koboprice/lib/usePrices.js

35 lines
1,007 B
JavaScript

import { useEffect, useState } from "preact/hooks";
import { COUNTRIES } from "./countries";
import { bookPriceFor } from "./bookPriceFor";
const sortPrices = (prices) =>
prices.sort(
(a, b) =>
(a?.convertedPrice?.intValue || Infinity) -
(b?.convertedPrice?.intValue || Infinity),
);
export const usePrices = () => {
const [prices, setPrices] = useState(COUNTRIES);
useEffect(() => {
const fetchAll = async () => {
for (const [index, country] of COUNTRIES.entries()) {
// intentionally blocking execution
// to resolve sequentially.
// It should prevent DOS and triggering captcha
const found = await bookPriceFor(country);
prices[index] = found;
sortPrices(prices);
setPrices([...prices]);
}
l("DONE");
};
fetchAll();
}, []);
const percentChecked =
(prices.filter((p) => p.countryPrice != undefined).length / prices.length) *
100;
return [prices, percentChecked.toFixed(0)];
};