Gishen-Mob/lib/stores/favoritesStore.ts

import AsyncStorage from "@react-native-async-storage/async-storage";
import { create } from "zustand";
import { createJSONStorage, persist } from "zustand/middleware";
import { seedFavoriteIds } from "@/lib/data/seed";

type FavState = {
  ids: string[];
  toggle: (id: string) => void;
  has: (id: string) => boolean;
};

export const useFavoritesStore = create<FavState>()(
  persist(
    (set, get) => ({
      ids: seedFavoriteIds,
      toggle: (id) => {
        const ids = get().ids;
        set({
          ids: ids.includes(id) ? ids.filter((x) => x !== id) : [...ids, id],
        });
      },
      has: (id) => get().ids.includes(id),
    }),
    {
      name: "gishen-favorites",
      storage: createJSONStorage(() => AsyncStorage),
      version: 2,
      migrate: (persisted: unknown) => {
        const state = (persisted ?? {}) as Partial<FavState>;
        return !state.ids?.length ? { ...state, ids: seedFavoriteIds } : state;
      },
    }
  )
);