New: Make monitoring existing albums on an import list optional

(cherry picked from commit b05bd685bc1bbd04d4b25b83a9fdd4ab3c4651ee)
(cherry picked from commit efa7465666e89e18b757585dd509fd039428156c)

frontend/src/Settings/ImportLists/ImportLists/EditImportListModalContent.js

@@ -75,6 +75,7 @@ function EditImportListModalContent(props) {
     name,
     enableAutomaticAdd,
     shouldMonitor,
+    shouldMonitorExisting,
     shouldSearch,
     rootFolderPath,
     monitorNewItems,
@@ -173,12 +174,28 @@ function EditImportListModalContent(props) {
                 </FormGroup>
 
                 <FormGroup>
-                  <FormLabel>Search for New Items</FormLabel>
+                  <FormLabel>
+                    {translate('ShouldMonitorExisting')}
+                  </FormLabel>
+
+                  <FormInputGroup
+                    type={inputTypes.CHECK}
+                    name="shouldMonitorExisting"
+                    helpText={translate('ShouldMonitorExistingHelpText')}
+                    {...shouldMonitorExisting}
+                    onChange={onInputChange}
+                  />
+                </FormGroup>
+
+                <FormGroup>
+                  <FormLabel>
+                    {translate('ShouldSearch')}
+                  </FormLabel>
 
                   <FormInputGroup
                     type={inputTypes.CHECK}
                     name="shouldSearch"
-                    helpText={'Search indexers for newly added items.  Use with caution for large lists.'}
+                    helpText={translate('ShouldSearchHelpText')}
                     {...shouldSearch}
                     onChange={onInputChange}
                   />

src/Lidarr.Api.V1/ImportLists/ImportListResource.cs

@@ -7,6 +7,7 @@ namespace Lidarr.Api.V1.ImportLists
     {
         public bool EnableAutomaticAdd { get; set; }
         public ImportListMonitorType ShouldMonitor { get; set; }
+        public bool ShouldMonitorExisting { get; set; }
         public bool ShouldSearch { get; set; }
         public string RootFolderPath { get; set; }
         public NewItemMonitorTypes MonitorNewItems { get; set; }
@@ -29,6 +30,7 @@ namespace Lidarr.Api.V1.ImportLists
 
             resource.EnableAutomaticAdd = definition.EnableAutomaticAdd;
             resource.ShouldMonitor = definition.ShouldMonitor;
+            resource.ShouldMonitorExisting = definition.ShouldMonitorExisting;
             resource.ShouldSearch = definition.ShouldSearch;
             resource.RootFolderPath = definition.RootFolderPath;
             resource.MonitorNewItems = definition.MonitorNewItems;
@@ -51,6 +53,7 @@ namespace Lidarr.Api.V1.ImportLists
 
             definition.EnableAutomaticAdd = resource.EnableAutomaticAdd;
             definition.ShouldMonitor = resource.ShouldMonitor;
+            definition.ShouldMonitorExisting = resource.ShouldMonitorExisting;
             definition.ShouldSearch = resource.ShouldSearch;
             definition.RootFolderPath = resource.RootFolderPath;
             definition.MonitorNewItems = resource.MonitorNewItems;

src/NzbDrone.Core/Datastore/Migration/058_import_list_monitor_existing.cs

@@ -0,0 +1,14 @@
+using FluentMigrator;
+using NzbDrone.Core.Datastore.Migration.Framework;
+
+namespace NzbDrone.Core.Datastore.Migration
+{
+    [Migration(58)]
+    public class ImportListMonitorExisting : NzbDroneMigrationBase
+    {
+        protected override void MainDbUpgrade()
+        {
+            Alter.Table("ImportLists").AddColumn("ShouldMonitorExisting").AsInt32().WithDefaultValue(0);
+        }
+    }
+}

src/NzbDrone.Core/ImportLists/ImportListDefinition.cs

@@ -7,6 +7,7 @@ namespace NzbDrone.Core.ImportLists
     {
         public bool EnableAutomaticAdd { get; set; }
         public ImportListMonitorType ShouldMonitor { get; set; }
+        public bool ShouldMonitorExisting { get; set; }
         public NewItemMonitorTypes MonitorNewItems { get; set; }
         public bool ShouldSearch { get; set; }
         public int ProfileId { get; set; }

src/NzbDrone.Core/ImportLists/ImportListSyncService.cs

@@ -184,7 +184,7 @@ namespace NzbDrone.Core.ImportLists
             {
                 _logger.Debug("{0} [{1}] Rejected, Album Exists in DB.  Ensuring Album and Artist monitored.", report.AlbumMusicBrainzId, report.Album);
 
-                if (importList.ShouldMonitor != ImportListMonitorType.None)
+                if (importList.ShouldMonitorExisting && importList.ShouldMonitor != ImportListMonitorType.None)
                 {
                     if (!existingAlbum.Monitored)
                     {
@@ -288,7 +288,7 @@ namespace NzbDrone.Core.ImportLists
             {
                 _logger.Debug("{0} [{1}] Rejected, artist exists in DB.  Ensuring artist monitored", report.ArtistMusicBrainzId, report.Artist);
 
-                if (!existingArtist.Monitored)
+                if (importList.ShouldMonitorExisting && !existingArtist.Monitored)
                 {
                     existingArtist.Monitored = true;
                     _artistService.UpdateArtist(existingArtist);

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

@@ -551,6 +551,10 @@
   "Settings": "Settings",
   "ShortDateFormat": "Short Date Format",
   "ShouldMonitorHelpText": "Monitor artists and albums added from this list",
+  "ShouldMonitorExisting": "Monitor existing albums",
+  "ShouldMonitorExistingHelpText": "Automatically monitor albums on this list which are already in Lidarr",
+  "ShouldSearch": "Search for New Items",
+  "ShouldSearchHelpText": "Search indexers for newly added items.  Use with caution for large lists.",
   "ShowAlbumCount": "Show Album Count",
   "ShowBanners": "Show Banners",
   "ShowBannersHelpText": "Show banners instead of names",