Added shared projects

LiteCharms.Features/Customers/Queries/Handlers/GetCustomerRefundsQueryHandler.cs

@@ -0,0 +1,31 @@
+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Customers.Queries.Handlers;
+
+public class GetCustomerRefundsQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetCustomerRefundsQuery, Result<OrderRefund[]>>
+{
+    public async ValueTask<Result<OrderRefund[]>> Handle(GetCustomerRefundsQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            if(!await context.Customers.AnyAsync(c => c.Id == request.CustomerId, cancellationToken))
+                return Result.Fail<OrderRefund[]>(new Error($"Customer with Id {request.CustomerId} does not exist."));
+
+            var refunds = await context.OrderRefunds.AsNoTracking().AsSplitQuery()
+                .OrderByDescending(o => o.CreatedAt)
+                .Where(r => r.Order!.CustomerId == request.CustomerId).ToArrayAsync(cancellationToken);
+
+            return refunds?.Length > 0 
+                ? Result.Ok(refunds.Select(r => r.ToModel()).ToArray()) 
+                : Result.Fail<OrderRefund[]>(new Error($"No refunds found for customer with Id {request.CustomerId}."));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<OrderRefund[]>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}