New: App health displayed in UI

src/NzbDrone.Api/Health/HealthModule.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using NzbDrone.Core.Datastore.Events;
+using NzbDrone.Core.HealthCheck;
+using NzbDrone.Core.Messaging.Commands;
+using NzbDrone.Core.Messaging.Events;
+
+namespace NzbDrone.Api.Health
+{
+    public class HealthModule : NzbDroneRestModuleWithSignalR<HealthResource, HealthCheck>,
+                                IHandle<TriggerHealthCheckEvent>
+    {
+        private readonly IHealthCheckService _healthCheckService;
+
+        public HealthModule(ICommandExecutor commandExecutor, IHealthCheckService healthCheckService)
+            : base(commandExecutor)
+        {
+            _healthCheckService = healthCheckService;
+            GetResourceAll = GetHealth;
+        }
+
+        private List<HealthResource> GetHealth()
+        {
+            return ToListResource(_healthCheckService.PerformHealthCheck);
+        }
+
+        public void Handle(TriggerHealthCheckEvent message)
+        {
+            BroadcastResourceChange(ModelAction.Sync);
+        }
+    }
+}

src/NzbDrone.Api/Health/HistoryResource.cs

@@ -0,0 +1,13 @@
+using System;
+using NzbDrone.Api.REST;
+using NzbDrone.Core.HealthCheck;
+
+
+namespace NzbDrone.Api.Health
+{
+    public class HealthResource : RestResource
+    {
+        public HealthCheckResultType Type { get; set; }
+        public String Message { get; set; }
+    }
+}

src/NzbDrone.Api/NzbDrone.Api.csproj

@@ -132,6 +132,8 @@
     <Compile Include="Frontend\Mappers\IMapHttpRequestsToDisk.cs" />
     <Compile Include="Frontend\Mappers\StaticResourceMapperBase.cs" />
     <Compile Include="Frontend\StaticResourceModule.cs" />
+    <Compile Include="Health\HistoryResource.cs" />
+    <Compile Include="Health\HealthModule.cs" />
     <Compile Include="History\HistoryResource.cs" />
     <Compile Include="History\HistoryModule.cs" />
     <Compile Include="Metadata\MetadataResource.cs" />

src/NzbDrone.Automation.Test/PageModel/PageBase.cs

@@ -92,7 +92,7 @@ namespace NzbDrone.Automation.Test.PageModel
         {
             get
             {
-                return Find(By.LinkText("System"));
+                return Find(By.PartialLinkText("System"));
             }
         }
 

src/NzbDrone.Common/StringExtensions.cs

@@ -52,5 +52,10 @@ namespace NzbDrone.Common
         {
             return CollapseSpace.Replace(text, " ").Trim();
         }
+
+        public static bool IsNullOrWhiteSpace(this string text)
+        {
+            return String.IsNullOrWhiteSpace(text);
+        }
     }
 }

src/NzbDrone.Core.Test/HealthCheck/Checks/DownloadClientCheckFixture.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using FluentAssertions;
+using NUnit.Framework;
+using NzbDrone.Core.Download;
+using NzbDrone.Core.HealthCheck.Checks;
+using NzbDrone.Core.Test.Framework;
+
+namespace NzbDrone.Core.Test.HealthCheck.Checks
+{
+    [TestFixture]
+    public class DownloadClientCheckFixture : CoreTest<DownloadClientCheck>
+    {
+        [Test]
+        public void should_return_warning_when_download_client_has_not_been_configured()
+        {
+            Mocker.GetMock<IProvideDownloadClient>()
+                  .Setup(s => s.GetDownloadClient())
+                  .Returns((IDownloadClient)null);
+
+            Subject.Check().ShouldBeWarning();
+        }
+
+        [Test]
+        public void should_return_error_when_download_client_throws()
+        {
+            var downloadClient = Mocker.GetMock<IDownloadClient>();
+
+            downloadClient.Setup(s => s.GetQueue())
+                          .Throws<Exception>();
+
+            Mocker.GetMock<IProvideDownloadClient>()
+                  .Setup(s => s.GetDownloadClient())
+                  .Returns(downloadClient.Object);
+
+            Subject.Check().ShouldBeError();
+        }
+
+        [Test]
+        public void should_return_null_when_download_client_returns()
+        {
+            var downloadClient = Mocker.GetMock<IDownloadClient>();
+
+            downloadClient.Setup(s => s.GetQueue())
+                          .Returns(new List<QueueItem>());
+
+            Mocker.GetMock<IProvideDownloadClient>()
+                  .Setup(s => s.GetDownloadClient())
+                  .Returns(downloadClient.Object);
+
+            Subject.Check().Should().BeNull();
+        }
+    }
+}

src/NzbDrone.Core.Test/HealthCheck/Checks/DroneFactoryCheckFixture.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using FluentAssertions;
+using Moq;
+using NUnit.Framework;
+using NzbDrone.Common.Disk;
+using NzbDrone.Core.Configuration;
+using NzbDrone.Core.HealthCheck.Checks;
+using NzbDrone.Core.Test.Framework;
+
+namespace NzbDrone.Core.Test.HealthCheck.Checks
+{
+    [TestFixture]
+    public class DroneFactoryCheckFixture : CoreTest<DroneFactoryCheck>
+    {
+        private const string DRONE_FACTORY_FOLDER = @"C:\Test\Unsorted";
+
+        private void GivenDroneFactoryFolder(bool exists = false)
+        {
+            Mocker.GetMock<IConfigService>()
+                  .SetupGet(s => s.DownloadedEpisodesFolder)
+                  .Returns(DRONE_FACTORY_FOLDER);
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(s => s.FolderExists(DRONE_FACTORY_FOLDER))
+                  .Returns(exists);
+        }
+
+        [Test]
+        public void should_return_warning_when_drone_factory_folder_is_not_configured()
+        {
+            Mocker.GetMock<IConfigService>()
+                  .SetupGet(s => s.DownloadedEpisodesFolder)
+                  .Returns("");
+
+            Subject.Check().ShouldBeWarning();
+        }
+
+        [Test]
+        public void should_return_error_when_drone_factory_folder_does_not_exist()
+        {
+            GivenDroneFactoryFolder();
+
+            Subject.Check().ShouldBeError();
+        }
+
+        [Test]
+        public void should_return_error_when_unable_to_write_to_drone_factory_folder()
+        {
+            GivenDroneFactoryFolder(true);
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(s => s.WriteAllText(It.IsAny<String>(), It.IsAny<String>()))
+                  .Throws<Exception>();
+
+            Subject.Check().ShouldBeError();
+        }
+
+        [Test]
+        public void should_return_null_when_no_issues_found()
+        {
+            GivenDroneFactoryFolder(true);
+
+            Subject.Check().Should().BeNull();
+        }
+    }
+}

src/NzbDrone.Core.Test/HealthCheck/Checks/HealthCheckFixtureExtentions.cs

@@ -0,0 +1,18 @@
+using FluentAssertions;
+using NzbDrone.Core.HealthCheck;
+
+namespace NzbDrone.Core.Test.HealthCheck.Checks
+{
+    public static class HealthCheckFixtureExtensions
+    {
+        public static void ShouldBeWarning(this Core.HealthCheck.HealthCheck result)
+        {
+            result.Type.Should().Be(HealthCheckResultType.Warning);
+        }
+
+        public static void ShouldBeError(this Core.HealthCheck.HealthCheck result)
+        {
+            result.Type.Should().Be(HealthCheckResultType.Error);
+        }
+    }
+}

src/NzbDrone.Core.Test/HealthCheck/Checks/IndexerCheckFixture.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using FizzWare.NBuilder;
+using FluentAssertions;
+using NUnit.Framework;
+using NzbDrone.Core.Download;
+using NzbDrone.Core.HealthCheck.Checks;
+using NzbDrone.Core.Indexers;
+using NzbDrone.Core.Test.Framework;
+
+namespace NzbDrone.Core.Test.HealthCheck.Checks
+{
+    [TestFixture]
+    public class IndexerCheckFixture : CoreTest<IndexerCheck>
+    {
+        [Test]
+        public void should_return_error_when_not_indexers_are_enabled()
+        {
+            Mocker.GetMock<IIndexerFactory>()
+                  .Setup(s => s.GetAvailableProviders())
+                  .Returns(new List<IIndexer>());
+
+            Subject.Check().ShouldBeError();
+        }
+
+        [Test]
+        public void should_return_warning_when_only_enabled_indexer_is_wombles()
+        {
+            var indexer = Mocker.GetMock<IIndexer>();
+            indexer.SetupGet(s => s.SupportsSearching).Returns(false);
+
+            Mocker.GetMock<IIndexerFactory>()
+                  .Setup(s => s.GetAvailableProviders())
+                  .Returns(new List<IIndexer>{indexer.Object});
+
+            Subject.Check().ShouldBeWarning();
+        }
+
+        [Test]
+        public void should_return_null_when_multiple_multiple_indexers_are_enabled()
+        {
+            var indexers = new List<IIndexer>{Mocker.GetMock<IIndexer>().Object, Mocker.GetMock<IIndexer>().Object};
+
+            Mocker.GetMock<IIndexerFactory>()
+                  .Setup(s => s.GetAvailableProviders())
+                  .Returns(indexers);
+
+            Subject.Check().Should().BeNull();
+        }
+    }
+}

src/NzbDrone.Core.Test/HealthCheck/Checks/UpdateCheckFixture.cs

@@ -0,0 +1,30 @@
+using System;
+using Moq;
+using NUnit.Framework;
+using NzbDrone.Common.Disk;
+using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Core.HealthCheck.Checks;
+using NzbDrone.Core.Test.Framework;
+
+namespace NzbDrone.Core.Test.HealthCheck.Checks
+{
+    [TestFixture]
+    public class UpdateCheckFixture : CoreTest<UpdateCheck>
+    {
+        [Test]
+        public void should_return_error_when_app_folder_is_write_protected()
+        {
+            WindowsOnly();
+
+            Mocker.GetMock<IAppFolderInfo>()
+                  .Setup(s => s.StartUpFolder)
+                  .Returns(@"C:\NzbDrone");
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(s => s.WriteAllText(It.IsAny<String>(), It.IsAny<String>()))
+                  .Throws<Exception>();
+
+            Subject.Check().ShouldBeError();
+        }
+    }
+}

src/NzbDrone.Core.Test/NzbDrone.Core.Test.csproj

@@ -125,6 +125,11 @@
     <Compile Include="Framework\CoreTest.cs" />
     <Compile Include="Framework\DbTest.cs" />
     <Compile Include="Framework\NBuilderExtensions.cs" />
+    <Compile Include="HealthCheck\Checks\UpdateCheckFixture.cs" />
+    <Compile Include="HealthCheck\Checks\IndexerCheckFixture.cs" />
+    <Compile Include="HealthCheck\Checks\DroneFactoryCheckFixture.cs" />
+    <Compile Include="HealthCheck\Checks\DownloadClientCheckFixture.cs" />
+    <Compile Include="HealthCheck\Checks\HealthCheckFixtureExtentions.cs" />
     <Compile Include="HistoryTests\HistoryServiceFixture.cs" />
     <Compile Include="Housekeeping\Housekeepers\CleanupOrphanedHistoryItemsFixture.cs" />
     <Compile Include="Housekeeping\Housekeepers\CleanupOrphanedEpisodeFilesFixture.cs" />

src/NzbDrone.Core/Download/Clients/Blackhole/Blackhole.cs

@@ -58,11 +58,21 @@ namespace NzbDrone.Core.Download.Clients.Blackhole
         {
         }
 
-        public void Execute(TestBlackholeCommand message)
+        public override void Test()
+        {
+            PerformTest(Settings.Folder);
+        }
+
+        private void PerformTest(string folder)
         {
-            var testPath = Path.Combine(message.Folder, "drone_test.txt");
+            var testPath = Path.Combine(folder, "drone_test.txt");
             _diskProvider.WriteAllText(testPath, DateTime.Now.ToString());
             _diskProvider.DeleteFile(testPath);
         }
+
+        public void Execute(TestBlackholeCommand message)
+        {
+            PerformTest(message.Folder);
+        }
     }
 }

src/NzbDrone.Core/Download/Clients/Nzbget/Nzbget.cs

@@ -80,7 +80,12 @@ namespace NzbDrone.Core.Download.Clients.Nzbget
             throw new NotImplementedException();
         }
 
-        public VersionResponse GetVersion(string host = null, int port = 0, string username = null, string password = null)
+        public override void Test()
+        {
+            _proxy.GetVersion(Settings);
+        }
+
+        private VersionResponse GetVersion(string host = null, int port = 0, string username = null, string password = null)
         {
             return _proxy.GetVersion(Settings);
         }

src/NzbDrone.Core/Download/Clients/Pneumatic/Pneumatic.cs

@@ -80,11 +80,21 @@ namespace NzbDrone.Core.Download.Clients.Pneumatic
         {
         }
 
-        public void Execute(TestPneumaticCommand message)
+        public override void Test()
+        {
+            PerformTest(Settings.Folder);
+        }
+
+        private void PerformTest(string folder)
         {
-            var testPath = Path.Combine(message.Folder, "drone_test.txt");
+            var testPath = Path.Combine(folder, "drone_test.txt");
             _diskProvider.WriteAllText(testPath, DateTime.Now.ToString());
             _diskProvider.DeleteFile(testPath);
         }
+
+        public void Execute(TestPneumaticCommand message)
+        {
+            PerformTest(message.Folder);
+        }
     }
 }

src/NzbDrone.Core/Download/Clients/Sabnzbd/Sabnzbd.cs

@@ -122,6 +122,11 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
             _sabnzbdProxy.RemoveFrom("history", id, Settings);
         }
 
+        public override void Test()
+        {
+            _sabnzbdProxy.GetCategories(Settings);
+        }
+
         public void Execute(TestSabnzbdCommand message)
         {
             var settings = new SabnzbdSettings();

src/NzbDrone.Core/Download/DownloadClientBase.cs

@@ -44,5 +44,6 @@ namespace NzbDrone.Core.Download
         public abstract IEnumerable<HistoryItem> GetHistory(int start = 0, int limit = 10);
         public abstract void RemoveFromQueue(string id);
         public abstract void RemoveFromHistory(string id);
+        public abstract void Test();
     }
 }

src/NzbDrone.Core/Download/DownloadClientFactory.cs

@@ -2,6 +2,7 @@
 using System.Linq;
 using NLog;
 using NzbDrone.Common.Composition;
+using NzbDrone.Core.Messaging.Events;
 using NzbDrone.Core.ThingiProvider;
 
 namespace NzbDrone.Core.Download
@@ -15,8 +16,8 @@ namespace NzbDrone.Core.Download
     {
         private readonly IDownloadClientRepository _providerRepository;
 
-        public DownloadClientFactory(IDownloadClientRepository providerRepository, IEnumerable<IDownloadClient> providers, IContainer container, Logger logger)
-            : base(providerRepository, providers, container, logger)
+        public DownloadClientFactory(IDownloadClientRepository providerRepository, IEnumerable<IDownloadClient> providers, IContainer container, IEventAggregator eventAggregator, Logger logger)
+            : base(providerRepository, providers, container, eventAggregator, logger)
         {
             _providerRepository = providerRepository;
         }

src/NzbDrone.Core/Download/DownloadClientProvider.cs

@@ -1,9 +1,4 @@
-using System.Collections.Generic;
-using System.Linq;
-using NzbDrone.Core.Configuration;
-using NzbDrone.Core.Download.Clients;
-using NzbDrone.Core.Download.Clients.Nzbget;
-using NzbDrone.Core.Download.Clients.Sabnzbd;
+using System.Linq;
 
 namespace NzbDrone.Core.Download
 {

src/NzbDrone.Core/Download/IDownloadClient.cs

@@ -11,5 +11,6 @@ namespace NzbDrone.Core.Download
         IEnumerable<HistoryItem> GetHistory(int start = 0, int limit = 0);
         void RemoveFromQueue(string id);
         void RemoveFromHistory(string id);
+        void Test();
     }
 }

src/NzbDrone.Core/HealthCheck/CheckHealthCommand.cs

@@ -0,0 +1,8 @@
+using NzbDrone.Core.Messaging.Commands;
+
+namespace NzbDrone.Core.HealthCheck
+{
+    public class CheckHealthCommand : Command
+    {
+    }
+}

src/NzbDrone.Core/HealthCheck/Checks/DownloadClientCheck.cs

@@ -0,0 +1,36 @@
+using System;
+using NzbDrone.Core.Download;
+
+namespace NzbDrone.Core.HealthCheck.Checks
+{
+    public class DownloadClientCheck : IProvideHealthCheck
+    {
+        private readonly IProvideDownloadClient _downloadClientProvider;
+
+        public DownloadClientCheck(IProvideDownloadClient downloadClientProvider)
+        {
+            _downloadClientProvider = downloadClientProvider;
+        }
+
+        public HealthCheck Check()
+        {
+            var downloadClient = _downloadClientProvider.GetDownloadClient();
+
+            if (downloadClient == null)
+            {
+                return new HealthCheck(HealthCheckResultType.Warning, "No download client is available");
+            }
+
+            try
+            {
+                downloadClient.GetQueue();
+            }
+            catch (Exception)
+            {
+                return new HealthCheck(HealthCheckResultType.Error, "Unable to communicate with download client");
+            }
+
+            return null;
+        }
+    }
+}

src/NzbDrone.Core/HealthCheck/Checks/DroneFactoryCheck.cs

@@ -0,0 +1,50 @@
+using System;
+using System.IO;
+using NzbDrone.Common;
+using NzbDrone.Common.Disk;
+using NzbDrone.Core.Configuration;
+
+namespace NzbDrone.Core.HealthCheck.Checks
+{
+    public class DroneFactoryCheck : IProvideHealthCheck
+    {
+        private readonly IConfigService _configService;
+        private readonly IDiskProvider _diskProvider;
+
+        public DroneFactoryCheck(IConfigService configService, IDiskProvider diskProvider)
+        {
+            _configService = configService;
+            _diskProvider = diskProvider;
+        }
+
+        public HealthCheck Check()
+        {
+            var droneFactoryFolder = _configService.DownloadedEpisodesFolder;
+
+            if (droneFactoryFolder.IsNullOrWhiteSpace())
+            {
+                return new HealthCheck(HealthCheckResultType.Warning, "Drone factory folder is not configured");
+            }
+
+            if (!_diskProvider.FolderExists(droneFactoryFolder))
+            {
+                return new HealthCheck(HealthCheckResultType.Error, "Drone factory folder does not exist");
+            }
+            
+            try
+            {
+                var testPath = Path.Combine(droneFactoryFolder, "drone_test.txt");
+                _diskProvider.WriteAllText(testPath, DateTime.Now.ToString());
+                _diskProvider.DeleteFile(testPath);
+            }
+            catch (Exception)
+            {
+                return new HealthCheck(HealthCheckResultType.Error, "Unable to write to drone factory folder");
+            }
+
+            //Todo: Unable to import one or more files/folders from
+
+            return null;
+        }
+    }
+}

src/NzbDrone.Core/HealthCheck/Checks/IndexerCheck.cs

@@ -0,0 +1,34 @@
+using System.Linq;
+using NzbDrone.Core.Indexers;
+
+namespace NzbDrone.Core.HealthCheck.Checks
+{
+    public class IndexerCheck : IProvideHealthCheck
+    {
+        private readonly IIndexerFactory _indexerFactory;
+
+        public IndexerCheck(IIndexerFactory indexerFactory)
+        {
+            _indexerFactory = indexerFactory;
+        }
+
+        public HealthCheck Check()
+        {
+            var enabled = _indexerFactory.GetAvailableProviders();
+
+            if (!enabled.Any())
+            {
+                return new HealthCheck(HealthCheckResultType.Error, "No indexers are enabled");
+            }
+
+            
+
+            if (enabled.All(i => i.SupportsSearching == false))
+            {
+                return new HealthCheck(HealthCheckResultType.Warning, "Enabled indexers do not support searching");
+            }
+
+            return null;
+        }
+    }
+}

src/NzbDrone.Core/HealthCheck/Checks/UpdateCheck.cs

@@ -0,0 +1,51 @@
+using System;
+using System.IO;
+using NzbDrone.Common.Disk;
+using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Core.Update;
+
+namespace NzbDrone.Core.HealthCheck.Checks
+{
+    public class UpdateCheck : IProvideHealthCheck
+    {
+        private readonly IDiskProvider _diskProvider;
+        private readonly IAppFolderInfo _appFolderInfo;
+        private readonly ICheckUpdateService _checkUpdateService;
+
+        public UpdateCheck(IDiskProvider diskProvider, IAppFolderInfo appFolderInfo, ICheckUpdateService checkUpdateService)
+        {
+            _diskProvider = diskProvider;
+            _appFolderInfo = appFolderInfo;
+            _checkUpdateService = checkUpdateService;
+        }
+
+
+        public HealthCheck Check()
+        {
+            if (OsInfo.IsWindows)
+            {
+                try
+                {
+                    var testPath = Path.Combine(_appFolderInfo.StartUpFolder, "drone_test.txt");
+                    _diskProvider.WriteAllText(testPath, DateTime.Now.ToString());
+                    _diskProvider.DeleteFile(testPath);
+                }
+                catch (Exception)
+                {
+                    return new HealthCheck(HealthCheckResultType.Error,
+                        "Unable to update, running from write-protected folder");
+                }
+            }
+
+            if (BuildInfo.BuildDateTime < DateTime.UtcNow.AddDays(-14))
+            {
+                if (_checkUpdateService.AvailableUpdate() != null)
+                {
+                    return new HealthCheck(HealthCheckResultType.Warning, "New update is available");
+                }
+            }
+
+            return null;
+        }
+    }
+}

src/NzbDrone.Core/HealthCheck/HealthCheck.cs

@@ -0,0 +1,23 @@
+using System;
+using NzbDrone.Core.Datastore;
+
+namespace NzbDrone.Core.HealthCheck
+{
+    public class HealthCheck : ModelBase
+    {
+        public HealthCheckResultType Type { get; set; }
+        public String Message { get; set; }
+
+        public HealthCheck(HealthCheckResultType type, string message)
+        {
+            Type = type;
+            Message = message;
+        }
+    }
+
+    public enum HealthCheckResultType
+    {
+        Warning = 1,
+        Error = 2
+    }
+}

src/NzbDrone.Core/HealthCheck/HealthCheckService.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using NLog;
+using NzbDrone.Core.Configuration.Events;
+using NzbDrone.Core.Download;
+using NzbDrone.Core.Indexers;
+using NzbDrone.Core.Messaging.Commands;
+using NzbDrone.Core.Messaging.Events;
+using NzbDrone.Core.ThingiProvider.Events;
+
+namespace NzbDrone.Core.HealthCheck
+{
+    public interface IHealthCheckService
+    {
+        List<HealthCheck> PerformHealthCheck();
+    }
+
+    public class HealthCheckService : IHealthCheckService,
+                                      IExecute<CheckHealthCommand>,
+                                      IHandleAsync<ConfigSavedEvent>,
+                                      IHandleAsync<ProviderUpdatedEvent<IIndexer>>,
+                                      IHandleAsync<ProviderUpdatedEvent<IDownloadClient>>
+    {
+        private readonly IEnumerable<IProvideHealthCheck> _healthChecks;
+        private readonly IEventAggregator _eventAggregator;
+        private readonly Logger _logger;
+
+        public HealthCheckService(IEnumerable<IProvideHealthCheck> healthChecks, IEventAggregator eventAggregator, Logger logger)
+        {
+            _healthChecks = healthChecks;
+            _eventAggregator = eventAggregator;
+            _logger = logger;
+        }
+
+        public List<HealthCheck> PerformHealthCheck()
+        {
+            _logger.Trace("Checking health");
+            var result = _healthChecks.Select(c => c.Check()).Where(c => c != null).ToList();
+            
+            return result;
+        }
+
+        public void Execute(CheckHealthCommand message)
+        {
+            //Until we have stored health checks we should just trigger the complete event
+            //and let the clients check in
+            //Multiple connected clients means we're going to compute the health check multiple times
+            //Multiple checks feels a bit ugly, but means the most up to date information goes to the client
+            _eventAggregator.PublishEvent(new TriggerHealthCheckEvent());
+        }
+
+        public void HandleAsync(ConfigSavedEvent message)
+        {
+            _eventAggregator.PublishEvent(new TriggerHealthCheckEvent());
+        }
+
+        public void HandleAsync(ProviderUpdatedEvent<IIndexer> message)
+        {
+            _eventAggregator.PublishEvent(new TriggerHealthCheckEvent());
+        }
+
+        public void HandleAsync(ProviderUpdatedEvent<IDownloadClient> message)
+        {
+            _eventAggregator.PublishEvent(new TriggerHealthCheckEvent());
+        }
+    }
+}

src/NzbDrone.Core/HealthCheck/IProvideHealthCheck.cs

@@ -0,0 +1,7 @@
+namespace NzbDrone.Core.HealthCheck
+{
+    public interface IProvideHealthCheck
+    {
+        HealthCheck Check();
+    }
+}

src/NzbDrone.Core/HealthCheck/TriggerHealthCheckEvent.cs

@@ -0,0 +1,8 @@
+using NzbDrone.Common.Messaging;
+
+namespace NzbDrone.Core.HealthCheck
+{
+    public class TriggerHealthCheckEvent : IEvent
+    {
+    }
+}

src/NzbDrone.Core/Indexers/IIndexer.cs

@@ -9,6 +9,7 @@ namespace NzbDrone.Core.Indexers
         IParseFeed Parser { get; }
         DownloadProtocol Protocol { get; }
         Boolean SupportsPaging { get; }
+        Boolean SupportsSearching { get; }
 
         IEnumerable<string> RecentFeed { get; }
         IEnumerable<string> GetEpisodeSearchUrls(string seriesTitle, int tvRageId, int seasonNumber, int episodeNumber);

src/NzbDrone.Core/Indexers/IndexerBase.cs

@@ -35,6 +35,7 @@ namespace NzbDrone.Core.Indexers
         public abstract DownloadProtocol Protocol { get; }
 
         public abstract bool SupportsPaging { get; }
+        public virtual bool SupportsSearching { get { return true; } }
 
         protected TSettings Settings
         {

src/NzbDrone.Core/Indexers/IndexerFactory.cs

@@ -2,6 +2,7 @@
 using System.Linq;
 using NLog;
 using NzbDrone.Common.Composition;
+using NzbDrone.Core.Messaging.Events;
 using NzbDrone.Core.ThingiProvider;
 
 namespace NzbDrone.Core.Indexers
@@ -16,8 +17,8 @@ namespace NzbDrone.Core.Indexers
         private readonly IIndexerRepository _providerRepository;
         private readonly INewznabTestService _newznabTestService;
 
-        public IndexerFactory(IIndexerRepository providerRepository, IEnumerable<IIndexer> providers, IContainer container, INewznabTestService newznabTestService, Logger logger)
-            : base(providerRepository, providers, container, logger)
+        public IndexerFactory(IIndexerRepository providerRepository, IEnumerable<IIndexer> providers, IContainer container, IEventAggregator eventAggregator, INewznabTestService newznabTestService, Logger logger)
+            : base(providerRepository, providers, container, eventAggregator, logger)
         {
             _providerRepository = providerRepository;
             _newznabTestService = newznabTestService;

src/NzbDrone.Core/Indexers/Wombles/Wombles.cs

@@ -22,6 +22,14 @@ namespace NzbDrone.Core.Indexers.Wombles
             }
         }
 
+        public override bool SupportsSearching
+        {
+            get
+            {
+                return false;
+            }
+        }
+
         public override IParseFeed Parser
         {
             get

src/NzbDrone.Core/Jobs/TaskManager.cs

@@ -7,6 +7,7 @@ using NzbDrone.Core.Configuration.Events;
 using NzbDrone.Core.DataAugmentation.Scene;
 using NzbDrone.Core.DataAugmentation.Xem;
 using NzbDrone.Core.Download;
+using NzbDrone.Core.HealthCheck;
 using NzbDrone.Core.Housekeeping;
 using NzbDrone.Core.Indexers;
 using NzbDrone.Core.Instrumentation.Commands;
@@ -50,6 +51,7 @@ namespace NzbDrone.Core.Jobs
                     new ScheduledTask{ Interval = 1, TypeName = typeof(DownloadedEpisodesScanCommand).FullName},
                     new ScheduledTask{ Interval = 1, TypeName = typeof(TrackedCommandCleanupCommand).FullName},
                     new ScheduledTask{ Interval = 1, TypeName = typeof(CheckForFailedDownloadCommand).FullName},
+                    new ScheduledTask{ Interval = 5, TypeName = typeof(CheckHealthCommand).FullName},
                     new ScheduledTask{ Interval = 1*60, TypeName = typeof(ApplicationUpdateCommand).FullName},
                     new ScheduledTask{ Interval = 1*60, TypeName = typeof(TrimLogCommand).FullName},
                     new ScheduledTask{ Interval = 3*60, TypeName = typeof(UpdateSceneMappingCommand).FullName},

src/NzbDrone.Core/MetaData/MetadataFactory.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using NLog;
 using NzbDrone.Common.Composition;
+using NzbDrone.Core.Messaging.Events;
 using NzbDrone.Core.Metadata.Consumers.Fake;
 using NzbDrone.Core.ThingiProvider;
 
@@ -17,8 +18,8 @@ namespace NzbDrone.Core.Metadata
     {
         private readonly IMetadataRepository _providerRepository;
 
-        public MetadataFactory(IMetadataRepository providerRepository, IEnumerable<IMetadata> providers, IContainer container, Logger logger)
-            : base(providerRepository, providers, container, logger)
+        public MetadataFactory(IMetadataRepository providerRepository, IEnumerable<IMetadata> providers, IContainer container, IEventAggregator eventAggregator, Logger logger)
+            : base(providerRepository, providers, container, eventAggregator, logger)
         {
             _providerRepository = providerRepository;
         }

src/NzbDrone.Core/Notifications/NotificationFactory.cs

@@ -2,6 +2,7 @@
 using System.Linq;
 using NLog;
 using NzbDrone.Common.Composition;
+using NzbDrone.Core.Messaging.Events;
 using NzbDrone.Core.ThingiProvider;
 
 namespace NzbDrone.Core.Notifications
@@ -15,8 +16,8 @@ namespace NzbDrone.Core.Notifications
 
     public class NotificationFactory : ProviderFactory<INotification, NotificationDefinition>, INotificationFactory
     {
-        public NotificationFactory(INotificationRepository providerRepository, IEnumerable<INotification> providers, IContainer container, Logger logger)
-            : base(providerRepository, providers, container, logger)
+        public NotificationFactory(INotificationRepository providerRepository, IEnumerable<INotification> providers, IContainer container, IEventAggregator eventAggregator, Logger logger)
+            : base(providerRepository, providers, container, eventAggregator, logger)
         {
         }
 

src/NzbDrone.Core/NzbDrone.Core.csproj

@@ -264,6 +264,13 @@
     <Compile Include="Exceptions\DownstreamException.cs" />
     <Compile Include="Exceptions\NzbDroneClientException.cs" />
     <Compile Include="Exceptions\StatusCodeToExceptions.cs" />
+    <Compile Include="HealthCheck\CheckHealthCommand.cs" />
+    <Compile Include="HealthCheck\Checks\DownloadClientCheck.cs" />
+    <Compile Include="HealthCheck\Checks\DroneFactoryCheck.cs" />
+    <Compile Include="HealthCheck\Checks\IndexerCheck.cs" />
+    <Compile Include="HealthCheck\Checks\UpdateCheck.cs" />
+    <Compile Include="HealthCheck\HealthCheck.cs" />
+    <Compile Include="HealthCheck\TriggerHealthCheckEvent.cs" />
     <Compile Include="Housekeeping\Housekeepers\CleanupOrphanedEpisodes.cs" />
     <Compile Include="Housekeeping\Housekeepers\CleanupOrphanedHistoryItems.cs" />
     <Compile Include="Housekeeping\Housekeepers\CleanupOrphanedMetadataFiles.cs" />
@@ -342,6 +349,8 @@
     <Compile Include="Metadata\MetadataRepository.cs" />
     <Compile Include="Metadata\MetadataService.cs" />
     <Compile Include="Metadata\MetadataType.cs" />
+    <Compile Include="HealthCheck\HealthCheckService.cs" />
+    <Compile Include="HealthCheck\IProvideHealthCheck.cs" />
     <Compile Include="Notifications\NotificationFactory.cs" />
     <Compile Include="Notifications\NotificationService.cs" />
     <Compile Include="Notifications\DownloadMessage.cs" />
@@ -503,6 +512,7 @@
     <Compile Include="Rest\JsonNetSerializer.cs" />
     <Compile Include="RootFolders\RootFolderRepository.cs" />
     <Compile Include="ThingiProvider\ConfigContractNotFoundException.cs" />
+    <Compile Include="ThingiProvider\Events\ProviderUpdatedEvent.cs" />
     <Compile Include="ThingiProvider\IProvider.cs" />
     <Compile Include="Qualities\QualityProfileInUseException.cs" />
     <Compile Include="Qualities\QualityDefinitionRepository.cs" />

src/NzbDrone.Core/ThingiProvider/Events/ProviderUpdatedEvent.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using NzbDrone.Common.Messaging;
+
+namespace NzbDrone.Core.ThingiProvider.Events
+{
+    public class ProviderUpdatedEvent<TProvider> : IEvent
+    {
+    }
+}

src/NzbDrone.Core/ThingiProvider/ProviderFactory.cs

@@ -5,6 +5,7 @@ using NLog;
 using NzbDrone.Common.Composition;
 using NzbDrone.Core.Lifecycle;
 using NzbDrone.Core.Messaging.Events;
+using NzbDrone.Core.ThingiProvider.Events;
 
 namespace NzbDrone.Core.ThingiProvider
 {
@@ -14,6 +15,7 @@ namespace NzbDrone.Core.ThingiProvider
     {
         private readonly IProviderRepository<TProviderDefinition> _providerRepository;
         private readonly IContainer _container;
+        private readonly IEventAggregator _eventAggregator;
         private readonly Logger _logger;
 
         protected readonly List<TProvider> _providers;
@@ -21,10 +23,12 @@ namespace NzbDrone.Core.ThingiProvider
         protected ProviderFactory(IProviderRepository<TProviderDefinition> providerRepository,
                                   IEnumerable<TProvider> providers,
                                   IContainer container,
+                                  IEventAggregator eventAggregator,
                                   Logger logger)
         {
             _providerRepository = providerRepository;
             _container = container;
+            _eventAggregator = eventAggregator;
             _providers = providers.ToList();
             _logger = logger;
         }
@@ -62,6 +66,7 @@ namespace NzbDrone.Core.ThingiProvider
         public virtual void Update(TProviderDefinition definition)
         {
             _providerRepository.Update(definition);
+            _eventAggregator.PublishEvent(new ProviderUpdatedEvent<TProvider>());
         }
 
         public void Delete(int id)

src/UI/Content/icons.less

@@ -48,7 +48,7 @@
 
 .icon-nd-warning:before {
   .icon(@warning-sign);
-  color : #f89406;
+  color : @orange;
 }
 
 .icon-nd-edit:before {
@@ -79,7 +79,7 @@
 
 .icon-nd-form-warning:before {
   .icon(@warning-sign);
-  color: #f89406;
+  color: @orange;
 }
 
 .icon-nd-form-danger:before {
@@ -176,3 +176,13 @@
 .icon-nd-restart:before {
   .icon(@repeat);
 }
+
+.icon-nd-health-warning:before {
+  .icon(@exclamation-sign);
+  color : @orange
+}
+
+.icon-nd-health-error:before {
+  .icon(@exclamation-sign);
+  color : @errorText
+}

src/UI/Content/menu.less

@@ -22,6 +22,8 @@
   li {
     list-style-type : none;
     display         : inline-block;
+    position        : relative;
+
     a {
 
       &:focus {
@@ -38,21 +40,20 @@
       font-weight   : 100;
     }
     span.label.pull-right {
-      position : relative;
-      top      : 24px;
-      right    : 14px;
+      position : absolute;
+      top      : 28px;
+      right    : 18px;
     }
   }
 }
 
-.backdrop #nav-region {
+.backdrop  {
+  #nav-region {
     background-color : #000000;
     .opacity(0.85);
-}
+  }
+
 
-#nav-region li a:hover, #in-sub-nav li a.active {
-  background-color : #555555;
-  text-decoration  : none;
 }
 
 #nav-region {
@@ -62,6 +63,19 @@
   .span12 {
     margin-left : 0px;
   }
+
+  li {
+    a {
+      &:hover {
+        background-color : #555555;
+        text-decoration  : none;
+      }
+
+      .label {
+        cursor: pointer;
+      }
+    }
+  }
 }
 
 .search {

src/UI/Health/HealthCollection.js

@@ -0,0 +1,16 @@
+'use strict';
+define(
+    [
+        'backbone',
+        'Health/HealthModel',
+        'Mixins/backbone.signalr.mixin'
+    ], function (Backbone, HealthModel) {
+        var Collection = Backbone.Collection.extend({
+            url  : window.NzbDrone.ApiRoot + '/health',
+            model: HealthModel
+        });
+
+        var collection = new Collection().bindSignalR();
+        collection.fetch();
+        return collection;
+    });

src/UI/Health/HealthModel.js

@@ -0,0 +1,9 @@
+'use strict';
+define(
+    [
+        'backbone'
+    ], function (Backbone) {
+        return Backbone.Model.extend({
+
+        });
+    });

src/UI/Health/HealthView.js

@@ -0,0 +1,39 @@
+'use strict';
+define(
+    [
+        'underscore',
+        'marionette',
+        'Health/HealthCollection'
+    ], function (_, Marionette, HealthCollection) {
+        return Marionette.ItemView.extend({
+            initialize: function () {
+                this.listenTo(HealthCollection, 'sync', this._healthSync);
+                HealthCollection.fetch();
+            },
+
+            render: function () {
+                this.$el.empty();
+
+                if (HealthCollection.length === 0) {
+                    return this;
+                }
+
+                var count = HealthCollection.length;
+                var label = 'label-warning';
+                var errors = HealthCollection.some(function (model) {
+                    return model.get('type') === 'error';
+                });
+
+                if (errors) {
+                    label = 'label-important';
+                }
+
+                this.$el.html('<span class="label pull-right {0}">{1}</span>'.format(label, count));
+                return this;
+            },
+
+            _healthSync: function () {
+                this.render();
+            }
+        });
+    });

src/UI/Navbar/NavbarLayoutTemplate.html

@@ -47,6 +47,7 @@
                         <i class="icon-laptop"></i>
                         <br>
                         System
+                        <span id="x-health"></span>
                     </a>
                 </li>
                 <li>

src/UI/Navbar/NavbarView.js

@@ -3,10 +3,15 @@ define(
     [
         'marionette',
         'jquery',
+        'Health/HealthView',
         'Navbar/Search'
-    ], function (Marionette, $) {
-        return Marionette.ItemView.extend({
-            template: 'Navbar/NavbarTemplate',
+    ], function (Marionette, $, HealthView) {
+        return Marionette.Layout.extend({
+            template: 'Navbar/NavbarLayoutTemplate',
+
+            regions: {
+                health: '#x-health'
+            },
 
             ui: {
                 search: '.x-series-search'
@@ -18,6 +23,7 @@ define(
 
             onRender: function () {
                 this.ui.search.bindSearch();
+                this.health.show(new HealthView());
             },
 
             onClick: function (event) {
@@ -30,9 +36,9 @@ define(
                 var href = event.target.getAttribute('href');
 
                 //if couldn't find it look up'
-                if (!href && target.parent('a') && target.parent('a')[0]) {
+                if (!href && target.closest('a') && target.closest('a')[0]) {
 
-                    var linkElement = target.parent('a')[0];
+                    var linkElement = target.closest('a')[0];
 
                     href = linkElement.getAttribute('href');
                     this.setActive(linkElement);

src/UI/System/Info/DiskSpace/DiskSpaceLayout.js

@@ -14,6 +14,7 @@ define([
         regions: {
             grid: '#x-grid'
         },
+
         columns:
             [
                 {
@@ -37,6 +38,7 @@ define([
             this.collection = new DiskSpaceCollection();
             this.listenTo(this.collection, 'sync', this._showTable);
         },
+
         onRender : function() {
             this.grid.show(new LoadingView());
         },
@@ -44,6 +46,7 @@ define([
         onShow: function() {
             this.collection.fetch();
         },
+
         _showTable: function() {
             this.grid.show(new Backgrid.Grid({
                 row: Backgrid.Row,

src/UI/System/Info/Health/HealthCell.js

@@ -0,0 +1,18 @@
+'use strict';
+define(
+    [
+        'Cells/NzbDroneCell'
+    ], function (NzbDroneCell) {
+        return NzbDroneCell.extend({
+
+            className: 'log-level-cell',
+
+            render: function () {
+
+                var level = this._getValue();
+                this.$el.html('<i class="icon-nd-health-{0}" title="{1}"/>'.format(this._getValue().toLowerCase(), level));
+
+                return this;
+            }
+        });
+    });

src/UI/System/Info/Health/HealthLayout.js

@@ -0,0 +1,55 @@
+'use strict';
+define(
+    [
+        'marionette',
+        'backgrid',
+        'Health/HealthCollection',
+        'System/Info/Health/HealthCell',
+        'System/Info/Health/HealthOkView'
+    ], function (Marionette, Backgrid, HealthCollection, HealthCell, HealthOkView) {
+        return Marionette.Layout.extend({
+            template: 'System/Info/Health/HealthLayoutTemplate',
+
+            regions: {
+                grid: '#x-health-grid'
+            },
+
+            columns:
+                [
+                    {
+                        name: 'type',
+                        label: '',
+                        cell: HealthCell
+                    },
+                    {
+                        name: 'message',
+                        label: 'Message',
+                        cell: 'string'
+                    }
+                ],
+
+            initialize: function () {
+                this.listenTo(HealthCollection, 'sync', this.render);
+                HealthCollection.fetch();
+            },
+
+            onRender : function() {
+                if (HealthCollection.length === 0) {
+                    this.grid.show(new HealthOkView());
+                }
+
+                else {
+                    this._showTable();
+                }
+            },
+
+            _showTable: function() {
+                this.grid.show(new Backgrid.Grid({
+                    row: Backgrid.Row,
+                    columns: this.columns,
+                    collection: HealthCollection,
+                    className:'table table-hover'
+                }));
+            }
+        });
+    });

src/UI/System/Info/Health/HealthLayoutTemplate.html

@@ -0,0 +1,6 @@
+<fieldset class="x-health">
+    <legend>Health</legend>
+
+    <div id="x-health-grid"/>
+</fieldset>
+

src/UI/System/Info/Health/HealthOkView.js

@@ -0,0 +1,9 @@
+'use strict';
+define(
+    [
+        'marionette'
+    ], function (Marionette) {
+        return Marionette.ItemView.extend({
+            template: 'System/Info/Health/HealthOkViewTemplate'
+        });
+    });

src/UI/System/Info/Health/HealthOkViewTemplate.html

@@ -0,0 +1,2 @@
+No issues with your configuration
+

src/UI/System/Info/SystemInfoLayout.js

@@ -4,22 +4,26 @@ define(
         'backbone',
         'marionette',
         'System/Info/About/AboutView',
-        'System/Info/DiskSpace/DiskSpaceLayout'
+        'System/Info/DiskSpace/DiskSpaceLayout',
+        'System/Info/Health/HealthLayout'
     ], function (Backbone,
                  Marionette,
                  AboutView,
-                 DiskSpaceLayout) {
+                 DiskSpaceLayout,
+                 HealthLayout) {
         return Marionette.Layout.extend({
             template: 'System/Info/SystemInfoLayoutTemplate',
 
             regions: {
                 about    : '#about',
-                diskSpace: '#diskspace'
+                diskSpace: '#diskspace',
+                health   : '#health'
             },
 
             onRender: function () {
                 this.about.show(new AboutView());
                 this.diskSpace.show(new DiskSpaceLayout());
+                this.health.show(new HealthLayout());
             }
         });
     });

src/UI/System/Info/SystemInfoLayoutTemplate.html

@@ -1,4 +1,8 @@
 <div class="row">
+    <div class="span12" id="health"></div>
+</div>
+
+<div class="row">
     <div class="span12" id="about"></div>
 </div>
 

src/UI/jQuery/RouteBinder.js

@@ -33,9 +33,9 @@ define(
 
                 var href = event.target.getAttribute('href');
 
-                if (!href && $target.parent('a') && $target.parent('a')[0]) {
+                if (!href && $target.closest('a') && $target.closest('a')[0]) {
 
-                    var linkElement = $target.parent('a')[0];
+                    var linkElement = $target.closest('a')[0];
 
                     href = linkElement.getAttribute('href');
                 }