Began new library scanning code

The new scanning code will use FSTrees() to find paths.  I hope it will
be easy to make a scanning progress bar with the new system.

libsaria/collection/library.py

@@ -14,41 +14,56 @@ visible  = None
 filtered = False
 
 def reset():
+	from libsaria.trees import FSTree
 	from tree import DLTree
 	from index import Index
+
+	global index
+	global tracks
+	global fs_tree
+	global tag_tree
+	global sources
+	global next_id
+	global visible
+
+	sources  = FSTree()
+
 	fs_tree  = DLTree()
 	tag_tree = DLTree()
 	index    = Index()
 	tracks   = dict()
 	next_id  = 0
 	size     = 0
-	sources  = []
+	visible  = set()
 	save()
 
 def load():
-	global fs_tree
-	global tag_tree
-	global index
-	global tracks
+	#global fs_tree
+	#global tag_tree
+	#global index
+	#global tracks
 	global next_id
 	global sources
-	global size
-	global songs
-	objects = libsaria.data.load("library", ".dl_tree")
-	if objects == None or len(objects) != 6:
+	#global size
+	#global songs
+	objects = libsaria.data.load("library", ".lib")
+	if objects == None or len(objects) != 2:
+	#if objects == None or len(objects) != 6:
 		reset()
 		return
-	(fs_tree, tag_tree, index, tracks, next_id, size) = objects
+	(sources, next_id) = objects
+	#(fs_tree, tag_tree, index, tracks, next_id, size) = objects
 	libsaria.event.start("POSTLIBLOAD")
 
 def save():
-	libsaria.data.save(
-		(fs_tree, tag_tree, index, tracks, next_id, size),
-		"library", ".dl_tree")
+	global sources
+	libsaria.data.save( (sources, next_id), "library", ".lib")
 
 def walk():
+	return []
 	for tag in tag_tree.walk_forwards():
-		yield tag[3]
+		#yield tag[3]
+		pass
 
 def file_to_id(file):
 	global fs_tree
@@ -64,7 +79,7 @@ def get_attrs(id, *attrs):
 	res = []
 	rec = tracks.get(id, None)
 	if rec == None:
-		return None
+		return [0] * len(attrs)
 
 	get  = rec.__dict__.get
 	tags = rec.tags.walk_backwards()
@@ -126,3 +141,18 @@ def is_visible(id):
 		return True
 	else:
 		return id in visible
+
+def add_source(path):
+	global sources
+	sources.insert_path(path)
+
+def scan(path):
+	add_source(path)
+	update()
+	save()
+
+def update():
+	global sources
+	sep = libsaria.path.sep
+	for path in sources.walk_paths():
+		print path