Api/Brizco.Repository/MartenHandlers/Notifications/GetNotificationsQueryHandler.cs

namespace Brizco.Repository.MartenHandlers.Notifications;

public class GetNotificationsQueryHandler(IMartenRepositoryWrapper martenRepositoryWrapper, ICurrentUserService currentUserService) : IRequestHandler<GetNotificationsQuery,List<Notification>>
{

    public async Task<List<Notification>> Handle(GetNotificationsQuery request, CancellationToken cancellationToken)
    {

        if (currentUserService.ComplexId == null)
            throw new BaseApiException(ApiResultStatusCode.BadRequest, "Complex id is null");
        if (!Guid.TryParse(currentUserService.ComplexId, out Guid complexId))
            throw new BaseApiException(ApiResultStatusCode.BadRequest, "Complex id is wrong");

        Guid userId;
        if (request.UserId == null)
        {
            if (currentUserService.UserId == null)
                throw new BaseApiException(ApiResultStatusCode.BadRequest, "User id is null");
            if (!Guid.TryParse(currentUserService.UserId, out userId))
                throw new BaseApiException(ApiResultStatusCode.BadRequest, "User id is wrong");
        }
        else
            userId = request.UserId.Value;

        if (userId == default)
            throw new BaseApiException(ApiResultStatusCode.BadRequest, "User id is null");

        var count = request.Count ?? 10;

        var notifications = await martenRepositoryWrapper.SetRepository<Notification>()
            .GetEntitiesAsync(n => n.ComplexId == complexId && n.UserId == userId,cancellationToken);
        var response = notifications.OrderByDescending(n=>n.CreatedAt)
            .Take(new Range(request.Page * count, (request.Page * count) + count))
            .ToList();
        return response;
    }
}