From fbdc9f3a131953d2c95e0924058df82986cb198c Mon Sep 17 00:00:00 2001
From: Qstick <qstick@gmail.com>
Date: Mon, 20 Dec 2021 23:12:12 -0600
Subject: [PATCH] New: OnApplicationUpdate Notifications

Fixes #1422

(cherry picked from commit 9e175e28efcfc6ac3e414649b955a10fb0e951e7)
---
 .../Notifications/Notification.js             | 14 +++++++-
 .../Notifications/NotificationEventItems.js   | 16 ++++++++-
 .../Store/Actions/Settings/notifications.js   |  1 +
 .../NotificationBaseFixture.cs                |  7 ++++
 .../025_add_on_update_to_notifications.cs     | 14 ++++++++
 src/NzbDrone.Core/Datastore/TableMapping.cs   |  3 +-
 src/NzbDrone.Core/Localization/Core/en.json   |  2 ++
 .../Notifications/ApplicationUpdateMessage.cs | 16 +++++++++
 .../Notifications/Boxcar/Boxcar.cs            |  5 +++
 .../CustomScript/CustomScript.cs              | 12 +++++++
 .../Notifications/Discord/Discord.cs          | 35 +++++++++++++++++++
 .../Notifications/Discord/DiscordSettings.cs  |  2 ++
 .../Discord/Payloads/DiscordAuthor.cs         | 12 +++++++
 .../Discord/Payloads/DiscordField.cs          |  9 +++++
 .../Discord/Payloads/DiscordImage.cs          |  7 ++++
 .../Notifications/Discord/Payloads/Embed.cs   |  8 +++++
 .../Notifications/Email/Email.cs              |  7 ++++
 .../Notifications/Gotify/Gotify.cs            |  5 +++
 .../Notifications/INotification.cs            |  2 ++
 src/NzbDrone.Core/Notifications/Join/Join.cs  |  5 +++
 .../Notifications/Mailgun/Mailgun.cs          |  5 +++
 .../Notifications/Notifiarr/Notifiarr.cs      | 12 +++++++
 .../Notifications/NotificationBase.cs         |  7 ++++
 .../Notifications/NotificationDefinition.cs   |  4 ++-
 .../Notifications/NotificationFactory.cs      |  7 ++++
 .../Notifications/NotificationService.cs      | 24 ++++++++++++-
 src/NzbDrone.Core/Notifications/Ntfy/Ntfy.cs  |  5 +++
 .../Notifications/Prowl/Prowl.cs              |  5 +++
 .../Notifications/PushBullet/PushBullet.cs    |  5 +++
 .../Notifications/Pushover/Pushover.cs        |  5 +++
 .../Notifications/SendGrid/SendGrid.cs        |  5 +++
 .../Notifications/Slack/Slack.cs              | 17 +++++++++
 .../Notifications/Telegram/Telegram.cs        |  5 +++
 .../Notifications/Twitter/Twitter.cs          |  5 +++
 .../Notifications/Webhook/Webhook.cs          | 13 +++++++
 .../WebhookApplicationUpdatePayload.cs        | 11 ++++++
 .../Notifications/Webhook/WebhookEventType.cs |  3 +-
 .../Notifications/NotificationResource.cs     |  6 ++++
 38 files changed, 320 insertions(+), 6 deletions(-)
 create mode 100644 src/NzbDrone.Core/Datastore/Migration/025_add_on_update_to_notifications.cs
 create mode 100644 src/NzbDrone.Core/Notifications/ApplicationUpdateMessage.cs
 create mode 100644 src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordAuthor.cs
 create mode 100644 src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordField.cs
 create mode 100644 src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordImage.cs
 create mode 100644 src/NzbDrone.Core/Notifications/Webhook/WebhookApplicationUpdatePayload.cs

diff --git a/frontend/src/Settings/Notifications/Notifications/Notification.js b/frontend/src/Settings/Notifications/Notifications/Notification.js
index 63df259eb..dc0b428c7 100644
--- a/frontend/src/Settings/Notifications/Notifications/Notification.js
+++ b/frontend/src/Settings/Notifications/Notifications/Notification.js
@@ -67,6 +67,7 @@ class Notification extends Component {
       onDownloadFailure,
       onImportFailure,
       onBookRetag,
+      onApplicationUpdate,
       supportsOnGrab,
       supportsOnReleaseImport,
       supportsOnUpgrade,
@@ -78,7 +79,8 @@ class Notification extends Component {
       supportsOnHealthIssue,
       supportsOnDownloadFailure,
       supportsOnImportFailure,
-      supportsOnBookRetag
+      supportsOnBookRetag,
+      supportsOnApplicationUpdate
     } = this.props;
 
     return (
@@ -187,6 +189,14 @@ class Notification extends Component {
             null
         }
 
+        {
+          supportsOnApplicationUpdate && onApplicationUpdate ?
+            <Label kind={kinds.SUCCESS} >
+              {translate('OnApplicationUpdate')}
+            </Label> :
+            null
+        }
+
         {
           !onGrab && !onReleaseImport && !onRename && !onBookRetag && !onHealthIssue && !onDownloadFailure && !onImportFailure ?
             <Label
@@ -234,6 +244,7 @@ Notification.propTypes = {
   onDownloadFailure: PropTypes.bool.isRequired,
   onImportFailure: PropTypes.bool.isRequired,
   onBookRetag: PropTypes.bool.isRequired,
+  onApplicationUpdate: PropTypes.bool.isRequired,
   supportsOnGrab: PropTypes.bool.isRequired,
   supportsOnReleaseImport: PropTypes.bool.isRequired,
   supportsOnUpgrade: PropTypes.bool.isRequired,
@@ -246,6 +257,7 @@ Notification.propTypes = {
   supportsOnDownloadFailure: PropTypes.bool.isRequired,
   supportsOnImportFailure: PropTypes.bool.isRequired,
   supportsOnBookRetag: PropTypes.bool.isRequired,
+  supportsOnApplicationUpdate: PropTypes.bool.isRequired,
   onConfirmDeleteNotification: PropTypes.func.isRequired
 };
 
diff --git a/frontend/src/Settings/Notifications/Notifications/NotificationEventItems.js b/frontend/src/Settings/Notifications/Notifications/NotificationEventItems.js
index a905dfb07..5bc396a73 100644
--- a/frontend/src/Settings/Notifications/Notifications/NotificationEventItems.js
+++ b/frontend/src/Settings/Notifications/Notifications/NotificationEventItems.js
@@ -27,6 +27,7 @@ function NotificationEventItems(props) {
     onDownloadFailure,
     onImportFailure,
     onBookRetag,
+    onApplicationUpdate,
     supportsOnGrab,
     supportsOnReleaseImport,
     supportsOnUpgrade,
@@ -38,7 +39,8 @@ function NotificationEventItems(props) {
     includeHealthWarnings,
     supportsOnDownloadFailure,
     supportsOnImportFailure,
-    supportsOnBookRetag
+    supportsOnBookRetag,
+    supportsOnApplicationUpdate
   } = item;
 
   return (
@@ -176,6 +178,17 @@ function NotificationEventItems(props) {
             />
           </div>
 
+          <div>
+            <FormInputGroup
+              type={inputTypes.CHECK}
+              name="onApplicationUpdate"
+              helpText={translate('OnApplicationUpdateHelpText')}
+              isDisabled={!supportsOnApplicationUpdate.value}
+              {...onApplicationUpdate}
+              onChange={onInputChange}
+            />
+          </div>
+
           <div>
             <FormInputGroup
               type={inputTypes.CHECK}
@@ -200,6 +213,7 @@ function NotificationEventItems(props) {
                 />
               </div>
           }
+
         </div>
       </div>
     </FormGroup>
diff --git a/frontend/src/Store/Actions/Settings/notifications.js b/frontend/src/Store/Actions/Settings/notifications.js
index 41a155005..166e32a5a 100644
--- a/frontend/src/Store/Actions/Settings/notifications.js
+++ b/frontend/src/Store/Actions/Settings/notifications.js
@@ -114,6 +114,7 @@ export default {
         selectedSchema.onDownloadFailure = selectedSchema.supportsOnDownloadFailure;
         selectedSchema.onImportFailure = selectedSchema.supportsOnImportFailure;
         selectedSchema.onBookRetag = selectedSchema.supportsOnBookRetag;
+        selectedSchema.onApplicationUpdate = selectedSchema.supportsOnApplicationUpdate;
 
         return selectedSchema;
       });
diff --git a/src/NzbDrone.Core.Test/NotificationTests/NotificationBaseFixture.cs b/src/NzbDrone.Core.Test/NotificationTests/NotificationBaseFixture.cs
index d3100d5df..5dc996c2e 100644
--- a/src/NzbDrone.Core.Test/NotificationTests/NotificationBaseFixture.cs
+++ b/src/NzbDrone.Core.Test/NotificationTests/NotificationBaseFixture.cs
@@ -96,6 +96,11 @@ public override void OnBookRetag(BookRetagMessage message)
             {
                 TestLogger.Info("OnBookRetag was called");
             }
+
+            public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+            {
+                TestLogger.Info("OnApplicationUpdate was called");
+            }
         }
 
         private class TestNotificationWithNoEvents : NotificationBase<TestSetting>
@@ -138,6 +143,7 @@ public void should_support_all_if_implemented()
             notification.SupportsOnDownloadFailure.Should().BeTrue();
             notification.SupportsOnImportFailure.Should().BeTrue();
             notification.SupportsOnBookRetag.Should().BeTrue();
+            notification.SupportsOnApplicationUpdate.Should().BeTrue();
         }
 
         [Test]
@@ -157,6 +163,7 @@ public void should_support_none_if_none_are_implemented()
             notification.SupportsOnDownloadFailure.Should().BeFalse();
             notification.SupportsOnImportFailure.Should().BeFalse();
             notification.SupportsOnBookRetag.Should().BeFalse();
+            notification.SupportsOnApplicationUpdate.Should().BeFalse();
         }
     }
 }
diff --git a/src/NzbDrone.Core/Datastore/Migration/025_add_on_update_to_notifications.cs b/src/NzbDrone.Core/Datastore/Migration/025_add_on_update_to_notifications.cs
new file mode 100644
index 000000000..85e48bcba
--- /dev/null
+++ b/src/NzbDrone.Core/Datastore/Migration/025_add_on_update_to_notifications.cs
@@ -0,0 +1,14 @@
+using FluentMigrator;
+using NzbDrone.Core.Datastore.Migration.Framework;
+
+namespace NzbDrone.Core.Datastore.Migration
+{
+    [Migration(025)]
+    public class add_on_update_to_notifications : NzbDroneMigrationBase
+    {
+        protected override void MainDbUpgrade()
+        {
+            Alter.Table("Notifications").AddColumn("OnApplicationUpdate").AsBoolean().WithDefaultValue(true);
+        }
+    }
+}
diff --git a/src/NzbDrone.Core/Datastore/TableMapping.cs b/src/NzbDrone.Core/Datastore/TableMapping.cs
index 2012f04d6..1e8d24d45 100644
--- a/src/NzbDrone.Core/Datastore/TableMapping.cs
+++ b/src/NzbDrone.Core/Datastore/TableMapping.cs
@@ -90,7 +90,8 @@ public static void Map()
                   .Ignore(i => i.SupportsOnHealthIssue)
                   .Ignore(i => i.SupportsOnDownloadFailure)
                   .Ignore(i => i.SupportsOnImportFailure)
-                  .Ignore(i => i.SupportsOnBookRetag);
+                  .Ignore(i => i.SupportsOnBookRetag)
+                  .Ignore(i => i.SupportsOnApplicationUpdate);
 
             Mapper.Entity<MetadataDefinition>("Metadata").RegisterModel()
                   .Ignore(x => x.ImplementationName)
diff --git a/src/NzbDrone.Core/Localization/Core/en.json b/src/NzbDrone.Core/Localization/Core/en.json
index aac37b652..bd2e82d9e 100644
--- a/src/NzbDrone.Core/Localization/Core/en.json
+++ b/src/NzbDrone.Core/Localization/Core/en.json
@@ -497,6 +497,8 @@
   "OnBookFileDeleteHelpText": "On Book File Delete",
   "OnBookRetagHelpText": "On Book Retag",
   "OnBookTagUpdate": "On Book Tag Update",
+  "OnApplicationUpdate": "On Application Update",
+  "OnApplicationUpdateHelpText": "On Application Update",
   "OnDownloadFailure": "On Download Failure",
   "OnDownloadFailureHelpText": "On Download Failure",
   "OnGrab": "On Grab",
diff --git a/src/NzbDrone.Core/Notifications/ApplicationUpdateMessage.cs b/src/NzbDrone.Core/Notifications/ApplicationUpdateMessage.cs
new file mode 100644
index 000000000..1819ad423
--- /dev/null
+++ b/src/NzbDrone.Core/Notifications/ApplicationUpdateMessage.cs
@@ -0,0 +1,16 @@
+using System;
+
+namespace NzbDrone.Core.Notifications
+{
+    public class ApplicationUpdateMessage
+    {
+        public string Message { get; set; }
+        public Version PreviousVersion { get; set; }
+        public Version NewVersion { get; set; }
+
+        public override string ToString()
+        {
+            return NewVersion.ToString();
+        }
+    }
+}
diff --git a/src/NzbDrone.Core/Notifications/Boxcar/Boxcar.cs b/src/NzbDrone.Core/Notifications/Boxcar/Boxcar.cs
index 033c24c71..2fb698ab7 100644
--- a/src/NzbDrone.Core/Notifications/Boxcar/Boxcar.cs
+++ b/src/NzbDrone.Core/Notifications/Boxcar/Boxcar.cs
@@ -56,6 +56,11 @@ public override void OnImportFailure(BookDownloadMessage message)
             _proxy.SendNotification(IMPORT_FAILURE_TITLE, message.Message, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage message)
+        {
+            _proxy.SendNotification(APPLICATION_UPDATE_TITLE, message.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs b/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs
index ce6bab057..d3f3aae47 100644
--- a/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs
+++ b/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs
@@ -214,6 +214,18 @@ public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
             ExecuteScript(environmentVariables);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            var environmentVariables = new StringDictionary();
+
+            environmentVariables.Add("Readarr_EventType", "ApplicationUpdate");
+            environmentVariables.Add("Readarr_Update_Message", updateMessage.Message);
+            environmentVariables.Add("Readarr_Update_NewVersion", updateMessage.NewVersion.ToString());
+            environmentVariables.Add("Readarr_Update_PreviousVersion", updateMessage.PreviousVersion.ToString());
+
+            ExecuteScript(environmentVariables);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/Discord/Discord.cs b/src/NzbDrone.Core/Notifications/Discord/Discord.cs
index 89429f7c7..31cbd69a6 100644
--- a/src/NzbDrone.Core/Notifications/Discord/Discord.cs
+++ b/src/NzbDrone.Core/Notifications/Discord/Discord.cs
@@ -184,6 +184,41 @@ public override void OnImportFailure(BookDownloadMessage message)
             _proxy.SendPayload(payload, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            var attachments = new List<Embed>
+                              {
+                                  new Embed
+                                  {
+                                      Author = new DiscordAuthor
+                                      {
+                                          Name = Settings.Author.IsNullOrWhiteSpace() ? Environment.MachineName : Settings.Author,
+                                          IconUrl = "https://raw.githubusercontent.com/Readarr/Readarr/develop/Logo/256.png"
+                                      },
+                                      Title = APPLICATION_UPDATE_TITLE,
+                                      Timestamp = DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:ss.fffZ"),
+                                      Color = (int)DiscordColors.Standard,
+                                      Fields = new List<DiscordField>()
+                                      {
+                                          new DiscordField()
+                                          {
+                                              Name = "Previous Version",
+                                              Value = updateMessage.PreviousVersion.ToString()
+                                          },
+                                          new DiscordField()
+                                          {
+                                              Name = "New Version",
+                                              Value = updateMessage.NewVersion.ToString()
+                                          }
+                                      },
+                                  }
+                              };
+
+            var payload = CreatePayload(null, attachments);
+
+            _proxy.SendPayload(payload, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/Discord/DiscordSettings.cs b/src/NzbDrone.Core/Notifications/Discord/DiscordSettings.cs
index 7788875e0..d5e32294b 100644
--- a/src/NzbDrone.Core/Notifications/Discord/DiscordSettings.cs
+++ b/src/NzbDrone.Core/Notifications/Discord/DiscordSettings.cs
@@ -25,6 +25,8 @@ public class DiscordSettings : IProviderConfig
 
         [FieldDefinition(2, Label = "Avatar", HelpText = "Change the avatar that is used for messages from this integration", Type = FieldType.Textbox)]
         public string Avatar { get; set; }
+        [FieldDefinition(3, Label = "Host", Advanced = true, HelpText = "Override the Host that shows for this notification, Blank is machine name", Type = FieldType.Textbox)]
+        public string Author { get; set; }
 
         public NzbDroneValidationResult Validate()
         {
diff --git a/src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordAuthor.cs b/src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordAuthor.cs
new file mode 100644
index 000000000..df0a68005
--- /dev/null
+++ b/src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordAuthor.cs
@@ -0,0 +1,12 @@
+using Newtonsoft.Json;
+
+namespace NzbDrone.Core.Notifications.Discord.Payloads
+{
+    public class DiscordAuthor
+    {
+        public string Name { get; set; }
+
+        [JsonProperty("icon_url")]
+        public string IconUrl { get; set; }
+    }
+}
diff --git a/src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordField.cs b/src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordField.cs
new file mode 100644
index 000000000..6e41ad422
--- /dev/null
+++ b/src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordField.cs
@@ -0,0 +1,9 @@
+namespace NzbDrone.Core.Notifications.Discord.Payloads
+{
+    public class DiscordField
+    {
+        public string Name { get; set; }
+        public string Value { get; set; }
+        public bool Inline { get; set; }
+    }
+}
diff --git a/src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordImage.cs b/src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordImage.cs
new file mode 100644
index 000000000..bd64dd6f6
--- /dev/null
+++ b/src/NzbDrone.Core/Notifications/Discord/Payloads/DiscordImage.cs
@@ -0,0 +1,7 @@
+namespace NzbDrone.Core.Notifications.Discord.Payloads
+{
+    public class DiscordImage
+    {
+        public string Url { get; set; }
+    }
+}
diff --git a/src/NzbDrone.Core/Notifications/Discord/Payloads/Embed.cs b/src/NzbDrone.Core/Notifications/Discord/Payloads/Embed.cs
index 50e27914b..1c1d1bdb4 100644
--- a/src/NzbDrone.Core/Notifications/Discord/Payloads/Embed.cs
+++ b/src/NzbDrone.Core/Notifications/Discord/Payloads/Embed.cs
@@ -1,3 +1,5 @@
+using System.Collections.Generic;
+
 namespace NzbDrone.Core.Notifications.Discord.Payloads
 {
     public class Embed
@@ -6,5 +8,11 @@ public class Embed
         public string Title { get; set; }
         public string Text { get; set; }
         public int Color { get; set; }
+        public string Url { get; set; }
+        public DiscordAuthor Author { get; set; }
+        public DiscordImage Thumbnail { get; set; }
+        public DiscordImage Image { get; set; }
+        public string Timestamp { get; set; }
+        public List<DiscordField> Fields { get; set; }
     }
 }
diff --git a/src/NzbDrone.Core/Notifications/Email/Email.cs b/src/NzbDrone.Core/Notifications/Email/Email.cs
index 14115198c..e3f7c7d9e 100644
--- a/src/NzbDrone.Core/Notifications/Email/Email.cs
+++ b/src/NzbDrone.Core/Notifications/Email/Email.cs
@@ -80,6 +80,13 @@ public override void OnImportFailure(BookDownloadMessage message)
             SendEmail(Settings, IMPORT_FAILURE_TITLE_BRANDED, message.Message);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            var body = $"{updateMessage.Message}";
+
+            SendEmail(Settings, APPLICATION_UPDATE_TITLE_BRANDED, body);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/Gotify/Gotify.cs b/src/NzbDrone.Core/Notifications/Gotify/Gotify.cs
index d4ab4a392..d27596138 100644
--- a/src/NzbDrone.Core/Notifications/Gotify/Gotify.cs
+++ b/src/NzbDrone.Core/Notifications/Gotify/Gotify.cs
@@ -59,6 +59,11 @@ public override void OnImportFailure(BookDownloadMessage message)
             _proxy.SendNotification(IMPORT_FAILURE_TITLE, message.Message, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            _proxy.SendNotification(APPLICATION_UPDATE_TITLE, updateMessage.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/INotification.cs b/src/NzbDrone.Core/Notifications/INotification.cs
index de9fe4804..6cef6ae02 100644
--- a/src/NzbDrone.Core/Notifications/INotification.cs
+++ b/src/NzbDrone.Core/Notifications/INotification.cs
@@ -14,6 +14,7 @@ public interface INotification : IProvider
         void OnBookDelete(BookDeleteMessage deleteMessage);
         void OnBookFileDelete(BookFileDeleteMessage deleteMessage);
         void OnHealthIssue(HealthCheck.HealthCheck healthCheck);
+        void OnApplicationUpdate(ApplicationUpdateMessage updateMessage);
         void OnDownloadFailure(DownloadFailedMessage message);
         void OnImportFailure(BookDownloadMessage message);
         void OnBookRetag(BookRetagMessage message);
@@ -27,6 +28,7 @@ public interface INotification : IProvider
         bool SupportsOnBookFileDelete { get; }
         bool SupportsOnBookFileDeleteForUpgrade { get; }
         bool SupportsOnHealthIssue { get; }
+        bool SupportsOnApplicationUpdate { get; }
         bool SupportsOnDownloadFailure { get; }
         bool SupportsOnImportFailure { get; }
         bool SupportsOnBookRetag { get; }
diff --git a/src/NzbDrone.Core/Notifications/Join/Join.cs b/src/NzbDrone.Core/Notifications/Join/Join.cs
index 9dcfd9d4e..ae225a817 100644
--- a/src/NzbDrone.Core/Notifications/Join/Join.cs
+++ b/src/NzbDrone.Core/Notifications/Join/Join.cs
@@ -47,6 +47,11 @@ public override void OnHealthIssue(HealthCheck.HealthCheck message)
             _proxy.SendNotification(HEALTH_ISSUE_TITLE_BRANDED, message.Message, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            _proxy.SendNotification(APPLICATION_UPDATE_TITLE_BRANDED, updateMessage.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/Mailgun/Mailgun.cs b/src/NzbDrone.Core/Notifications/Mailgun/Mailgun.cs
index c3a956cb2..d5e6ff095 100644
--- a/src/NzbDrone.Core/Notifications/Mailgun/Mailgun.cs
+++ b/src/NzbDrone.Core/Notifications/Mailgun/Mailgun.cs
@@ -49,6 +49,11 @@ public override void OnHealthIssue(HealthCheck.HealthCheck healthCheckMessage)
             _proxy.SendNotification(HEALTH_ISSUE_TITLE, healthCheckMessage.Message, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            _proxy.SendNotification(APPLICATION_UPDATE_TITLE, updateMessage.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/Notifiarr/Notifiarr.cs b/src/NzbDrone.Core/Notifications/Notifiarr/Notifiarr.cs
index 4d6afa118..9fefdc86b 100644
--- a/src/NzbDrone.Core/Notifications/Notifiarr/Notifiarr.cs
+++ b/src/NzbDrone.Core/Notifications/Notifiarr/Notifiarr.cs
@@ -159,6 +159,18 @@ public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
             _proxy.SendNotification(variables, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            var variables = new StringDictionary();
+
+            variables.Add("Readarr_EventType", "ApplicationUpdate");
+            variables.Add("Readarr_Update_Message", updateMessage.Message);
+            variables.Add("Readarr_Update_NewVersion", updateMessage.NewVersion.ToString());
+            variables.Add("Readarr_Update_PreviousVersion", updateMessage.PreviousVersion.ToString());
+
+            _proxy.SendNotification(variables, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/NotificationBase.cs b/src/NzbDrone.Core/Notifications/NotificationBase.cs
index 677751b17..cb733bdf2 100644
--- a/src/NzbDrone.Core/Notifications/NotificationBase.cs
+++ b/src/NzbDrone.Core/Notifications/NotificationBase.cs
@@ -18,6 +18,7 @@ public abstract class NotificationBase<TSettings> : INotification
         protected const string DOWNLOAD_FAILURE_TITLE = "Download Failed";
         protected const string IMPORT_FAILURE_TITLE = "Import Failed";
         protected const string BOOK_RETAGGED_TITLE = "Book File Tags Updated";
+        protected const string APPLICATION_UPDATE_TITLE = "Application Updated";
 
         protected const string BOOK_GRABBED_TITLE_BRANDED = "Readarr - " + BOOK_GRABBED_TITLE;
         protected const string BOOK_DOWNLOADED_TITLE_BRANDED = "Readarr - " + BOOK_DOWNLOADED_TITLE;
@@ -28,6 +29,7 @@ public abstract class NotificationBase<TSettings> : INotification
         protected const string DOWNLOAD_FAILURE_TITLE_BRANDED = "Readarr - " + DOWNLOAD_FAILURE_TITLE;
         protected const string IMPORT_FAILURE_TITLE_BRANDED = "Readarr - " + IMPORT_FAILURE_TITLE;
         protected const string BOOK_RETAGGED_TITLE_BRANDED = "Readarr - " + BOOK_RETAGGED_TITLE;
+        protected const string APPLICATION_UPDATE_TITLE_BRANDED = "Readarr - " + APPLICATION_UPDATE_TITLE;
 
         public abstract string Name { get; }
 
@@ -82,6 +84,10 @@ public virtual void OnBookRetag(BookRetagMessage message)
         {
         }
 
+        public virtual void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+        }
+
         public virtual void ProcessQueue()
         {
         }
@@ -98,6 +104,7 @@ public virtual void ProcessQueue()
         public bool SupportsOnDownloadFailure => HasConcreteImplementation("OnDownloadFailure");
         public bool SupportsOnImportFailure => HasConcreteImplementation("OnImportFailure");
         public bool SupportsOnBookRetag => HasConcreteImplementation("OnBookRetag");
+        public bool SupportsOnApplicationUpdate => HasConcreteImplementation("OnApplicationUpdate");
 
         protected TSettings Settings => (TSettings)Definition.Settings;
 
diff --git a/src/NzbDrone.Core/Notifications/NotificationDefinition.cs b/src/NzbDrone.Core/Notifications/NotificationDefinition.cs
index 0e494294f..c9b72baa2 100644
--- a/src/NzbDrone.Core/Notifications/NotificationDefinition.cs
+++ b/src/NzbDrone.Core/Notifications/NotificationDefinition.cs
@@ -16,6 +16,7 @@ public class NotificationDefinition : ProviderDefinition
         public bool OnDownloadFailure { get; set; }
         public bool OnImportFailure { get; set; }
         public bool OnBookRetag { get; set; }
+        public bool OnApplicationUpdate { get; set; }
         public bool SupportsOnGrab { get; set; }
         public bool SupportsOnReleaseImport { get; set; }
         public bool SupportsOnUpgrade { get; set; }
@@ -29,7 +30,8 @@ public class NotificationDefinition : ProviderDefinition
         public bool SupportsOnDownloadFailure { get; set; }
         public bool SupportsOnImportFailure { get; set; }
         public bool SupportsOnBookRetag { get; set; }
+        public bool SupportsOnApplicationUpdate { get; set; }
 
-        public override bool Enable => OnGrab || OnReleaseImport || (OnReleaseImport && OnUpgrade) || OnAuthorDelete || OnBookDelete || OnBookFileDelete || OnBookFileDeleteForUpgrade || OnHealthIssue || OnDownloadFailure || OnImportFailure || OnBookRetag;
+        public override bool Enable => OnGrab || OnReleaseImport || (OnReleaseImport && OnUpgrade) || OnAuthorDelete || OnBookDelete || OnBookFileDelete || OnBookFileDeleteForUpgrade || OnHealthIssue || OnDownloadFailure || OnImportFailure || OnBookRetag || OnApplicationUpdate;
     }
 }
diff --git a/src/NzbDrone.Core/Notifications/NotificationFactory.cs b/src/NzbDrone.Core/Notifications/NotificationFactory.cs
index 8c9f483b5..6fa6a600d 100644
--- a/src/NzbDrone.Core/Notifications/NotificationFactory.cs
+++ b/src/NzbDrone.Core/Notifications/NotificationFactory.cs
@@ -22,6 +22,7 @@ public interface INotificationFactory : IProviderFactory<INotification, Notifica
         List<INotification> OnDownloadFailureEnabled();
         List<INotification> OnImportFailureEnabled();
         List<INotification> OnBookRetagEnabled();
+        List<INotification> OnApplicationUpdateEnabled();
     }
 
     public class NotificationFactory : ProviderFactory<INotification, NotificationDefinition>, INotificationFactory
@@ -91,6 +92,11 @@ public List<INotification> OnBookRetagEnabled()
             return GetAvailableProviders().Where(n => ((NotificationDefinition)n.Definition).OnBookRetag).ToList();
         }
 
+        public List<INotification> OnApplicationUpdateEnabled()
+        {
+            return GetAvailableProviders().Where(n => ((NotificationDefinition)n.Definition).OnApplicationUpdate).ToList();
+        }
+
         public override void SetProviderCharacteristics(INotification provider, NotificationDefinition definition)
         {
             base.SetProviderCharacteristics(provider, definition);
@@ -107,6 +113,7 @@ public override void SetProviderCharacteristics(INotification provider, Notifica
             definition.SupportsOnDownloadFailure = provider.SupportsOnDownloadFailure;
             definition.SupportsOnImportFailure = provider.SupportsOnImportFailure;
             definition.SupportsOnBookRetag = provider.SupportsOnBookRetag;
+            definition.SupportsOnApplicationUpdate = provider.SupportsOnApplicationUpdate;
         }
     }
 }
diff --git a/src/NzbDrone.Core/Notifications/NotificationService.cs b/src/NzbDrone.Core/Notifications/NotificationService.cs
index ce98decbe..d4a1f6ceb 100644
--- a/src/NzbDrone.Core/Notifications/NotificationService.cs
+++ b/src/NzbDrone.Core/Notifications/NotificationService.cs
@@ -12,6 +12,7 @@
 using NzbDrone.Core.Messaging.Events;
 using NzbDrone.Core.Qualities;
 using NzbDrone.Core.ThingiProvider;
+using NzbDrone.Core.Update.History.Events;
 
 namespace NzbDrone.Core.Notifications
 {
@@ -26,7 +27,8 @@ public class NotificationService
           IHandle<DownloadFailedEvent>,
           IHandle<BookImportIncompleteEvent>,
           IHandle<BookFileRetaggedEvent>,
-          IHandleAsync<DeleteCompletedEvent>
+          IHandleAsync<DeleteCompletedEvent>,
+          IHandle<UpdateInstalledEvent>
     {
         private readonly INotificationFactory _notificationFactory;
         private readonly Logger _logger;
@@ -346,6 +348,26 @@ public void Handle(BookFileRetaggedEvent message)
             }
         }
 
+        public void Handle(UpdateInstalledEvent message)
+        {
+            var updateMessage = new ApplicationUpdateMessage();
+            updateMessage.Message = $"Readarr updated from {message.PreviousVerison.ToString()} to {message.NewVersion.ToString()}";
+            updateMessage.PreviousVersion = message.PreviousVerison;
+            updateMessage.NewVersion = message.NewVersion;
+
+            foreach (var notification in _notificationFactory.OnApplicationUpdateEnabled())
+            {
+                try
+                {
+                    notification.OnApplicationUpdate(updateMessage);
+                }
+                catch (Exception ex)
+                {
+                    _logger.Warn(ex, "Unable to send OnApplicationUpdate notification to: " + notification.Definition.Name);
+                }
+            }
+        }
+
         public void HandleAsync(DeleteCompletedEvent message)
         {
             ProcessQueue();
diff --git a/src/NzbDrone.Core/Notifications/Ntfy/Ntfy.cs b/src/NzbDrone.Core/Notifications/Ntfy/Ntfy.cs
index 05790724e..af8f8db72 100644
--- a/src/NzbDrone.Core/Notifications/Ntfy/Ntfy.cs
+++ b/src/NzbDrone.Core/Notifications/Ntfy/Ntfy.cs
@@ -47,6 +47,11 @@ public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
             _proxy.SendNotification(HEALTH_ISSUE_TITLE_BRANDED, healthCheck.Message, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            _proxy.SendNotification(APPLICATION_UPDATE_TITLE_BRANDED, updateMessage.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/Prowl/Prowl.cs b/src/NzbDrone.Core/Notifications/Prowl/Prowl.cs
index afd239a51..0f8509b8a 100644
--- a/src/NzbDrone.Core/Notifications/Prowl/Prowl.cs
+++ b/src/NzbDrone.Core/Notifications/Prowl/Prowl.cs
@@ -46,6 +46,11 @@ public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
             _prowlProxy.SendNotification(HEALTH_ISSUE_TITLE, healthCheck.Message, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            _prowlProxy.SendNotification(APPLICATION_UPDATE_TITLE, updateMessage.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/PushBullet/PushBullet.cs b/src/NzbDrone.Core/Notifications/PushBullet/PushBullet.cs
index 2f297149f..e70ad8f08 100644
--- a/src/NzbDrone.Core/Notifications/PushBullet/PushBullet.cs
+++ b/src/NzbDrone.Core/Notifications/PushBullet/PushBullet.cs
@@ -59,6 +59,11 @@ public override void OnImportFailure(BookDownloadMessage message)
             _proxy.SendNotification(IMPORT_FAILURE_TITLE_BRANDED, message.Message, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            _proxy.SendNotification(APPLICATION_UPDATE_TITLE_BRANDED, updateMessage.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/Pushover/Pushover.cs b/src/NzbDrone.Core/Notifications/Pushover/Pushover.cs
index 5bc4808f7..ccd309d21 100644
--- a/src/NzbDrone.Core/Notifications/Pushover/Pushover.cs
+++ b/src/NzbDrone.Core/Notifications/Pushover/Pushover.cs
@@ -56,6 +56,11 @@ public override void OnImportFailure(BookDownloadMessage message)
             _proxy.SendNotification(IMPORT_FAILURE_TITLE, message.Message, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            _proxy.SendNotification(APPLICATION_UPDATE_TITLE, updateMessage.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/SendGrid/SendGrid.cs b/src/NzbDrone.Core/Notifications/SendGrid/SendGrid.cs
index 95123076e..31f1125a2 100644
--- a/src/NzbDrone.Core/Notifications/SendGrid/SendGrid.cs
+++ b/src/NzbDrone.Core/Notifications/SendGrid/SendGrid.cs
@@ -59,6 +59,11 @@ public override void OnImportFailure(BookDownloadMessage message)
             _proxy.SendNotification(IMPORT_FAILURE_TITLE, message.Message, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            _proxy.SendNotification(APPLICATION_UPDATE_TITLE, updateMessage.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/Slack/Slack.cs b/src/NzbDrone.Core/Notifications/Slack/Slack.cs
index f2d360bec..126f021aa 100644
--- a/src/NzbDrone.Core/Notifications/Slack/Slack.cs
+++ b/src/NzbDrone.Core/Notifications/Slack/Slack.cs
@@ -183,6 +183,23 @@ public override void OnImportFailure(BookDownloadMessage message)
             _proxy.SendPayload(payload, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            var attachments = new List<Attachment>
+                              {
+                                  new Attachment
+                                  {
+                                      Title = Environment.MachineName,
+                                      Text = updateMessage.Message,
+                                      Color = "good"
+                                  }
+                              };
+
+            var payload = CreatePayload("Application Updated", attachments);
+
+            _proxy.SendPayload(payload, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/Telegram/Telegram.cs b/src/NzbDrone.Core/Notifications/Telegram/Telegram.cs
index 102841583..905551fe1 100644
--- a/src/NzbDrone.Core/Notifications/Telegram/Telegram.cs
+++ b/src/NzbDrone.Core/Notifications/Telegram/Telegram.cs
@@ -56,6 +56,11 @@ public override void OnImportFailure(BookDownloadMessage message)
             _proxy.SendNotification(IMPORT_FAILURE_TITLE, message.Message, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            _proxy.SendNotification(APPLICATION_UPDATE_TITLE, updateMessage.Message, Settings);
+        }
+
         public override ValidationResult Test()
         {
             var failures = new List<ValidationFailure>();
diff --git a/src/NzbDrone.Core/Notifications/Twitter/Twitter.cs b/src/NzbDrone.Core/Notifications/Twitter/Twitter.cs
index 6ac803481..734d3161b 100644
--- a/src/NzbDrone.Core/Notifications/Twitter/Twitter.cs
+++ b/src/NzbDrone.Core/Notifications/Twitter/Twitter.cs
@@ -58,6 +58,11 @@ public override void OnImportFailure(BookDownloadMessage message)
             _twitterService.SendNotification($"Import Failed: {message.Message}", Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            _twitterService.SendNotification($"Application Updated: {updateMessage.Message}", Settings);
+        }
+
         public override object RequestAction(string action, IDictionary<string, string> query)
         {
             if (action == "startOAuth")
diff --git a/src/NzbDrone.Core/Notifications/Webhook/Webhook.cs b/src/NzbDrone.Core/Notifications/Webhook/Webhook.cs
index e952060fa..aef9671b4 100644
--- a/src/NzbDrone.Core/Notifications/Webhook/Webhook.cs
+++ b/src/NzbDrone.Core/Notifications/Webhook/Webhook.cs
@@ -133,6 +133,19 @@ public override void OnHealthIssue(HealthCheck.HealthCheck healthCheck)
             _proxy.SendWebhook(payload, Settings);
         }
 
+        public override void OnApplicationUpdate(ApplicationUpdateMessage updateMessage)
+        {
+            var payload = new WebhookApplicationUpdatePayload
+            {
+                EventType = WebhookEventType.ApplicationUpdate,
+                Message = updateMessage.Message,
+                PreviousVersion = updateMessage.PreviousVersion.ToString(),
+                NewVersion = updateMessage.NewVersion.ToString()
+            };
+
+            _proxy.SendWebhook(payload, Settings);
+        }
+
         public override string Name => "Webhook";
 
         public override ValidationResult Test()
diff --git a/src/NzbDrone.Core/Notifications/Webhook/WebhookApplicationUpdatePayload.cs b/src/NzbDrone.Core/Notifications/Webhook/WebhookApplicationUpdatePayload.cs
new file mode 100644
index 000000000..e05be69bc
--- /dev/null
+++ b/src/NzbDrone.Core/Notifications/Webhook/WebhookApplicationUpdatePayload.cs
@@ -0,0 +1,11 @@
+using NzbDrone.Core.HealthCheck;
+
+namespace NzbDrone.Core.Notifications.Webhook
+{
+    public class WebhookApplicationUpdatePayload : WebhookPayload
+    {
+        public string Message { get; set; }
+        public string PreviousVersion { get; set; }
+        public string NewVersion { get; set; }
+    }
+}
diff --git a/src/NzbDrone.Core/Notifications/Webhook/WebhookEventType.cs b/src/NzbDrone.Core/Notifications/Webhook/WebhookEventType.cs
index 4c2fd85cf..4fb7ee7ef 100644
--- a/src/NzbDrone.Core/Notifications/Webhook/WebhookEventType.cs
+++ b/src/NzbDrone.Core/Notifications/Webhook/WebhookEventType.cs
@@ -14,6 +14,7 @@ public enum WebhookEventType
         Rename,
         Delete,
         Health,
-        Retag
+        Retag,
+        ApplicationUpdate
     }
 }
diff --git a/src/Readarr.Api.V1/Notifications/NotificationResource.cs b/src/Readarr.Api.V1/Notifications/NotificationResource.cs
index 7642c8f4c..20b313651 100644
--- a/src/Readarr.Api.V1/Notifications/NotificationResource.cs
+++ b/src/Readarr.Api.V1/Notifications/NotificationResource.cs
@@ -17,6 +17,7 @@ public class NotificationResource : ProviderResource<NotificationResource>
         public bool OnDownloadFailure { get; set; }
         public bool OnImportFailure { get; set; }
         public bool OnBookRetag { get; set; }
+        public bool OnApplicationUpdate { get; set; }
         public bool SupportsOnGrab { get; set; }
         public bool SupportsOnReleaseImport { get; set; }
         public bool SupportsOnUpgrade { get; set; }
@@ -30,6 +31,7 @@ public class NotificationResource : ProviderResource<NotificationResource>
         public bool SupportsOnDownloadFailure { get; set; }
         public bool SupportsOnImportFailure { get; set; }
         public bool SupportsOnBookRetag { get; set; }
+        public bool SupportsOnApplicationUpdate { get; set; }
         public string TestCommand { get; set; }
     }
 
@@ -56,6 +58,7 @@ public override NotificationResource ToResource(NotificationDefinition definitio
             resource.OnDownloadFailure = definition.OnDownloadFailure;
             resource.OnImportFailure = definition.OnImportFailure;
             resource.OnBookRetag = definition.OnBookRetag;
+            resource.OnApplicationUpdate = definition.OnApplicationUpdate;
             resource.SupportsOnGrab = definition.SupportsOnGrab;
             resource.SupportsOnReleaseImport = definition.SupportsOnReleaseImport;
             resource.SupportsOnUpgrade = definition.SupportsOnUpgrade;
@@ -69,6 +72,7 @@ public override NotificationResource ToResource(NotificationDefinition definitio
             resource.SupportsOnDownloadFailure = definition.SupportsOnDownloadFailure;
             resource.SupportsOnImportFailure = definition.SupportsOnImportFailure;
             resource.SupportsOnBookRetag = definition.SupportsOnBookRetag;
+            resource.SupportsOnApplicationUpdate = definition.SupportsOnApplicationUpdate;
 
             return resource;
         }
@@ -94,6 +98,7 @@ public override NotificationDefinition ToModel(NotificationResource resource)
             definition.OnDownloadFailure = resource.OnDownloadFailure;
             definition.OnImportFailure = resource.OnImportFailure;
             definition.OnBookRetag = resource.OnBookRetag;
+            definition.OnApplicationUpdate = resource.OnApplicationUpdate;
             definition.SupportsOnGrab = resource.SupportsOnGrab;
             definition.SupportsOnReleaseImport = resource.SupportsOnReleaseImport;
             definition.SupportsOnUpgrade = resource.SupportsOnUpgrade;
@@ -107,6 +112,7 @@ public override NotificationDefinition ToModel(NotificationResource resource)
             definition.SupportsOnDownloadFailure = resource.SupportsOnDownloadFailure;
             definition.SupportsOnImportFailure = resource.SupportsOnImportFailure;
             definition.SupportsOnBookRetag = resource.SupportsOnBookRetag;
+            definition.SupportsOnApplicationUpdate = resource.SupportsOnApplicationUpdate;
 
             return definition;
         }