Retructured solution

LiteCharms.Features/Shop/ShoppingCarts/Commands/Handlers/RemoveShoppingCartItemCommandHandler.cs

@@ -0,0 +1,36 @@
+using LiteCharms.Features.Shop.Postgres;
+
+namespace LiteCharms.Features.ShoppingCarts.Commands.Handlers;
+
+public class RemoveShoppingCartItemCommandHandler(IDbContextFactory<ShopDbContext> contextFactory) : IRequestHandler<RemoveShoppingCartItemCommand, Result>
+{
+    public async ValueTask<Result> Handle(RemoveShoppingCartItemCommand request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            if (!await context.ProductPrices.AnyAsync(c => c.Id == request.ShoppingCartItemId, cancellationToken))
+                return Result.Fail($"Product item could not be found with id {request.ShoppingCartItemId}");
+
+            var cart = await context.ShoppingCarts.FirstOrDefaultAsync(c => c.Id == request.ShoppingCartId, cancellationToken);
+
+            if (cart is null)
+                return Result.Fail($"Shopping cart item could not be found with id {request.ShoppingCartId}");
+
+            var item = await context.ShoppingCartItems.FirstOrDefaultAsync(i => i.Id == request.ShoppingCartItemId, cancellationToken);
+
+            if (item is null) return Result.Ok();
+
+            context.ShoppingCartItems.Remove(item);
+
+            return await context.SaveChangesAsync(cancellationToken) > 0
+                ? Result.Ok()
+                : Result.Fail($"Failed to remove shopping cart item with id {request.ShoppingCartItemId}");
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}