lucifer/webui/src/Hooks/lights.js

import {setGlobal, useGlobal} from "reactn";
import {fetchGet} from "../Helpers/fetcher";
import {useEffect} from "react";

setGlobal({
  lights: null,
});

function useLights() {
  const [lights, setLights] = useGlobal("lights");

  function reloadLights() {
    setLights(null);

    fetchGet("/light/").then(({error, data}) => {
      if (error !== null) {
        console.error(error);
        return;
      }

      setLights(data);
    });
  }

  useEffect(() => {
    if (lights === null) {
      reloadLights();
    }
  }, []);

  function lightsByBridge(bridgeId) {
    if (lights === null) {
      return null;
    }

    return lights.filter(light => light.bridgeId === bridgeId);
  }

  return {lights, lightsByBridge, reloadLights};
}

export default useLights;