ontime/apps/client/src/common/stores/runtime.ts

import isEqual from 'react-fast-compare';
import { RuntimeStore, runtimeStorePlaceholder } from 'ontime-types';
import { createWithEqualityFn, useStoreWithEqualityFn } from 'zustand/traditional';

const deepCompare = <T>(a: T, b: T) => isEqual(a, b);

export const runtimeStore = createWithEqualityFn<RuntimeStore>(
  () => ({
    ...runtimeStorePlaceholder,
  }),
  deepCompare,
);

export const useRuntimeStore = <T>(selector: (state: RuntimeStore) => T) =>
  useStoreWithEqualityFn(runtimeStore, selector, deepCompare);

/**
 * Allows patching a property of the runtime store
 * @param key
 * @param value
 */
export function patchRuntime<K extends keyof RuntimeStore>(key: K, value: RuntimeStore[K]): void {
  const state = runtimeStore.getState();
  state[key] = value;
  runtimeStore.setState({ ...state });
}