feat: implement compare functionality, checkout flow, and add 30 blog posts

lib/cart-store.ts

@@ -2,16 +2,12 @@ import { create } from 'zustand';
 import { persist } from 'zustand/middleware';
 
 export interface CartItem {
-  id: string; // Unikalne ID, połączenie slug + wybrane opcje
+  id: string;
   slug: string;
   name: string;
   brand: string;
   image: string;
-  power?: number;
-  label?: string; // Np. "2.5 kW" z wariantu
-  price: number; // Podstawowa cena za 1 szt. bez montażu
-  priceWithInstall: number; // Cena za 1 szt. z montażem
-  withInstall: boolean;
+  price: number;
   quantity: number;
 }
 
@@ -20,9 +16,9 @@ interface CartState {
   addItem: (item: Omit<CartItem, 'id' | 'quantity'>) => void;
   removeItem: (id: string) => void;
   updateQuantity: (id: string, quantity: number) => void;
-  toggleInstall: (id: string) => void;
   clearCart: () => void;
-  getTotals: () => { subtotal: number; vat: number; total: number };
+  getTotal: () => number;
+  getCount: () => number;
 }
 
 export const useCartStore = create<CartState>()(
@@ -32,89 +28,41 @@ export const useCartStore = create<CartState>()(
 
       addItem: (newItem) => {
         set((state) => {
-          const id = `${newItem.slug}-${newItem.label || 'base'}-${newItem.withInstall}`;
-          const existingItem = state.items.find((item) => item.id === id);
-
-          if (existingItem) {
+          const id = newItem.slug;
+          const existing = state.items.find((i) => i.id === id);
+          if (existing) {
             return {
-              items: state.items.map((item) =>
-                item.id === id ? { ...item, quantity: item.quantity + 1 } : item
+              items: state.items.map((i) =>
+                i.id === id ? { ...i, quantity: i.quantity + 1 } : i
               ),
             };
           }
-
           return { items: [...state.items, { ...newItem, id, quantity: 1 }] };
         });
       },
 
-      removeItem: (id) => {
-        set((state) => ({
-          items: state.items.filter((item) => item.id !== id),
-        }));
-      },
+      removeItem: (id) =>
+        set((state) => ({ items: state.items.filter((i) => i.id !== id) })),
 
       updateQuantity: (id, quantity) => {
         if (quantity < 1) return;
         set((state) => ({
-          items: state.items.map((item) =>
-            item.id === id ? { ...item, quantity } : item
-          ),
+          items: state.items.map((i) => (i.id === id ? { ...i, quantity } : i)),
         }));
       },
 
-      toggleInstall: (id) => {
-        set((state) => {
-          const itemToUpdate = state.items.find(item => item.id === id);
-          if (!itemToUpdate) return state;
-
-          const newWithInstall = !itemToUpdate.withInstall;
-          const newId = `${itemToUpdate.slug}-${itemToUpdate.label || 'base'}-${newWithInstall}`;
-
-          const targetExists = state.items.find(item => item.id === newId);
-
-          if (targetExists) {
-             return {
-               items: state.items
-                .map(item => item.id === newId ? { ...item, quantity: item.quantity + itemToUpdate.quantity } : item)
-                .filter(item => item.id !== id)
-             }
-          }
-
-          return {
-            items: state.items.map((item) =>
-              item.id === id ? { ...item, withInstall: newWithInstall, id: newId } : item
-            ),
-          };
-        });
-      },
-
       clearCart: () => set({ items: [] }),
 
-      getTotals: () => {
+      getTotal: () => {
         const { items } = get();
-        let subtotal = 0;
-        let vat = 0;
-        
-        items.forEach((item) => {
-          const itemPrice = item.withInstall ? item.priceWithInstall : item.price;
-          const itemTotalGross = itemPrice * item.quantity;
-          const vatRate = item.withInstall ? 0.08 : 0.23;
-          const itemTotalNet = itemTotalGross / (1 + vatRate);
-          const itemVat = itemTotalGross - itemTotalNet;
+        return items.reduce((sum, i) => sum + i.price * i.quantity, 0);
+      },
 
-          subtotal += itemTotalNet;
-          vat += itemVat;
-        });
-
-        return {
-          subtotal,
-          vat,
-          total: subtotal + vat
-        };
+      getCount: () => {
+        const { items } = get();
+        return items.reduce((sum, i) => sum + i.quantity, 0);
       },
     }),
-    {
-      name: 'air-project-cart',
-    }
+    { name: 'thermcool-cart' }
   )
 );