Adds Newznab Album Search Support

Adds Newznab Album Search Support

src/NzbDrone.Core/Indexers/Newznab/Newznab.cs

@@ -106,6 +106,9 @@ namespace NzbDrone.Core.Indexers.Newznab
                     return null;
                 }
 
+                if (capabilities.SupportedAudioSearchParameters != null &&
+                    new[] { "artist", "album" }.All(v => capabilities.SupportedAudioSearchParameters.Contains(v)))
+
                 if (capabilities.SupportedTvSearchParameters != null &&
                     new[] { "q", "tvdbid", "rid" }.Any(v => capabilities.SupportedTvSearchParameters.Contains(v)) &&
                     new[] { "season", "ep" }.All(v => capabilities.SupportedTvSearchParameters.Contains(v)))

src/NzbDrone.Core/Indexers/Newznab/NewznabCapabilities.cs

@@ -8,6 +8,7 @@ namespace NzbDrone.Core.Indexers.Newznab
         public int MaxPageSize { get; set; }
         public string[] SupportedSearchParameters { get; set; }
         public string[] SupportedTvSearchParameters { get; set; }
+        public string[] SupportedAudioSearchParameters { get; set; }
         public bool SupportsAggregateIdSearch { get; set; }
         public List<NewznabCategory> Categories { get; set; }
 
@@ -17,6 +18,7 @@ namespace NzbDrone.Core.Indexers.Newznab
             MaxPageSize = 100;
             SupportedSearchParameters = new[] { "q" };
             SupportedTvSearchParameters = new[] { "q", "rid", "season", "ep" }; // This should remain 'rid' for older newznab installs.
+            SupportedAudioSearchParameters = new[] { "q", "artist", "album" };
             SupportsAggregateIdSearch = false;
             Categories = new List<NewznabCategory>();
         }

src/NzbDrone.Core/Indexers/Newznab/NewznabCapabilitiesProvider.cs

@@ -115,6 +115,18 @@ namespace NzbDrone.Core.Indexers.Newznab
                     capabilities.SupportedTvSearchParameters = xmlTvSearch.Attribute("supportedParams").Value.Split(',');
                     capabilities.SupportsAggregateIdSearch = true;
                 }
+
+                var xmlAudioSearch = xmlSearching.Element("audio-search");
+                if (xmlAudioSearch == null || xmlAudioSearch.Attribute("available").Value != "yes")
+                {
+                    capabilities.SupportedAudioSearchParameters = null;
+                }
+                else if (xmlAudioSearch.Attribute("supportedParams") != null)
+                {
+                    capabilities.SupportedAudioSearchParameters = xmlAudioSearch.Attribute("supportedParams").Value.Split(',');
+                                 
+                    //capabilities.SupportsAggregateIdSearch = true;
+                }
             }
 
             var xmlCategories = xmlRoot.Element("categories");

src/NzbDrone.Core/Indexers/Newznab/NewznabRequestGenerator.cs

@@ -45,6 +45,19 @@ namespace NzbDrone.Core.Indexers.Newznab
             }
         }
 
+        private bool SupportsAudioSearch
+        {
+            get
+            {
+                var capabilities = _capabilitiesProvider.GetCapabilities(Settings);
+
+                return capabilities.SupportedAudioSearchParameters != null &&
+                       capabilities.SupportedAudioSearchParameters.Contains("q") &&
+                       capabilities.SupportedAudioSearchParameters.Contains("artist") &&
+                       capabilities.SupportedAudioSearchParameters.Contains("album");
+            }
+        }
+
         private bool SupportsTvdbSearch
         {
             get
@@ -182,7 +195,14 @@ namespace NzbDrone.Core.Indexers.Newznab
 
         public IndexerPageableRequestChain GetSearchRequests(AlbumSearchCriteria searchCriteria)
         {
-            throw new System.NotImplementedException();
+            var pageableRequests = new IndexerPageableRequestChain();
+
+            AddAudioPageableRequests(pageableRequests, MaxPages, Settings.Categories, searchCriteria,
+                string.Format("&artist={0}&album={1}",
+                    searchCriteria.Artist.Name,
+                    searchCriteria.Album.Title));
+
+            return pageableRequests;
         }
 
         public IndexerPageableRequestChain GetSearchRequests(ArtistSearchCriteria searchCriteria)
@@ -250,6 +270,20 @@ namespace NzbDrone.Core.Indexers.Newznab
             }
         }
 
+        private void AddAudioPageableRequests(IndexerPageableRequestChain chain, int maxPages, IEnumerable<int> categories, SearchCriteriaBase searchCriteria, string parameters)
+        {
+
+            if (SupportsAudioSearch)
+            {
+                chain.AddTier();
+                
+                    chain.Add(GetPagedRequests(MaxPages, Settings.Categories, "music",
+                        string.Format("&q={0}",
+                        parameters)));
+                
+            }
+        }
+
         private IEnumerable<IndexerRequest> GetPagedRequests(int maxPages, IEnumerable<int> categories, string searchType, string parameters)
         {
             if (categories.Empty())