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