tutu/src/platform/timesrc.ts

import {
  Accessor,
  createContext,
  createRenderEffect,
  createSignal,
  onCleanup,
  untrack,
  useContext,
} from "solid-js";

const TimeSourceContext = createContext<Accessor<Date>>();

export const TimeSourceProvider = TimeSourceContext.Provider;

export function createTimeSource() {
  let id: ReturnType<typeof setTimeout> | undefined;
  const [get, set] = createSignal(new Date());

  createRenderEffect(() =>
    untrack(() => {
      id = setTimeout(() => {
        set(new Date());
      }, 30 * 1000);
    }),
  );

  onCleanup(() => {
    if (typeof id !== "undefined") {
      clearInterval(id);
    }
  });

  return get;
}

export function useTimeSource() {
  return (
    useContext(TimeSourceContext) ??
    (console.warn("useTimeSource() is used but no source is provided"),
    createTimeSource())
  );
}