wp-calypso/client/blocks/jetpack-benefits/site-visits.tsx

import { useTranslate } from 'i18n-calypso';
import moment from 'moment';
import * as React from 'react';
import { JetpackBenefitsCard } from 'calypso/blocks/jetpack-benefits/benefit-card';
import QuerySiteStats from 'calypso/components/data/query-site-stats';
import memoizeLast from 'calypso/lib/memoize-last';
import { useSelector } from 'calypso/state';
import {
	getSiteStatsNormalizedData,
	isRequestingSiteStatsForQuery,
} from 'calypso/state/stats/lists/selectors';

const memoizedQuery = memoizeLast( ( period, unit, quantity, endOf ) => ( {
	period,
	unit: unit,
	quantity: quantity,
	date: endOf,
} ) );

interface Props {
	siteId: number;
	statType: string;
	query: {
		period: string;
		unit: string;
		quantity: number;
		date: string;
	};
}

const JetpackBenefitsSiteVisits: React.FC< Props > = ( { siteId, statType, query } ) => {
	const translate = useTranslate();

	const isRequestingStats = useSelector( ( state ) => {
		return isRequestingSiteStatsForQuery( state, siteId, statType, query );
	} );

	const data = useSelector( ( state ) => {
		return getSiteStatsNormalizedData( state, siteId, statType, query );
	} );

	if ( isRequestingStats ) {
		return (
			<JetpackBenefitsCard
				headline={ translate( 'Jetpack Stats' ) }
				stat={ translate( 'Loading' ) }
				description={ translate( 'Getting visitors stat' ) }
				placeholder
			/>
		);
	}

	const dataArray: { views: number }[] = Array.isArray( data ) ? data : [];
	const countVisits = dataArray.reduce( ( count: number, monthPeriod: { views: number } ) => {
		return count + monthPeriod.views;
	}, 0 );

	return (
		<React.Fragment>
			<JetpackBenefitsCard
				headline={ translate( 'Jetpack Stats' ) }
				stat={ countVisits > 0 ? countVisits : null }
				description={
					countVisits > 0
						? translate( 'Visitors to your site tracked by Jetpack in the last year.' )
						: translate( 'Jetpack provides stats about your site' )
				}
			/>
		</React.Fragment>
	);
};

export default ( props: { siteId: number } ) => {
	const { siteId } = props;
	const today = moment().locale( 'en' );
	const statType = 'statsVisits';
	const period = 'year';
	const query = memoizedQuery( period, 'month', 12, today.format( 'YYYY-MM-DD' ) );

	return (
		<>
			<QuerySiteStats siteId={ siteId } statType={ statType } query={ query } />
			<JetpackBenefitsSiteVisits statType={ statType } query={ query } { ...props } />
		</>
	);
};