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/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
define([
'jquery',
'jquery-ui-modules/widget'
], function ($) {
'use strict';
$.widget('mage.upsellProducts', {
options: {
elementsSelector: '.item.product'
},
/**
* Bind events to the appropriate handlers.
* @private
*/
_create: function () {
if (this.element.data('shuffle')) {
this._shuffle(this.element.find(this.options.elementsSelector));
}
this._showUpsellProducts(
this.element.find(this.options.elementsSelector),
this.element.data('limit'),
this.element.data('shuffle-weighted')
);
},
/* jscs:disable */
/* eslint-disable */
/**
* Show upsell products according to limit. Shuffle if needed.
* @param {*} elements
* @param {Number} limit
* @param {Boolean} weightedRandom
* @private
*/
_showUpsellProducts: function (elements, limit, weightedRandom) {
var index, weights = [], random = [], weight = 2, shown = 0, $element, currentGroup, prevGroup;
if (limit === 0) {
limit = elements.length;
}
if (weightedRandom && limit > 0 && limit < elements.length) {
for (index = 0; index < limit; index++) {
$element = $(elements[index]);
if ($element.data('shuffle-group') !== '') {
break;
}
$element.show();
shown++;
}
limit -= shown;
for (index = elements.length - 1; index >= 0; index--) {
$element = $(elements[index]);
currentGroup = $element.data('shuffle-group');
if (currentGroup !== '') {
weights.push([index, Math.log(weight)]);
if (typeof prevGroup !== 'undefined' && prevGroup !== currentGroup) {
weight += 2;
}
prevGroup = currentGroup;
}
}
if (weights.length === 0) {
return;
}
for (index = 0; index < weights.length; index++) {
random.push([weights[index][0], Math.pow(Math.random(), 1 / weights[index][1])]);
}
random.sort(function(a, b) {
a = a[1];
b = b[1];
return a < b ? 1 : (a > b ? -1 : 0);
});
index = 0;
while (limit) {
$(elements[random[index][0]]).show();
limit--;
index++
}
return;
}
for (index = 0; index < limit; index++) {
$(elements[index]).show();
}
},
/* jscs:disable */
/* eslint-disable */
/**
* Shuffle an array
* @param elements
* @returns {*}
*/
_shuffle: function shuffle(elements){ //v1.0
var parent, child, lastSibling;
if (elements.length) {
parent = $(elements[0]).parent();
}
while (elements.length) {
child = elements.splice(Math.floor(Math.random() * elements.length), 1)[0];
lastSibling = parent.find('[data-shuffle-group="' + $(child).data('shuffle-group') + '"]').last();
lastSibling.after(child);
}
}
/* jscs:disable */
/* eslint:disable */
});
return $.mage.upsellProducts;
});