New: Health check for Discord notifications setup as Slack

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

@@ -0,0 +1,39 @@
+using System.Linq;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Core.Localization;
+using NzbDrone.Core.Notifications;
+using NzbDrone.Core.Notifications.Slack;
+using NzbDrone.Core.ThingiProvider.Events;
+
+namespace NzbDrone.Core.HealthCheck.Checks
+{
+    [CheckOn(typeof(ProviderUpdatedEvent<INotificationFactory>))]
+    [CheckOn(typeof(ProviderDeletedEvent<INotificationFactory>))]
+    [CheckOn(typeof(ProviderStatusChangedEvent<INotificationFactory>))]
+    public class SlackUrlCheck : HealthCheckBase
+    {
+        private readonly INotificationFactory _notificationFactory;
+
+        public SlackUrlCheck(INotificationFactory notificationFactory, ILocalizationService localizationService)
+            : base(localizationService)
+        {
+            _notificationFactory = notificationFactory;
+        }
+
+        public override HealthCheck Check()
+        {
+            var discordSlackNotifications = _notificationFactory.GetAvailableProviders().Where(n => n.ConfigContract.Equals("SlackSettings") && (n.Definition.Settings as SlackSettings).WebHookUrl.Contains("discord"));
+
+            if (discordSlackNotifications.Empty())
+            {
+                return new HealthCheck(GetType());
+            }
+
+            return new HealthCheck(GetType(),
+                HealthCheckResult.Warning,
+                string.Format(_localizationService.GetLocalizedString("DiscordUrlInSlackNotification"),
+                    string.Join(", ", discordSlackNotifications.Select(n => n.Name))),
+                "#discord-as-slack-notification");
+        }
+    }
+}

src/NzbDrone.Core/Localization/Core/en.json

@@ -230,6 +230,7 @@
   "DigitalRelease": "Digital Release",
   "Disabled": "Disabled",
   "Discord": "Discord",
+  "DiscordUrlInSlackNotification": "You have a Discord notification setup as a Slack notification. Set this up as a Discord notification for better functionality. The effected notifications are: {0}",
   "Discover": "Discover",
   "DiskSpace": "Disk Space",
   "Docker": "Docker",