libsaria: Restore last song on startup

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

include/libsaria/task.h

@@ -16,6 +16,16 @@ class IdleTask
 		void queue_front();
 };
 
+class IdleCallback : public IdleTask
+{
+	private:
+		void (*func)();
+	public:
+		IdleCallback(void (*)());
+		~IdleCallback();
+		void run_task();
+};
+
 class WriteTask : public IdleTask
 {
 	private:

libsaria/idle/task.cpp

@@ -23,3 +23,19 @@ bool IdleTask::should_cancel(void *data)
 {
 	return false;
 }
+
+
+
+IdleCallback::IdleCallback(void (*f)())
+{
+	func = f;
+}
+
+IdleCallback::~IdleCallback()
+{
+}
+
+void IdleCallback::run_task()
+{
+	func();
+}

libsaria/library/library.cpp

@@ -1,8 +1,11 @@
 // Copyright (c) 2011 Bryan Schumaker.
 #include <libsaria/playlist.h>
 #include <libsaria/library.h>
+#include <libsaria/audio.h>
 #include <libsaria/track.h>
+#include <libsaria/prefs.h>
 #include <libsaria/deck.h>
+#include <libsaria/idle.h>
 #include <libsaria/fs.h>
 #include "library.h"
 
@@ -55,6 +58,17 @@ void pop_path(libsaria::library::Path *path)
 	}
 }
 
+void restore_current()
+{
+	unsigned int l_id = libsaria::prefs::get("libsaria.current.library");
+	unsigned int t_id = libsaria::prefs::get("libsaria.current.track");
+	libsaria::Track *track = libsaria::library::lookup(l_id, t_id);
+	if (track) {
+		track->play_now();
+		libsaria::audio::pause();
+	}
+}
+
 namespace libsaria
 {
 
@@ -133,9 +147,14 @@ namespace libsaria
 
 	void library::init()
 	{
+		IdleCallback *task;
+
 		app::mkdir("library");
 		next_id = schedule_load();
 		deck::push_back(&lib_playlist);
+
+		task = new IdleCallback(restore_current);
+		task->queue();
 	}
 
 }; /* namespace: libsaria */

libsaria/track/track.cpp

@@ -2,6 +2,7 @@
 #include <libsaria/format.h>
 #include <libsaria/track.h>
 #include <libsaria/audio.h>
+#include <libsaria/prefs.h>
 #include <libsaria/print.h>
 
 #include <taglib/tag.h>
@@ -140,6 +141,10 @@ namespace libsaria
 	void Track::play_now()
 	{
 		println("Playing: " + title + " by " + artist);
+		if (path) {
+			prefs::set("libsaria.current.library", path->id);
+			prefs::set("libsaria.current.track", id);
+		}
 		audio::load(filepath);
 		audio::play();
 		cur = this;