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async function wrapRedis<T>(key: string, fn: () => Promise<T>, seconds = 60): Promise<T> {
	const cached = await redis.get(key);
	if (cached) return JSON.parse(cached);

	const recent = await fn();

	if (recent) {
		await redis.set(key, JSON.stringify(recent), 'ex', seconds);
	}

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export function useThrottle<T>(value: T, limit = 1000) {
	const [throttledValue, setThrottledValue] = useState(value);
	const lastRan = useRef(Date.now());

	useEffect(() => {
		const handler = setTimeout(() => {
			if (Date.now() - lastRan.current >= limit) {
				setThrottledValue(value);
				lastRan.current = Date.now();
			}

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/**
 * TypeScript currently lacks a way of typing a record of keys only but not values.
 * we need this because we want an object of typed keys but we want to leave the values inferred.
 * thankfully, we can do this with generics. This function allows the second generic's values to be inferred
 * so that our object is fully type safe for hugely complex types, but we can guarantee that all the keys we need exist.
 * It's not perfect, but it gets the job done for the time being
 */
export function ensureKeys<T>() {
	/**
	 * Function that returns the value that gets put in, values are type-safely inferred

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/**
 * Handle clicks outside of an element.
 * This is useful for closing a modal by clicking outside of the modal.
 * @param callback - The callback function to run when clicking outside of an element
 */
export function useOutsideClick<E extends HTMLElement = HTMLElement>(callback: () => unknown) {
  const container = useRef<E | null>(null);

  useEffect(() => {
    const handler = (event: MouseEvent) => {

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interface Schema<Out> {
	parse(value: unknown, path: string): Out;
}

type Resolve<T> = T extends Schema<infer R> ? Resolve<R> : T;

function bool(): Schema<boolean> {
	return {
		parse(value, path) {
			const valid = typeof value === "boolean";

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import {Dialog, Transition} from '@headlessui/react';
import React, {Fragment, ReactNode} from 'react';
import {BiX} from 'react-icons/bi';

interface Props<Y> {
	isOpen: boolean;
	close: () => unknown;

	// Required because used in the callback
	// eslint-disable-next-line react/no-unused-prop-types

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interface Interceptor {
    condition(i: number): boolean;
    execute(i: number): void;
}

abstract class FizzBuzzUtils {
    protected isMultipleOf(a: number, multiplier: number) {
        return a % multiplier === 0;
    }
}

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type Constructor<T> = new (...args: any[]) => T;
type Then<T, R> = (value: T) => R;

export function ifInstance<T, R>(instance: Constructor<T>, then: Then<T, R>) {
    return (value: unknown) => {
        if (value instanceof instance) {
            return then(value);
        }

        throw value;

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// Multiplication in raw TypeScript. Please, please do not ever ever ever use this

type TupleOfLength<
  T,
  L extends number,
  R extends T[] = []
> = R["length"] extends L ? R : TupleOfLength<T, L, [...R, T]>;

type FlattenResult<
  T extends 0[][],

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type RemoveOn<T extends string> = T extends `on${infer R}` ? R : T;
type PropsFor<El extends keyof JSX.IntrinsicElements> = JSX.IntrinsicElements[El];
type OnProps<El extends keyof JSX.IntrinsicElements> = Uncapitalize<RemoveOn<Extract<keyof PropsFor<El>, `on${string}`>>>;
type HandlerFor<El extends keyof JSX.IntrinsicElements, Ev extends OnProps<El>> = NonNullable<PropsFor<El>[`on${Capitalize<Ev>}` & keyof PropsFor<El>]>;

// Creating with a callback
function handlerFor<El extends keyof JSX.IntrinsicElements, Ev extends OnProps<El>>(event: [El, Ev], handler: HandlerFor<El, Ev>) {
    return handler;
}