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import debug from './debug';
import MARKETING_COUPONS_KEY from './marketing-coupons-key';
import urlParseAmpCompatible from './url-parse-amp-compatible';
/**
* Remembers `?coupon` query argument via `localStorage`.
*/
export default function saveCouponQueryArgument() {
// Read coupon query argument, return early if there is none.
const parsedUrl = urlParseAmpCompatible( window.location.href );
const couponCode = parsedUrl?.searchParams.get( 'coupon' );
if ( ! couponCode ) {
return;
}
// Read coupon list from localStorage, create new if it's not there yet, refresh existing.
let coupons = null;
try {
const couponsJson = window.localStorage.getItem( MARKETING_COUPONS_KEY );
coupons = JSON.parse( couponsJson );
} catch ( err ) {}
if ( ! coupons ) {
coupons = {};
}
const THIRTY_DAYS_MILLISECONDS = 7 * 24 * 60 * 60 * 1000;
const now = Date.now();
debug( 'Found coupons in localStorage: ', coupons );
coupons[ couponCode ] = now;
// Delete coupons if they're older than 30 days.
Object.keys( coupons ).forEach( ( key ) => {
if ( now > coupons[ key ] + THIRTY_DAYS_MILLISECONDS ) {
delete coupons[ key ];
}
} );
// Write remembered coupons back to localStorage.
try {
debug( 'Storing coupons in localStorage: ', coupons );
window.localStorage.setItem( MARKETING_COUPONS_KEY, JSON.stringify( coupons ) );
} catch ( err ) {}
}
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