[spotify] Scan spotify podcast subscriptions into library

src/inputs/spotify.c

@@ -144,3 +144,14 @@ spotify_status_get(struct spotify_status *status)
 
   backend->status_get(status);
 }
+
+bool
+spotify_podcast_support()
+{
+  struct spotify_backend *backend = backend_set();
+
+  if (!backend)
+    return false;
+
+  return backend->has_podcast_support;
+}

src/inputs/spotify.h

@@ -21,6 +21,8 @@ struct spotify_backend
   int (*relogin)(void);
   void (*uri_register)(const char *uri);
   void (*status_get)(struct spotify_status *status);
+
+  bool has_podcast_support;
 };
 
 int
@@ -47,4 +49,7 @@ spotify_uri_register(const char *uri);
 void
 spotify_status_get(struct spotify_status *status);
 
+bool
+spotify_podcast_support();
+
 #endif /* !__SPOTIFY_H__ */

src/inputs/spotify_librespotc.c

@@ -749,5 +749,7 @@ struct spotify_backend spotify_librespotc =
   .logout = logout,
   .relogin = relogin,
   .status_get = status_get,
+
+  .has_podcast_support = true,
 };
 

src/inputs/spotify_libspotify.c

@@ -129,5 +129,7 @@ struct spotify_backend spotify_libspotify =
   .relogin = libspotify_relogin,
   .uri_register = libspotify_uri_register,
   .status_get = status_get,
+
+  .has_podcast_support = false,
 };