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import { nowcastPMAqi } from "https://esm.town/v/stevekrouse/nowcastPMAqi?v=6";
import { msHour } from "https://esm.town/v/stevekrouse/msHour?v=1";
import { fetchJSON } from "https://esm.town/v/stevekrouse/fetchJSON?v=41";
export async function nowCastPMAQI({ location_id }) {
const { results } = await fetchJSON(
"https://api.openaq.org/v2/measurements?" +
new URLSearchParams({
limit: "100",
page: "1",
location_id,
date_from: new Date(Date.now() - 12 * msHour)
.toISOString(),
date_to: new Date().toISOString(),
parameter: "pm25",
order_by: "datetime",
}),
);
if (results && results.length > 0) {
return {
now: results.at(-1).value,
then: results.at(0).value,
aqi: nowcastPMAqi(results.map((o) => o.value)),
};
}
else {
return {
now: 0,
then: 0,
aqi: 0,
};
}
}
// Forked from @stevekrouse.nowCastPMAQI
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October 23, 2023