New: Auto map known legacy BaseUrls for non-Cardigann

src/NzbDrone.Core/Datastore/TableMapping.cs

@@ -50,6 +50,7 @@ namespace NzbDrone.Core.Datastore
                   .Ignore(i => i.Language)
                   .Ignore(i => i.Encoding)
                   .Ignore(i => i.IndexerUrls)
+                  .Ignore(i => i.LegacyUrls)
                   .Ignore(i => i.Protocol)
                   .Ignore(i => i.Privacy)
                   .Ignore(i => i.SupportsRss)

src/NzbDrone.Core/Indexers/Definitions/BroadcastheNet/BroadcastheNet.cs

@@ -20,6 +20,8 @@ namespace NzbDrone.Core.Indexers.BroadcastheNet
         public override TimeSpan RateLimit => TimeSpan.FromSeconds(5);
 
         public override string[] IndexerUrls => new string[] { "https://api.broadcasthe.net/" };
+        public override string[] LegacyUrls => new string[] { "http://api.broadcasthe.net/" };
+
         public override string Description => "BroadcasTheNet (BTN) is an invite-only torrent tracker focused on TV shows";
 
         public BroadcastheNet(IIndexerHttpClient httpClient, IEventAggregator eventAggregator, IIndexerStatusService indexerStatusService, IConfigService configService, Logger logger)

src/NzbDrone.Core/Indexers/Definitions/Cardigann/Cardigann.cs

@@ -126,6 +126,7 @@ namespace NzbDrone.Core.Indexers.Cardigann
                 Description = definition.Description,
                 Implementation = GetType().Name,
                 IndexerUrls = definition.Links.ToArray(),
+                LegacyUrls = definition.Legacylinks.ToArray(),
                 Settings = new CardigannSettings { DefinitionFile = definition.File },
                 Protocol = DownloadProtocol.Torrent,
                 Privacy = definition.Type switch

src/NzbDrone.Core/Indexers/HttpIndexerBase.cs

@@ -33,6 +33,7 @@ namespace NzbDrone.Core.Indexers
 
         public override Encoding Encoding => Encoding.UTF8;
         public override string Language => "en-US";
+        public override string[] LegacyUrls => new string[] { };
 
         public override bool FollowRedirect => false;
         public override IndexerCapabilities Capabilities { get; protected set; }

src/NzbDrone.Core/Indexers/IIndexer.cs

@@ -14,6 +14,7 @@ namespace NzbDrone.Core.Indexers
         IndexerCapabilities Capabilities { get; }
 
         string[] IndexerUrls { get; }
+        string[] LegacyUrls { get; }
         string Description { get; }
         Encoding Encoding { get; }
         string Language { get; }

src/NzbDrone.Core/Indexers/IndexerBase.cs

@@ -22,6 +22,7 @@ namespace NzbDrone.Core.Indexers
 
         public abstract string Name { get; }
         public abstract string[] IndexerUrls { get; }
+        public abstract string[] LegacyUrls { get; }
         public abstract string Description { get; }
         public abstract Encoding Encoding { get; }
         public abstract string Language { get; }
@@ -147,9 +148,17 @@ namespace NzbDrone.Core.Indexers
 
         protected TSettings GetDefaultBaseUrl(TSettings settings)
         {
-            if (settings.BaseUrl.IsNullOrWhiteSpace() && IndexerUrls.First().IsNotNullOrWhiteSpace())
+            var defaultLink = IndexerUrls.FirstOrDefault();
+
+            if (settings.BaseUrl.IsNullOrWhiteSpace() && defaultLink.IsNotNullOrWhiteSpace())
+            {
+                settings.BaseUrl = defaultLink;
+            }
+
+            if (settings.BaseUrl.IsNotNullOrWhiteSpace() && LegacyUrls.Contains(settings.BaseUrl))
             {
-                settings.BaseUrl = IndexerUrls.First();
+                _logger.Debug(string.Format("Changing legacy site link from {0} to {1}", settings.BaseUrl, defaultLink));
+                settings.BaseUrl = defaultLink;
             }
 
             return settings;

src/NzbDrone.Core/Indexers/IndexerDefinition.cs

@@ -11,6 +11,7 @@ namespace NzbDrone.Core.Indexers
     public class IndexerDefinition : ProviderDefinition
     {
         public string[] IndexerUrls { get; set; }
+        public string[] LegacyUrls { get; set; }
         public string Description { get; set; }
         public Encoding Encoding { get; set; }
         public string Language { get; set; }

src/NzbDrone.Core/Indexers/IndexerFactory.cs

@@ -110,6 +110,7 @@ namespace NzbDrone.Core.Indexers
             }
 
             definition.IndexerUrls = defFile.Links.ToArray();
+            definition.LegacyUrls = defFile.Legacylinks.ToArray();
             definition.Description = defFile.Description;
             definition.Language = defFile.Language;
             definition.Encoding = Encoding.GetEncoding(defFile.Encoding);
@@ -205,6 +206,7 @@ namespace NzbDrone.Core.Indexers
             if (definition.Implementation != typeof(Cardigann.Cardigann).Name)
             {
                 definition.IndexerUrls = provider.IndexerUrls;
+                definition.LegacyUrls = provider.LegacyUrls;
                 definition.Privacy = provider.Privacy;
                 definition.Description = provider.Description;
                 definition.Encoding = provider.Encoding;

src/Prowlarr.Api.V1/Indexers/IndexerResource.cs

@@ -15,6 +15,7 @@ namespace Prowlarr.Api.V1.Indexers
     public class IndexerResource : ProviderResource<IndexerResource>
     {
         public string[] IndexerUrls { get; set; }
+        public string[] LegacyUrls { get; set; }
         public string DefinitionName { get; set; }
         public string Description { get; set; }
         public string Language { get; set; }
@@ -81,6 +82,7 @@ namespace Prowlarr.Api.V1.Indexers
             resource.InfoLink = string.Format("https://wiki.servarr.com/prowlarr/supported-indexers#{0}", infoLinkName.ToLower().Replace(' ', '-'));
             resource.AppProfileId = definition.AppProfileId;
             resource.IndexerUrls = definition.IndexerUrls;
+            resource.LegacyUrls = definition.LegacyUrls;
             resource.Description = definition.Description;
             resource.Language = definition.Language;
             resource.Encoding = definition.Encoding?.EncodingName ?? null;