Added shared projects

LiteCharms.Features/Products/Queries/Handlers/GetProductQueryHandler.cs

@@ -0,0 +1,26 @@
+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Products.Queries.Handlers;
+
+public class GetProductQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetProductQuery, Result<Product>>
+{
+    public async ValueTask<Result<Product>> Handle(GetProductQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var product = await context.Products.FirstOrDefaultAsync(p => p.Id == request.ProductId, cancellationToken);
+
+            return product is not null
+                ? Result.Ok(product.ToModel())
+                : Result.Fail<Product>(new Error($"Product with ID {request.ProductId} not found."));
+        }
+		catch (Exception ex)
+		{
+            return Result.Fail<Product>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}