feat(subsonic): add groupings field to OpenSubsonic Child response

Include the ID3 grouping tag in OpenSubsonic responses as an array of
strings, per opensubsonic/open-subsonic-api#232. The grouping tag was
already being extracted and stored in MediaFile.Tags via mappings.yaml
aliases (GRP1, GROUPING, ©grp, wm/contentgroupdescription), so this
change only adds the field to the response struct and populates it in
both song and album child builders.

Signed-off-by: Deluan <deluan@navidrome.org>

server/subsonic/helpers.go

@@ -266,6 +266,7 @@ func osChildFromMediaFile(ctx context.Context, mf model.MediaFile) *responses.Op
 	child.BitDepth = int32(mf.BitDepth)
 	child.Genres = toItemGenres(mf.Genres)
 	child.Moods = mf.Tags.Values(model.TagMood)
+	child.Groupings = mf.Tags.Values(model.TagGrouping)
 	child.DisplayArtist = mf.Artist
 	child.Artists = artistRefs(mf.Participants[model.RoleArtist])
 	child.DisplayAlbumArtist = mf.AlbumArtist
@@ -375,6 +376,7 @@ func osChildFromAlbum(ctx context.Context, al model.Album) *responses.OpenSubson
 	child.MusicBrainzId = al.MbzAlbumID
 	child.Genres = toItemGenres(al.Genres)
 	child.Moods = al.Tags.Values(model.TagMood)
+	child.Groupings = al.Tags.Values(model.TagGrouping)
 	child.DisplayArtist = al.AlbumArtist
 	child.Artists = artistRefs(al.Participants[model.RoleAlbumArtist])
 	child.DisplayAlbumArtist = al.AlbumArtist

server/subsonic/responses/.snapshots/Responses AlbumList with OS data should match .JSON

@@ -56,7 +56,10 @@
         "displayAlbumArtist": "Display album artist",
         "contributors": [],
         "displayComposer": "",
-        "explicitStatus": "explicit"
+        "explicitStatus": "explicit",
+        "groupings": [
+          "Soundtrack"
+        ]
       }
     ]
   }

server/subsonic/responses/.snapshots/Responses AlbumList with OS data should match .XML

@@ -9,6 +9,7 @@
       <artists id="artist-2" name="Artist 2"></artists>
       <albumArtists id="album-artist-1" name="Artist 1"></albumArtists>
       <albumArtists id="album-artist-2" name="Artist 2"></albumArtists>
+      <groupings>Soundtrack</groupings>
     </album>
   </albumList>
 </subsonic-response>

server/subsonic/responses/.snapshots/Responses AlbumWithSongsID3 with data should match .JSON

@@ -165,7 +165,11 @@
           }
         ],
         "displayComposer": "composer 1 \u0026 composer 2",
-        "explicitStatus": "clean"
+        "explicitStatus": "clean",
+        "groupings": [
+          "Soundtrack",
+          "Live"
+        ]
       },
       {
         "id": "2",
@@ -210,7 +214,8 @@
         "displayAlbumArtist": "",
         "contributors": [],
         "displayComposer": "",
-        "explicitStatus": ""
+        "explicitStatus": "",
+        "groupings": []
       }
     ]
   }

server/subsonic/responses/.snapshots/Responses AlbumWithSongsID3 with data should match .XML

@@ -32,6 +32,8 @@
       <contributors role="role2" subRole="subrole4">
         <artist id="2" name="artist2"></artist>
       </contributors>
+      <groupings>Soundtrack</groupings>
+      <groupings>Live</groupings>
     </song>
     <song id="2" isDir="true" title="title" album="album" artist="artist" track="1" year="1985" genre="Rock" coverArt="1" size="8421341" contentType="audio/flac" suffix="flac" starred="2016-03-02T20:30:00Z" transcodedContentType="audio/mpeg" transcodedSuffix="mp3" duration="146" bitRate="320">
       <replayGain trackGain="0" albumGain="0" trackPeak="0" albumPeak="0" baseGain="0" fallbackGain="0"></replayGain>

server/subsonic/responses/.snapshots/Responses Child with data should match .JSON

@@ -110,7 +110,11 @@
           }
         ],
         "displayComposer": "composer 1 \u0026 composer 2",
-        "explicitStatus": "clean"
+        "explicitStatus": "clean",
+        "groupings": [
+          "Soundtrack",
+          "Live"
+        ]
       },
       {
         "id": "",
@@ -141,7 +145,8 @@
         "displayAlbumArtist": "",
         "contributors": [],
         "displayComposer": "",
-        "explicitStatus": ""
+        "explicitStatus": "",
+        "groupings": []
       }
     ],
     "id": "1",

server/subsonic/responses/.snapshots/Responses Child with data should match .XML

@@ -24,6 +24,8 @@
       <contributors role="composer">
         <artist id="4" name="composer2"></artist>
       </contributors>
+      <groupings>Soundtrack</groupings>
+      <groupings>Live</groupings>
     </child>
     <child id="" isDir="false" title="">
       <replayGain trackGain="0" albumGain="0" trackPeak="0" albumPeak="0" baseGain="0" fallbackGain="0"></replayGain>

server/subsonic/responses/.snapshots/Responses Child without data should match OpenSubsonic .JSON

@@ -28,7 +28,8 @@
         "displayAlbumArtist": "",
         "contributors": [],
         "displayComposer": "",
-        "explicitStatus": ""
+        "explicitStatus": "",
+        "groupings": []
       }
     ],
     "id": "",

server/subsonic/responses/responses.go

@@ -189,6 +189,7 @@ type OpenSubsonicChild struct {
 	Contributors       Array[Contributor]  `xml:"contributors,omitempty"            json:"contributors"`
 	DisplayComposer    string              `xml:"displayComposer,attr,omitempty"    json:"displayComposer"`
 	ExplicitStatus     string              `xml:"explicitStatus,attr,omitempty"     json:"explicitStatus"`
+	Groupings          Array[string]       `xml:"groupings,omitempty"               json:"groupings"`
 }
 
 type Songs struct {

server/subsonic/responses/responses_test.go

@@ -224,6 +224,7 @@ var _ = Describe("Responses", func() {
 					Isrc: []string{"ISRC-1", "ISRC-2"},
 					BPM:  127, ChannelCount: 2, SamplingRate: 44100, BitDepth: 16,
 					Moods:         []string{"happy", "sad"},
+					Groupings:     []string{"Soundtrack", "Live"},
 					ReplayGain:    ReplayGain{TrackGain: gg.P(1.0), AlbumGain: gg.P(2.0), TrackPeak: gg.P(3.0), AlbumPeak: gg.P(4.0), BaseGain: gg.P(5.0), FallbackGain: gg.P(6.0)},
 					DisplayArtist: "artist 1 & artist 2",
 					Artists: []ArtistID3Ref{
@@ -320,6 +321,7 @@ var _ = Describe("Responses", func() {
 					Comment: "a comment", MediaType: MediaTypeSong, MusicBrainzId: "4321", SortName: "sorted song",
 					Isrc:       []string{"ISRC-1"},
 					Moods:      []string{"happy", "sad"},
+					Groupings:  []string{"Soundtrack", "Live"},
 					ReplayGain: ReplayGain{TrackGain: gg.P(1.0), AlbumGain: gg.P(2.0), TrackPeak: gg.P(3.0), AlbumPeak: gg.P(4.0), BaseGain: gg.P(5.0), FallbackGain: gg.P(6.0)},
 					BPM:        127, ChannelCount: 2, SamplingRate: 44100, BitDepth: 16,
 					DisplayArtist: "artist1 & artist2",
@@ -424,6 +426,7 @@ var _ = Describe("Responses", func() {
 						ItemGenre{Name: "Genre 2"},
 					},
 					Moods:         []string{"mood1", "mood2"},
+					Groupings:     []string{"Soundtrack"},
 					DisplayArtist: "Display artist",
 					Artists: Array[ArtistID3Ref]{
 						ArtistID3Ref{Id: "artist-1", Name: "Artist 1"},