

			/**
			 * Current Page
			 * @return {Number} - the current page viewed
			 */
			this.currentPage = function() {
				return currentPage
			}

			/**
			 * Paged Data
			 * @description - The Finial Array list of items for the currently viewed page
			 * @return {Array} - List of items for currently viewed page
			 */
			var pagedData = function() {
				var start = (currentPage - 1) * pageSize
				var end = start + pageSize
				return data.slice(start, end)
			}

			/**
			 * Return the list of items for the currently viewed page
			 */
			this.data = pagedData()
		}

	})