@applicaster/zapp-react-native-utils/reactHooks/utils/index.ts

Applicaster Zapp React Native utilities package

import { useRef, useEffect } from "react";

/**
 * This hook returns a previous value that was passed to it.
 * Eg. If on first render, you pass a "1" and on second render "2" the hook will return "1"
 * Hook is meant to mimic prevProps/prevState values that would be passed to the ComponenDidupdate function.
 * @param {*} value
 * @return {*}
 */
export const usePrevious = (value: any): any => {
  const ref = useRef();

  useEffect(() => {
    ref.current = value;
  });

  return ref.current;
};

/**
 * Returns true if component is on the initial render
 * @return boolean
 */
export const useIsInitialRender = (): boolean => {
  const isInitialRenderRef = useRef(true);

  useEffect(() => {
    isInitialRenderRef.current = false;
  }, []);

  return isInitialRenderRef.current;
};

export const checkIsLocalFeed = (feedUrl) => feedUrl?.startsWith("pipesv2://");

export const shouldDispatchData = (
  url: string,
  feed: ZappPipesData | null,
  clearCache: boolean
) => {
  const currentFeedHasData = feed?.data;
  const isLocalFeed = checkIsLocalFeed(url);

  return !currentFeedHasData || clearCache || isLocalFeed;
};