Wired up CartDrawel and ProductView to cart service and local storage

MidrandBookshop/Components/Layout/MainLayout.razor

@@ -6,7 +6,7 @@
     <div class="cart-drawer @(IsCartOpen ? "is-open" : "") d-flex flex-column bg-white shadow-lg">
         <div class="cart-header d-flex align-items-center justify-content-between p-4 border-bottom">
             <h5 class="fw-bold m-0 text-dark tracking-tight" style="font-family: 'Inter', sans-serif; font-size: 1.1rem;">
-                YOUR CART (@CartItems.Sum(i => i.Quantity))
+                YOUR CART (@ShoppingCart.Items.Count())
             </h5>
             <button class="btn btn-sm text-dark p-1 border-0" @onclick="ToggleCart" type="button">
                 <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
@@ -17,7 +17,7 @@
         </div>
 
         <div class="cart-body flex-grow-1 overflow-y-auto p-4">
-            @if (!CartItems.Any())
+            @if (!ShoppingCart.Items.Any())
             {
                 <div class="h-100 d-flex flex-column align-items-center justify-content-center text-muted py-5">
                     <svg class="mb-3 opacity-50" width="36" height="36" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
@@ -29,22 +29,29 @@
             else
             {
                 <div class="d-flex flex-column gap-4">
-                    @foreach (var item in CartItems)
+                    @foreach (var item in ShoppingCart.Items)
                     {
                         <div class="cart-item d-flex gap-3 align-items-start pb-3 border-bottom-dashed">
                             <div class="cart-item-thumb bg-dark text-white-50 d-flex align-items-center justify-content-center px-2 text-center" style="width: 54px; height: 74px; font-size: 0.45rem; letter-spacing: 0.5px;">
-                                [ COVER ]
+                                @if (!string.IsNullOrWhiteSpace(item.Product!.ImageUrl))
+                                {
+                                    <img src="@item.Product!.ImageUrl" class="img-fluid book-shadow" style="max-height: 240px; object-fit: contain;" alt="@item.Product.Name" />
+                                }
+                                else
+                                {
+                                    @:[COVER]
+                                }
                             </div>
                             <div class="flex-grow-1">
-                                <h6 class="text-dark small fw-bold mb-0 text-truncate" style="max-width: 180px;">@item.Title</h6>
-                                <p class="text-muted xx-small mb-2">by @item.Author</p>
+                                <h6 class="text-dark small fw-bold mb-0 text-truncate" style="max-width: 180px;">@item.Product!.Name</h6>
+                                <p class="text-muted xx-small mb-2">by @($"{item.Author!.Name} {item.Author.LastName}")</p>
                                 <div class="d-flex align-items-center justify-content-between">
                                     <div class="quantity-picker d-flex align-items-center border rounded-pill bg-light">
                                         <button class="btn btn-sm py-0 px-2 text-dark border-0" @onclick="() => ChangeQuantity(item, -1)" type="button">-</button>
-                                        <span class="px-1 text-dark fw-medium" style="font-size: 0.75rem;">@item.Quantity</span>
+                                        <span class="px-1 text-dark fw-medium" style="font-size: 0.75rem;">@ShoppingCart.Items.FirstOrDefault(i => i.Price!.Id == item.Price!.Id)!.Quantity</span>
                                         <button class="btn btn-sm py-0 px-2 text-dark border-0" @onclick="() => ChangeQuantity(item, 1)" type="button">+</button>
                                     </div>
-                                    <span class="small fw-semibold text-dark">R @(item.Price * item.Quantity)</span>
+                                    <span class="small fw-semibold text-dark">R @(item.Price!.Amount * item.Quantity)</span>
                                 </div>
                             </div>
                             <button class="btn text-muted p-0 border-0 mt-1 align-self-start" style="background: none;" @onclick="() => RemoveFromCart(item)" type="button">
@@ -56,7 +63,7 @@
             }
         </div>
 
-        @if (CartItems.Any())
+        @if (ShoppingCart.Items.Any())
         {
             <div class="cart-footer p-4 bg-light border-top mt-auto">
                 <div class="d-flex align-items-center justify-content-between mb-4">
@@ -156,7 +163,7 @@
                         <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75">
                             <path d="M6 2L3 6v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2V6l-3-4z M3 6h18 M16 10a4 4 0 0 1-8 0" />
                         </svg>
-                        @if (CartItems.Any())
+                        @if (ShoppingCart.Items.Any())
                         {
                             <span class="cart-badge">@ShoppingCart.Items.Count</span>
                         }

MidrandBookshop/Components/Layout/MainLayout.razor.cs

@@ -19,13 +19,6 @@ public partial class MainLayout(CartService cartService) : IDisposable
     private bool IsSearchActive { get; set; } = false;
     private bool IsCartOpen { get; set; } = false;
 
-    private List<CartItem> CartItems = new()
-    {
-        new CartItem { Id = 1, Title = "Letters from M/M (Paris)", Author = "M/M Paris", Price = 720, Quantity = 1 },
-        new CartItem { Id = 2, Title = "Daan Paans: Floating Signifiers", Author = "Daan Paans", Price = 540, Quantity = 1 },
-        new CartItem { Id = 3, Title = "Album Architectures, Maputo", Author = "Guedes Archive", Price = 350, Quantity = 1 }
-    };
-
     protected override async Task OnInitializedAsync()
     {
         AuthState = await AuthStateProvider.GetAuthenticationStateAsync();
@@ -111,16 +104,23 @@ public partial class MainLayout(CartService cartService) : IDisposable
 
     private void ToggleCart() => IsCartOpen = !IsCartOpen;
 
-    private void ChangeQuantity(CartItem item, int delta)
+    private async void ChangeQuantity(CartItem item, int delta)
     {
-        item.Quantity += delta;
-        if (item.Quantity <= 0)
-        {
-            CartItems.Remove(item);
-        }
+        var peekQuantity = item.Quantity + delta;
+
+        if (peekQuantity < 1) return;
+
+        cartService.UpdateQuantity(item.Price!.Id, delta);
+
+        await cartService.SaveCartToStorageAsync();
     }
 
-    private void RemoveFromCart(CartItem item) => CartItems.Remove(item);
+    private async void RemoveFromCart(CartItem item)
+    {
+        cartService.RemoveOneItem(item.Price!.Id);
+
+        await cartService.SaveCartToStorageAsync();
+    }
 
     private decimal GetCartTotal() => ShoppingCart?.TotalPrice ?? 0.00m;
 
@@ -143,13 +143,4 @@ public partial class MainLayout(CartService cartService) : IDisposable
 
         GC.SuppressFinalize(this);
     }
-
-    public class CartItem
-    {
-        public int Id { get; set; }
-        public string Title { get; set; } = string.Empty;
-        public string Author { get; set; } = string.Empty;
-        public int Price { get; set; }
-        public int Quantity { get; set; }
-    }
 }

MidrandBookshop/Components/Pages/ProductView.razor.cs

@@ -3,6 +3,7 @@ using LiteCharms.Features.MidrandBooks.Authors;
 using LiteCharms.Features.MidrandBooks.Authors.Models;
 using LiteCharms.Features.MidrandBooks.Products;
 using LiteCharms.Features.MidrandBooks.Products.Models;
+using Microsoft.AspNetCore.Cors.Infrastructure;
 using MidrandBookshop.Services.ShoppingCart;
 
 namespace MidrandBookshop.Components.Pages;
@@ -13,8 +14,10 @@ public partial class ProductView : ComponentBase
 
     [Inject] private ProductService ProductService { get; set; } = default!;
     [Inject] private AuthorService AuthorService { get; set; } = default!;
-    [Inject] private CartService CartService { get; set; } = default!;
     [Inject] private NavigationManager Navigation { get; set; } = default!;
+    [Inject] private CartService CartService { get; set; } = default!;
+
+    protected Services.ShoppingCart.Models.Cart ShoppingCart => CartService?.ShoppingCart!;
 
     protected bool IsLoading { get; private set; } = true;
     protected Product? CurrentProduct { get; private set; }
@@ -29,6 +32,9 @@ public partial class ProductView : ComponentBase
 
     protected Author? CurrentAuthor { get; private set; }
 
+    private static Func<Services.ShoppingCart.Models.Cart, long, int> getCartItemQuantity = (shoppingCart, productPriceId) => 
+        shoppingCart.Items.FirstOrDefault(p => p.Price!.Id == productPriceId)?.Quantity ?? 1;
+
     protected override async Task OnParametersSetAsync()
     {
         try
@@ -85,20 +91,26 @@ public partial class ProductView : ComponentBase
         }
     }
 
-    protected void IncreaseQty()
+    protected async void IncreaseQty()
     {
-        Quantity++;
-
         if (CurrentPrice is not null)
-            CartService.UpdateQuantity(CurrentPrice!.Id, Quantity);
-    }
-    protected void DecreaseQty() 
         {
-        if (Quantity > 1)
-        {
-            Quantity--;
+            CartService.UpdateQuantity(CurrentPrice!.Id, 1);
                         
-            CartService.UpdateQuantity(CurrentPrice!.Id, Quantity);
+            Quantity = getCartItemQuantity(ShoppingCart, CurrentPrice.Id);
+
+            await CartService.SaveCartToStorageAsync();
+        }
+    }
+    protected async void DecreaseQty() 
+    {
+        if (Quantity >= 1)
+        {
+            CartService.UpdateQuantity(CurrentPrice!.Id, -1);
+
+            Quantity = getCartItemQuantity(ShoppingCart, CurrentPrice.Id);
+
+            await CartService.SaveCartToStorageAsync();
         }
     }
 
@@ -108,8 +120,20 @@ public partial class ProductView : ComponentBase
 
         if (CurrentPrice is not null)
         {
-            CartService.AddItem(CurrentPrice);
-            Quantity++;
+            if(ShoppingCart.Items.Any(p => p.Price!.Id == CurrentPrice.Id))
+            {
+                CartService.UpdateQuantity(CurrentPrice.Id, 1);
+
+                await CartService.SaveCartToStorageAsync();
+
+                return;
+            }
+
+            CartService.AddItem(CurrentPrice, CurrentProduct, CurrentAuthor!);
+
+            Quantity = getCartItemQuantity(ShoppingCart, CurrentPrice.Id);
+
+            await CartService.SaveCartToStorageAsync();
         }
     }
 

MidrandBookshop/Services/ShoppingCart/CartService.cs

@@ -1,5 +1,6 @@
 using LiteCharms.Features.Browser;
 using LiteCharms.Features.Hasher;
+using LiteCharms.Features.MidrandBooks.Authors.Models;
 using LiteCharms.Features.MidrandBooks.Products.Models;
 using MidrandBookshop.Services.ShoppingCart.Models;
 
@@ -30,7 +31,7 @@ public sealed class CartService(LocalStorageService localStorage)
 
     public async Task SaveCartToStorageAsync() => await localStorage.SaveAsync(CartStorageKey, ShoppingCart);
 
-    public void AddItem(ProductPrice productPrice)
+    public void AddItem(ProductPrice productPrice, Product product, Author author)
     {
         var itemExists = false;
 
@@ -50,6 +51,8 @@ public sealed class CartService(LocalStorageService localStorage)
         if (!itemExists)
             ShoppingCart.Items.Add(new CartItem
             {
+                Product = product,
+                Author = author,
                 Price = productPrice,
                 Amount = productPrice.Amount,
                 Quantity = 1,
@@ -59,16 +62,8 @@ public sealed class CartService(LocalStorageService localStorage)
         NotifyStateChanged();
     }
 
-    public void UpdateQuantity(long productPriceId, int newQuantity)
+    public void UpdateQuantity(long productPriceId, int delta)
     {
-        if (newQuantity <= 0)
-        {
-            RemoveAllSameItem(productPriceId);
-            NotifyStateChanged();
-
-            return;
-        }
-
         for (var i = 0; i < ShoppingCart.Items.Count; i++)
         {
             if (ShoppingCart.Items[i].Price!.Id == productPriceId)
@@ -76,8 +71,8 @@ public sealed class CartService(LocalStorageService localStorage)
                 var oldQuantity = ShoppingCart.Items[i].Quantity;
                 var pricePerUnit = ShoppingCart.Items[i].Price!.Amount;
 
-                ShoppingCart.Items[i].Quantity = newQuantity;
-                ShoppingCart.Items[i].Amount = pricePerUnit * newQuantity;
+                ShoppingCart.Items[i].Quantity += delta;
+                ShoppingCart.Items[i].Amount = pricePerUnit * ShoppingCart.Items[i].Quantity;
                 break;
             }
         }
@@ -94,7 +89,9 @@ public sealed class CartService(LocalStorageService localStorage)
             {
                 if (ShoppingCart.Items[i].Quantity <= 1)
                 {
-                    ShoppingCart.Items.RemoveAt(i);
+                    ShoppingCart.Items.Remove(ShoppingCart.Items[i]);
+
+                    break;
                 }
                 else
                 {

MidrandBookshop/Services/ShoppingCart/Models/CartItem.cs

@@ -1,12 +1,17 @@
-using LiteCharms.Features.MidrandBooks.Products.Models;
+using LiteCharms.Features.MidrandBooks.Authors.Models;
+using LiteCharms.Features.MidrandBooks.Products.Models;
 
 namespace MidrandBookshop.Services.ShoppingCart.Models;
 
 public sealed class CartItem
 {
+    public Author? Author { get; set; }
+
+    public Product? Product { get; set; }
+
     public ProductPrice? Price { get; set; }
 
-    public long Quantity { get; set; }
+    public int Quantity { get; set; }
 
     public decimal Amount { get; set; }
 }