const _cache = {};
const minute = 60 * 1000;

const cache = (key, fn, minutes) => {
    if (_cache[key] && _cache[key].expires >= new Date()) {
        return _cache[key].data;
    }
    else
    {
        const data = fn();
        if (data) {
            _cache[key] = {
                expires: new Date(new Date().getTime() + (minutes * minute)),
                data: data
            };
        }
        return data;
    }
};

const removeFromCache = key => {
    if (_cache[key]) {
        delete _cache[key];
    }
};