Retructured solution

LiteCharms.Features/Shop/Notifications/Queries/Handlers/GetNotificationQueryHandler.cs

@@ -0,0 +1,26 @@
+using LiteCharms.Extensions;
+using LiteCharms.Features.Shop.Notifications.Models;
+using LiteCharms.Features.Shop.Postgres;
+
+namespace LiteCharms.Features.Notifications.Queries.Handlers;
+
+public class GetNotificationQueryHandler(IDbContextFactory<ShopDbContext> contextFactory) : IRequestHandler<GetNotificationQuery, Result<Notification>>
+{
+    public async ValueTask<Result<Notification>> Handle(GetNotificationQuery request, CancellationToken cancellationToken)
+    {
+        try
+        {
+            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var notification = await context.Notifications.FirstOrDefaultAsync(n => n.Id == request.NotificationId, cancellationToken);
+
+            return notification is not null 
+                ? Result.Ok(notification.ToModel())
+                : Result.Fail<Notification>(new Error($"Notification with id {request.NotificationId} not found"));
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail<Notification>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}