Computer Science Club of the University of Waterloo's website. https://csclub.uwaterloo.ca
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www-new/components/WarningHeader.tsx

61 lines
1.8 KiB

import { parse } from "date-fns";
import React from "react";
import { DATE_FORMAT, getLocalDateFromEST } from "@/utils";
import warnings from "../content/warnings/warnings.json";
import styles from "./WarningHeader.module.css";
interface Warning {
message: string;
startDate: string;
endDate: string;
}
function getCurrentWarning(): Warning | null {
const today = new Date();
const currentWarnings: Warning[] = warnings.filter((warning) => {
// convert dates to date objects in EST time zone
let startDate = parse(warning.startDate, DATE_FORMAT, new Date());
let endDate = parse(warning.endDate, DATE_FORMAT, new Date());
if (
!startDate ||
!endDate ||
isNaN(startDate.getTime()) || // this checks if the parsed date is not valid (eg. wrong format), since getLocalDateFromEST fails with invalid dates
isNaN(endDate.getTime())
) {
throw new Error('WARNING WITH INVALID DATES: "' + warning.message + '"');
}
startDate = getLocalDateFromEST(startDate);
endDate = getLocalDateFromEST(endDate);
return (
startDate.getTime() <= today.getTime() &&
endDate.getTime() >= today.getTime()
);
});
if (currentWarnings.length > 1) {
// If more than one warning is scheduled, log an error to the console. We cannot throw an error, since the site would go down on the live
// website, on the day when more than one warning is scheduled.
console.error(
"ERROR: MORE THAN ONE WARNING SCHEDULED CURRENTLY! ",
currentWarnings
);
}
return currentWarnings.length === 0 ? null : currentWarnings[0];
}
export function WarningHeader() {
const warning = getCurrentWarning();
if (warning == null) {
return null;
}
return <div className={styles.warning}>{warning.message}</div>;
}