libsaria: Save queue to disk

This will restore the queue the next time ocarina is started up.

include/libsaria/queue.h

@@ -22,6 +22,7 @@ namespace libsaria
 		string next_file();
 
 		void save();
+		void load();
 	}
 }
 

libsaria/libsaria.cpp

@@ -6,6 +6,7 @@
 #include <libsaria/path.h>
 #include <libsaria/prefs.h>
 #include <libsaria/print.h>
+#include <libsaria/queue.h>
 #include <libsaria/library.h>
 #include <libsaria/format.h>
 #include <libsaria/index.h>
@@ -21,6 +22,7 @@ namespace libsaria
 		println("saria dir: %s", get_saria_dir().c_str());
 		make_saria_dir();
 		libsaria::library::load();
+		libsaria::queue::load();
 		libsaria::prefs::load();
 	}
 

libsaria/queue/file.cpp

@@ -1,10 +1,36 @@
 
+#include <libsaria/idle.h>
+#include <libsaria/callback.h>
 #include <libsaria/queue.h>
 #include "queue.h"
 
+static void do_load()
+{
+	unsigned int size;
+	sid_t songid;
+	InFile in("queue.q");
+
+	if (!in.good())
+		return;
+	in >> size;
+
+	for (unsigned int i = 0; i < size; i++) {
+		in >> songid;
+		playqueue.push_back(songid);
+	}
+
+	trigger_callback(QUEUE_REFRESH);
+}
+
 namespace libsaria
 {
 
+	void queue::load()
+	{
+		LoadTask *task = new LoadTask(do_load);
+		task->queue();
+	}
+
 	void queue::save()
 	{
 		OutFile out("queue.q");