50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
import _ from 'underscore';
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import bp from '~/breakpoints';
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import { FREQUENT_ITEMS, HOUR_IN_MS } from './constants';
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export const isMobile = () => {
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const screenSize = bp.getBreakpointSize();
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return screenSize === 'sm' || screenSize === 'xs';
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};
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export const getTopFrequentItems = items => {
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if (!items) {
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return [];
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}
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const frequentItemsCount = isMobile()
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? FREQUENT_ITEMS.LIST_COUNT_MOBILE
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: FREQUENT_ITEMS.LIST_COUNT_DESKTOP;
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const frequentItems = items.filter(item => item.frequency >= FREQUENT_ITEMS.ELIGIBLE_FREQUENCY);
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if (!frequentItems || frequentItems.length === 0) {
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return [];
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}
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frequentItems.sort((itemA, itemB) => {
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// Sort all frequent items in decending order of frequency
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// and then by lastAccessedOn with recent most first
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if (itemA.frequency !== itemB.frequency) {
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return itemB.frequency - itemA.frequency;
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} else if (itemA.lastAccessedOn !== itemB.lastAccessedOn) {
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return itemB.lastAccessedOn - itemA.lastAccessedOn;
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}
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return 0;
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});
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return _.first(frequentItems, frequentItemsCount);
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};
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export const updateExistingFrequentItem = (frequentItem, item) => {
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const accessedOverHourAgo =
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Math.abs(item.lastAccessedOn - frequentItem.lastAccessedOn) / HOUR_IN_MS > 1;
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return {
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...item,
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frequency: accessedOverHourAgo ? frequentItem.frequency + 1 : frequentItem.frequency,
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lastAccessedOn: accessedOverHourAgo ? Date.now() : frequentItem.lastAccessedOn,
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};
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};
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