@tanstack/db/dist/esm/strategies/serial-pacer.js

A reactive client store for building super fast apps on sync

function createSerialPacer(wait) {
  const pending = /* @__PURE__ */ new Map();
  const defaultOwner = {};
  let persisting = false;
  let nextStartAt = Number.NEGATIVE_INFINITY;
  let timeout;
  function drain() {
    if (persisting || pending.size === 0) return;
    const delay = nextStartAt - Date.now();
    if (delay > 0) {
      timeout ??= setTimeout(() => {
        timeout = void 0;
        drain();
      }, delay);
      return;
    }
    const [owner, callback] = pending.entries().next().value;
    pending.delete(owner);
    persisting = true;
    nextStartAt = Date.now() + wait;
    try {
      void callback().then(settled, settled);
    } catch (error) {
      persisting = false;
      queueMicrotask(drain);
      throw error;
    }
  }
  function settled() {
    persisting = false;
    drain();
  }
  return {
    schedule(callback, owner = defaultOwner) {
      pending.set(owner, callback);
      drain();
    },
    hasPending(owner) {
      return owner === void 0 ? pending.size > 0 : pending.has(owner);
    },
    cancel(owner) {
      if (owner === void 0) pending.clear();
      else pending.delete(owner);
      if (pending.size === 0) {
        if (timeout !== void 0) clearTimeout(timeout);
        timeout = void 0;
      }
    }
  };
}
export {
  createSerialPacer
};
//# sourceMappingURL=serial-pacer.js.map