Implemented shopping carts functionality elements

LiteCharms.Features/ShoppingCarts/Commands/Handlers/EmptyShoppingCartCommandHandler.cs

@@ -0,0 +1,32 @@
+using LiteCharms.Infrastructure.Database;
+
+namespace LiteCharms.Features.ShoppingCarts.Commands.Handlers;
+
+public class EmptyShoppingCartCommandHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<EmptyShoppingCartCommand, Result>
+{
+    public async ValueTask<Result> Handle(EmptyShoppingCartCommand request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            if (!await context.ShoppingCarts.AnyAsync(c => c.Id == request.ShoppingCartId, cancellationToken))
+                return Result.Fail($"Shopping could not be found with id {request.ShoppingCartId}");
+
+            if (await context.ShoppingCartItems.CountAsync(i => i.ShoppingCartId == request.ShoppingCartId, cancellationToken) == 0)
+                return Result.Ok();
+
+            var cartItems = await context.ShoppingCartItems.Where(i => i.ShoppingCartId == request.ShoppingCartId).ToListAsync(cancellationToken);
+
+            context.RemoveRange(cartItems);
+
+            return await context.SaveChangesAsync(cancellationToken) > 0
+                ? Result.Ok()
+                : Result.Fail($"Could not empty cart with id {request.ShoppingCartId}");
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}