Readarr/src/Lidarr.Api.V3/Logs/LogModule.cs

using NzbDrone.Core.Instrumentation;
using Lidarr.Http;

namespace Lidarr.Api.V3.Logs
{
    public class LogModule : LidarrRestModule<LogResource>
    {
        private readonly ILogService _logService;

        public LogModule(ILogService logService)
        {
            _logService = logService;
            GetResourcePaged = GetLogs;
        }

        private PagingResource<LogResource> GetLogs(PagingResource<LogResource> pagingResource)
        {
            var pageSpec = pagingResource.MapToPagingSpec<LogResource, Log>();

            if (pageSpec.SortKey == "time")
            {
                pageSpec.SortKey = "id";
            }

            if (pagingResource.FilterKey == "level")
            {
                switch (pagingResource.FilterValue)
                {
                    case "Fatal":
                        pageSpec.FilterExpression = h => h.Level == "Fatal";
                        break;
                    case "Error":
                        pageSpec.FilterExpression = h => h.Level == "Fatal" || h.Level == "Error";
                        break;
                    case "Warn":
                        pageSpec.FilterExpression = h => h.Level == "Fatal" || h.Level == "Error" || h.Level == "Warn";
                        break;
                    case "Info":
                        pageSpec.FilterExpression = h => h.Level == "Fatal" || h.Level == "Error" || h.Level == "Warn" || h.Level == "Info";
                        break;
                    case "Debug":
                        pageSpec.FilterExpression = h => h.Level == "Fatal" || h.Level == "Error" || h.Level == "Warn" || h.Level == "Info" || h.Level == "Debug";
                        break;
                    case "Trace":
                        pageSpec.FilterExpression = h => h.Level == "Fatal" || h.Level == "Error" || h.Level == "Warn" || h.Level == "Info" || h.Level == "Debug" || h.Level == "Trace";
                        break;
                }
            }

            var response = ApplyToPage(_logService.Paged, pageSpec, LogResourceMapper.ToResource);

            if (pageSpec.SortKey == "id")
            {
                response.SortKey = "time";
            }

            return response;
        }
    }
}