libsaria: Don't require filename when creating a Playlist

A Playlist created without a filename will sever be loaded or saved.

Signed-off-by: Bryan Schumaker <bjschuma@gmail.com>

include/libsaria/playlist.h

@@ -18,6 +18,7 @@ namespace libsaria
 			list<sid_t>::iterator it;
 
 		public:
+			Playlist();
 			Playlist(string);
 			~Playlist();
 

libsaria/library/library.cpp

@@ -5,9 +5,11 @@ using namespace std;
 
 #include <libsaria/callback.h>
 #include <libsaria/library.h>
+#include <libsaria/playlist.h>
 #include "library.h"
 
 list<libsaria::LibraryPath> path_list;
+libsaria::Playlist lib_playlist;
 
 static void do_update(libsaria::LibraryPath *path)
 {

libsaria/library/library.h

@@ -4,7 +4,9 @@
 #include <list>
 using namespace std;
 #include <libsaria/libpath.h>
+#include <libsaria/playlist.h>
 
 extern list<libsaria::LibraryPath> path_list;
+extern libsaria::Playlist lib_playlist;
 
 #endif /* LIBSARIA_LIBRARY_SOURCE_H */

libsaria/playlist/file.cpp

@@ -35,6 +35,9 @@ namespace libsaria
 
 	void Playlist::load()
 	{
+		if (filename == "")
+			return;
+
 		LoadTask *task = new LoadTask(load_playlist, this);
 		task->queue();
 	}
@@ -51,6 +54,9 @@ namespace libsaria
 
 	void Playlist::save()
 	{
+		if (filename == "")
+			return;
+
 		SaveTask *task = new SaveTask(save_playlist, this);
 		task->queue();
 	}

libsaria/playlist/playlist.cpp

@@ -11,6 +11,10 @@ namespace libsaria
 		load();
 	}
 
+	Playlist::Playlist()
+	{
+	}
+
 	Playlist::~Playlist()
 	{
 	}