add module to read and write localStorage

HectorVilas · May 2, 2023 · 8ef4aaa · 8ef4aaa
1 parent 5f571a8
commit 8ef4aaa
Showing 1 changed file with 76 additions and 0 deletions.
diff --git a/modules/storedData.js b/modules/storedData.js
@@ -0,0 +1,76 @@
+export const storedData = (() => {
+  if (!localStorage.getItem('cart')) localStorage.setItem('cart',JSON.stringify({}));
+  if (!localStorage.getItem('favs')) localStorage.setItem('favs',JSON.stringify([]));
+
+  const storedCart = JSON.parse(localStorage.cart);
+  const storedFavs = JSON.parse(localStorage.favs);
+
+  function getData() {
+    return {
+      storedCart,
+      storedFavs,
+    };
+  }
+
+  function getCounts() {
+    let cartCount = 0;
+    let favsCount = 0;
+    for (const item in storedCart) {
+      cartCount += storedCart[item];
+    }
+    favsCount = storedFavs.reduce((curr, next) => curr + next);
+
+    return {
+      cartCount,
+      favsCount,
+    }
+  }
+
+  function isFav(item) {
+    return storedFavs.includes(item);
+  }
+
+  function addFav(item) {
+    if (!storedFavs.includes(item)) storedFavs.push(item);
+
+    localStorage.setItem('favs', JSON.stringify(storedFavs));
+  }
+
+  function removeFav(item) {
+    const itemIndex = storedFavs.indexOf(item);
+    storedFavs.splice(itemIndex, 1);
+
+    localStorage.setItem('favs', JSON.stringify(storedFavs));
+  }
+
+  function amountInCart(item) {
+    return storedCart[item] || 0;
+  }
+
+  function addToCart(item) {
+    if (!storedCart[item]) storedCart[item] = 0;
+    storedCart[item] += 1;
+
+    localStorage.setItem('cart', JSON.stringify(storedCart));
+  }
+
+  function removeFromCart(item) {
+    storedCart[item] -= 1;
+    if (storedCart[item] === 0) delete storedCart[item];
+
+    localStorage.setItem('cart', JSON.stringify(storedCart));
+  }
+
+
+
+  return {
+    getData,
+    getCounts,
+    isFav,
+    addFav,
+    removeFav,
+    amountInCart,
+    addToCart,
+    removeFromCart,
+  }
+})();