New: Option to send notification when a Health Check warning occurs

src/NzbDrone.Core/Notifications/Boxcar/Boxcar.cs

@@ -26,6 +26,11 @@ namespace NzbDrone.Core.Notifications.Boxcar
             _proxy.SendNotification(MOVIE_DOWNLOADED_TITLE , message.Message, Settings);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck message)
+        {
+            _proxy.SendNotification(HEALTH_ISSUE_TITLE, message.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();

src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs

@@ -8,6 +8,7 @@ using NLog;
 using NzbDrone.Common.Disk;
 using NzbDrone.Common.Extensions;
 using NzbDrone.Common.Processes;
+using NzbDrone.Core.HealthCheck;
 using NzbDrone.Core.ThingiProvider;
 using NzbDrone.Core.Movies;
 using NzbDrone.Core.Validation;
@@ -112,6 +113,18 @@ namespace NzbDrone.Core.Notifications.CustomScript
             ExecuteScript(environmentVariables);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
+        {
+            var environmentVariables = new StringDictionary();
+
+            environmentVariables.Add("Radarr_EventType", "HealthIssue");
+            environmentVariables.Add("Radarr_Health_Issue_Level", nameof(healthCheck.Type));
+            environmentVariables.Add("Radarr_Health_Issue_Message", healthCheck.Message);
+            environmentVariables.Add("Radarr_Health_Issue_Type", healthCheck.Source.Name);
+            environmentVariables.Add("Radarr_Health_Issue_Wiki", healthCheck.WikiUrl.ToString() ?? string.Empty);
+
+            ExecuteScript(environmentVariables);
+        }
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();

src/NzbDrone.Core/Notifications/Discord/Discord.cs

@@ -53,6 +53,23 @@ namespace NzbDrone.Core.Notifications.Discord
             _proxy.SendPayload(payload, Settings);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
+        {
+            var attachments = new List<Embed>
+                              {
+                                  new Embed
+                                  {
+                                      Title = healthCheck.Source.Name,
+                                      Text = healthCheck.Message,
+                                      Color = healthCheck.Type == HealthCheck.HealthCheckResult.Warning ? (int)DiscordColors.Warning : (int)DiscordColors.Success
+                                  }
+                              };
+
+            var payload = CreatePayload("Health Issue", attachments);
+
+            _proxy.SendPayload(payload, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();

src/NzbDrone.Core/Notifications/Email/Email.cs

@@ -32,6 +32,10 @@ namespace NzbDrone.Core.Notifications.Email
             _emailService.SendEmail(Settings, MOVIE_DOWNLOADED_TITLE_BRANDED, body);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck message)
+        {
+            _emailService.SendEmail(Settings, HEALTH_ISSUE_TITLE_BRANDED, message.Message);
+        }
 
         public override ValidationResult Test()
         {

src/NzbDrone.Core/Notifications/Gotify/Gotify.cs

@@ -29,6 +29,11 @@ namespace NzbDrone.Core.Notifications.Gotify
             _proxy.SendNotification(MOVIE_DOWNLOADED_TITLE, message.Message, Settings);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
+        {
+            _proxy.SendNotification(HEALTH_ISSUE_TITLE, healthCheck.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();

src/NzbDrone.Core/Notifications/INotification.cs

@@ -10,9 +10,11 @@ namespace NzbDrone.Core.Notifications
         void OnGrab(GrabMessage grabMessage);
         void OnDownload(DownloadMessage message);
         void OnMovieRename(Movie movie);
+        void OnHealthIssue(HealthCheck.HealthCheck healthCheck);
         bool SupportsOnGrab { get; }
         bool SupportsOnDownload { get; }
         bool SupportsOnUpgrade { get; }
         bool SupportsOnRename { get; }
+        bool SupportsOnHealthIssue { get; }
     }
 }

src/NzbDrone.Core/Notifications/Join/Join.cs

@@ -27,6 +27,11 @@ namespace NzbDrone.Core.Notifications.Join
             _proxy.SendNotification(MOVIE_DOWNLOADED_TITLE_BRANDED, message.Message, Settings);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck message)
+        {
+            _proxy.SendNotification(HEALTH_ISSUE_TITLE_BRANDED, message.Message, Settings);
+        }
+        
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();

src/NzbDrone.Core/Notifications/MediaBrowser/MediaBrowser.cs

@@ -47,6 +47,13 @@ namespace NzbDrone.Core.Notifications.Emby
             }
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck message)
+        {
+            if (Settings.Notify)
+            {
+                _mediaBrowserService.Notify(Settings, HEALTH_ISSUE_TITLE_BRANDED, message.Message);
+            }
+        }
 
         public override ValidationResult Test()
         {

src/NzbDrone.Core/Notifications/NotificationBase.cs

@@ -10,9 +10,11 @@ namespace NzbDrone.Core.Notifications
     {
         protected const string MOVIE_GRABBED_TITLE = "Movie Grabbed";
         protected const string MOVIE_DOWNLOADED_TITLE = "Movie Downloaded";
+        protected const string HEALTH_ISSUE_TITLE = "Health Check Failure";
 
         protected const string MOVIE_GRABBED_TITLE_BRANDED = "Radarr - " + MOVIE_GRABBED_TITLE;
         protected const string MOVIE_DOWNLOADED_TITLE_BRANDED = "Radarr - " + MOVIE_DOWNLOADED_TITLE;
+        protected const string HEALTH_ISSUE_TITLE_BRANDED = "Radarr - " + HEALTH_ISSUE_TITLE;
 
         public abstract string Name { get; }
 
@@ -42,10 +44,16 @@ namespace NzbDrone.Core.Notifications
 
         }
 
+        public virtual void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
+        {
+
+        }
+
         public bool SupportsOnGrab => HasConcreteImplementation("OnGrab");
         public bool SupportsOnRename => HasConcreteImplementation("OnMovieRename");
         public bool SupportsOnDownload => HasConcreteImplementation("OnDownload");
         public bool SupportsOnUpgrade => SupportsOnDownload;
+        public bool SupportsOnHealthIssue => HasConcreteImplementation("OnHealthIssue");
 
         protected TSettings Settings => (TSettings)Definition.Settings;
 

src/NzbDrone.Core/Notifications/NotificationDefinition.cs

@@ -8,11 +8,14 @@ namespace NzbDrone.Core.Notifications
         public bool OnDownload { get; set; }
         public bool OnUpgrade { get; set; }
         public bool OnRename { get; set; }
+        public bool OnHealthIssue { get; set; }
         public bool SupportsOnGrab { get; set; }
         public bool SupportsOnDownload { get; set; }
         public bool SupportsOnUpgrade { get; set; }
         public bool SupportsOnRename { get; set; }
+        public bool SupportsOnHealthIssue { get; set; }
+        public bool IncludeHealthWarnings { get; set; }
 
-        public override bool Enable => OnGrab || OnDownload || (OnDownload && OnUpgrade);
+        public override bool Enable => OnGrab || OnDownload || (OnDownload && OnUpgrade) || OnHealthIssue;
     }
 }

src/NzbDrone.Core/Notifications/NotificationFactory.cs

@@ -13,6 +13,7 @@ namespace NzbDrone.Core.Notifications
         List<INotification> OnDownloadEnabled();
         List<INotification> OnUpgradeEnabled();
         List<INotification> OnRenameEnabled();
+        List<INotification> OnHealthIssueEnabled();
     }
 
     public class NotificationFactory : ProviderFactory<INotification, NotificationDefinition>, INotificationFactory
@@ -42,6 +43,11 @@ namespace NzbDrone.Core.Notifications
             return GetAvailableProviders().Where(n => ((NotificationDefinition)n.Definition).OnRename).ToList();
         }
 
+        public List<INotification> OnHealthIssueEnabled()
+        {
+            return GetAvailableProviders().Where(n => ((NotificationDefinition)n.Definition).OnHealthIssue).ToList();
+        }
+
         public override void SetProviderCharacteristics(INotification provider, NotificationDefinition definition)
         {
             base.SetProviderCharacteristics(provider, definition);
@@ -50,6 +56,7 @@ namespace NzbDrone.Core.Notifications
             definition.SupportsOnDownload = provider.SupportsOnDownload;
             definition.SupportsOnUpgrade = provider.SupportsOnUpgrade;
             definition.SupportsOnRename = provider.SupportsOnRename;
+            definition.SupportsOnHealthIssue = provider.SupportsOnHealthIssue;
         }
     }
 }

src/NzbDrone.Core/Notifications/NotificationService.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using NLog;
 using NzbDrone.Common.Extensions;
 using NzbDrone.Core.Download;
+using NzbDrone.Core.HealthCheck;
 using NzbDrone.Core.MediaFiles.Events;
 using NzbDrone.Core.Messaging.Events;
 using NzbDrone.Core.Qualities;
@@ -15,7 +16,8 @@ namespace NzbDrone.Core.Notifications
     public class NotificationService
         : IHandle<MovieRenamedEvent>, 
           IHandle<MovieGrabbedEvent>,
-          IHandle<MovieDownloadedEvent>
+          IHandle<MovieDownloadedEvent>,
+          IHandle<HealthCheckFailedEvent>
 
     {
         private readonly INotificationFactory _notificationFactory;
@@ -63,6 +65,21 @@ namespace NzbDrone.Core.Notifications
             return false;
         }
 
+        private bool ShouldHandleHealthFailure(HealthCheck.HealthCheck healthCheck, bool includeWarnings)
+        {
+            if (healthCheck.Type == HealthCheckResult.Error)
+            {
+                return true;
+            }
+
+            if (healthCheck.Type == HealthCheckResult.Warning && includeWarnings)
+            {
+                return true;
+            }
+
+            return false;
+        }
+
         public void Handle(MovieGrabbedEvent message)
         {
             var grabMessage = new GrabMessage
@@ -138,5 +155,24 @@ namespace NzbDrone.Core.Notifications
                 }
             }
         }
+
+        public void Handle(HealthCheckFailedEvent message)
+        {
+            foreach (var notification in _notificationFactory.OnHealthIssueEnabled())
+            {
+                try
+                {
+                    if (ShouldHandleHealthFailure(message.HealthCheck, ((NotificationDefinition)notification.Definition).IncludeHealthWarnings))
+                    {
+                        notification.OnHealthIssue(message.HealthCheck);
+                    }
+                }
+
+                catch (Exception ex)
+                {
+                    _logger.Warn(ex, "Unable to send OnHealthIssue notification to: " + notification.Definition.Name);
+                }
+            }
+        }
     }
 }

src/NzbDrone.Core/Notifications/PushBullet/PushBullet.cs

@@ -29,6 +29,11 @@ namespace NzbDrone.Core.Notifications.PushBullet
             _proxy.SendNotification(MOVIE_DOWNLOADED_TITLE_BRANDED, message.Message, Settings);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
+        {
+            _proxy.SendNotification(HEALTH_ISSUE_TITLE_BRANDED, healthCheck.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();

src/NzbDrone.Core/Notifications/Pushover/Pushover.cs

@@ -26,6 +26,11 @@ namespace NzbDrone.Core.Notifications.Pushover
             _proxy.SendNotification(MOVIE_DOWNLOADED_TITLE, message.Message, Settings);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
+        {
+            _proxy.SendNotification(HEALTH_ISSUE_TITLE, healthCheck.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();

src/NzbDrone.Core/Notifications/Slack/Slack.cs

@@ -70,6 +70,23 @@ namespace NzbDrone.Core.Notifications.Slack
             _proxy.SendPayload(payload, Settings);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
+        {
+            var attachments = new List<Attachment>
+                              {
+                                  new Attachment
+                                  {
+                                      Title = healthCheck.Source.Name,
+                                      Text = healthCheck.Message,
+                                      Color = healthCheck.Type == HealthCheck.HealthCheckResult.Warning ? "warning" : "danger"
+                                  }
+                              };
+
+            var payload = CreatePayload("Health Issue", attachments);
+
+            _proxy.SendPayload(payload, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();

src/NzbDrone.Core/Notifications/Telegram/Telegram.cs

@@ -26,6 +26,11 @@ namespace NzbDrone.Core.Notifications.Telegram
             _proxy.SendNotification(MOVIE_DOWNLOADED_TITLE, message.Message, Settings);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
+        {
+            _proxy.SendNotification(HEALTH_ISSUE_TITLE, healthCheck.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();

src/NzbDrone.Core/Notifications/Twitter/Twitter.cs

@@ -29,6 +29,11 @@ namespace NzbDrone.Core.Notifications.Twitter
             _twitterService.SendNotification($"[Radarr] Imported: {message.Message}", Settings);
         }
 
+        public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
+        {
+            _twitterService.SendNotification($"Health Issue: {healthCheck.Message}", Settings);
+        }
+
         public override object RequestAction(string action, IDictionary<string, string> query)
         {
             if (action == "startOAuth")

src/NzbDrone.Core/Notifications/Xbmc/Xbmc.cs

@@ -41,7 +41,12 @@ namespace NzbDrone.Core.Notifications.Xbmc
             UpdateAndCleanMovie(movie);
         }
 
-        public override string Name => "Kodi (XBMC)";
+        public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
+        {
+            Notify(Settings, HEALTH_ISSUE_TITLE_BRANDED, healthCheck.Message);
+        }
+
+        public override string Name => "Kodi";
 
         public override ValidationResult Test()
         {