sendou.ink/app/features/chat/chat-utils.ts

import { differenceInDays } from "date-fns";
import type { ChatMessage } from "./chat-types";

const STAFF_EXTRA_DAYS = 7;

export function chatAccessible(args: {
	isStaff: boolean;
	expiresAfterDays: number;
	comparedTo: Date;
}): boolean {
	const extraDays = args.isStaff ? STAFF_EXTRA_DAYS : 0;
	return (
		differenceInDays(new Date(), args.comparedTo) <=
		args.expiresAfterDays + extraDays
	);
}

const DATE_PLACEHOLDER_PATTERN = /\{\{date:(\d+)\}\}/g;

export function datePlaceholder(date: Date): string {
	return `{{date:${date.getTime()}}}`;
}

export function resolveDatePlaceholders(
	text: string,
	formatDateTime: (date: Date) => string,
): string {
	return text.replace(DATE_PLACEHOLDER_PATTERN, (_match, ts) =>
		formatDateTime(new Date(Number(ts))),
	);
}

export function messageTypeToSound(type: ChatMessage["type"]) {
	if (type === "LIKE_RECEIVED") return "sq_like";
	if (type === "MATCH_STARTED") return "sq_match";
	if (type === "NEW_GROUP") return "sq_new-group";

	return null;
}

export function soundCodeToLocalStorageKey(soundCode: string) {
	return `settings__sound-enabled__${soundCode}`;
}

export function soundEnabled(soundCode: string) {
	const localStorageKey = soundCodeToLocalStorageKey(soundCode);
	const soundEnabled = localStorage.getItem(localStorageKey);

	return !soundEnabled || soundEnabled === "true";
}

export function soundVolume() {
	const volume = localStorage.getItem("settings__sound-volume");

	return volume ? Number.parseFloat(volume) : 100;
}