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

using Brizco.Domain.MartenEntities.Notifications;

namespace Brizco.Repository.MartenHandlers.Notifications;

public class GetNotificationsQueryHandler : IRequestHandler<GetNotificationsQuery,List<Notification>>
{
    private readonly IMartenRepositoryWrapper _martenRepositoryWrapper;
    private readonly ICurrentUserService _currentUserService;

    public GetNotificationsQueryHandler(IMartenRepositoryWrapper martenRepositoryWrapper,ICurrentUserService currentUserService)
    {
        _martenRepositoryWrapper = martenRepositoryWrapper;
        _currentUserService = currentUserService;
    }

    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");

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

        var notifications = await _martenRepositoryWrapper.SetRepository<Notification>()
            .GetQueryAsync(n => n.ComplexId == complexId && n.UserId == userId);
        var response = await notifications.Take(new Range(request.Page * request.Count, (request.Page * request.Count) + request.Count))
            .ToListAsync(cancellationToken);

        return response;
    }
}