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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | 1x 11x 11x 1x 1x 10x 10x 1x 1x 9x 1x 3x 1x 2x 2x 5x 2x 1x 1x 1x 5x 5x 1x 1x 1x 1x 1x 1x 1x 1x 2x 2x 4x 2x 1x 1x 1x 1x 1x 3x 1x 2x 2x 5x 2x 1x 1x 1x 1x 1x | // get restaurants from local storage
const get = () => {
const restaurantValue = localStorage.getItem("restaurants");
if (restaurantValue === undefined) {
const restaurantCollection = { nextId: 1, restaurants: [] }
return set(restaurantCollection);
}
const restaurantCollection = JSON.parse(restaurantValue);
if (restaurantCollection === null) {
const restaurantCollection = { nextId: 1, restaurants: [] }
return set(restaurantCollection);
}
return restaurantCollection;
};
const getById = (id) => {
if (id === undefined) {
return { "error": "id is a required parameter" };
}
const restaurantCollection = get();
const restaurants = restaurantCollection.restaurants;
/* eslint-disable-next-line eqeqeq */ // we really do want == here, not ===
const index = restaurants.findIndex((r) => r.id == id);
if (index === -1) {
return { "error": `restaurant with id ${id} not found` };
}
return { restaurant: restaurants[index] };
}
// set restaurants in local storage
const set = (restaurantCollection) => {
localStorage.setItem("restaurants", JSON.stringify(restaurantCollection));
return restaurantCollection;
};
// add a restaurant to local storage
const add = (restaurant) => {
const restaurantCollection = get();
restaurant = { ...restaurant, id: restaurantCollection.nextId };
restaurantCollection.nextId++;
restaurantCollection.restaurants.push(restaurant);
set(restaurantCollection);
return restaurant;
};
// update a restaurant in local storage
const update = (restaurant) => {
const restaurantCollection = get();
const restaurants = restaurantCollection.restaurants;
/* eslint-disable-next-line eqeqeq */ // we really do want == here, not ===
const index = restaurants.findIndex((r) => r.id == restaurant.id);
if (index === -1) {
return { "error": `restaurant with id ${restaurant.id} not found` };
}
restaurants[index] = restaurant;
set(restaurantCollection);
return { restaurantCollection: restaurantCollection };
};
// delete a restaurant from local storage
const del = (id) => {
if (id === undefined) {
return { "error": "id is a required parameter" };
}
const restaurantCollection = get();
const restaurants = restaurantCollection.restaurants;
/* eslint-disable-next-line eqeqeq */ // we really do want == here, not ===
const index = restaurants.findIndex((r) => r.id == id);
if (index === -1) {
return { "error": `restaurant with id ${id} not found` };
}
restaurants.splice(index, 1);
set(restaurantCollection);
return { restaurantCollection: restaurantCollection };
};
const restaurantUtils = {
get,
getById,
add,
update,
del
};
export { restaurantUtils };
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