libsaria: Save a playlist whenever it changes

With this change, my old queue code no longer saves itself.  Instead, it
only sends out QUEUE_REFRESH notifications.

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

include/libsaria/playlist.h

@@ -22,6 +22,7 @@ namespace libsaria
 			~Playlist();
 
 			void load();
+			void save();
 			void add_ids(list<sid_t> &);
 			void rm_ids(list<sid_t> &);
 			unsigned int size();

libsaria/playlist/file.cpp

@@ -1,4 +1,5 @@
 // Copyright (c) 2012 Bryan Schumaker.
+#include <libsaria/files.h>
 #include <libsaria/playlist.h>
 
 namespace libsaria
@@ -20,6 +21,16 @@ namespace libsaria
 		}
 	}
 
+	void Playlist::save()
+	{
+		OutFile out("queue.q");
+		list<sid_t>::iterator it;
+
+		out << plist.size() << "\n";
+		for (it = plist.begin(); it != plist.end(); it++)
+			out << (*it) << "\n";
+	}
+
 }; /* Namespace: libsaria */
 
 void load_playlist(void *plist)
@@ -28,3 +39,14 @@ void load_playlist(void *plist)
 	playlist->load();
 }
 
+static void do_save_playlist(void *plist)
+{
+	libsaria::Playlist *playlist = (libsaria::Playlist *)plist;
+	playlist->save();
+}
+
+void save_playlist(void *plist)
+{
+	SaveTask *task = new SaveTask(do_save_playlist, plist);
+	task->queue();
+}

libsaria/playlist/playlist.cpp

@@ -20,12 +20,14 @@ namespace libsaria
 	void Playlist::add_ids(list<sid_t> &ids)
 	{
 		plist.insert(plist.end(), ids.begin(), ids.end());
+		save_playlist(this);
 	}
 
 	void Playlist::rm_ids(list<sid_t> &ids)
 	{
 		for (it = ids.begin(); it != ids.end(); it++)
 			plist.remove(*it);
+		save_playlist(this);
 	}
 
 	unsigned int Playlist::size()
@@ -37,6 +39,7 @@ namespace libsaria
 	{
 		sid_t id = plist.front();
 		plist.pop_front();
+		save_playlist(this);
 		return id;
 	}
 

libsaria/playlist/playlist.h

@@ -3,5 +3,6 @@
 #define LIBSARIA_PLAYLIST_INTERNAL_H
 
 void load_playlist(void *);
+void save_playlist(void *);
 
 #endif /* LIBSARIA_PLAYLIST_INTERNAL_H */

libsaria/queue/queue.cpp

@@ -14,7 +14,6 @@ libsaria::Playlist q_queue("queue.q");
 static void save_and_refresh()
 {
 	trigger_callback(QUEUE_REFRESH);
-	libsaria::queue::save();
 }
 
 namespace libsaria