Import old library

I can now import files from an Ocarina 4.1 library exported as xml.
Ocarina 4.2 keeps track of a list of sources, but 4.1 does not.  For
importing to work properly, the library needs to be rescanned before
running the import.  The import will set the playcount and score
attributes for each file.

libsaria/path/backup.py

@@ -8,6 +8,8 @@ import libsaria.xm as xml
 add_child = xml.add_child
 add_text  = xml.add_text
 get_attrs = library.get_attrs
+set_attr  = library.set_attr
+file2id   = library.file_to_id
 lib_file  = "library"
 if libsaria.__dev__ == True:
 	lib_file = lib_file + "-dev"
@@ -19,6 +21,11 @@ def encode_attr(doc, node, attr, value):
 	add_text(doc, child, value)
 
 
+def decode_attr(attr):
+	child = xml.child(attr)
+	return (attr.nodeName, child.data.strip())
+
+
 def encode_track(doc, node, id):
 	child = add_child(doc, node, "track")
 	(artist, album, title, filepath, score, count, genre, track, year, rate,
@@ -44,6 +51,16 @@ def encode_track(doc, node, id):
 	encode_attr(doc, child, "lenstr", lenstr)
 
 
+def decode_track(node):
+	track = dict()
+	for child in xml.children(node):
+		key, value = decode_attr(child)
+		track[key] = value
+	id = file2id(track["filepath"])
+	set_attr(id, "count", int(track["count"]))
+	set_attr(id, "score", int(track["score"]))
+
+
 def backup():
 	doc = xml.new()
 	child = add_child(doc, doc, "library")
@@ -56,4 +73,13 @@ def backup():
 	print "Wrote library to: %s" % lib_file
 
 
+def restore(file):
+	fin   = open(file)
+	doc   = xml.parse(fin)
+	child = xml.child(doc)
+	for track in xml.children(child):
+		decode_track(track)
+	library.save()
+
+
 

libsaria/path/files.py

@@ -54,6 +54,10 @@ def universal_open(file):
 			from libsaria import plugin
 		plugin.install(file)
 		return
+	if ext == ".xml":
+		import backup
+		backup.restore(file)
+		return
 	try:
 		id = libsaria.sources.file_to_id(file)
 		if id: