/* MAIN */
// Registering a single interval scales much better than registering N timeouts
// Timeouts are respected within the interval margin
const WatcherLocksResolver = {
    /* VARIABLES */
    interval: 100,
    intervalId: undefined,
    fns: new Map(),
    /* LIFECYCLE API */
    init: () => {
        if (WatcherLocksResolver.intervalId)
            return;
        WatcherLocksResolver.intervalId = setInterval(WatcherLocksResolver.resolve, WatcherLocksResolver.interval);
    },
    reset: () => {
        if (!WatcherLocksResolver.intervalId)
            return;
        clearInterval(WatcherLocksResolver.intervalId);
        delete WatcherLocksResolver.intervalId;
    },
    /* API */
    add: (fn, timeout) => {
        WatcherLocksResolver.fns.set(fn, Date.now() + timeout);
        WatcherLocksResolver.init();
    },
    remove: (fn) => {
        WatcherLocksResolver.fns.delete(fn);
    },
    resolve: () => {
        if (!WatcherLocksResolver.fns.size)
            return WatcherLocksResolver.reset();
        const now = Date.now();
        for (const [fn, timestamp] of WatcherLocksResolver.fns) {
            if (timestamp >= now)
                continue; // We should still wait some more for this
            WatcherLocksResolver.remove(fn);
            fn();
        }
    }
};
/* EXPORT */
export default WatcherLocksResolver;
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