Subsonic API: handle new field mediaType

src/libs/subsonic/impl/responses/Album.cpp

@@ -132,6 +132,9 @@ namespace API::Subsonic
             albumNode.setAttribute("starred", StringUtils::toISO8601String(dateTime)); // TODO report correct date/time
 
         // OpenSubsonic specific fields (must always be set)
+        if (!id3)
+            albumNode.setAttribute("mediaType", "album");
+
         {
             std::optional<UUID> mbid{ release->getMBID() };
             albumNode.setAttribute("musicBrainzId", mbid ? mbid->getAsString() : "");

src/libs/subsonic/impl/responses/Artist.cpp

@@ -90,6 +90,9 @@ namespace API::Subsonic
             artistNode.setAttribute("starred", StringUtils::toISO8601String(dateTime));
 
         // OpenSubsonic specific fields (must always be set)
+        if (!id3)
+            artistNode.setAttribute("mediaType", "artist");
+
         {
             std::optional<UUID> mbid{ artist->getMBID() };
             artistNode.setAttribute("musicBrainzId", mbid ? mbid->getAsString() : "");

src/libs/subsonic/impl/responses/Song.cpp

@@ -157,6 +157,8 @@ namespace API::Subsonic
         }
 
         // OpenSubsonic specific fields (must always be set)
+        trackResponse.setAttribute("mediaType", "song");
+
         {
             std::optional<UUID> mbid{ track->getRecordingMBID() };
             trackResponse.setAttribute("musicBrainzId", mbid ? mbid->getAsString() : "");