pip-webui/pip-webui-core/src/utilities/collections.js

HTML5 UI for LOB applications

/**
 * @file Collection utilities
 * @copyright Digital Living Software Corp. 2014-2016
 */

/* global _, angular */

(function () {
    'use strict';

    var thisModule = angular.module('pipUtils.Collections', []);

    thisModule.factory('pipCollections', function () {
        var collections = {};

        // Index of element in array by key
        collections.indexBy = function (items, key, value) {
            if (!items || !items.length)
                return null;
            for (var i = 0; i < items.length; i++) {
                if (items[i][key] == value) {
                    return i;
                }
            }
            return null;
        };
    
        // Find element in array by key
        collections.findBy = function (items, key, value) {
            if (!items || !items.length)
                return null;
            for (var i = 0; i < items.length; i++) {
                if (items[i][key] == value) {
                    return items[i];
                }
            }
            return null;
        };
    
        // Remove element from array by value
        collections.remove = function (items, item) {
            if (!items || !items.length)
                return null;
            for (var i = 0; i < items.length; i++) {
                if (items[i] == item) {
                    items.splice(i, 1);
                    i--;
                }
            }
        };
    
        // Removes element from array by key
        collections.removeBy = function (items, key, value) {
            if (!items || !items.length)
                return null;
            for (var i = 0; i < items.length; i++) {
                if (items[i][key] == value) {
                    items.splice(i, 1);
                    i--;
                }
            }
        };
    
        // Replaced element by key
        collections.replaceBy = function (items, key, value, data) {
            if (!items || !items.length)
                return null;
            for (var i = 0; i < items.length; i++) {
                if (items[i][key] == value) {
                    items[i] = data;
                    return;
                }
            }
        };
    
        // Calculate difference between two collections
        collections.difference = function (a1, a2, comparator) {
            var result = [];
    
            _.each(a1, function (e1) {
                var e2 = _.find(a2, function (e) {
                    return comparator(e1, e);
                });
    
                if (e2 == null) {
                    result.push(e1);
                }
            })
    
            return result;
        };

        return collections;
    });

})();