Merge branch 'fckoppenol-master'

src/IF.Lastfm.Core.Tests/Api/Commands/ArtistGetTopTagsCommandTests.cs

@@ -18,7 +18,7 @@ public class ArtistGetTopTagsCommandTests : CommandTestsBase
         [SetUp]
         public void Initialise()
         {
-            _command = new GetTopTagsCommand(MAuth.Object, "");
+            _command = new GetTopTagsCommand(MAuth.Object);
         }
 
         [Test]

src/IF.Lastfm.Core/Api/ArtistApi.cs

@@ -104,8 +104,9 @@ public Task<PageResponse<LastTag>> GetTagsByUserAsync(string artist, string user
 
         public Task<PageResponse<LastTag>> GetTopTagsAsync(string artist, bool autocorrect = false)
         {
-            var command = new GetTopTagsCommand(Auth, artist)
+            var command = new GetTopTagsCommand(Auth)
             {
+                ArtistName = artist,
                 Autocorrect = autocorrect,
                 HttpClient = HttpClient
             };
@@ -113,6 +114,19 @@ public Task<PageResponse<LastTag>> GetTopTagsAsync(string artist, bool autocorre
             return command.ExecuteAsync();
         }
 
+        public Task<PageResponse<LastTag>> GetTopTagsByMbidAsync(string mbid, bool autocorrect = false)
+        {
+            var command = new GetTopTagsCommand(Auth)
+            {
+                ArtistMbid = mbid,
+                Autocorrect = autocorrect,
+                HttpClient = HttpClient
+            };
+
+            return command.ExecuteAsync();
+        }
+
+
         public async Task<PageResponse<LastShout>> GetShoutsAsync(string artist, int page = 0, int count = LastFm.DefaultPageLength, bool autocorrect = false)
         {
             var command = new GetShoutsCommand(Auth, artist)

src/IF.Lastfm.Core/Api/Commands/Artist/GetTopTagsCommand.cs

@@ -12,18 +12,40 @@ namespace IF.Lastfm.Core.Api.Commands.Artist
     [ApiMethodName("artist.getTopTags")]
     internal class GetTopTagsCommand : GetAsyncCommandBase<PageResponse<LastTag>>
     {
+        public string ArtistMbid { get; set; }
+
         public string ArtistName { get; set; }
 
         public bool Autocorrect { get; set; }
 
-        public GetTopTagsCommand(ILastAuth auth, string artistName) : base(auth)
+        public GetTopTagsCommand(ILastAuth auth) : base(auth)
         {
-            ArtistName = artistName;
         }
         
         public override void SetParameters()
         {
-            Parameters.Add("artist", ArtistName);
+            var hasMbid = !string.IsNullOrEmpty(ArtistMbid);
+            var hasName = !string.IsNullOrEmpty(ArtistName);
+
+            if (!hasMbid && !hasName)
+            {
+                throw new InvalidOperationException($"Either {nameof(ArtistMbid)} or {nameof(ArtistName)} must be set");
+            }
+
+            if (hasMbid && hasName)
+            {
+                throw new InvalidOperationException($"");
+            }
+
+            if (hasMbid)
+            {
+                Parameters.Add("mbid", ArtistMbid);
+            }
+            else
+            {
+                Parameters.Add("artist", ArtistName);
+            }
+
             Parameters.Add("autocorrect", Convert.ToInt32(Autocorrect).ToString());
         }
 
@@ -38,7 +60,7 @@ public override async Task<PageResponse<LastTag>> HandleResponse(HttpResponseMes
                 var resultsToken = jtoken.SelectToken("toptags");
                 var itemsToken = resultsToken.SelectToken("tag");
 
-                return PageResponse<LastTag>.CreateSuccessResponse(itemsToken, token => LastTag.ParseJToken(token));
+                return PageResponse<LastTag>.CreateSuccessResponse(itemsToken, LastTag.ParseJToken);
             }
             else
             {