iconoir/iconoir.com/components/useCustomizationPersistence.ts

import React from 'react';
import { DEFAULT_CUSTOMIZATIONS, IconListCustomizations } from './IconList';

const CUSTOMIZATIONS_KEY = 'iconoir-customize';

export function useCustomizationPersistence(): [
  IconListCustomizations,
  // eslint-disable-next-line no-unused-vars
  (customizations: IconListCustomizations) => void
] {
  const [customizations, _setCustomizations] = React.useState(
    DEFAULT_CUSTOMIZATIONS
  );
  React.useEffect(() => {
    const localStorageValue = localStorage.getItem(CUSTOMIZATIONS_KEY);
    if (localStorageValue) {
      try {
        const parsedValue = JSON.parse(localStorageValue);
        _setCustomizations({ ...DEFAULT_CUSTOMIZATIONS, ...parsedValue });
      } catch {
        // Do nothing...
      }
    }
  }, []);

  return [
    customizations,
    (newCustomizations) => {
      localStorage.setItem(
        CUSTOMIZATIONS_KEY,
        JSON.stringify(newCustomizations)
      );
      _setCustomizations(newCustomizations);
    },
  ];
}