beatsaber-overlay/utils/utils.js

import Config from '../config.json';

const mapCache = new Map();

module.exports = {
    BEATSAVER_MAP_API: Config.proxy_url + "/https://api.beatsaver.com/maps/hash/%s",

    /**
     * Gets a specified maps data from BeatSaver
     * 
     * @param {string} hash 
     * @returns The map data
     */
    async getMapData(hash) {
        hash = this.BEATSAVER_MAP_API.replace("%s", hash);
        if (mapCache.has(hash)) { // Return from cache
            return mapCache.get(hash);
        }

        const data = await fetch(hash, {
            headers: {
                "origin": "Fascinated Overlay"
            }
        });
        if (data.status === 404) {
            return undefined;
        }
        const json = await data.json();
        mapCache.set(hash, json);
        setTimeout(() => {
            mapCache.delete(hash);
        }, 60 * 60 * 1000); // 1h
        return json;
    }
}